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CN111169127A - Sound-insulation noise-reduction composite corrugated plate tile and production process thereof - Google Patents

Sound-insulation noise-reduction composite corrugated plate tile and production process thereof Download PDF

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Publication number
CN111169127A
CN111169127A CN202010055367.9A CN202010055367A CN111169127A CN 111169127 A CN111169127 A CN 111169127A CN 202010055367 A CN202010055367 A CN 202010055367A CN 111169127 A CN111169127 A CN 111169127A
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China
Prior art keywords
layer
composite
sound
flame retardant
mos
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Withdrawn
Application number
CN202010055367.9A
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Chinese (zh)
Inventor
李中伟
董豪
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Jieshou Fengyang Plastic Industry Co Ltd
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Jieshou Fengyang Plastic Industry Co Ltd
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Priority to CN202010055367.9A priority Critical patent/CN111169127A/en
Publication of CN111169127A publication Critical patent/CN111169127A/en
Withdrawn legal-status Critical Current

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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a sound-insulating noise-reducing composite corrugated tile which is of a two-layer composite structure and comprises a PC layer and a sound-absorbing layer; the PC layer is prepared from the following raw materials in parts by weight: 60-70 parts of PC resin, 15-20 parts of polyacrylonitrile-butadiene-styrene copolymer, 0.8-1 part of ultraviolet absorbent, 2-3 parts of composite filler and 0.5-0.7 part of compound flame retardant; the sound insulation layer is a polyurethane rigid foam material blended by modified expanded graphite; the invention also discloses a production process of the composite corrugated plate tile. According to the composite corrugated tile, the PC layer is prepared by taking PC resin as a polymer matrix, blending and modifying the PC resin by adopting an ABS copolymer, and matching a compound flame retardant and a compound filler, and has good heat insulation, mechanical and sound insulation properties; the sound absorption layer has excellent sound absorption and insulation effects and flame retardant property; the obtained composite corrugated tile has good sound insulation, noise reduction and flame retardant properties, and is a high-performance roofing material product.

Description

Sound-insulation noise-reduction composite corrugated plate tile and production process thereof
Technical Field
The invention belongs to the field of corrugated plates, and particularly relates to a sound-insulation noise-reduction composite corrugated plate tile and a production process thereof.
Background
Corrugated boards, also known as corrugated boards, include asbestos shingles and fiberglass shingles. In recent years, asbestos shingle production has attracted increased attention due to environmental pollution and worker physical harm, and many places are gradually closing these asbestos shingle manufacturers. The glass fiber reinforced plastic tile cannot meet the actual market demand due to the defects of brittleness, poor tear resistance and the like. On the basis, a plastic wave plate is available at present. Compared with asbestos tile or glass fiber reinforced plastic tile, the plastic corrugated plate has the characteristics of better strength, convenient construction, better decorative effect and the like, thereby becoming a new substitute and being widely used in the industries of construction, decoration and the like.
However, the existing plastic wave plates are mostly PVC products and are directly extruded from a neck mold, so that the shock resistance is poor, the service life is short, and the flame retardance is not ideal; in addition, there is still a deficiency in sound insulation and noise reduction.
Disclosure of Invention
The invention aims to provide a sound-insulating and noise-reducing composite corrugated tile and a production process thereof, wherein the composite corrugated tile is of a two-layer composite structure and comprises a PC layer and a sound absorption layer, wherein the PC layer is prepared by taking PC resin as a polymer matrix, blending and modifying by adopting an ABS copolymer and matching with a compound flame retardant and a compound filler; the ABS blending modification can obtain a polymer matrix with excellent comprehensive performance, and the compounded flame retardant can endow a PC layer with good flame retardant performance; the heat insulation, mechanical and sound insulation properties of the PC layer can be improved to a certain extent by adding the composite filler; the sound absorption layer has excellent sound absorption and insulation effects and flame retardant property; the obtained composite corrugated tile has good sound insulation, noise reduction and flame retardant properties, and is a high-performance roofing material product.
