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A kind of preparation method of graphene/poly-p-phenylene benzobisoxazole composite copolymer film

A technology of benzobisoxazole and polyparaphenylene, applied in the field of preparation of graphene polymer composite copolymer film, can solve the problems of low reactivity between graphene and PBO, difficulty in preparing PBO composite film, and easy agglomeration of graphene , to achieve the effect of stable phase structure, good dispersion and difficult migration

Active Publication Date: 2016-01-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the PBO composite film is difficult to prepare, graphene is easy to agglomerate in the PBO matrix, difficult to disperse, easy to migrate to the surface of the film, and the reactivity of graphene and PBO is low. Preparation method of phenylene benzobisoxazole composite copolymer film

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0013] Specific embodiment one: the preparation method of the present embodiment graphene / poly-p-phenylene benzobisoxazole composite copolymer film, carry out according to the following steps:

[0014] 1. Preparation of graphite oxide: 200-2000mL of concentrated H 2 SO 4 with 20-200mL of concentrated H 3 PO 4 Mix, then add 1~5g nano-graphite and 3~100gKMnO 4 , and then mix evenly at a temperature of 0°C to 50°C, and then continue to stir for 24 to 72 hours, then add 0.5 to 10L of distilled water after cooling, stir for 0.5 to 3 hours, and then filter through a 0.22μm microporous membrane. And wash the filter cake with distilled water until the pH value of the filtered liquid at the lower end of the filter is neutral, then freeze-dry the filter cake to obtain graphite oxide;

[0015] 2. Preparation of aminated graphene: Weigh 0.1-1g of graphite oxide powder obtained in step 1, 10-100g of amino compound, 5-40mL of N,N'-dimethylformamide, 0.5-10g of N , N'-dicyclohexylcarbod...

specific Embodiment approach 2

[0021] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the concentrated H described in step one 2 SO 4 The volume is 400mL, concentrated H 3 PO 4 The volume is 50mL. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the mass of the nano-graphite described in step 1 is 2 g. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a graphene / polyparaphenylene benzobisoxazole (PBO) composite copolymer film, relating to a preparation method of a graphene high molecular composite copolymer film and solving the problems that a PBO composite film is hard to prepare, graphene is easy to agglomerate, hard to disperse, liable to migrate to the surface of the film and relatively low in activity of reaction with PBO in a PBO base body. The method comprises the following steps: 1, preparing graphite oxide; 2, preparing aminated graphene; 3, preparing a graphene / PBO copolymer; 4, preparing the film. According to the method, graphene has good dispersity in the PBO base body, hardly agglomerate, and is stable in phase structure, unlikely to migrate to the surface of the film and relatively high in activity of reaction with the PBO. The method is used for preparing the graphene / PBO composite copolymer film.

Description

technical field [0001] The invention relates to a preparation method of a graphene polymer composite copolymer film. Background technique [0002] Poly-p-phenylenebenzobisoxazole (PBO) is the pioneer and representative of a new generation of high-strength, high-modulus, high-temperature-resistant polymer materials, and is an ideal material for preparing high-strength and high-modulus films or fibers. PBO is a kind of all-aromatic heterocyclic liquid crystal polymer, which has a highly rigid linear chain structure, and its link angle, that is, the angle between the external bonds of the ring on the rigid main chain unit, is 180°, and cannot be rotated internally. The molecular chain is rigid, so it has good mechanical properties, thermal properties and flame retardant properties. PBO is usually used to prepare high-performance fibers, but PBO composite films are difficult to prepare. As a flexible layered nanomaterial, graphene has attracted extensive attention in the field...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/00C08L79/04C08K9/04C08K9/02C08K3/04C08G73/22B29C43/58
Inventor 胡桢李楠黄玉东赵生俊王亚飞黎俊易国星李震辉
Owner HARBIN INST OF TECH