TWI806572B - Multifunctional material made from discarded fire doors - Google Patents

Abstract

A multifunctional material made from discarded fire doors, including a material body and several pores. The main body of the material is made of fire door waste, ethylene vinyl acetate copolymer and ammonium polyphosphate after mixing and then sintering at high temperature. The fire door scrap has aluminum hydroxide and polymethyl methacrylate. The pores are distributed in the material body. The pores are formed after ammonium polyphosphate is removed by sintering. By adopting the fire door waste material as the material body, besides being beneficial to the environment, the fire door waste material and the pores can be used to achieve non-combustible and better heat insulation effects.

Description

Multifunctional material made from discarded fire doors

The invention relates to a composite material, in particular to a multifunctional material made from discarded fire doors.

Existing fire doors are mainly made of aluminum hydroxide and acrylic. Since acrylic will form a thermosetting polymer after cross-linking reaction, it cannot be remelted and molded, and it is difficult to recycle and reuse. It needs to be improved.

Therefore, the purpose of the present invention is to provide a kind of multifunctional material which is beneficial to environmental protection and made of discarded fire doors.

Therefore, the multi-functional material made of discarded fire doors in the present invention includes a material body and several pores. The main body of the material is made of fire door waste, ethylene vinyl acetate copolymer and ammonium polyphosphate after mixing and then sintering at high temperature. The fire door scrap has aluminum hydroxide and polymethyl methacrylate. The pores are distributed in the material body. The pores are formed after ammonium polyphosphate is removed by sintering.

The effect of the present invention is that: the use of the fire door waste material by the material body is not only beneficial to environmental protection, but also non-flammable and better heat insulation effect can be achieved by the fire door waste material and the pores.

An embodiment of the multifunctional material made from waste fire doors of the present invention includes a material body and a number of pores distributed in the material body.

The material body is made of a fire door waste, ethylene vinyl acetate copolymer (Ethylene Vinyl Acetate, EVA) and ammonium polyphosphate (Ammonium Polyphosphate, APP).

The fire door waste is a powder with aluminum hydroxide (Aluminum Hydroxide, Al(OH) ₃ ) and polymethyl methacrylate (commonly known as acrylic, Poly(methylmethacrylate), PMMA), and the weight of aluminum hydroxide and PMMA The ratio is about 6:4.

The fire door waste is first sintered at 300°C for 2 hours to remove moisture from the aluminum hydroxide to form aluminum oxide (Aluminum Oxide, AlO ₃ ).

Then, the fire door waste, EVA and APP were kneaded at 80° C. to melt the EVA.

Finally, the fire door waste, EVA and APP are sintered at 1000°C to remove the APP to form the pores.

In this embodiment, EVA is used as an adhesive for the waste fire door, and APP is used as a flux, which can reduce the sintering temperature by about 300°C compared with ordinary ceramic materials.

The fire door waste, EVA and APP in different proportions (as shown in Table 1) were made into test pieces A~F by the above-mentioned manufacturing method:

Table 1: Ratio of fire door waste, EVA and APP in test pieces A~F. Audition EVA (g) Fire door waste (g) APP(g) A 10 25 15 B 10 twenty four 16 C 10 twenty three 17 D. 10 twenty two 18 E. 10 twenty one 19 f 10 20 20

The weight ratio of the fire door waste to EVA in the test pieces A~F is about 2:1~2.5:1, and the weight ratio of the fire door waste to APP is about 1:1~1.67:1.

Table 2: The impact strength of test pieces A~F is tested by impact strength testing machine. Audition J/m A 7.57±0.09 B 10.00±0.17 C 8.55±0.45 D. 7.83±0.77 E. 7.14±0.30 f 7.09±0.23

Table 3: The flame retardant grade of the test piece is tested according to the UL94 plastic flammability standard, and the test piece is only kneaded without sintering. In order to distinguish it from other sintered test pieces A~F, the test pieces that have only been kneaded and not sintered are named A'~F'. Audition Horizontal combustion rating vertical burn rating A' HB V-0 B' HB V-0 C' HB V-0 D' HB V-0 E' HB V-0 F' HB V-0

The horizontal combustion grades of test pieces A'~F' are all HB. HB refers to the burning of test pieces placed horizontally and with a thickness of less than 3mm, and the burning speed is less than 76mm/min, or the burning length is not greater than 10mm, and the burning will stop.

The vertical burning ratings of test pieces A'~F' are all V-0. V-0 means that the vertically placed test piece burns, and the burning stops within 10 seconds, and non-ignitable substances are allowed to fall. Good flame retardant effect.

Table 4: Specific surface area and pore diameter of test pieces A~F are measured by high-efficiency gas adsorption specific surface area and pore diameter analysis and chemical adsorption-desorption analyzer. The porosity of the test pieces A~F is measured according to the drainage volume method of the Japan Concrete Association.

