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Graphene nanoribbon interface-modified PBO (polyparaphenylene benzobisoxazole) fiber and preparation method thereof

A technology of graphene nanobelts and fibers, applied in fiber processing, fiber types, textiles and papermaking, etc., can solve the problems of large reduction in tensile strength, achieve the improvement of interfacial shear strength, improve interfacial shear strength, size uniform effect

Active Publication Date: 2016-08-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the current modification method of PBO fiber makes the tensile strength of PBO fiber body decrease greatly, and provides a graphene nanoribbon interface modified PBO fiber and its preparation method

Method used

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  • Graphene nanoribbon interface-modified PBO (polyparaphenylene benzobisoxazole) fiber and preparation method thereof
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  • Graphene nanoribbon interface-modified PBO (polyparaphenylene benzobisoxazole) fiber and preparation method thereof

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specific Embodiment approach 1

[0025] Specific embodiment one: the structure of the graphene nanoribbon interface modification PBO fiber of the present embodiment is as follows:

[0026]

specific Embodiment approach 2

[0027] Specific embodiment two: the preparation method of the graphene nanoribbon interface modification PBO fiber of the present embodiment, carry out according to the following steps:

[0028] 1. Preparation of graphene nanoribbons:

[0029] Put the multi-walled carbon nanotubes into a reactor containing a mixed solution of concentrated sulfuric acid and phosphoric acid, add potassium permanganate, and stir and react for 1 to 5 hours at a temperature of 25 to 60°C; then raise the temperature to 70 ~75°C, stirring and reacting for 1-1.5 hours, pour the contents of the reactor into the ice-water mixture, add hydrogen peroxide to remove unreacted potassium permanganate, then wash with hydrochloric acid, and wash with deionized water until medium properties, the solid phase is filtered out, and vacuum-dried to obtain graphene nanobelts;

[0030] Second, the treatment of carboxylation of graphene nanoribbons:

[0031] Add the graphene nanoribbons obtained in step 1 into the ble...

specific Embodiment approach 3

[0038] Specific embodiment three: the difference between this embodiment and specific embodiment two is that in the mixed solution of concentrated sulfuric acid and phosphoric acid in step one, the concentrated sulfuric acid with a mass percentage concentration of 98% and the phosphoric acid with a mass percentage concentration of 85% are pressed The volume ratio is (9-10): 1; the other is the same as the second embodiment.

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Abstract

The invention relates to a modification method of a PBO (polyparaphenylene benzobisoxazole) fiber, in particular to a graphene nanoribbon interface-modified PBO fiber and a preparation method thereof, aiming at solving the problem that the existing modification method of the PBO fiber enables the tensile strength of a PBO fiber body to be greatly reduced. The structure of the graphene nanoribbon interface-modified PBO fiber is described in the description. The preparation method comprises the steps of 1, preparing a graphene nanoribbon; 2, treating the graphene nanoribbon by carboxylation; 3, treating the surface of PBO by carboxylation; 4, using the carboxylic graphene nanoribbon interface-modified PBO fiber to obtain the graphene nanoribbon interface-modified PBO fiber. Compared with the untreated PBO fiber, the tensile strength of the modified PBO fiber is only reduced by 5-10 percent; compared with an epoxy resin composite material prepared by the unmodified PBO fiber, the interfacial shear strength of an epoxy resin composite material prepared by the modified PBO fiber is improved by 20-41 percent. The graphene nanoribbon interface-modified PBO fiber can be taken as a reinforcing material for preparing composite materials.

Description

technical field [0001] The invention relates to a modified PBO fiber 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 has the highest tensile performance among existing chemical fibers, not only surpassing steel fibers, but also surpassing aramid fibers. The heat-resistant temperature reaches 650°C, the limiting oxygen index is 68, and it does not burn or shrink in flames, and its heat resistance and flame retardancy are higher than any other organic fibers. Both are excellent in dimensional stability, and are light and soft. Due to these excellent comprehens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74D06M11/64C08G83/00D06M101/30
CPCC08G83/001D06M11/64D06M11/74D06M2101/30
Inventor 姜再兴王明强董继东方元韦华伟谢华权毛娇宋元军黄玉东
Owner HARBIN INST OF TECH
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