The purpose of the invention can be realized by the following technical scheme:
a sound-insulating and noise-reducing composite corrugated tile is a two-layer composite structure and comprises a PC layer and a sound absorption layer;
the PC layer is prepared from the following raw materials in parts by weight: 60-70 parts of PC resin, 15-20 parts of polyacrylonitrile-butadiene-styrene copolymer, 0.8-1 part of ultraviolet absorbent, 2-3 parts of composite filler and 0.5-0.7 part of compound flame retardant;
the PC layer is prepared by the following method:
s1, placing the PC resin and the polyacrylonitrile-butadiene-styrene copolymer in a forced air drying oven for drying treatment for 8 hours at 120 ℃;
s2, primarily mixing the dried PC resin, the polyacrylonitrile-butadiene-styrene copolymer, the ultraviolet absorbent, the filler and the compound flame retardant in a high-speed mixer for 10min, and then extruding and granulating by using a single-screw extruder to prepare a polycarbonate flat plate to obtain a PC layer;
the sound absorption layer is prepared by the following method:
(1) according to the solid-liquid ratio of 1 g: putting 120mL of expanded graphite into concentrated acid, performing ultrasonic treatment at room temperature for 4h, filtering, washing with deionized water to be neutral, and performing vacuum drying at 60-65 ℃ for 3h to obtain oxidized expanded graphite;
(2) placing the oxidized expanded graphite in an aqueous solution of 4-aminophenylamine dihydrochloride, performing ultrasonic treatment at room temperature for 30min, reacting for 4h in an oil bath at 120-130 ℃, performing suction filtration, alcohol washing and water washing to neutrality, and performing vacuum drying at 60-65 ℃ for 3h to obtain modified expanded graphite;
(3) uniformly mixing polyether polyol, n-pentane, a foam stabilizer, modified expanded graphite and an amine composite catalyst to obtain a premix, mixing the premix and isophorone diisocyanate in a plastic measuring cup, violently stirring for 10-12s, quickly introducing into a mold, sealing, curing at 100 ℃ for 4 hours, and demolding to obtain a sound absorbing layer;
the ratio of the usage amount of isophorone diisocyanate to polyether polyol to the usage amount of n-pentane to the usage amount of the foam stabilizer to the usage amount of the modified expanded graphite to the usage amount of the amine composite catalyst is 70:50:1:18: 1.
Furthermore, the thickness of the PC layer is 2.8-4mm, and the thickness of the sound absorption layer is 1.2-1.6 mm.
Further, the compound flame retardant is a compound consisting of brominated styrene and antimony trioxide, and the mass ratio of the brominated styrene to the antimony trioxide is 5: 1.
Further, the composite filler is prepared by the following method:
(1) MoS is mixed according to the material-liquid ratio2Adding into hydrazine hydrate, swelling for 46-50min to obtain pretreated MoS2；
(2) The processed MoS2Placing in concentrated H2SO4In solution, oftenStirring at a warm temperature for 28-30min to insert sulfate ions into MoS2In the interlayer, the intercalated MoS2Carrying out ultrasonic treatment to separate molybdenum disulfide sheet layers to obtain MoS2Nanosheets;
(3) mixing calcium stearate and white oil, and mixing with MoS2The nano sheets and the silicon dioxide are put into a high-speed mixer to be blended, the blending temperature is 40 ℃, and the blending time is 120-130min, so that the composite filler is obtained; wherein, calcium stearate, white oil and MoS2The mass ratio of the nano-sheets to the silicon dioxide is 1:1:50: 40.
A production process of a sound-insulation noise-reduction composite corrugated tile comprises the following steps:
firstly, compounding a PC layer and a sound absorption layer through hot pressing to obtain a composite flat plate;
secondly, preheating and heating the composite flat plate, wherein the preheating temperature is 70-80 ℃, the heating temperature is 150-160 ℃, and the polycarbonate flat plate softened by heating is extruded and shaped by a forming roller to form a corrugated plate;
and thirdly, performing edge cutting treatment on the corrugated plate, tempering, straightening, drawing, cutting, inspecting and packaging to obtain the composite corrugated plate tile.
