CN102002851A - PBO (Poly-p-phenylenebenzobisoxazazole) fiber fabric ship with super buoyancy and preparation method thereof - Google Patents

Abstract

A poly-p-phenylenebenzobisoxazole fiber fabric boat with super buoyancy and a preparation method thereof, relating to a fiber fabric boat with super buoyancy and a preparation method thereof, to obtain a boat with a load exceeding the theoretical load and low movement resistance in water . The fiber fabric boat is composed of a support body and a hydrophobic poly-p-phenylene benzobisoxazole fiber fabric coated on the outer surface of the support body. Preparation method: After extracting and removing the surface coating of the PBO fiber fabric, immerse it in the perfluoroalkyl siloxane solution, soak and dry it, repeat soaking and drying it for 4 to 6 times, and then heat and solidify to obtain a hydrophobic polymer. The p-phenylene benzobisoxazole fiber fabric is then coated on the outer surface of the support body. In the present invention, the contact angle between the PBO fiber fabric with hydrophobic properties and water reaches 142°～153°, and then the poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy of the present invention can carry more than 30% of the theoretical load. % to 50% by weight.

Description

A poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy and preparation method thereof

technical field

The invention relates to a fiber fabric boat with super buoyancy and a preparation method thereof.

Background technique

PBO fiber (poly-p-phenylene benzobisoxazole fiber) is a compound with the best performance of the existing aromatic heterocycle-containing benzene nitrogen polymer. PBO fiber has the characteristics of high strength, high modulus and good heat resistance. The tensile strength of Toyobo Zylon is 5.8MPa, the tensile modulus of high-model products is 280Gpa, the thermal decomposition temperature is 650°C, and the limiting oxygen index is 68. It does not burn or shrink in flames, and has excellent heat resistance and Flame retardancy is higher than any other organic fiber. Mainly used in heat-resistant industrial textiles and fiber reinforced materials. Therefore, PBO fiber is known as "the super fiber of the 21st century". The tensile elastic modulus of PBO fiber is twice that of high-modulus Kevlar-149 fiber, and it is higher than that of aerospace-grade carbon fiber. There are filaments and short filaments of PBO fiber, which can be used as reinforcement materials and special fabrics, and can be used as structural materials for military aircraft, important facilities and spacecraft, and can also be used for anti-ray, waterproof, flame-retardant and protective clothing. Taking advantage of its flame retardant properties, PBO spinning can be used to prepare firefighting clothing. The performance of fire-fighting clothing directly affects the safety guarantee of rescue and fire-fighting personnel at the fire-fighting scene, so special attention must be paid to its flame resistance and workability.

PBO fiber has ultra-high strength and light weight. After being made into thin-gauge fabrics with excellent workability, it has good flame retardancy. It can be used to produce high-performance firefighting clothing, furnace front clothing, welding clothing, protective clothing for cutting resistance, Racing suits, rider suits, various sportswear, etc. will replace existing organic fiber materials and be used in new fields where general superfibers cannot be applied.

Contents of the invention

The object of the present invention is to provide a poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy and a preparation method thereof, so as to obtain a boat with a load exceeding the theoretical load and low movement resistance in water.

The poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy of the present invention is made of a support body and a poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties coated on the outer surface of the support body, wherein The surface of the poly-p-phenylene benzobisoxazole fiber fabric is covered with a layer of perfluoroalkylsiloxane film with a thickness of 30-40nm, and the pore size of the poly-p-phenylene benzobisoxazole fiber fabric is not greater than 2.0mm×2.0 mm.

