Polyphenylene sulfide linear oligomer grafted modified carbon fiber as well as preparation method and application thereof

A polyphenylene sulfide and graft modification technology, which is applied in the fields of carbon fiber, fiber processing, textile and paper making, etc., can solve the problems of production waste and difficult to use effectively, improve compatibility, and realize high-value reuse. , the effect of improving the comprehensive mechanical properties

Pending Publication Date: 2022-04-12
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] In addition, polyphenylene sulfide linear oligomers (LPS oligomers) are usually produced in the industrial field of polyphenylene sulfide production, and these oligomer wastes are difficult to effectively utilize, resulting in waste in production

Method used

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  • Polyphenylene sulfide linear oligomer grafted modified carbon fiber as well as preparation method and application thereof

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Embodiment 1

[0035] At 100 °C, 100 g of commercial CF was refluxed with acetone for 48 h to remove the surface sizing agent. The desizing CF was oxidized with 3000 mL of 65wt% concentrated nitric acid for 4 h, and active groups such as -OH and -COOH were introduced on the surface of CF, washed and dried in vacuum to obtain surface oxidized carbon fibers (CFO).

[0036] The CFO fiber tow is put into the round-bottomed flask, and 5000 g of MPTES (methacryloyloxypropyl tris(trimethylsiloxane) silane) solution (concentration is 0.05 g / mL) is added to the above-mentioned solution. The reaction device was adjusted to pH 5-6 with glacial acetic acid, left to stand at 30° C. for 1 hour, washed and dried in vacuum to obtain carbon fiber (CFO-MPTES) grafted on the surface of MTPES.

[0037] Using acetone (also tetrahydrofuran, chloroform, acetonitrile, dimethylformamide, etc.) as a solvent to prepare a LPS solution with a concentration of 0.01g / mL, CFO-MPTES, 2g catalyst 2,2-dimethoxy-2- Phenylacet...

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Abstract

The invention discloses a polyphenylene sulfide linear oligomer grafted modified carbon fiber and a preparation method and application thereof.The preparation method comprises the steps that a silane coupling agent with C = C unsaturated double bonds is adopted for treating the surface of the carbon fiber, the unsaturated C = C double bonds are introduced into the surface of the carbon fiber, and further based on a sulfydryl-alkene click chemical reaction, the surface of the carbon fiber is modified, and the polyphenylene sulfide linear oligomer grafted modified carbon fiber is obtained. The method comprises the following steps: grafting a sulfydryl-containing LPS oligomer with a specific molecular weight to the surface of CF; the preparation method has the advantages of simplicity, high efficiency, rapidness, high selectivity, simple post-treatment and the like. On the basis of a'thiol-ene 'click chemical reaction, the polyphenylene sulfide linear oligomer (LPS) byproduct waste with a thiol end group (-SH) in the PPS industry is grafted to the surface of the carbon fiber, so that the interfacial compatibility between a polyphenylene sulfide (PPS) resin matrix and the carbon fiber is effectively improved, the interfacial adhesive property is obviously improved, and the mechanical property is improved. And meanwhile, the problem of high-value recycling of the PPS industrial oligomer waste is solved.

Description

technical field [0001] The invention relates to the technical field of modified carbon fiber materials, in particular to a polyphenylene sulfide linear oligomer graft modified carbon fiber and a preparation method and application thereof. Background technique [0002] In order to solve the interface problem of CF / PPS (carbon fiber / polyphenylene sulfide) composites, carbon fibers are usually treated with sizing agents in commercial production. However, the current commercial carbon fiber sizing agents are mainly developed for thermosetting matrices such as epoxy resins, which are not compatible with PPS resin matrices. Moreover, in these commercial thermosetting sizing agents, the thermal stability is poor, and at the processing temperature of CF / PPS composites, decomposition occurs, further weakening the interfacial properties of the composites. The chemical graft modification method is also a common method for surface and interface modification of composite materials, whil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/63D06M13/513D06M11/64C08J5/06C08L81/02C08K9/04C08K7/06D06M101/40
Inventor 徐海兵祝颖丹邢开
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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