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A kind of water-soluble sizing agent composition for carbon fiber and preparation method thereof

A water-soluble, carbon fiber technology, applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve the gap, still need dozens of minutes to more than an hour and other problems, to achieve good compatibility, low price, good toughness effect

Inactive Publication Date: 2017-12-26
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, after in-depth and meticulous research, we found that the dissolution time of the carbon fiber treated with the above-mentioned sizing agent in the water body still takes tens of minutes to more than an hour, which is still significantly different from the dissolution time of imported products which is a few minutes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1. Preparation of liquid A:

[0033] Weigh 8.08g of starch and disperse in 50mL of water with stirring, dissolve into a homogeneous sol at 75-80°C, add 0.24mL of 30%H 2 o 2 , 1.6mL 10%NaOH, stirred and reacted in 75~80℃ oil bath for 1h; then added 2.4mL 10%NaOH, continued to stir and reacted at 75~80℃ for 0.5h, after cooling, adjusted the pH value to 7 with 10%HCl , to obtain liquid A.

[0034] Step 2. Preparation of liquid B:

[0035] 1.0521 g of isomaltooligosaccharide, 1.02 g of glycerol and 2 g of CAB-35 were added to 100 mL of water.

[0036] Step 3. Prepare sizing agent

[0037] The above liquids A and B were mixed and stirred for 0.5h.

[0038] Sizing and effect test: Immerse the carbon fiber sample that has not been sized or the sizing agent has been removed in the prepared sizing agent for 3~5 minutes, take it out and dry it. The obtained carbon fibers had good bundling properties and smoothness, and when put into still tap water, the fiber bundles w...

Embodiment 2

[0040] Step 1 The preparation of liquid A is the same as in Example 1.

[0041]Step 2. Preparation of liquid B:

[0042] 1.0521 g of isomaltooligosaccharide, 1.02 g of glycerin and 2 g of BS-12 were added to 100 mL of water.

[0043] The above liquids A and B were mixed and stirred for 0.5h.

[0044] Sizing and effect test: Immerse the carbon fiber sample that has not been sized or the sizing agent has been removed in the prepared sizing agent for 3 to 5 minutes, take it out and dry it. The obtained carbon fibers had good bundleability and smoothness, and when put into still tap water, the fiber bundles were completely dispersed within 2 minutes.

Embodiment 3

[0046] Step 1 The preparation of liquid A is the same as in Example 1.

[0047] Step 2. Preparation of liquid B

[0048] 1.0521 g of isomaltooligosaccharide, 1.02 g of glycerin and 8 g of BS-12 were added to 100 mL of water.

[0049] The above liquids A and B were mixed and stirred for 0.5h.

[0050] Sizing and effect test: Immerse the carbon fiber sample that has not been sized or the sizing agent has been removed in the prepared sizing agent for 3 to 5 minutes, take it out and dry it. The obtained carbon fibers had good bundleability and smoothness, and when put into still tap water, the fiber bundles were completely dispersed within 40 seconds.

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Abstract

The invention discloses a water-soluble sizing agent composition for carbon fibers. The water-soluble sizing agent composition is prepared from the following raw materials in percentage by weight: 2.5 to 6 percent of oxidized starch, 0.25 to 2 percent of isomaltooligosaccharide, 0.25 to 2 percent of glycerinum, 1 to 6 percent of lauryl betaine or cocoamidopropyl betaine and 84 to 96 percent of water. According to the composition disclosed by the invention, the raw materials are low in price and are easily-obtained, and a preparation process is simple and environment-friendly; an existing carbon fiber sizing process can be adopted, and secondary pollution to the environment is avoided; the carbon fibers using the sizing agent have good bundling property and smoothness; after being placed into water, the composition can be dissolved within dozen seconds to several minutes. The composition is a green and environment-friendly sizing agent for water treatment of the carbon fibers.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a water-soluble sizing agent composition for carbon fibers and a preparation method thereof. Background technique [0002] Carbon fiber is an inorganic polymer fiber with a carbon content higher than 90%. Carbon fiber can be made of polyacrylonitrile (PAN), viscose-based carbon fiber, pitch fiber and phenolic resin-based carbon fiber through a series of carbonization and graphitization processes. The most widely used is polyacrylonitrile carbon fiber. Polyacrylonitrile carbon fiber usually refers to a synthetic fiber prepared by wet spinning or dry spinning with a copolymer of more than 85% acrylonitrile and the second and third monomers. The fibers obtained by spinning copolymers with acrylonitrile content between 35% and 85% are called modified polyacrylonitrile fibers. In the process of carbon fiber processing and production, in order to improve the strength of carbon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/11D06M15/03D06M13/148D06M101/40
CPCD06M13/148D06M15/03D06M15/11D06M2101/40D06M2200/40
Inventor 刘芝兰栾杰王磊李兰
Owner WUHAN UNIV
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