The preparation method of the poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy of the present invention is realized through the following steps: one, the preparation of the poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties: a. Mix 1% to 8% of perfluoroalkylsiloxane, 1% to 10% of water, 1% to 10% of glacial acetic acid and the rest of ethanol by weight percentage, and perform ultrasonic treatment for 30 to 120 minutes to obtain Perfluoroalkylsiloxane solution, wherein the general chemical formula of the perfluoroalkylsiloxane is CF ₃ (CF ₂ ) _n Si(OC _m H _2m+1 ) ₃ , where n=2～20, m =1 to 20; b, the poly-p-phenylene benzobisoxazole fiber fabric (PBO) is extracted with an organic solvent to remove the surface coating, dried at room temperature, then washed with water, and then dried; wherein the poly-p-phenylene benzobisoxazole fiber fabric (PBO) The pore size of the bisoxazole fiber fabric is not more than 2.0mm × 2.0mm; c, the poly-p-phenylene benzobisoxazole fiber fabric treated in step 2 is immersed in the perfluoroalkylsiloxane solution prepared in step 1 After soaking for 10-60s, take it out and dry it; d, repeat the operation of step 3 for 4-6 times to obtain a poly-p-phenylenebenzobisoxazole fiber fabric with a perfluoroalkylsiloxane solution impregnated on the surface; e, Insulate the poly-p-phenylene benzobisoxazole fiber fabric obtained in step 4 at 100-120°C for 3-12 hours, that is, cover the poly-p-phenylene benzobisoxazole fiber fabric with a layer of perfluoroalkylsiloxane alkane film with a film thickness of 30-40nm to obtain a poly-p-phenylenebenzobisoxazole fiber fabric with hydrophobic properties;

2. Coating the poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties prepared in step 1 on the surface of the support body to obtain a super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat.

The present invention adopts a simple solution impregnation method to form a super-hydrophobic surface on the surface of PBO fibers with macroscopic roughness. First, the perfluoroalkyl siloxane with low surface energy is crosslinked with The surface of the extracted PBO fiber fabric is heated and cured to form super-hydrophobic PBO fibers. Then it is coated on the outer surface of the support to obtain a poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy performance. The poly-p-phenylene benzobisoxazole fiber fabric ship has the advantages of large load capacity, low navigation resistance in water, high hull strength, scratch resistance and collision resistance. At the same time, PBO fiber fabric is used as an additional material on the surface of the support body (hull), which provides additional buoyancy for the hull, reduces sailing resistance, and provides sufficient protection (bulletproof, collision resistance, etc.) for the hull.

The poly(p-phenylenebenzobisoxazole) fiber fabric with a surface covered with a layer of perfluoroalkylsiloxane film prepared in step 1 of the present invention has good hydrophobic performance, and the contact angle with water reaches 142°-153°. Furthermore, the super-buoyancy poly-p-phenylenebenzobisoxazole fiber fabric boat of the present invention can carry a weight exceeding 30% to 50% of the theoretical load, wherein the theoretical load is the buoyancy obtained by the fiber fabric boat draining water.

The super buoyancy of the present invention refers to the extra buoyancy that the PBO fiber fabric boat itself has by draining the buoyancy obtained, this buoyancy is brought by the hydrophobicity of the surface of the PBO fiber fabric, the main reason is that its surface has superhydrophobicity , the water cannot completely infiltrate its surface, that is, the water-PBO surface cannot replace the air-PBO surface, so that part of the air is between the PBO fiber and the water, and this part of the air provides additional buoyancy.

Detailed ways

The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.

Specific embodiment 1: The poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy in this embodiment is composed of a support body and poly-p-phenylene benzobisoxazole with hydrophobic properties coated on the outer surface of the support body. The surface of the poly-p-phenylene benzobisoxazole fiber fabric is covered with a layer of perfluoroalkylsiloxane film with a thickness of 30-40nm, and the pore size of the poly-p-phenylene benzobisoxazole fiber fabric is different. Greater than 2.0mm×2.0mm.

The support in this embodiment refers to an open container that can be used to load articles.

In this embodiment, the poly-p-phenylenebenzobisoxazole fiber fabric covered with a layer of perfluoroalkylsiloxane film coated on the outer surface of the support body has good hydrophobic properties, and the contact angle with water reaches 142°~ 153°. Furthermore, the poly-p-phenylenebenzobisoxazole fiber fabric boat with super buoyancy in this embodiment can carry a weight exceeding 30% to 50% of the theoretical load.

Embodiment 2: This embodiment is different from Embodiment 1 in that the material of the support body is glass or metal. Other parameters are the same as in the first embodiment.

