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Interface-enhancement emulsion type sizing agent used for carbon fibers, and preparation method thereof

An interface enhancement, emulsion type technology, applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve problems such as poor temperature resistance and poor compatibility with epoxy resin systems

Active Publication Date: 2017-11-10
芜湖万隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor temperature resistance of existing sizing agents and poor compatibility with epoxy resin systems, and to provide a kind of interface-reinforced emulsion-type sizing agent for carbon fiber and its preparation method

Method used

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  • Interface-enhancement emulsion type sizing agent used for carbon fibers, and preparation method thereof
  • Interface-enhancement emulsion type sizing agent used for carbon fibers, and preparation method thereof
  • Interface-enhancement emulsion type sizing agent used for carbon fibers, and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a method for preparing an interface-reinforced emulsion-type sizing agent for carbon fibers, the method comprising:

[0034] Step 1: dissolving the polyarylether resin in an organic solvent, stirring it to make it evenly mixed, and obtaining the main slurry; the stirring time is preferably 10 minutes to 30 minutes;

[0035] Step 2: Add emulsifier to the main slurry in Step 1, add coupling agent to deionized water, stir and mix evenly to obtain modified deionized water; the stirring time is preferably 5 minutes to 10 minutes;

[0036] 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 Uniform, that is, to obtain an interface-reinforced emulsion-type sizing agent for carbon fibers; the dropping rate is preferably 0.01ml / s-1ml / s, and the stirring time is...

Embodiment 1

[0039] The polyaryletherketone resin PEK-CH (the number average molecular weight is 1.0×10 4g / mol) was dissolved in chloroform and stirred for 15 minutes to obtain the main slurry, then sodium dodecylsulfonate was added and stirred for 5 minutes to dissolve it.

[0040] Add KH-550 into deionized water and stir for 5 minutes to make it evenly mixed to obtain modified deionized water;

[0041] Select a high-speed shear emulsifier, slowly add modified deionized water to the main slurry at 10000rpm, the dropping speed is 0.02ml / s, after the phase is reversed, the stirring speed is increased to 15000rpm, and the dropping speed is 1ml / s, and after the completion, the Continue to stir for 60 minutes to obtain an emulsion type sizing agent.

[0042] PEK-CH and CCl in the main slurry 3 The mass ratio of sodium dodecylbenzene sulfonate and KH-550 are 10% and 6% of the main slurry respectively, and the mass ratio of deionized water to the main slurry is 80:20.

[0043] The structural ...

Embodiment 2

[0047] Polyaryletherketone resin PPLK (the number average molecular weight is 8.0×10 3 g / mol) was dissolved in N,N-dimethylacetamide and stirred for 15 minutes to obtain the main slurry, then EL-40 was added and stirred for 5 minutes to dissolve it.

[0048] Add KH-560 into deionized water and stir for 5 minutes to make it evenly mixed to obtain modified deionized water;

[0049] Select a high-speed shear emulsifier, slowly add the modified deionized water to the main slurry at 7000rpm, the dropping speed is 0.03ml / s, after the phase is reversed, the stirring speed is increased to 15000rpm, and the dropping speed is 1ml / s, and after the completion, under 10000rpm Continue to stir for 60 minutes to obtain an emulsion type sizing agent.

[0050] The mass ratio of PPLK and DMAC in the main slurry is 20:80, EL-40 and KH-560 are 8% and 4% of the main slurry mass respectively. The mass ratio of deionized water to main slurry is 70:30. The structural formula of the PPLK is as foll...

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Abstract

The invention provides an interface-enhancement emulsion type sizing agent used for carbon fibers, and a preparation method thereof, and belongs to the technical field of carbon fiber sizing agents. The sizing agent comprises a main slurry, an emulsifier, a coupling agent and deionized water, the main slurry comprises polyaryletherketone resin and an organic solvent according to a mass percentage ratio of (5-30):(70-95), the mass of the emulsifier is 5-20% of the mass of the main slurry, the mass of the coupling agent is 1-10% of the mass of the main slurry, and a mass percentage ratio of the deionized water to the main slurry is (60-90):(10-40). The polyaryletherketone resin having a high heat stability is used as the main component to prepare the emulsion type sizing agent for carbon fibers, so the temperature tolerance problem of the sizing agent is solved; and the polyaryletherketone resin has good compatibility with epoxy resin, and can participate in the curing reaction of the epoxy resin, so the bonding performance of the epoxy resin and the fibers is greatly improved, thereby the interlace shearing strength of a composite material is improved.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber sizing agents, in particular to an interface-reinforced emulsion-type sizing agent for carbon fibers and a preparation method thereof. Background technique [0002] Carbon fiber is the most important reinforcing material for advanced composite materials. It has excellent properties such as high specific strength, high specific modulus, high temperature resistance and corrosion resistance, and has been widely used in various fields of military and civilian industries. However, 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 order to improve the strength and post-processing performance of carbon fiber, it is necessary to sizing the surface of carbon fiber. The sizing agent forms a layer of protective glue on the surface of the fiber, which bundles the fiber and improves t...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K9/06C08K7/06C08L63/00D06M15/53D06M13/513D06M13/256D06M101/40
CPCC08K7/06C08K9/04C08K9/06C08K9/08C08L63/00C08L2201/08D06M13/256D06M13/513D06M13/5135D06M15/53D06M2101/40D06M2200/40C08L71/00
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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