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Amphiphilic carbon fiber and preparation method thereof

A technology of amphiphilic carbon and carbon fiber, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of unfavorable industrialization, complex reaction equipment, harsh reaction conditions, etc., and achieve the effect of facilitating processing and improving hydrophilicity

Active Publication Date: 2021-06-01
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some liquid-phase oxidations that require hydrothermal reaction. The high-temperature and high-pressure reaction conditions are harsh, which is not conducive to industrialization. Some liquid-phase oxidations require ultrasonic and other conditions, and the reaction equipment is complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027](1) Pretreatment of carbon fibers: Place the carbon fiber in a 2 mol / L sodium hydroxide solution, performing ultrasonic treatment in an ultrasonic condition for 1 hour; the carbon fiber water after the ultrasonic treatment is cleaned, and the water to wash is neutral. Drunk carbon fibers were dried at 130 ° C for 0.5 hours;

[0028](2) Preparation of an oxidant chromic acid solution: According to potassium chromate: water: concentrated sulfuric acid (mass fraction of 95% or more) is 1: 0: 10 mass than formulated chromic acid solution; first, weigh potassium dichromate, Water was added to the proportion, and the potassium titrate was dissolved in water, and concentrated sulfuric acid was added, and the concentrated sulfuric acid was added to the potassium solution.

[0029](3) Carbon fiber oxidation process: The pretreated carbon fiber is added to the chromic acid solution prepared in step (2) at a mass ratio of 1: 400, and the reaction is heated at 100 ° C for 0.5 hours; the carbo...

Embodiment 2

[0033](1) Pretreatment of carbon fibers: Place the carbon fiber in a 3 mol / L sodium hydroxide solution, performing ultrasonic treatment in an ultrasonic condition for 0.5 hours; the carbon fiber water after the ultrasonic treatment is cleaned, and the water is neutral, 120 ° C drying carbon fibers for 1 hour;

[0034](2) Preparation of an oxidant chromic acid solution: According to potassium dichromate: water: concentrated sulfuric acid (mass fraction of 95% or more) is a mass ratio of chromic acid solution by 1:10:60; first, weigh potassium dichromate, Water was added to the proportion, and the potassium titrate was dissolved in water, and concentrated sulfuric acid was added, and the concentrated sulfuric acid was added to the potassium solution.

[0035](3) Carbon fiber oxidation process: The pretreated carbon fiber is added to the chromic acid solution prepared by 1: 200 ratio, and the reaction is heated at 90 ° C for 1 hour; cleaning the above-described carbon fiber The water to wa...

Embodiment 3

[0039](1) Prerequisite of carbon fiber: Place the carbon fiber in a 4 mol / L sodium hydroxide solution, performing ultrasonic treatment in an ultrasonic condition for 0.5 hours; the carbon fiber water in the ultrasound treatment is cleaned, and the water is neutralized. 120 ° C drying carbon fibers for 1 hour;

[0040](2) Preparation of an oxidant chromic acid solution: According to potassium dichromate: water: concentrated sulfuric acid (mass fraction of 95% or more) is a mass ratio of chromic acid solution by 1:10:60; first, weigh potassium dichromate, Water was added to the proportion, and the potassium titrate was dissolved in water, and concentrated sulfuric acid was added, and the concentrated sulfuric acid was added to the potassium solution.

[0041](3) Carbon fiber oxidation process: The pretreated carbon fiber is added to the chromic acid solution prepared by 1: 200 ratio, and the reaction is heated at 90 ° C for 1 hour; cleaning the above-described carbon fiber The water to wa...

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PUM

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Abstract

The invention belongs to the technical field of carbon fiber surface modification, and discloses an amphiphilic carbon fiber and a preparation method. After the carbon fiber is pretreated, an oxidant chromic acid solution is added for heating reaction. After washing with water and drying, the oxidized carbon fiber is added to 8‑ In 12 alkyl alcohols, concentrated sulfuric acid is used as a catalyst for heating reaction, and after the reaction is completed, the carbon fibers are cleaned with an organic solvent and dried to obtain amphiphilic carbon fibers. The present invention obtains carbon fibers with relatively abundant oxygen-containing functional groups on the surface through liquid-phase oxidation treatment, and further through grafting treatment, while retaining hydrophilic hydroxyl groups, introduces lipophilic alkyl chains, and finally obtains both hydrophilic and lipophilic carbon fibers. The hydrophilic carbon fiber is beneficial to the processing of chopped carbon fiber in the process of preparing composite materials.

Description

Technical field[0001]The present invention belongs to the field of carbon fiber surface modification, and in particular, it is a two-person carbon fiber and a preparation method thereof.[0002]technical background[0003]Carbon fibers refer to fibrous materials having a high temperature carbon, containing 90% or more. Carbon fibers are used as a high-performance fiber with high strength, high modulus, thermal stability, good thermal conductivity, good dimensionality, excellent weather resistance. Many composite materials are produced by carbon fibers as enhanced materials, commonly used in military, aerospace navigation projects and senior sporting goods.[0004]In carbon fiber reinforced composites, the short-cut carbon fiber reinforcement is a major way. The short-cut carbon fiber has a diverse feeding method in the preparation of composites, simple process, and strong operability. During the manufacturing process of composite materials, the dispersion of carbon fibers is very importan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/06D06M11/48D06M11/55D06M13/144D06M101/40
CPCD06M10/06D06M11/48D06M11/55D06M13/144D06M2101/40
Inventor 史景利胡蓉蓉彭堃李梦佳王亚丽马昌
Owner TIANJIN POLYTECHNIC UNIV