The material of the support body in this embodiment is not limited to the ones listed above, and any material that can be fixed and formed can be used in this embodiment.

Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the pore size of the poly-p-phenylenebenzobisoxazole fiber fabric is 0.5mm×0.5mm. Other parameters are the same as those in Embodiment 1 or Embodiment 2.

The poly-p-phenylene benzobisoxazole fiber fabric of this embodiment has the best hydrophobic performance, and the contact angle with water reaches 153°.

Embodiment 4: The difference between this embodiment and Embodiment 1, 2 or 3 is that the general chemical formula of the perfluoroalkylsiloxane in the perfluoroalkylsiloxane film is CF ₃ (CF ₂ ) _n Si(OC _m H _2m+1 ) ₃ , wherein n=2-20, m=1-20. Other parameters are the same as those in Embodiment 1, 2 or 3.

Embodiment 5: This embodiment differs from Embodiment 4 in that n=6-10, m=1-3. Other parameters are the same as in Embodiment 4.

Embodiment 6: This embodiment differs from Embodiment 4 in that n=6 and m=2. Other parameters are the same as in Embodiment 4.

The chemical structural formula of perfluoroalkylsiloxane in the perfluoroalkylsiloxane film in this embodiment is as follows:

Embodiment 7: The difference between this embodiment and one of Embodiments 1 to 6 is that in the poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties, the poly-p-phenylene benzobisoxazole fiber fabric is a single Fiber cloth, twill, non-woven, plain weave, satin weave or three-dimensional fabric. Other parameters are the same as one of the specific embodiments 1 to 6.

Embodiment 8: This embodiment is the preparation method of the poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy described in Embodiment 1, which is realized through the following steps: 1. Polymer with hydrophobic properties The preparation of p-phenylene benzobisoxazole fiber fabric: a, 1% to 8% perfluoroalkyl siloxane, 1% to 10% water, 1% to 10% glacial acetic acid and The remaining amount of ethanol was mixed and ultrasonically treated for 30 to 120 minutes to obtain a perfluoroalkylsiloxane solution; b. The poly-p-phenylenebenzobisoxazole fiber fabric (PBO) was extracted with an organic solvent to remove the surface coating, Dry at room temperature, then wash with water, and dry again; wherein the pore size of the poly(p-phenylenebenzobisoxazole) fiber fabric is not greater than 2.0mm×2.0mm; c, the poly(p-phenylenebenzobisoxazole) treated in step 2 Immerse the azole fiber fabric in the perfluoroalkyl siloxane solution prepared in step 1, soak for 10-60 seconds, take it out and dry it in the air; d, repeat the operation of step 3 4 to 6 times to obtain a surface impregnated with perfluoroalkyl siloxane The poly-p-phenylene benzobisoxazole fiber fabric of alkane solution; e, the poly-p-phenylene benzobisoxazole fiber fabric obtained in step 4 is kept at 100-120° C. for 3-12 hours, that is, in the poly-p-phenylene The benzobisoxazole fiber fabric is covered with a layer of perfluoroalkylsiloxane film with a film thickness of 30-40nm to obtain a poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties;

2. Coating the poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties prepared in step 1 on the surface of the support body to obtain a super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat.

In this embodiment, a poly-p-phenylenebenzobisoxazole fiber fabric boat with super buoyancy as described in Embodiment 1 is prepared. The supporting body mentioned in step 2 of this embodiment refers to an open container that can be used to load articles.

The poly-p-phenylenebenzobisoxazole fiber fabric with hydrophobic properties prepared in step 1 of this embodiment has good hydrophobic properties, and the contact angle with water reaches 142°-153°. The super-buoyant poly-p-phenylene benzobisoxazole fiber fabric boat can carry a weight exceeding 30% to 50% of the theoretical load.

Specific embodiment nine: the difference between this embodiment and specific embodiment eight is that in step a of step one, 1.5% to 4% perfluoroalkyl siloxane, 3% to 8% water, 3% ~8% glacial acetic acid is mixed with the balance ethanol. Other steps and parameters are the same as those in Embodiment 8.