The invention has the beneficial effects that:
the composite corrugated plate tile is of a two-layer composite structure and comprises a PC layer and a sound absorption layer; the PC layer is prepared by taking PC resin as a polymer matrix, blending and modifying by adopting an ABS copolymer, and matching a compound flame retardant and a composite filler; the ABS blending modification can obtain a polymer matrix with excellent comprehensive performance, and the compounded flame retardant can endow a PC layer with good flame retardant performance; the addition of the composite filler can improve the heat insulation, mechanical and sound insulation properties of the PC layer to a certain extent, and particularly, after the calcium stearate is dissolved in the white oil, carboxyl on the calcium stearate can react with MoS2The nano sheet reacts with-OH on the surface of the silicon dioxide, so that long carbon chains are grafted on the surface of the inorganic filler, and the MoS is improved2The interface compatibility of the nanosheets and the silica with the PC substrate; in addition, MoS having hydroxyl group adsorbed on surface2The nano-sheets and the silicon dioxide have coupling effect and electrostatic attraction effect, and can break up the oxidationAgglomeration among silicon particles, and dispersing silicon dioxide to form a uniform mixed filler system; the compound filler can form strong interface interaction force with a PC molecular chain, so that on one hand, the compound filler can block the motion of the PC molecular chain segment, so that the PC molecular chain in the composite material needs more energy to complete glass transition, the glass transition temperature (Tg) is increased, and the heat resistance of the composite material is improved; on the other hand, strong interface acting force forms phase separation in a microphase interval, so that the damping performance of the composite material is effectively improved, the energy acting on the material is dissipated, and the mechanical property of the PC layer is improved; in addition, the higher the bonding strength of the PC matrix to the composite filler particle interface, and MoS2The nano sheets are in sheet-like layers, the specific surface area is large, and larger resistance needs to be overcome after sound waves are transmitted into the PC layer, so that the sound insulation performance of the PC layer is improved;
the sound absorption layer adopted by the invention is modified polyurethane foam plastic, modified expanded graphite is adopted to carry out blending modification on rigid polyurethane foam, the expanded graphite is treated by concentrated acid, more-OH is formed on the surface, and-COOH on the surface of the oxidized expanded graphite reacts with amino on the surface of 4-amino-amphetamine, so that the 4-amino-amphetamine is grafted on the oxidized expanded graphite, on one hand, the compatibility of the expanded graphite and the polyurethane foam can be improved, and on the other hand, the exposed amino functional group can act with an ester group of a PC layer matrix, so that the binding force of the sound absorption layer and the PC layer is enhanced; the modified expanded graphite is a vermicular substance with a porous structure, and after the vermicular substance is added into the rigid polyurethane foam, the foam structure closed by the rigid polyurethane foam is penetrated through by the porous structure of the vermicular substance to form a through composite material with a dense porous structure, and the through porous structures are favorable for dissipating sound energy, so that excellent sound absorption and insulation effects are achieved; in addition, the expanded graphite has the characteristics of large surface area, excellent flame retardant property and the like, and can be used as one of sound absorbing layer materials, so that the sound insulation property can be improved, and the flame retardant property of a sound absorbing layer can be improved;
the composite corrugated tile has a two-layer composite structure, and comprises a PC layer and a sound absorption layer, wherein the PC layer takes PC resin as a polymer matrix, is subjected to blending modification by adopting an ABS copolymer, and is matched with a compound flame retardant and a composite filler; the ABS blending modification can obtain a polymer matrix with excellent comprehensive performance, and the compounded flame retardant can endow a PC layer with good flame retardant performance; the heat insulation, mechanical and sound insulation properties of the PC layer can be improved to a certain extent by adding the composite filler; the sound absorption layer has excellent sound absorption and insulation effects and flame retardant property; the obtained composite corrugated tile has good sound insulation, noise reduction and flame retardant properties, and is a high-performance roofing material product.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A sound-insulating and noise-reducing composite corrugated tile is a two-layer composite structure and comprises a PC layer and a sound absorption layer;
