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Preparation method and application of water-soluble carbon fiber sizing agent

A carbon fiber and water-soluble technology, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of unsatisfactory hydrophilicity and dispersibility of carbon fiber, unfavorable dispersibility of carbon fiber, and low surface energy of carbon fiber, so as to facilitate the mixing of pulp Effect of sizing, improving hydrophilicity and dispersibility, and good smoothness

Inactive Publication Date: 2015-10-07
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, research on various aspects of carbon fiber in China is mainly focused on composite materials. Carbon fiber sizing agents are also based on protecting the surface of carbon fibers to improve compatibility with matrix resins, but the hydrophilicity and dispersibility of carbon fibers are very poor. ideal
Carbon fibers without surface treatment and sizing have low surface energy, poor hydrophilicity, and are inconvenient to use; although the surface energy of carbon fibers after surface treatment has been improved and the hydrophilicity has been improved, they are not sized due to a large amount of hair. Silk also affects transportation and use; general-purpose sizing agents are unfavorable to the dispersibility of carbon fibers, and are not suitable for water treatment and other aspects that require good dispersibility of carbon fibers
[0003] The carbon fiber currently used in water treatment in my country is maintained by imports, and the cost is very high, which also greatly limits the market for carbon fiber in the direction of water treatment in my country

Method used

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  • Preparation method and application of water-soluble carbon fiber sizing agent
  • Preparation method and application of water-soluble carbon fiber sizing agent
  • Preparation method and application of water-soluble carbon fiber sizing agent

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0019] Embodiment 1: A carbon fiber sizing agent, which is made of polyethyleneimine, high molecular weight polyethylene glycol ester compound, SOPE-10 standard emulsifier and ethanol aqueous solution, with a weight ratio of 25:0.5 :0.5:74. When making, first add 25 parts of polyethyleneimine to 74 parts of ethanol aqueous solution at 60-70 ° C, stir to dissolve it completely, and then add 0.5 parts of high molecular weight polyethylene glycol ester compound Add 0.5 parts of SOPE-10 emulsifier into the above solution, stir and dissolve to form an integrated solution to obtain a water-soluble carbon fiber sizing agent.

[0020] The weight fraction of the carbon fiber after sizing with this sizing agent is 3.88%; through the contact angle test, the contact angle between the carbon fiber and water after sizing is reduced by 20% compared with that before sizing, and the hydrophilicity is improved; the carbon fiber after sizing Disperses after about 10 seconds after immersion in w...

specific Embodiment approach 2

[0021] Specific embodiment two: a kind of carbon fiber sizing agent, it is made by the mixture of carboxymethylcellulose and polyvinylpyridine, polyacrylic acid ester modified by acid group, SOPE-7 standard emulsifier, ethanol aqueous solution, The weight ratio is 15:0.5:0.5:84. When making, first add 15 parts of carboxymethylcellulose and polyvinylpyridine mixture into 40 parts of ethanol aqueous solution at 70-80 ° C, stir to dissolve it completely, then add 44 parts of remaining ethanol aqueous solution, adjust the temperature to 30-50°C; then add 0.5 parts of acid group-modified polyacrylate and 0.5 parts of SOPE-7 emulsifier into the above solution, stir and dissolve to form an integrated solution, and obtain a water-soluble carbon fiber Sizing agent.

[0022] The weight fraction of the carbon fiber after sizing with this sizing agent is 1.96%; through the contact angle test, the contact angle between the carbon fiber and water after sizing is reduced by 27% compared wit...

specific Embodiment approach 3

[0023] Specific embodiment three: a kind of carbon fiber sizing agent, it is made by the mixture of polyethyleneimine and vinyl acetate, polyacrylic acid sodium salt, the emulsifier of SOPE-15 specification, deionized water, and the weight ratio is 6: 0.3:0.2:94. When making it, first add the mixture of 6 parts of polyethyleneimine and vinyl acetate to 94 parts of deionized water at 80-100 ° C, stir to dissolve it completely, and then add 0.3 parts of polyacrylic acid sodium salt Add 0.2 parts of SOPE-15 emulsifier into the above solution, stir and dissolve to form an integrated solution to obtain a water-soluble carbon fiber sizing agent.

[0024] The weight fraction of the carbon fiber after sizing with this sizing agent is 1.86%; through the contact angle test, the contact angle between the carbon fiber and water after sizing is reduced by 30% compared with that before sizing, and the hydrophilicity is improved; the carbon fiber after sizing Disperses after about 2 seconds...

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Abstract

The invention discloses a preparation method and application of a water-soluble carbon fiber sizing agent. The water-soluble carbon fiber sizing agent is prepared from the following components in parts by weight: 5-45 parts of a water-soluble polymer, 0.01-1.2 parts of a dispersing agent, 0.08-2 parts of an emulsifying agent, and 62-95 parts of a solvent, wherein the water-soluble polymer is characterized in that a large number of active functional groups exist in molecules. The preparation method comprises the following steps: under temperature of 60-100 DEG C, adding the water-soluble polymer into the solvent, stirring so that the water-soluble polymer can be completely dissolved, adjusting to the proper temperature, adding the dispersing agent and the emulsifying agent into the solution, stirring for dissolving to obtain an integrated solution which is the water-soluble carbon fiber sizing agent. According to the invention, all the raw materials are non-toxic and easily available, are convenient for pulp mixing and sizing, and have good protection effect on carbon fibers; after the carbon fibers are treated by adopting the water-soluble carbon fiber sizing agent, the surfaces of the carbon fibers contain a large number of hydrophilic functional groups, so that the hydrophily and the dispersibility of the surfaces of the carbon fibers can be effectively improved, the carbon fibers can be well adapted to water treatment and other aspects having requirements for good dispersibility of the carbon fibers.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber sizing agents, and in particular relates to a preparation method and application of a water-soluble carbon fiber sizing agent. Background technique [0002] Carbon fiber has high strength and modulus, small filament diameter, large specific surface area, and does not rust, mildew, or rot in water, and has affinity with microorganisms. It is a good material for restoring the ecological environment of polluted water. At present, research on various aspects of carbon fiber in China is mainly focused on composite materials. Carbon fiber sizing agents are also based on protecting the surface of carbon fibers to improve compatibility with matrix resins, but the hydrophilicity and dispersibility of carbon fibers are very poor. ideal. Carbon fibers without surface treatment and sizing have low surface energy, poor hydrophilicity, and are inconvenient to use; although the surface energy of carbon fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/61D06M15/333D06M15/263D06M15/09D06M15/356D06M101/40
Inventor 刘杰安永真梁节英
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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