The mass concentration of the perfluoroalkylsiloxane solution obtained in Step 1 of this embodiment is 1.5%-4%.

Specific embodiment ten: The difference between this embodiment and specific embodiment one is that in the a step of step one, 2% perfluoroalkylsiloxane, 5% water, 5% glacial acetic acid and the balance ethanol mix. Other steps and parameters are the same as those in Embodiment 8.

The mass concentration of the perfluoroalkylsiloxane solution obtained in Step 1 of this embodiment is 2%.

Embodiment 11: The difference between this embodiment and Embodiment 8, 9 or 10 is that the general chemical formula of the perfluoroalkylsiloxane in Step a of Step 1 is CF ₃ (CF ₂ ) _n Si( OC _m H _2m+1 ) ₃ , wherein n=2-20, m=1-20. Other steps and parameters are the same as those in Embodiment 8, 9 or 10.

Embodiment 12: This embodiment is different from Embodiment 11 in that n=6-10, m=1-3. Other steps and parameters are the same as those in Embodiment 11.

Embodiment 13: This embodiment differs from Embodiment 11 in that n=6, m=2. Other steps and parameters are the same as those in Embodiment 11.

The chemical structural formula of the perfluoroalkylsiloxane in this embodiment is the same as that in Embodiment 6.

Embodiment 14: The difference between this embodiment and one of Embodiments 8 to 13 is that the poly-p-phenylene benzobisoxazole fiber fabric in step b of step 1 is unidirectional fiber cloth, twill cloth, non-woven fabric , plain weave, satin weave or three-dimensional fabric. Other steps and parameters are the same as one of the eighth to thirteenth specific embodiments.

Embodiment 15: This embodiment differs from Embodiments 8 to 14 in that the pore size of the poly-p-phenylenebenzobisoxazole fiber fabric in step b of step 1 is 0.5 mm×0.5 mm. Other steps and parameters are the same as one of the eighth to fourteenth specific embodiments.

Embodiment 16: This embodiment is different from Embodiment 8 to Embodiment 15 in that step c of step 1 soaks for 20 to 50 seconds. Other steps and parameters are the same as those in Embodiments 8 to 15.

Specific Embodiment 17: The difference between this embodiment and one of specific embodiments 8 to 15 is that step c of step 1 soaks for 30 s. Other steps and parameters are the same as those in Embodiments 8 to 15.

Embodiment 18: The difference between this embodiment and one of Embodiments 8 to 17 is that the poly-p-phenylenebenzobisoxazole fiber fabric obtained in step c in step e of step 1 is kept at 110° C. for 10 h . Other steps and parameters are the same as one of the eighth to seventeenth specific embodiments.

Specific Embodiment Nineteen: The difference between this embodiment and one of the eighth to eighteenth specific embodiments is that the material of the support in step 2 is glass or metal. Other parameters are the same as those in Embodiment 8 to Embodiment 18.

The material of the support body in this embodiment is not limited to the ones listed above, and any material that can be fixed and formed can be used in this embodiment.

Specific Embodiment Twenty: The preparation method of the poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy in this embodiment is realized through the following steps: 1. Poly-p-phenylene benzobisoxazole with hydrophobic properties Preparation of azole fiber fabric: a, mix 1% perfluoroalkylsiloxane, 3% water, 3% glacial acetic acid and the rest of ethanol by weight percentage, and ultrasonically treat for 30min to obtain perfluoroalkylsiloxane Oxane solution; b, the poly-p-phenylene benzobisoxazole fiber fabric (PBO) is extracted with an organic solvent to remove the surface coating, dried at room temperature, then washed with water, and then dried; wherein the poly-p-phenylene benzobisoxazole fiber fabric (PBO) The pore size of the bisoxazole fiber fabric is 0.5mm × 0.5mm; c, the poly-p-phenylene benzobisoxazole fiber fabric treated in step 2 is immersed in the perfluoroalkylsiloxane solution prepared in step 1, soaked After 30s, take out and dry; d, repeat the operation of step 3 6 times, obtain the poly-p-phenylene benzobisoxazole fiber fabric that the surface is impregnated with perfluoroalkyl siloxane solution; The p-phenylene benzobisoxazole fiber fabric is kept warm at 110°C for 10 hours, that is, a layer of perfluoroalkylsiloxane film is covered on the poly-p-phenylene benzobisoxazole fiber fabric, and the film thickness is 40nm to obtain Hydrophobic poly-p-phenylene benzobisoxazole fiber fabric;

2. Coating the poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties prepared in step 1 on the surface of the support body to obtain a super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat.