specifically, the PC layer is prepared from the following raw materials in parts by weight: 60-70 parts of PC resin (polycarbonate), 15-20 parts of polyacrylonitrile-butadiene-styrene copolymer (ABS), 0.8-1 part of ultraviolet absorbent, 2-3 parts of composite filler and 0.5-0.7 part of compound flame retardant;
wherein the ultraviolet absorbent is 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole; the compound selectively and strongly absorbs ultraviolet rays, converts the absorbed energy into heat energy or releases harmless radiation, does not generate chemical change per se, avoids the polymer material from being damaged by the ultraviolet rays, and plays a role in protecting the polymer matrix material;
the compound flame retardant is a compound consisting of brominated styrene and antimony trioxide, and the mass ratio of the brominated styrene to the antimony trioxide is 5: 1; the compound flame retardant has excellent flame retardant effect mainly through the synergistic effect of the two, has the functions of gas-phase flame retardant and condensed-phase flame retardant, and can react with HBr generated in the combustion process of brominated styrene to generate antimony tribromide (SbBr)3) Or antimony oxybromide (SbOBr), SbBr3The density of the/SbOBr vapour is high,the flame retardant can be stagnated on the surface of a combustion object to play roles of diluting air and covering, can react with free radicals in a gas phase to play a role of consuming heat and quenching flame, and enables a PC matrix to achieve excellent flame retardant property;
polyacrylonitrile-butadiene-styrene copolymer (ABS) has good processing flowability, low notch sensitivity, good dimensional stability, high impact strength, low water absorption, but poor heat resistance and weather resistance, and low mechanical strength; the PC/ABS composite material prepared by mutually supplementing and compounding the advantages and the disadvantages of PC and ABS is excellent in comprehensive performance, low in melt viscosity compared with PC, good in processing flow property, low in notch sensitivity, high in thermal deformation temperature and mechanical strength compared with ABS, good in appearance and good in glossiness;
the composite filler is prepared by the following method: 0.5 percent of molybdenum disulfide;
(1) MoS is mixed according to the material-liquid ratio2Adding into hydrazine hydrate, swelling for 46-50min to obtain pretreated MoS2；
(2) The processed MoS2Placing in concentrated H2SO4Stirring the solution (mass fraction of 80%) at normal temperature for 28-30min to insert sulfate ions into MoS2In the interlayer, the intercalated MoS2Carrying out ultrasonic treatment to separate molybdenum disulfide sheet layers to obtain MoS2Nanosheets; firstly, the molybdenum disulfide nanosheets prepared by the method have stable structure, high yield, high purity, fewer layers and larger specific surface area, and are subjected to concentrated acid treatment and MoS2more-OH is adsorbed on the surface of the nano sheet;
(3) mixing calcium stearate and white oil, and mixing with MoS2The nano sheets and the silicon dioxide are put into a high-speed mixer to be blended, the blending temperature is 40 ℃, and the blending time is 120-130min, so that the composite filler is obtained; wherein, calcium stearate, white oil and MoS2The mass ratio of the nano-sheets to the silicon dioxide is 1:1:50: 40;
after the calcium stearate is dissolved in the white oil, carboxyl on the calcium stearate can react with MoS2The nano-sheets react with-OH on the surface of the silicon dioxide,the surface of the inorganic filler is grafted with long carbon chains, thereby improving MoS2The interface compatibility of the nanosheets and the silica with the PC substrate; in addition, MoS having hydroxyl group adsorbed on surface2The nano sheets and the silicon dioxide have a coupling effect and an electrostatic attraction effect, so that agglomeration among silicon dioxide particles can be broken, and the silicon dioxide is dispersed to form a uniform mixed filler system; the compound filler can form strong interface interaction force with a PC molecular chain, so that on one hand, the compound filler can block the motion of the PC molecular chain segment, so that the PC molecular chain in the composite material needs more energy to complete glass transition, the glass transition temperature (Tg) is increased, and the heat resistance of the composite material is improved; on the other hand, strong interface acting force forms phase separation in a microphase interval, so that the damping performance of the composite material is effectively improved, the energy acting on the material is dissipated, and the mechanical property of the PC layer is improved; in addition, the higher the bonding strength of the PC matrix to the composite filler particle interface, and MoS2The nano sheets are in sheet-like layers, the specific surface area is large, and larger resistance needs to be overcome after sound waves are transmitted into the PC layer, so that the sound insulation performance of the PC layer is improved;