The drainage volume method is to measure the volume (V ₁ ) and weight (W ₁ ) of the test piece first, then put the test piece into a container filled with water and let it stand for 24 hours, then take it out and wipe the moisture on the surface, then measure the The weight (W ₂ ) of the sheet saturated with water can be used to calculate the porosity of the test sheet by the formula [1-(W ₂ -W ₁ )/V ₁ ]×100%. Audition Specific surface area (m ² /m ³ ) Average pore size (nm) Porosity(%) A 1.695×10 ⁷ 21.04 46.20±0.02 B 1.487×10 ⁷ 21.66 49.23±0.02 C 1.121×10 ⁷ 19.04 50.05±0.01 D. 1.055×10 ⁷ 19.11 48.24±0.02 E. 1.434×10 ⁷ 20.96 49.32±0.01 f 1.446×10 ⁷ 17.08 50.85±0.02

The specific surface area of the test pieces A~F is about 1.0×10 ⁷ ~1.7×10 ⁷ m ² /m ³ , the pore diameter of the pores is about 17~22 nm, and the porosity is greater than 46%. It can be seen from Table 4 that the porosity of the test piece is substantially proportional to the amount of APP added, and the average pore diameter is substantially inversely proportional to the amount of APP added.

Table 5: The thermal conductivity of the test pieces A~F is calculated by simulating the sunlight irradiating the test pieces with the light testing machine and using the formula κ (thermal conductivity)=(Q×L)/(A×T). Audition Thermal conductivity (W/m.K) A 0.25 B 0.29 C 0.16 D. 0.26 E. 0.24 f 0.21

The thermal conductivity of test pieces A~F is about 0.15~0.30 W/m∙K, and the heat insulation effect is good.

Table 6: The moisture absorption rate of the test pieces A~F is measured after drying the test pieces in an oven at 60°C for 24 hours (V ₁ ), and then placed them in an airtight and insulated container filled with water vapor for 3 hours. Measure the weight (V ₂ ) after moisture absorption, and calculate with the formula [(V ₁ -V ₂ )/V ₁ ] × 100%. Audition Moisture absorption rate (%) A 0.62 B 0.38 C 0.16 D. 0.28 E. 0.56 f 0.37

The moisture absorption rate of the test pieces A~F is about 0.15~0.65%. It can be seen from Table 6 and Table 4 that the moisture absorption rate is substantially proportional to the average pore size.

Table 7: The dye adsorption rate of test pieces A to F is to put the test piece into the dye aqueous solution with a concentration (C ₀ ) of 12.5ppm at 30°C and shake for 30 minutes, and then measure the adsorption rate of the test piece with an ultraviolet spectrometer. The concentration (C _e ) of the dye solution is calculated by the formula [(C ₀ -C _e )/C ₀ ]. The dye is methylene blue (Methylene Blue, MB). Audition Dye adsorption rate (%) A 56.22 B 50.48 C 49.39 D. 47.58 E. 61.49 f 46.62

The dye adsorption rate of test pieces A~F is about 45~62%. It can be seen from Table 7 and Table 4 that the dye adsorption rate is substantially proportional to the average pore size.

According to the above, this embodiment has multiple functions such as non-flammability, good heat insulation, moisture absorption and dye adsorption due to the high content of inorganic substances in the fire door waste and the voids, and can be applied in different fields .

The present invention adopts the waste fire door material by the material body, which not only benefits the environment, but also achieves non-combustibility and better heat insulation effect by the waste fire door material and the pores. Therefore, the object of the present invention can indeed be achieved.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

Claims (9)

A multifunctional material made of waste fire doors, including: a material body, which is made of a fire door waste, ethylene vinyl acetate copolymer and ammonium polyphosphate after mixing and then sintering at a high temperature of 1000°C. The waste material has aluminum hydroxide and polymethyl methacrylate; and several pores are distributed in the material body, and the pores are formed after ammonium polyphosphate is removed by sintering. The multifunctional material made of waste fire doors as described in Claim 1 has a porosity greater than 46%, wherein the pore diameter of the pores is about 17-22nm. As mentioned in Claim 1, the thermal conductivity of the multifunctional material made from discarded fire doors is about 0.15~0.30W/m. K. For the multifunctional material made from waste fire doors as described in claim 1, the moisture absorption rate is about 0.15-0.65%. For the multifunctional material made of waste fire doors as described in claim 1, the dye adsorption rate is about 45-62%. The multifunctional material made of waste fire doors as described in claim 1, wherein the fire door waste is a powder with aluminum hydroxide and polymethyl methacrylate, and the fire door waste is mixed with ethylene vinyl acetate The copolymer and ammonium polyphosphate are sintered at 300°C for 2 hours before kneading to remove moisture from aluminum hydroxide and form alumina. The multifunctional material made of waste fire doors as described in claim 1, wherein the waste fire doors, ethylene vinyl acetate copolymer and ammonium polyphosphate are kneaded at 80°C to melt the ethylene vinyl acetate copolymer. The multifunctional material made from waste fire doors as described in claim 1, Wherein, the weight ratio of aluminum hydroxide to polymethyl methacrylate in the fire door waste is about 6:4. The multi-functional material made of waste fire doors as described in Claim 1, wherein the weight ratio of the waste fire doors to ethylene vinyl acetate copolymer is about 2:1~2.5:1, and the waste fire doors and polyethylene The weight ratio of ammonium phosphate is about 1:1~1.67:1.