The perfluoroalkylsiloxane used in step a of step 1 of this embodiment is the one described in Embodiment 6. The hydrophobic poly-p-phenylenebenzobisoxazole fiber fabric prepared in Step 1 of this embodiment has a contact angle with water of 142°, and has very good hydrophobic properties.

The support described in step 2 of this embodiment is an open container made of ordinary glass, with a size of 30mm×20mm×10mm, and a theoretical load of 6g. The load of the super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat prepared in this embodiment reaches 8.5 g, exceeding 42% of the theoretical load of the support. In this embodiment, the load-bearing performance test adopts the method of adding heavy objects to the middle of the ship, and finally determines the carrying capacity of the ship by preventing water from entering the hull through the maximum load-bearing of the placed heavy objects.

Specific Embodiment Twenty-one: The preparation method of the poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy in this embodiment is realized through the following steps: 1. Poly-p-phenylene benzobisoxazole with hydrophobic properties Preparation of oxazole fiber fabric: a, mix 2% perfluoroalkyl siloxane, 5% water, 5% glacial acetic acid and the rest of ethanol by weight percentage, and ultrasonically treat for 60min to obtain perfluoroalkyl Siloxane solution; b, the poly-p-phenylene benzobisoxazole fiber fabric (PBO) is extracted with an organic solvent to remove the surface coating, dried at room temperature, then washed with water, and then dried; wherein the poly-p-phenylene benzobisoxazole fiber fabric (PBO) The aperture size of bisoxazole fiber fabric is 0.5mm * 0.5mm; c, the poly-p-phenylene benzobisoxazole fiber fabric after step 2 is immersed in the perfluoroalkyl siloxane solution prepared in step 1, After soaking for 30s, take it out and dry it; d, repeat the operation of step 3 5 times to obtain the poly-p-phenylene benzobisoxazole fiber fabric whose surface is impregnated with perfluoroalkylsiloxane solution; The poly-p-phenylene benzobisoxazole fiber fabric is kept at 110°C for 10 hours, that is, the poly-p-phenylene benzobisoxazole fiber fabric is covered with a layer of perfluoroalkylsiloxane film with a film thickness of 35nm, and the obtained Polyparaphenylene benzobisoxazole fiber fabric with hydrophobic properties;

2. Coating the poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties prepared in step 1 on the surface of the support body to obtain a super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat.

The perfluoroalkylsiloxane used in step a of step 1 of this embodiment is the one described in Embodiment 6. The hydrophobic poly-p-phenylenebenzobisoxazole fiber fabric prepared in Step 1 of this embodiment has a contact angle with water of 153°, and has very good hydrophobic properties.

The support described in step 2 of this embodiment is an open container made of ordinary glass, with a size of 30mm×20mm×10mm, and a theoretical load of 6g. The load of the super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat prepared in this embodiment reaches 8.8 g, exceeding 47% of the theoretical load of the support.