the PC layer was prepared by the following method:
s1, placing the PC resin and the polyacrylonitrile-butadiene-styrene copolymer in a forced air drying oven for drying treatment for 8 hours at 120 ℃;
s2, primarily mixing the dried PC resin, polyacrylonitrile-butadiene-styrene copolymer, ultraviolet absorbent, filler and compound flame retardant in a high-speed mixer for 10min, and then extruding and granulating by using a single-screw extruder to prepare a polycarbonate flat plate with the thickness of 2.8-4mm to obtain a PC layer, wherein the processing temperature of the single-screw extruder is 240-260 ℃, the rotating speed of a host is 400rpm, and the feeding amount is 50 kg/h;
the sound absorbing layer is prepared by the following method:
(1) according to the solid-liquid ratio of 1 g: putting 120mL of expanded graphite into concentrated acid, performing ultrasonic treatment at room temperature for 4h, filtering, washing with deionized water to be neutral, and performing vacuum drying at 60-65 ℃ for 3h to obtain oxidized expanded graphite; the concentrated acid is H with the mass fraction of 98 percent2SO4And 68% HNO3According to the volume ratio of 3: 1, the expanded graphite is subjected to concentrated acid oxidation treatmentmore-COOH is formed on the surface;
(2) placing the oxidized expanded graphite in an aqueous solution of 4-aminophenylamine dihydrochloride, performing ultrasonic treatment at room temperature for 30min, reacting for 4h in an oil bath at 120-130 ℃, performing suction filtration, alcohol washing and water washing to neutrality, and performing vacuum drying at 60-65 ℃ for 3h to obtain modified expanded graphite; the ratio of the usage amount of the oxidized expanded graphite to the usage amount of the 4-amino-amphetamine dihydrochloride is 5:0.7, the-COOH on the surface of the oxidized expanded graphite reacts with the amino on the surface of the 4-amino-amphetamine, so that the 4-amino-amphetamine is grafted on the oxidized expanded graphite, on one hand, the compatibility of the expanded graphite and polyurethane foam can be improved, and on the other hand, the exposed amino functional group can act with an ester group of a PC layer matrix to enhance the binding force between the sound absorption layer and the PC layer;
(3) uniformly mixing polyether polyol, n-pentane, a foam stabilizer, modified expanded graphite and an amine composite catalyst to obtain a premix, mixing the premix and isophorone diisocyanate in a plastic measuring cup, violently stirring for 10-12s, quickly introducing into a mold, sealing, curing at 100 ℃ for 4 hours, and demolding to obtain a sound absorbing layer; controlling the thickness of the sound absorption layer to be 1.2-1.6 mm;
the ratio of the usage amount of isophorone diisocyanate to the usage amount of polyether polyol to the usage amount of n-pentane to the usage amount of foam stabilizer to the usage amount of modified expanded graphite to the usage amount of amine composite catalyst is 70:50:1:18: 1;
the modified expanded graphite is a vermicular substance with a porous structure, and after the vermicular substance is added into the rigid polyurethane foam, the foam structure closed by the rigid polyurethane foam is penetrated through by the porous structure of the vermicular substance to form a through composite material with a dense porous structure, and the through porous structures are favorable for dissipating sound energy, so that excellent sound absorption and insulation effects are achieved; in addition, the expanded graphite has the characteristics of large surface area, excellent flame retardant property and the like, and can be used as one of sound absorbing layer materials, so that the sound insulation property can be improved, and the flame retardant property of a sound absorbing layer can be improved;
the production process of the composite corrugated tile comprises the following steps:
firstly, compounding a PC layer and a sound absorption layer through hot pressing to obtain a composite flat plate;
secondly, preheating and heating the composite flat plate, wherein the preheating temperature is 70-80 ℃, the heating temperature is 150-160 ℃, and the polycarbonate flat plate softened by heating is extruded and shaped by a forming roller to form a corrugated plate;
and thirdly, performing edge cutting treatment on the corrugated plate, tempering, straightening, drawing, cutting, inspecting and packaging to obtain the composite corrugated plate tile.
