Emulsion type thermoplastic sizing agent for carbon fiber and preparation method of sizing agent

An emulsion type, thermoplastic technology, applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve the problem of low heat resistance of sizing agent

Active Publication Date: 2017-11-24
芜湖万隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low heat resistance of existing sizing...

Method used

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  • Emulsion type thermoplastic sizing agent for carbon fiber and preparation method of sizing agent
  • Emulsion type thermoplastic sizing agent for carbon fiber and preparation method of sizing agent
  • Emulsion type thermoplastic sizing agent for carbon fiber and preparation method of sizing agent

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preparation example Construction

[0037] The present invention also provides a method for preparing an emulsion-type thermoplastic sizing agent for carbon fibers, the method comprising:

[0038] Step 1: Dissolving the polyarylether resin in an organic solvent, adding an emulsifier, stirring to mix evenly, and obtaining the main slurry; the stirring time is preferably 10 minutes to 30 minutes;

[0039]Step 2: Add the coupling agent into the deionized water, stir and mix evenly to obtain modified deionized water; the stirring time is preferably 5 minutes to 10 minutes;

[0040] Step 3: Select a high-speed shear emulsifier, preferably at 6000rpm-20000rpm, drop the modified deionized water obtained in step 2 into the main slurry in step 1, and continue stirring at a temperature of 30°C-60°C to disperse the system Uniformity means that an emulsion-type thermoplastic sizing agent is obtained; the dropping speed is preferably 0.01ml / s-1ml / s, and the stirring time is preferably 1h-2h.

Embodiment 1

[0043] The sizing agent is calculated by mass fraction, including: PPK-CN: 1.5%, KH-560: 1%, NP-10: 2%, dichloroethane: 7%, deionized water: 88.5%.

[0044] The thermoplastic resin PPK-CN (the number average molecular weight is 8.0×10 3 g / mol) was dissolved in ethylene dichloride, stirred for 15min to make it evenly mixed, then added NP-10, stirred for 5min to obtain the main slurry;

[0045] Add KH560 into deionized water and stir for 5 minutes to make it evenly mixed to obtain modified deionized water;

[0046] Use a high-speed shear emulsifier, slowly add the modified deionized water to the main slurry at 10000rpm, the dropping speed is 0.05ml / s, control the system temperature at 60°C, increase the phase inversion stirring speed to 12000rpm, drop Accelerate at 1ml / s, and continue stirring at 8000rpm for 1h after the dropwise addition to obtain an emulsion-type sizing agent.

[0047] The structural formula of the PPK-CN is as follows:

[0048]

[0049] figure 1 It is ...

Embodiment 2

[0051] The sizing agent is calculated by mass fraction, including: PES-C: 0.8%, KH-402: 0.5%, EL-40: 1%, N,N-dimethylacetamide: 7%, deionized water: 90.7%.

[0052] The thermoplastic resin PES-C (the number average molecular weight is 3.0×10 4 g / mol) was dissolved in N,N-dimethylacetamide, stirred for 15 minutes to make it evenly mixed, then added EL-40, stirred for 5 minutes to obtain the main slurry;

[0053] Add KH-402 into deionized water and stir for 5 minutes to make it evenly mixed to obtain modified deionized water;

[0054] Use a high-speed shear emulsifier, slowly add the modified deionized water into the main slurry at 6000rpm, the dropping speed is 0.03ml / s, control the system temperature at 50°C, increase the phase inversion stirring speed to 15000rpm, drop Accelerate at 1ml / s, and continue stirring at 12000rpm for 1h after the dropwise addition to obtain an emulsion-type sizing agent.

[0055] The structural formula of the PES-C is as follows (n=0; a, b>0):

...

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Abstract

The invention firstly provides an emulsion type thermoplastic sizing agent for carbon fiber and a preparation method of the sizing agent and belongs to the technical field of carbon fiber sizing agents. The sizing agent is prepared from components in percentage by mass as follows: 0.1%-2% of thermoplastic resin, 0.05%-2% of an emulsifier, 0.05%-1% of a coupling agent, 0.4%-8% of an organic solvent and 87.0%-99.4% of deionized water, wherein the thermoplastic resin is polyarylether resin adopting a phenolphthalein structure. The invention further provides the preparation method of the emulsion type thermoplastic sizing agent for the carbon fiber. The emulsion type thermoplastic sizing agent is mainly prepared from the polyarylether resin adopting the phenolphthalein structure and having higher temperature tolerance, the sized carbon fiber can be composited with thermoplastic resin with higher thermal resistance for preparation of a composite, an emulsion is stored stably and dispersed uniformly, and the interface shearing strength of the carbon fiber and the thermoplastic resin is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber sizing agents, in particular to an emulsion-type thermoplastic sizing agent for carbon fibers and a preparation method thereof. Background technique [0002] Carbon fiber-reinforced thermoplastic resin-based composite materials have the characteristics of high specific strength, good impact resistance, corrosion resistance, short molding cycle, and waste recycling. They have developed rapidly in recent years and have been successfully used in high-tech industries such as aerospace, automobiles, and electronics. field. [0003] Carbon fiber is a brittle material, and it is easy to cause monofilament breakage or wool due to friction during processing, which reduces the strength of carbon fiber. In addition, the surface of carbon fiber is inert, and factors such as low surface energy seriously affect the interfacial properties of the fiber and the resin matrix. When an external force is applied...

Claims

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Application Information

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IPC IPC(8): D06M15/53D06M15/63D06M101/40
CPCD06M15/53D06M15/63D06M2101/40D06M2200/40
Inventor 周光远王红华张兴迪杨玉王志鹏
Owner 芜湖万隆新材料有限公司
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