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A kind of water-based self-emulsifying carbon fiber sizing agent suitable for thermoplastic resin and preparation method thereof

A thermoplastic resin, self-emulsification technology, applied in carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of difficulty in fully exerting the mechanical properties of carbon fiber reinforcement, low interface bonding strength, poor matching, etc., to achieve low cost and high performance The effect of stabilization and improvement of bond strength

Inactive Publication Date: 2019-01-08
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, commercialized sizing agents are mostly epoxy resin-based emulsion sizing agents, which have poor compatibility with thermoplastic resin matrices, resulting in low interfacial bonding strength between carbon fiber and thermoplastic resin matrices, making it difficult to give full play to the mechanical properties of carbon fiber reinforcements.

Method used

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  • A kind of water-based self-emulsifying carbon fiber sizing agent suitable for thermoplastic resin and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Synthesis of maleic anhydride-dodecene random copolymer (polymer A1): under nitrogen protection conditions, first dissolve 0.12mol maleic anhydride in 100mL xylene and add it to a three-necked reaction flask, stir and heat up to 80°C, then add 0.2mol of dodecene, stirred for a period of time at constant temperature, added an appropriate amount of initiator benzoyl peroxide (BPO), heated to 120 o C. React at constant temperature for 1.5 hours. After the reaction is stopped, it is naturally lowered to room temperature. Part of the xylene is removed by rotary evaporation to obtain a concentrated solution of polymer A1. Multiple precipitation methods are used to remove unreacted monomers and small molecular weight polymers. After vacuum drying Polymer A1 was obtained. The chemical structure of the polymer adopts 1 The structure was confirmed by HNMR and FTIR, and the molecular weight and molecular weight distribution of the polymer were determined by gel chromatography (GP...

Embodiment 2-8

[0028] The synthesis of series maleic anhydride-dodecene random copolymer (polymer A2-polymer A8), its synthetic method is identical with embodiment 1, and the raw material ratio of maleic anhydride and dodecene in each polymkeric substance is listed in in FIG. 1. The results of polymer molecular weight and molecular weight distribution of polymers A1-A8 are listed in Table 1.

[0029] Table 1 Raw material ratio, polymer molecular weight and molecular weight distribution of a series of maleic anhydride-dodecene random copolymers

[0030]

Embodiment 9

[0032] Synthesis of maleic anhydride-dodecene block copolymer (polymer A9): 0.2mol dodecene, 0.02mol maleic anhydride, 60mL xylene and appropriate amount of initiator azobisisobutyronitrile AIBN and RAFT reagent two Thiobenzoic acid (2-ethoxycarbonyl)-2-propyl ester (EPDB) is added in the reaction flask equipped with magnetic stirring, wherein the mol ratio of AIBN and EPDB is 1.0:3.0, nitrogen deoxygenation after 1 hour sealing, warm up to 80 o C carries out the polymerization reaction 8h, and after the reaction finishes, the polymerization solution is poured into precipitation in the cold sherwood oil, repeats the process of dissolving and settling for many times, obtains poly(maleic anhydride-alt-dodecene)-b-polydodecene after filtration block copolymers. Data molecular weight M of polymer A9n 7600g / mol, weight average molecular weight M w 9196g / mol, molecular weight dispersion M w / M n is 1.21.

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Abstract

The invention relates to a waterborne self-emulsifying carbon fiber sizing agent applicable to thermoplastic resin and a preparation method thereof and belongs to the technical field of production of carbon fibers. The waterborne self-emulsifying carbon fiber sizing agent is prepared from an amphiphilic polymer A and / or an amphiphilic polymer B and de-ionized water. The preparation method comprises the following steps: dissolving the amphiphilic polymer A and / or the amphiphilic polymer B into a small amount of a proper organic solvent at a room temperature or a heating condition, and stirring by using a high-speed shearing and dispersion emulsifying machine to stir, wherein the stirring speed is 1000-25000; adding the de-ionized water until phase transferring occurs, and further stirring for 0.5-2 hours; and then carrying out rotary evaporation on the solution to remove the organic solvent to obtain the waterborne self-emulsifying carbon fiber sizing agent. The sizing agent prepared by the invention is the waterborne self-emulsifying sizing agent, has low cost and stable performances, is convenient to use, does not pollute the environment and belongs to a green environment-friendly product.

Description

technical field [0001] The invention relates to a water-based self-emulsifying carbon fiber sizing agent suitable for thermoplastic resins and a preparation method thereof, in particular to a water-based sizing agent and a preparation method for enhancing the interface bonding strength of thermoplastic carbon fiber composite materials, and belongs to the technical field of carbon fiber production. Background technique [0002] Fiber-reinforced thermoplastic resin-based composites (FRTP), a composite material made of thermoplastic resin as a matrix and fiber as a reinforcement, is a type of fiber-reinforced composite material that has developed rapidly in recent years. Carbon fiber-reinforced thermoplastic resin-based composite materials have Low density, high strength, good toughness, repeated impact resistance, large damage tolerance, no storage time limit for prepregs, short molding cycle, secondary molding and recycling, easy to achieve continuous, automatic preparation an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/227D06M15/263C08F210/14C08F222/06D06M101/40
Inventor 张笑晴罗元聪雷彩红张丰徐睿杰
Owner GUANGDONG UNIV OF TECH
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