Example 1
The PC layer is prepared from the following raw materials in parts by weight: 60 parts of PC resin, 15 parts of polyacrylonitrile-butadiene-styrene copolymer, 0.8 part of ultraviolet absorbent, 2 parts of composite filler and 0.5 part of compound flame retardant.
Example 2
The PC layer is prepared from the following raw materials in parts by weight: 65 parts of PC resin, 18 parts of polyacrylonitrile-butadiene-styrene copolymer, 0.9 part of ultraviolet absorbent, 2.5 parts of composite filler and 0.6 part of compound flame retardant.
Example 3
The PC layer is prepared from the following raw materials in parts by weight: 70 parts of PC resin, 20 parts of polyacrylonitrile-butadiene-styrene copolymer, 1 part of ultraviolet absorbent, 3 parts of composite filler and 0.7 part of compound flame retardant.
Comparative example 1
The molybdenum disulfide nanosheet in the composite filler in example 1 is replaced by the nanosheet which is not subjected to any treatment to prepare the composite filler, and the rest of raw materials and the preparation process are unchanged.
Comparative example 2
The composite filler in the example 1 is changed into silicon dioxide and molybdenum disulfide with the same quality, and the rest raw materials and the preparation process are unchanged.
The PC layers of examples 1-3 and comparative examples 1-2 were processed into test bars and subjected to the following performance tests:
the impact properties were tested according to GB/T8809-2015; the tensile property is tested according to GB/T1040.2-2006; slowly raising the temperature, and testing Tg; the sound insulation performance test is carried out according to GB/T18696.2-2002; the combustion performance is tested according to the US UL 94 standard; the test results are given in table 1 below:
TABLE 1
Figure BDA0002372609730000101
As is clear from Table 1, the PC layer materials obtained in examples 1 to 3 had tensile strengths of 45.8 to 46.3MPa, elongations at break of 24.5 to 24.9%, and impact strengths of 12.3 to 12.5 kJ. m-2It can be seen that the PC layer materials prepared in examples 1-3 have excellent mechanical properties; the glass transition temperatures obtained in examples 1 to 3 were 385 to 390 ℃, which indicates that the heat resistance was good; the PC layer materials obtained in the embodiments 1-3 have the sound insulation quantity of 27.9-28.8dB at the 1/3 octave weighting, which shows that the PC layer materials prepared by the invention have good sound insulation performance; the UL-94 combustion rating of the PC layer prepared in the embodiment 1-3 is V-0, and the PC layer has good flame retardant property; by combining the comparative example 1, the molybdenum disulfide nanosheet is treated by the method and then the composite filler is prepared, so that the mechanical property, the heat insulation property and the sound insulation property of the composite material can be improved; and the addition of the composite filler can improve the mechanical property, the heat insulation property and the sound insulation property of the PC layer to a certain extent by combining with the comparative example 2.
