Emulsion carbon fiber sizing agent as well as preparation method and application of sizing agent

An emulsion-type carbon fiber and carbon fiber technology, which is applied in fiber processing, textiles and papermaking, etc., to achieve the effects of enhancing storage stability and use stability, enhancing interlayer shear strength, and improving storage stability

Active Publication Date: 2012-12-19
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 shortcomings and deficiencies of the above-mentioned existing carbon fiber sizing agents, the primary purpose of the present invention is to provide an emulsion carbon fiber sizing agent with good storage and use stability, and no emulsion stratification will occur during storage

Method used

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  • Emulsion carbon fiber sizing agent as well as preparation method and application of sizing agent
  • Emulsion carbon fiber sizing agent as well as preparation method and application of sizing agent
  • Emulsion carbon fiber sizing agent as well as preparation method and application of sizing agent

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] An emulsion type carbon fiber sizing agent is prepared by the following steps:

[0040] Combine 2g of bisphenol A epoxy resin, 97g of deionized water and 0.9g of surfactant (0.45g Japan Emulsifier Company / Nikon 707-SF, 0.45g Japan Emulsifier Company / Nikon 723-SF) Mix, stir at 1000r / min at 40℃ for 90min; then at 40℃ at 10000r / min high-speed shear emulsification for 30min; finally add 0.1g of ammonium chloride to the mixture after high-speed shear emulsification , Stir at 1000r / min for 20min at 40℃ to obtain emulsion type carbon fiber sizing agent.

[0041] The structure of the surfactant is as follows:

[0042]

[0043] Japan Emulsifier Company / Nikon 707-SF

[0044]

[0045] Japan Emulsifier Company / Nikon 723-SF

Example Embodiment

[0046] Example 2

[0047] An emulsion type carbon fiber sizing agent is prepared by the following steps:

[0048] Mix 5g of bisphenol F type epoxy resin, 94.3g of deionized water and 0.5g of surfactant (0.25g of Mitsubishi Rayon Corporation / BPEO20SON, 0.25g of Mitsubishi Rayon Corporation / SPEO120SON), and mix them at 60°C. Stir at 750r / min for 70min; then at 60℃ at 7500r / min for high-speed shear emulsification for 20min; finally add 0.2g of ammonium chloride to the mixture after high-speed shear emulsification, and at 60℃ at 750r Stir for 15 minutes at a speed of 1 / min to obtain an emulsion carbon fiber sizing agent.

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

[0050]

[0051] Mitsubishi Rayon Corporation / BPEO20SON

[0052]

[0053] Mitsubishi Rayon Corporation / SPEO120SON

Example Embodiment

[0054] Example 3

[0055] An emulsion type carbon fiber sizing agent is prepared by the following steps:

[0056] Mix 10g of novolac epoxy resin, 86g of deionized water and 3.5g of surfactants (2.0g of polyoxyethylene alkyl ether, 1.5g of polyoxyethylene alkyl phenyl ether) at a temperature of 500r / min at 60°C Stir at the speed of 50 min; then at 60 ℃ at 5000r / min high-speed shear emulsification for 10 min; finally add 0.5g of ammonium chloride to the mixture after high-speed shear emulsification, at 60 ℃ at 500r / min Stir at the rotating speed for 10 minutes to obtain an emulsion carbon fiber sizing agent.

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Abstract

The invention discloses an emulsion carbon fiber sizing agent and a preparation method and application of the sizing agent. The sizing agent comprises the following components by weight percent: 2-50% of epoxy resins, 35-97% of water, 0.5-15% of surfactants and 0.1-2.0% of inorganic ammonium salt. The emulsion carbon fiber sizing agent contains the stabilizing agent inorganic ammonium salt, so the storage stability of the sizing agent is greatly improved compared with the existing sizing agents; the emulsion can still maintain the stable property and layering and uneven concentration distribution can be avoided after the sizing agent is stored for more than three years under normal temperature; after the carbon fiber sized with the sizing agent has been stored for five years under normal temperature, the mass percentage of the sizing agent on the surface of the carbon fiber is not changed; when the sizing agent is used, stirring can be carried out at 200r/min to convey and dilute the sizing agent so that the sizing agent can not generate layering and demulsification; the interlaminar shear strength of carbon fiber composites made of the carbon fibers sized with the sizing agent is enhanced by more than 10% compared with the existing carbon fiber composites; and the mechanical properties of the carbon fiber composites are not obviously changed after the carbon fiber composites are stored for two years under normal temperature.

Description

technical field [0001] The invention belongs to the field of carbon fiber production, and in particular relates to an emulsion type carbon fiber sizing agent and its preparation method and application. Background technique [0002] In carbon fiber reinforced composite materials, a sizing agent is used as a transition layer between the reinforced carbon fiber and the matrix resin. The sizing agent can well connect the carbon fiber and the matrix resin, making the carbon fiber reinforced composite material a Overall, with strong overall performance. [0003] Patent CN1318686C discloses a sizing agent for carbon fiber, which contains: (A) a compound having at least one epoxy group in the molecule, (B) an anionic surfactant with ammonium ions as counter ions, ( C) Nonionic surfactants. [0004] However, the storage and use stability of the above-mentioned carbon fiber sizing agent is relatively poor. During storage and use, emulsion stratification, uneven distribution of emuls...

Claims

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Application Information

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IPC IPC(8): D06M15/55D06M11/13D06M11/55D06M11/65C08K9/04C08K7/06C08K3/04C08L101/00
Inventor 雷震宋威黄险波曾祥斌蔡彤旻辛伟马雷
Owner KINGFA SCI & TECH CO LTD
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