Specific embodiment twenty-two: The preparation method of the poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy in this embodiment is realized through the following steps: 1. Poly-p-phenylene benzobisoxazole with hydrophobic properties Preparation of oxazole fiber fabric: a, by weight percentage, 4% perfluoroalkyl siloxane, 8% water, 8% glacial acetic acid and the ethanol of the remainder are mixed, and ultrasonically treated for 90min to obtain perfluoroalkyl Siloxane solution; b, the poly-p-phenylene benzobisoxazole fiber fabric (PBO) is extracted with an organic solvent to remove the surface coating, dried at room temperature, then washed with water, and then dried; wherein the poly-p-phenylene benzobisoxazole fiber fabric (PBO) The aperture size of bisoxazole fiber fabric is 0.5mm * 0.5mm; c, the poly-p-phenylene benzobisoxazole fiber fabric after step 2 is immersed in the perfluoroalkyl siloxane solution prepared in step 1, After soaking for 30s, take it out and dry it; d, repeat the operation of step 3 5 times to obtain the poly-p-phenylene benzobisoxazole fiber fabric whose surface is impregnated with perfluoroalkylsiloxane solution; The poly-p-phenylene benzobisoxazole fiber fabric is kept at 110°C for 10 hours, that is, the poly-p-phenylene benzobisoxazole fiber fabric is covered with a layer of perfluoroalkylsiloxane film with a film thickness of 35nm, and the obtained Polyparaphenylene benzobisoxazole fiber fabric with hydrophobic properties;

2. Coating the poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties prepared in step 1 on the surface of the support body to obtain a super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat.

The perfluoroalkylsiloxane used in step a of step 1 of this embodiment is the one described in Embodiment 6. The hydrophobic poly-p-phenylenebenzobisoxazole fiber fabric prepared in Step 1 of this embodiment has a contact angle with water of 148°, and has very good hydrophobic properties.

The support described in step 2 of this embodiment is an open container made of ordinary glass, with a size of 30mm×20mm×10mm, and a theoretical load of 6g. The load of the super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat prepared in this embodiment reaches 8.25g, exceeding 37.5% of the theoretical load of the support.

Specific embodiment twenty-three: The preparation method of the poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy in this embodiment is realized through the following steps: 1. Poly-p-phenylene benzobisoxazole with hydrophobic properties Preparation of oxazole fiber fabric: a, by weight percentage, 8% perfluoroalkyl siloxane, 10% water, 10% glacial acetic acid and the ethanol of the remainder are mixed, sonicated for 120min to obtain perfluoroalkyl Siloxane solution; b, the poly-p-phenylene benzobisoxazole fiber fabric (PBO) is extracted with an organic solvent to remove the surface coating, dried at room temperature, then washed with water, and then dried; wherein the poly-p-phenylene benzobisoxazole fiber fabric (PBO) The aperture size of bisoxazole fiber fabric is 0.5mm * 0.5mm; c, the poly-p-phenylene benzobisoxazole fiber fabric after step 2 is immersed in the perfluoroalkyl siloxane solution prepared in step 1, After soaking for 30s, take it out and dry it; d, repeat the operation of step 3 4 times to obtain the poly-p-phenylene benzobisoxazole fiber fabric whose surface is impregnated with perfluoroalkylsiloxane solution; The poly-p-phenylene benzobisoxazole fiber fabric is kept at 110°C for 10 hours, that is, the poly-p-phenylene benzobisoxazole fiber fabric is covered with a layer of perfluoroalkylsiloxane film with a film thickness of 30nm, and the obtained Polyparaphenylene benzobisoxazole fiber fabric with hydrophobic properties;

2. Coating the poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties prepared in step 1 on the surface of the support body to obtain a super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat.

The perfluoroalkylsiloxane used in step a of step 1 of this embodiment is the one described in Embodiment 6. The hydrophobic poly-p-phenylenebenzobisoxazole fiber fabric prepared in Step 1 of this embodiment has a contact angle with water of 143°, and has very good hydrophobic properties.

The support described in step 2 of this embodiment is an open container made of ordinary glass, with a size of 30mm×20mm×10mm, and a theoretical load of 6g. The load of the super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat prepared in this embodiment reaches 8.0 g, exceeding 33.3% of the theoretical load of the support.

