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

An emulsion-type carbon fiber and carbon fiber technology, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of adverse effects on the overall performance of carbon fiber and its composite materials, inconvenient production of carbon fiber, and inability to process carbon fiber, etc., to achieve enhanced storage stability and the effect of using the stability

Active Publication Date: 2014-04-09
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the composite material made of carbon fiber after sizing with the above-mentioned carbon fiber sizing agent has a brittle effect after curing as the epoxy resin contained in the sizing agent of the transitional connection layer, which affects the effective combination of carbon fiber and matrix resin. The interlaminar shear strength of the carbon fiber epoxy resin matrix composite material is small, which has a great adverse effect on the overall performance of the carbon fiber composite material.
Moreover, 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 emulsion concentration, and even premature demulsification, flocculation, agglomeration, etc., occur in the sizing agent. Layers, sinking, turbidity, etc., carbon fiber sizing cannot be carried out, and rapid stirring cannot be carried out during use and transportation, which brings great inconvenience to carbon fiber production and affects the overall performance of carbon fiber and its composite materials. also have a great adverse effect on

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] An emulsion type carbon fiber sizing agent is prepared by the following steps:

[0043] Add 0.5g of surfactant (Japan Emulsifier Company / Nikon 707-SF) into 97g of deionized water, stir properly to mix evenly; then add 2g of bisphenol A epoxy resin, 0.3g of cardanol , 0.1g formaldehyde, stirred at 1000r / min at 40°C for 100min; then at 40°C at 10,000r / min for high-speed shear emulsification for 35min; finally added 0.1g of ammonium chloride, at 40°C at 1000rr Stir at a speed of 1 / min for 25 minutes to obtain a sizing agent for emulsion-type carbon fibers.

[0044] The structure of a surfactant is shown below:

[0045]

[0046] Nippon Emulsifier Company / Nikon 707-SF

Embodiment 2

[0048]A sizing agent for emulsion type carbon fiber is prepared by the following steps:

[0049] Add 1.5g of surfactant (0.75g Mitsubishi Rayon Company / BPEO20SON, 0.75g Mitsubishi Rayon Company / SPEO120SON) into 92.2g deionized water, stir properly to make it evenly mixed; then add 5g of bisphenol F type Epoxy resin, 0.9g cardanol, and 0.1g formaldehyde were stirred at 60°C for 80min at a speed of 750r / min; then emulsified at a high speed of 7500r / min at 60°C for 25min; finally, 0.3g of chlorinated Ammonium was stirred at 750 r / min for 20 min at 60° C. to obtain a sizing agent for emulsion type carbon fiber.

[0050] The structure of surfactants is shown below:

[0051]

[0052] Mitsubishi Rayon Corporation / BPEO20SON

[0053]

[0054] Mitsubishi Rayon Corporation / SPEO120SON

Embodiment 3

[0056] A sizing agent for emulsion type carbon fiber is prepared by the following steps:

[0057] Add 4.0g of surfactant (2.0g of polyoxyethylene alkyl ether, 2.0g of polyoxyethylene alkyl phenyl ether) to 83.2g of deionized water, stir properly to make it evenly mixed; then add 10g of phenolic epoxy resin Resin, 2.0g cardanol, and 0.2g formaldehyde were stirred at 60°C for 60min at a speed of 500r / min; then emulsified at a high speed of 5000r / min at 60°C for 15min; finally, 0.6g of ammonium chloride was added, The sizing agent for emulsion type carbon fiber was obtained by stirring at 500 r / min for 15 min at 60°C.

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Abstract

The invention discloses an emulsion type sizing agent for a carbon fiber as well as a preparation method and application of the emulsion type sizing agent. The sizing agent contains 2-40 percent of epoxy resin, 0-97 percent of water, 0.5-14 percent of surfactant, 0.3-12.5 percent of cardanol, 0.1-1.5 percent of formaldehyde and 0.1-2.0 percent of inorganic ammonium salts. The emulsion type sizing agent contains the cardanol and the formaldehyde as toughening and modifying agents, so that when the carbon fiber sized by using the emulsion type sizing agent for the carbon fiber is compounded with an epoxide resin matrix taking polyamine as a curing agent to form a composite material, the interlaminar shear strength is improved by over 30 percent and the carbon fiber composite material is enabled to have higher integral performance. The emulsion type sizing agent contains the inorganic ammonium salts, so that the storage stability of the sizing agent is greatly improved and the phenomena of demixing and non-uniformity of concentration are avoided. According to the emulsion type sizing agent disclosed by the invention, the phenomena of demixing and emulsion breaking in the use process of the sizing agent are avoided. After the carbon fiber sized by the sizing agent disclosed by the invention is stored at normal temperature for five years, the mass percentage of the sizing agent on the surface of the carbon fiber is unchanged.

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 a preparation method and application thereof. 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 fibers, the sizing agent for carbon fibers 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 composite material made of carbon fiber after sizing with the above-mentioned carbon fiber sizing agent has a brittle effect after curin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55D06M15/41D06M15/423D06M11/13D06M11/55D06M11/65D06M101/40
Inventor 雷震宋威蔡彤旻黄险波黄有平宁凯军
Owner KINGFA SCI & TECH CO LTD