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Surface modification method of PBO fibers

A surface modification and fiber technology, applied in the field of surface modification of PBO fibers, can solve problems such as poor adhesion, and achieve the effects of poor adhesion, roughness and specific surface area.

Active Publication Date: 2021-04-09
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the many deficiencies in the prior art, the present invention provides a method for surface modification of PBO fibers. Specifically, modified graphene oxide is used to modify PBO fibers. The specific steps are as follows: (1) graphene oxide (2) carboxylation treatment of PBO fiber; (3) grafting modified graphene oxide on the surface of PBO fiber; The active functional groups on the surface of graphene increase the roughness and specific surface area, which can solve the problem of poor adhesion to the polymer matrix caused by the lack of functional groups on the surface of PBO fibers, and at the same time improve its mechanical properties.

Method used

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Effect test

Embodiment 1

[0024] A kind of surface modification method of PBO fiber, concrete steps are as follows:

[0025] (1) Preparation and modification of graphene oxide:

[0026] Adopt traditional Hummers method to prepare graphite oxide, in 100mL deionized water 10mg graphite oxide, ultrasonic stirring dissolves, then add appropriate amount of ammonia water, adjust the pH value of reaction system to be 9, add 0.8g p-phenylenediamine in reaction system, keep The temperature was 90° C., and the reaction system was reacted for 6 hours under the condition of mechanical stirring. After complete reaction, the product is vacuum filtered and dried to obtain modified graphene oxide;

[0027] (2) Carboxylation treatment of PBO fiber:

[0028] In a three-necked flask filled with 150ml of concentrated nitric acid, add 7g of PBO fiber, stir the reaction at 150r / min at 75°C for 1.5h, cool to room temperature, take out the PBO fiber, wash it with deionized water until neutral, vacuum Dry at 80°C for 5 hour...

Embodiment 2

[0033] A kind of surface modification method of PBO fiber, concrete steps are as follows:

[0034] (1) Preparation and modification of graphene oxide:

[0035] Adopt traditional Hummers method to prepare graphite oxide, in 100mL deionized water 10mg graphite oxide, ultrasonic stirring dissolves, then add appropriate amount of ammonia water, adjust the pH value of reaction system to be 10, add 0.5g p-phenylenediamine in reaction system, keep The temperature was 100° C., and the reaction system was reacted for 4 hours under the condition of mechanical stirring. After complete reaction, the product is vacuum filtered and dried to obtain modified graphene oxide;

[0036] (2) Carboxylation treatment of PBO fiber:

[0037] Add 6g of PBO fiber to a three-necked flask filled with 100ml of concentrated nitric acid, stir and react at 100r / min for 2h at 70°C, cool to room temperature, take out the PBO fiber, wash it with deionized water until neutral, vacuum 80 ℃ drying for 5 hours to...

Embodiment 3

[0042] A kind of surface modification method of PBO fiber, concrete steps are as follows:

[0043] (1) Preparation and modification of graphene oxide:

[0044] Graphite oxide was prepared by the traditional Hummers method, 10mg of graphite oxide in 100mL deionized water was dissolved by ultrasonic stirring, and then an appropriate amount of ammonia water was added to adjust the reaction volume.

[0045] The pH value of the system was 11, 0.2 g of p-phenylenediamine was added to the reaction system, the temperature was kept at 80° C., and the reaction system was reacted for 9 hours under the condition of mechanical stirring. After complete reaction, the product is vacuum filtered and dried to obtain modified graphene oxide;

[0046] (2) Carboxylation treatment of PBO fiber:

[0047] In a three-necked flask filled with 200ml of concentrated nitric acid, add 8g of PBO fiber, stir the reaction at 200r / min at 80°C for 2.5h, cool to room temperature, take out the PBO fiber, wash i...

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Abstract

The invention belongs to the field of high polymer materials, and particularly relates to a surface modification method of PBO fibers. The composite color-changing nanofiber membrane specifically adopts modified graphene oxide to modify the PBO fibers, and comprises the following specific steps of (1) preparing and modifying graphene oxide; (2) carrying out carboxylation treatment of PBO fibers; and (3) grafting the modified graphene oxide on the surface of the PBO fibers. Through the modification, the modified graphene oxide is grafted on the surface of the PBO fibers, and active functional groups on the surface of the modified graphene oxide are utilized, so that the roughness and the specific surface area are improved, and the problem that the surface of the PBO fibers is poor in cohesiveness with a polymer matrix due to the fact that the surface of the PBO fiber is smooth and lacks functional groups can be solved, and the mechanical property of the PBO fiber can be improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a surface modification method of PBO fibers. Background technique [0002] Poly-p-phenylenebenzobisoxazole (PBO) fiber is a high-performance aromatic heterocyclic fiber with high strength, high modulus, high temperature resistance, and high flame retardancy. Its comprehensive performance is the best among organic fibers, and it is known as For the super fiber of the 21st century. PBO fibers can be used in cutting-edge fields such as aerospace, weaponry, high-temperature filtration, and special protection. In the 1960s and 1970s, the Wright-Patteron Laboratory of the U.S. Air Force started the basic research on PBO fibers. In the 1990s, Dow Chemical Company cooperated with Japan Toyobo to develop PBO fibers. Subsequently, Toyobo succeeded in the pilot test and launched commercial products. Zylon. Afterwards, many countries in the world have carried out a lot of rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/64D06M11/74C01B32/198D06M101/30
CPCD06M11/64D06M11/74C01B32/198D06M2101/30
Inventor 陈湘栋孟昭瑞钟蔚华朱晓琳张鹏虢忠仁宫平曲志敏金子明
Owner SHANDONG NON METALLIC MATERIAL RES INST
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