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Emulsion carbon fiber sizing agent and preparation method and application thereof

An emulsion-type carbon fiber and carbon fiber technology, which is applied in the fields of carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of poor storage and use stability of carbon fiber sizing agents, low interlayer shear strength, etc., and achieve interlayer shear Effect of increased strength, improved storage stability, and high overall performance

Active Publication Date: 2015-06-10
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defect that the interlaminar shear strength of the carbon fiber composite material made with the existing carbon fiber sizing agent is small, and overcome the problem of poor storage and use stability of the existing carbon fiber sizing agent, the primary purpose of the present invention is to provide An emulsion type carbon fiber sizing agent, the sizing agent of the present invention can greatly improve the interlaminar shear strength of carbon fiber composite materials, and ensure that the carbon fiber composite materials have higher overall performance; and the sizing agent of the present invention can be stored and used There will be no emulsion stratification and uneven distribution of emulsion concentration during the process, and it can be stirred relatively quickly during use and transportation, which is convenient to use

Method used

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  • Emulsion carbon fiber sizing agent and preparation method and application thereof
  • Emulsion carbon fiber sizing agent and preparation method and application thereof
  • Emulsion carbon fiber sizing agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A sizing agent for emulsion carbon fibers is prepared by the following steps:

[0041] Add 0.5g of surfactant (Japan Emulsifier Company / Nikon 707-SF) into 96.4g of deionized water, stir appropriately to make it evenly mixed; then add 2g of bisphenol A epoxy resin and 1g of p-benzene Diethyl dicarboxylate, stir at 1000r / min at 40℃ for 100min; then at 40℃ at 10000r / min high-speed shear emulsification for 35min; finally add 0.1g of ammonium chloride, at 40℃ Stir at 1000r / min for 25min to obtain a sizing agent for emulsion carbon fiber.

[0042] The structure of the surfactant is as follows:

[0043]

[0044] Japan Emulsifier Company / Nikon 707-SF

Embodiment 2

[0046] A sizing agent for emulsion carbon fibers is prepared by the following steps:

[0047] (1) Add 2.5g of diphenyl sulfone to 2.5g of ethanol, stir appropriately at 40°C to dissolve it for later use;

[0048] (2) Add 1.5g of surfactant (0.75g of Mitsubishi Rayon / BPEO20SON, 0.75g of Mitsubishi Rayon / SPEO120SON) into 90.7g of deionized water, stir appropriately to make it evenly mixed; then add 5g of bisphenol F-type epoxy resin, 2.5g of diethyl terephthalate, stir at 750r / min at 60℃ for 80min; then at 60℃ at 7500r / min for high-speed shear emulsification for 25min; finally add 0.3 g of ammonium chloride is stirred at 750r / min for 20min at 60°C to obtain a sizing agent for emulsion carbon fiber.

[0049] The structure of the surfactant is as follows:

[0050]

[0051] Mitsubishi Rayon Corporation / BPEO20SON

[0052]

[0053] Mitsubishi Rayon Corporation / SPEO120SON

Embodiment 3

[0055] A sizing agent for emulsion carbon fibers is prepared by the following steps:

[0056] (1) Add 2.5g of diphenyl sulfone to 2.5g of ethanol, stir appropriately at 40°C to dissolve it for later use;

[0057] (2) Add 3.5g of surfactant (1.5g polyoxyethylene alkyl ether, 2.0g polyoxyethylene alkyl phenyl ether) into 80.9g deionized water, stir appropriately to make it evenly mixed; then add 10g phenolic aldehyde Epoxy resin, 5g of diethyl terephthalate, stir at 500r / min at 60℃ for 60min; then at 60℃ at 5000r / min for high-speed shear emulsification for 15min; finally add 0.6g of chlorine The ammonium hydroxide is stirred at a speed of 500r / min for 15 minutes at 60°C to obtain a sizing agent for emulsion carbon fiber.

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Abstract

The invention discloses an emulsion carbon fiber sizing agent and a preparation method and application thereof. The sizing agent is prepared from 2%-40% of epoxy resin, 1%-20% of modifier, 0-96.4% of water, 0.5%-15% of surfactant and 0.1%-2.0% of inorganic ammonium salt. The sizing agent contains the modifier which has similar or same structure units with matrix resin in a carbon fiber composite, so that strong interface bonding force is applied between carbon fibers and a sizing agent layer and between the sizing agent layer and the thermoplastic matrix resin; the carbon fibers are effectively combined with the thermoplastic matrix resin through the sizing agent transition connection layer to form an organic whole; and by virtue of a synergistic effect of a stabilizer ammonium chloride, the interlaminar shear strength of the organic whole is improved by 30% compared with an existing carbon fiber composite, and the whole performance of the carbon fiber composite provided by the invention is high. By virtue of the stabilizer ammonium chloride, the storage stability of the sizing agent is greatly improved, and the phenomena of layering and demulsification in a use process of the sizing agent are avoided.

Description

Technical field [0001] The invention belongs to the field of carbon fiber production, and specifically relates to a sizing agent for emulsion type carbon fibers, and a preparation method and application thereof. Background technique [0002] In the carbon fiber reinforced composite material, a sizing agent is used as a transition layer between the carbon fiber used for reinforcement and the matrix resin. The sizing agent can not only connect the carbon fiber well, but also connect the matrix resin well, making the carbon fiber reinforced composite material a Overall, it has a strong overall performance. [0003] Patent CN1318686C discloses a sizing agent for carbon fibers. The sizing agent for carbon fibers contains (A) a compound with at least one epoxy group in the molecule, (B) an anionic surfactant with ammonium ion as the counter ion, ( C) Non-ionic surface active agent. [0004] However, for the thermoplastic resin composite material (CFRTP) made of carbon fiber sizing with t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55D06M13/224D06M11/13D06M11/56D06M11/65C08L67/02C08L67/03C08K9/04C08K9/02C08K7/06C08K3/04D06M101/40
Inventor 雷震黄险波蔡彤旻宋威黄有平谢怀玉
Owner KINGFA SCI & TECH CO LTD