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A kind of temperature-resistant type emulsion sizing agent for carbon fiber and preparation method thereof

A carbon fiber and temperature-resistant technology, which is applied in the field of temperature-resistant emulsion sizing agent for carbon fiber and its preparation, can solve the problems of poor compatibility of epoxy resin systems, poor temperature resistance, etc.

Active Publication Date: 2019-10-18
芜湖万隆新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a temperature-resistant emulsion sizing agent for carbon fiber and its preparation method in order to solve the problems of poor temperature resistance and poor compatibility with epoxy resin systems in existing sizing agents

Method used

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  • A kind of temperature-resistant type emulsion sizing agent for carbon fiber and preparation method thereof
  • A kind of temperature-resistant type emulsion sizing agent for carbon fiber and preparation method thereof
  • A kind of temperature-resistant type emulsion sizing agent for carbon fiber and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a method for preparing a temperature-resistant emulsion 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 and defoamer 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 drop the modified deionized water obtained in Step 2 into the main slurry in Step 1 at 5000rpm-20000rpm, and continue stirring at a temperature of 30°C-60°C to disperse the system Uniformity, that is, to obtain a temperature-resistant emulsion sizing agent for carbon fiber; the dropping speed is preferably 0.01ml / s-1ml / s, and the stirring t...

Embodiment 1

[0039] Polyaryletherketone resin PPLK (the number average molecular weight is 8.0×10 3 g / 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-560 and BYK-028 into deionized water and stir for 5 minutes to make it evenly mixed to obtain modified deionized water;

[0041] Using a high-speed shear emulsifier, slowly add the modified deionized water to the main slurry at 10000rpm at a rate of 0.02ml / s. After the addition, continue stirring at 5000rpm for 60min to obtain an emulsion sizing agent.

[0042] PPLK and CCl in the main slurry 3 The mass ratio is 10:90, sodium dodecylbenzenesulfonate, KH-560, and BYK-028 are respectively 10%, 5%, and 3% of the mass of the main slurry, and the mass ratio of deionized water to the main slurry It is 80:20.

[0043] The structural formula of the PPLK is as follows:

[0044]

[0045] figure 1 The thermal we...

Embodiment 2

[0047] Polyaryletherketone resin PPLK (number average molecular weight is 6.0×10 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 and BYK-028 into deionized water and stir for 5 minutes to make it evenly mixed to obtain modified deionized water;

[0049] A high-speed shear emulsifier was used to slowly add the modified deionized water to the main slurry at 8000rpm at a rate of 0.02ml / s. After the addition was completed, stirring was continued at 5000rpm for 60min to obtain an emulsion sizing agent.

[0050] The mass ratio of PPLK and DMAC in the main slurry is 20:80, EP-40, KH-560, and BYK-028 are 8%, 3%, and 5% of the main slurry respectively, and the deionized water and the main slurry The mass ratio is 70:30.

[0051] The structural formula of the PPLK is as follows:

[0052]

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Abstract

The invention provides a temperature-resistant type emulsion sizing agent for carbon fiber and a preparation method thereof and belongs to the technical field of the sizing agent for the carbon fiber. The sizing agent consists of main size, an emulsifying agent, additives and deionized water, wherein the main size consists of polyaryletherketone resin and an organic solvent with the mass percentage ratio of (5-30):(70-95); the mass of the emulsifying agent is 5%-20% of that of the main size; the additives comprise a coupling agent and a defoaming agent, wherein the mass of the coupling agent is 1%-10% of that of the main size, and the mass of the defoaming agent is 1%-5% of the mass of the main size; and the mass percentage ratio of the deionized water and the main size is (60-90):(10-40). The polyaryletherketone resin has higher heat stability, is good in compatibility with epoxy resin and participates in a curing reaction of the epoxy resin, so that the bonding property of the epoxy resin and fiber can be obviously improved, the toughness of an interface layer is enhanced and further the interlaminar shear strength of the composite material is further improved.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber sizing agents, in particular to a temperature-resistant emulsion sizing agent for carbon fibers and a preparation method thereof. Background technique [0002] Carbon fiber has excellent properties such as high specific strength, high specific modulus, high temperature resistance and corrosion resistance, and is widely used in various fields. However, carbon fiber is a brittle material, and it is easy to cause monofilament breakage or fuzz 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 the processing performance of the carbon fiber. At the same time, it can also improve the wettability of the fiber and the matri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/53D06M101/40
Inventor 周光远张兴迪王红华杨玉王志鹏
Owner 芜湖万隆新材料有限公司
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