Example 4
The sound absorbing layer is prepared by the following method:
(1) according to the solid-liquid ratio of 1 g: putting 120mL of expanded graphite into concentrated acid, performing ultrasonic treatment at room temperature for 4h, filtering, washing with deionized water to be neutral, and performing vacuum drying at 60 ℃ for 3h to obtain oxidized expanded graphite; the concentrated acid is H with the mass fraction of 98 percent2SO4And 68% HNO3According to the volume ratio of 3: 1, mixing to obtain;
(2) placing the oxidized expanded graphite in an aqueous solution of 4-aminophenylamine dihydrochloride, performing ultrasonic treatment at room temperature for 30min, reacting for 4h in an oil bath at 120 ℃, performing suction filtration, alcohol washing and water washing to neutrality, and performing vacuum drying at 60 ℃ for 3h to obtain modified expanded graphite; the dosage ratio of the oxidized expanded graphite to the 4-aminophenylamine dihydrochloride is 5: 0.7;
(3) uniformly mixing polyether polyol, n-pentane, a foam stabilizer, modified expanded graphite and an amine composite catalyst to obtain a premix, mixing the premix and isophorone diisocyanate in a plastic measuring cup, violently stirring for 10s, quickly introducing into a mold, sealing, curing at 100 ℃ for 4h, and demolding to obtain a sound absorbing layer; the ratio of the usage amount of isophorone diisocyanate to polyether polyol to the usage amount of n-pentane to the usage amount of the foam stabilizer to the usage amount of the modified expanded graphite to the usage amount of the amine composite catalyst is 70:50:1:18: 1.
Comparative example 3
Uniformly mixing polyether polyol, n-pentane, a foam stabilizer, expanded graphite and an amine composite catalyst to obtain a premix, mixing the premix and isophorone diisocyanate in a plastic measuring cup, violently stirring for 10s, quickly introducing into a mold, sealing, curing at 100 ℃ for 4h, and demolding to obtain a sound absorbing layer; the ratio of the usage amount of isophorone diisocyanate to the usage amount of polyether polyol to the usage amount of n-pentane to the usage amount of foam stabilizer to the usage amount of expanded graphite to the usage amount of amine composite catalyst is 70:50:1:18: 1; here, the expanded graphite is ordinary expanded graphite.
Comparative example 4
Uniformly mixing polyether polyol, n-pentane, a foam stabilizer and an amine composite catalyst to obtain a premix, mixing the premix and isophorone diisocyanate in a plastic measuring cup, violently stirring for 10s, quickly introducing into a mold, sealing, curing at 100 ℃ for 4h, and demolding to obtain a sound absorbing layer; the ratio of the usage amounts of the isophorone diisocyanate, the polyether polyol, the n-pentane, the foam stabilizer and the amine composite catalyst is 70:50:1: 1.
The sound-absorbing layers obtained in example 4 and comparative examples 3 and 4 were subjected to the following performance tests:
limiting oxygen index test: testing by using an oxygen index analyzer, wherein the testing method is executed according to the GB/T2406.1-2008 standard; the sound insulation performance test is carried out according to GB/T18696.2-2002, and the test results are shown in the following table 2:
TABLE 2
Figure BDA0002372609730000121
As can be seen from table 2, the limiting oxygen index of the sound absorbing layer prepared in example 4 was 28.5%, and the sound absorbing layer was a flame retardant and had good flame retardancy; the 1/3 octave weighting sound insulation quantity is 29.5dB, and the sound insulation performance is good; the combination of comparative examples 3 and 4 shows that the sound insulation performance and the flame retardant performance of the rigid polyurethane foam can be improved by adding the modified expanded graphite.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (5)

1. A sound-insulating and noise-reducing composite corrugated tile is characterized by being of a two-layer composite structure and comprising a PC layer and a sound absorption layer;
the PC layer is prepared from the following raw materials in parts by weight: 60-70 parts of PC resin, 15-20 parts of polyacrylonitrile-butadiene-styrene copolymer, 0.8-1 part of ultraviolet absorbent, 2-3 parts of composite filler and 0.5-0.7 part of compound flame retardant;