Claims (10)

1. A poly-p-phenylene benzobisoxazole fiber fabric ship with super buoyancy is characterized in that the poly-p-phenylene benzobisoxazole fiber fabric ship with super buoyancy is made of a support body and is coated outside the support body The surface is composed of poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties, wherein the surface of the poly-p-phenylene benzobisoxazole fiber fabric is covered with a perfluoroalkylsiloxane film with a thickness of 30-40nm. The pore size of the poly-p-phenylene benzobisoxazole fiber fabric is not greater than 2.0mm×2.0mm. 2. A kind of poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy according to claim 1, characterized in that the aperture size of the poly-p-phenylene benzobisoxazole fiber fabric is 0.5 mm × 0.5 mm. 3. A kind of polyparaphenylene benzobisoxazole fiber fabric boat with super buoyancy according to claim 1 or 2, it is characterized in that perfluoroalkylsiloxane in the perfluoroalkylsiloxane film The general chemical formula of alkanes is CF ₃ (CF ₂ ) _n Si(OC _m H _2m+1 ) ₃ , where n=2-20, m=1-20. 4. A kind of poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy according to claim 1 and 2, characterized in that said poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties The medium poly-p-phenylene benzobisoxazole fiber fabric is unidirectional fiber cloth, twill cloth, non-woven fabric, plain weave, satin weave or three-dimensional fabric. 5. the preparation method of a kind of poly-p-phenylene benzobisoxazole fiber fabric ship with super-buoyancy as claimed in claim 1, is characterized in that the poly-p-phenylene benzobisoxazole fiber fabric ship with super buoyancy The preparation method is realized through the following steps: 1. Preparation of poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties: a. Add 1% to 8% perfluoroalkylsiloxane by weight percentage , 1% to 10% of water, 1% to 10% of glacial acetic acid and the rest of ethanol were mixed, and ultrasonically treated for 30 to 120 minutes to obtain a perfluoroalkylsiloxane solution; b. The oxazole fiber fabric is extracted with an organic solvent to remove the surface coating, dried at room temperature, then washed with water, and then dried; the pore size of the poly-p-phenylenebenzobisoxazole fiber fabric is not greater than 2.0mm×2.0mm; c 1. Immerse the poly-p-phenylene benzobisoxazole fiber fabric treated in step 2 in the perfluoroalkylsiloxane solution prepared in step 1, after soaking for 10-60s, take it out and dry it; d, repeat the operation of step 3 4～6 times, get the poly-p-phenylene benzobisoxazole fiber fabric that the surface is impregnated with perfluoroalkyl siloxane solution; e, the poly-p-phenylene benzobisoxazole fiber fabric that step 4 gets Keep warm at ~120°C for 3-12 hours, that is, cover a layer of perfluoroalkylsiloxane film on the poly-p-phenylene benzobisoxazole fiber fabric, the film thickness is 30-40nm, and obtain poly-p-phenylene with hydrophobic properties. Benzobisoxazole fabrics; 2. Coating the poly-p-phenylene benzobisoxazole fiber fabric with hydrophobic properties prepared in step 1 on the surface of the support body to obtain a super-buoyancy poly-p-phenylene benzobisoxazole fiber fabric boat. 6. the preparation method of a kind of poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy according to claim 5, it is characterized in that in the a step of step 1, 1.5%～4% of Perfluoroalkyl siloxane, 3%-8% water, 3%-8% glacial acetic acid and the rest ethanol are mixed. 7. the preparation method of a kind of poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy according to claim 5, it is characterized in that in the step a of step 1, 2% perfluoroalkane Mix silicone, 5% water, 5% glacial acetic acid and the rest ethanol. 8. A kind of preparation method of poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy according to claim 5, 6 or 7, characterized in that the perfluoroalkyl group described in step a of step 1 The general chemical formula of siloxane is CF ₃ (CF ₂ ) _n Si(OC _m H _2m+1 ) ₃ , wherein n=2-20, m=1-20. 9. the preparation method of a kind of poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy according to claim 8, is characterized in that in the b step of step 1, poly-p-phenylene benzobisoxazole fiber The fabric is unidirectional fabric, twill, non-woven fabric, plain weave, satin weave or three-dimensional fabric. 10. according to claim 5,6 or 7 described a kind of preparation method of poly-p-phenylene benzobisoxazole fiber fabric boat with super buoyancy, it is characterized in that in the step b of step 1, poly-p-phenylene benzo The pore size of the bisoxazole fiber fabric is 0.5mm×0.5mm.