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Graphene nanobelt graft modified PBO polymer and preparation method thereof

A graphene nanoribbon, PBO polymer technology, applied in the field of modified PBO polymer and its preparation, can solve the problems of low tensile strength of PBO fiber, and achieve the effect of improving tensile properties

Active Publication Date: 2014-07-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is to solve the technical problem of the low tensile strength of the existing PBO fiber, and provide a kind of graphene nanoribbon graft modified PBO polymer and its preparation method

Method used

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  • Graphene nanobelt graft modified PBO polymer and preparation method thereof
  • Graphene nanobelt graft modified PBO polymer and preparation method thereof

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specific Embodiment approach 2

[0020] Specific embodiment two: the preparation method of a kind of graphene nanoribbon graft modification PBO polymer described in specific embodiment one, carry out according to the following steps:

[0021] 1. Add phosphorus pentoxide to phosphoric acid, stir and dissolve the polyphosphoric acid solution;

[0022] Two, adding the carboxylated graphene nanobelts to the polyphosphoric acid solution prepared in step 1, stirring for 0.5 to 2 hours to obtain a dispersed solution of the carboxylated graphene nanobelts;

[0023] 3. Mix and stir the PBO polymer and methanesulfonic acid for 4 to 24 hours to obtain a PBO solution;

[0024] 4. Mix the carboxylated graphene nanoribbon dispersion obtained in step 2 with the PBO solution obtained in step 3, then stir and react at a temperature of 100°C to 180°C for 12 to 48 hours to obtain a reaction product, and wash the reaction product with water After drying, the obtained graphene nanobelts are grafted to a modified PBO polymer.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment differs from Embodiment 1 in that the mass ratio of phosphorus pentoxide to phosphoric acid in step 1 is 1: (1-2). Others are the same as in the first embodiment.

specific Embodiment approach 4

[0026] Embodiment 4: The difference between this embodiment and Embodiment 1 or 2 is that the mass ratio of carboxylated graphene nanoribbons to polyphosphoric acid solution in step 2 is 1: (50-1000). Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a graphene nanobelt graft modified PBO polymer and a preparation method thereof. The graphene nanobelt graft modified PBO polymer is mainly used for solving the technical problem that the existing PBO fiber is low in tensile strength. The graphene nanobelt graft modified PBO polymer has a structural formula (described in the specification), wherein A is graphene nanobelt, n is between 30 and 100, and s is between 30 and 100. The preparation method of the graphene nanobelt graft modified PBO polymer comprises the following steps: adding carboxylated graphene nanobelt into a polyphosphoric acid solution, and stirring to obtain a carboxylated graphene nanobelt dispersion solution; mixing PBO polymer with methanesulfonic acid and stirring, so as to obtain a PBO solution; mixing the carboxylated graphene nanobelt dispersion solution with the PBO solution, heating for reaction, and washing with water and drying, thus obtaining the graphene nanobelt graft modified PBO polymer. Tensile strength of a fiber prepared by utilizing the graphene nanobelt graft modified PBO polymer is 8-9GPa, so that the graphene nanobelt graft modified PBO polymer can be used for producing heat-resisting textiles or can be used as a fiber reinforcing material.

Description

technical field [0001] The invention relates to a modified PBO polymer and a preparation method thereof. Background technique [0002] The full name of PBO is poly-p-phenylenebenzobisoxazole, which is composed of 4,6-diaminoresorcinol hydrochloride and terephthalic acid as monomers, and polyphosphoric acid as solvent for solution polycondensation, spinning and washing. , dried and obtained. It is a reinforcing material for composite materials developed by the United States in the 1980s for the development of the aerospace industry. It is one of the most promising members of the polyamide family containing heterocyclic aromatics. It is known as the super fiber of the 21st century. . Among the existing chemical fibers, the tensile performance is the highest, not only surpassing steel fibers, but also surpassing carbon fibers. The heat-resistant temperature reaches 600°C, the limiting oxygen index is 68, and it does not burn or shrink in flames, and its heat resistance and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06
Inventor 姜再兴王明强黄玉东刘丽
Owner HARBIN INST OF TECH
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