the PC layer is prepared by the following method:
s1, placing the PC resin and the polyacrylonitrile-butadiene-styrene copolymer in a forced air drying oven for drying treatment for 8 hours at 120 ℃;
s2, primarily mixing the dried PC resin, the polyacrylonitrile-butadiene-styrene copolymer, the ultraviolet absorbent, the filler and the compound flame retardant in a high-speed mixer for 10min, and then extruding and granulating by using a single-screw extruder to prepare a polycarbonate flat plate to obtain a PC layer;
the sound absorption layer is prepared by the following method:
(1) according to the solid-liquid ratio of 1 g: putting 120mL of expanded graphite into concentrated acid, performing ultrasonic treatment at room temperature for 4h, filtering, washing with deionized water to be neutral, and performing vacuum drying at 60-65 ℃ for 3h to obtain oxidized expanded graphite;
(2) placing the oxidized expanded graphite in an aqueous solution of 4-aminophenylamine dihydrochloride, performing ultrasonic treatment at room temperature for 30min, reacting for 4h in an oil bath at 120-130 ℃, performing suction filtration, alcohol washing and water washing to neutrality, and performing vacuum drying at 60-65 ℃ for 3h to obtain modified expanded graphite;
(3) uniformly mixing polyether polyol, n-pentane, a foam stabilizer, modified expanded graphite and an amine composite catalyst to obtain a premix, mixing the premix and isophorone diisocyanate in a plastic measuring cup, violently stirring for 10-12s, quickly introducing into a mold, sealing, curing at 100 ℃ for 4 hours, and demolding to obtain a sound absorbing layer;
the ratio of the usage amount of isophorone diisocyanate to polyether polyol to the usage amount of n-pentane to the usage amount of the foam stabilizer to the usage amount of the modified expanded graphite to the usage amount of the amine composite catalyst is 70:50:1:18: 1.
2. The composite type corrugated tile for sound insulation and noise reduction according to claim 1, wherein the thickness of the PC layer is 2.8-4mm, and the thickness of the sound absorption layer is 1.2-1.6 mm.
3. The composite corrugated tile with the functions of sound insulation and noise reduction according to claim 1, wherein the composite flame retardant is a composite consisting of brominated styrene and antimony trioxide, and the mass ratio of the brominated styrene to the antimony trioxide is 5: 1.
4. The composite type corrugated tile for sound insulation and noise reduction according to claim 1, wherein the composite filler is prepared by the following method:
(1) MoS is mixed according to the material-liquid ratio2Adding into hydrazine hydrate, swelling for 46-50min to obtain pretreated MoS2；
(2) The processed MoS2Placing in concentrated H2SO4Stirring in the solution at normal temperature for 28-30min to insert sulfate ions into MoS2In the interlayer, the intercalated MoS2Carrying out ultrasonic treatment to separate molybdenum disulfide sheet layers to obtain MoS2Nanosheets;
(3) mixing calcium stearate and white oil, and mixing with MoS2The nano sheets and the silicon dioxide are put into a high-speed mixer to be blended, the blending temperature is 40 ℃, and the blending time is 120-130min, so that the composite filler is obtained; it is composed ofMedium calcium stearate, white oil, MoS2The mass ratio of the nano-sheets to the silicon dioxide is 1:1:50: 40.
5. The production process of the sound-insulation noise-reduction composite type wave plate tile as claimed in claim 1, characterized by comprising the following steps:
firstly, compounding a PC layer and a sound absorption layer through hot pressing to obtain a composite flat plate;
secondly, preheating and heating the composite flat plate, wherein the preheating temperature is 70-80 ℃, the heating temperature is 150-160 ℃, and the polycarbonate flat plate softened by heating is extruded and shaped by a forming roller to form a corrugated plate;
and thirdly, performing edge cutting treatment on the corrugated plate, tempering, straightening, drawing, cutting, inspecting and packaging to obtain the composite corrugated plate tile.
CN202010055367.9A 2020-01-17 2020-01-17 Sound-insulation noise-reduction composite corrugated plate tile and production process thereof Withdrawn CN111169127A (en)

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Application publication date: 20200519