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Carbon fiber for polyetherimide resin-based composite material and preparation method thereof

A polyetherimide resin and polyetherimide-based technology, which is applied in the field of carbon fiber for polyetherimide resin-based composite materials and its preparation, can solve problems such as poor impregnation, aging and hardening of fibers, and achieve preparation Simple equipment and process, excellent temperature resistance and interface bonding ability, and good processing performance

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the sizing process, the present invention introduces a new type of suspending agent prepared by physical stirring and mixing method, which uses polyetherimide resin powder as the main body, sodium polyacrylate as the main dispersant, and alkylphenol polyoxyethylene ether as the stabilizing aid. Liquid carbon fiber sizing agent, which solves the problems of poor impregnation of polyetherimide matrix resin and aging and hardening of fibers
In the sizing process, the infrared radiation heating process before sizing is introduced, and the horizontal hot air drying oven drying process is introduced in the drying process after sizing, which solves the problem of the uniformity of the polyetherimide resin suspension sizing agent spreading on the carbon fiber surface and the fiber Drying and other issues

Method used

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  • Carbon fiber for polyetherimide resin-based composite material and preparation method thereof
  • Carbon fiber for polyetherimide resin-based composite material and preparation method thereof
  • Carbon fiber for polyetherimide resin-based composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1～4

[0050] Examples 1 to 4 are a manufacturing method of 50K carbon fibers suitable for polyetherimide resin-based composite materials, including polymerization, spinning, pre-oxidation, low-temperature carbonization, high-temperature carbonization, surface treatment, water washing, and drying before sizing , sizing, drying after sizing, winding and winding production process. The specific process is as follows:

[0051] Step 1: Aggregation.

[0052] Adopt sodium thiocyanate aqueous solution as solvent to carry out solution polymerization, take acrylonitrile, methyl methacrylate, sodium itaconate as polymerization monomer, the weight ratio of acrylonitrile, methyl methacrylate, sodium itaconate is 91.5: 5.2:3.3, the feed concentration of total polymerized monomer is 23.5wt%, add initiator azobisisobutyronitrile simultaneously, initiator consumption is 0.52wt% with all polymerized monomer total amount, 81 ℃ of polymerization temperature, The reaction time was 92 minutes.

[0053...

Embodiment 5～8

[0070] Examples 5 to 8 are a method for manufacturing 60K carbon fibers suitable for polyetherimide resin-based composite materials. The specific process includes polymerization, spinning, pre-oxidation, low-temperature carbonization, high-temperature carbonization, surface treatment, water washing, and sizing Pre-drying, sizing, drying after sizing, winding and winding production processes. The specific process of this embodiment is the same as that of Examples 1-4, wherein the parameters of spinning, pre-oxidation, low-temperature carbonization, high-temperature carbonization, and sizing are different.

[0071] Step 1: Aggregation. Described polymerization production procedure is identical with the method described in embodiment 1~4 step 1, adopts sodium thiocyanate aqueous solution to carry out solution polymerization as solvent, wherein the parameter that polymerization production procedure changes is that the comonomer proportioning of solution polymerization reaction is ...

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Abstract

The invention discloses a carbon fiber for polyetherimide resin-based composite materials and a preparation method thereof. The preparation process of the invention includes successive polymerization, spinning, pre-oxidation, low-temperature carbonization, high-temperature carbonization, surface treatment, water washing, and pre-sizing The production process of drying, sizing, drying after sizing and winding and winding; wherein: polyetherimide-based suspension sizing agent is used for sizing; the polyetherimide-based suspension sizing agent is made of polyetherimide Composed of resin powder, sodium polyacrylate, alkylphenol polyoxyethylene ether and deionized water; according to the total mass of solid components as 100%, polyetherimide powder accounts for 65-75wt%, sodium polyacrylate accounts for 12-17wt% %, alkylphenol polyoxyethylene ether accounts for 13-18wt%. The carbon fiber prepared by the invention is suitable for preparing polyetherimide resin-based composite materials, and the prepared composite materials have excellent temperature resistance and interface bonding ability, and good processing performance.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber preparation, in particular to a carbon fiber for polyetherimide resin-based composite materials and a preparation method thereof. Background technique [0002] Carbon fiber is a kind of inorganic fiber with high strength and high modulus. It is usually used as a reinforcement phase of composite materials, and it is combined with matrix resin to form a new material with comprehensive properties. Polyetherimide is a high-performance special engineering resin composed of regularly repeated ether and imide rings. Its products have excellent mechanical properties, high temperature resistance and dimensional stability, and can be used in most types of standard injection molding and Extrusion equipment processing can be widely used in high-end manufacturing fields such as high-temperature resistant electronic appliances and industrial equipment. [0003] The performance of the two-phase interface i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F11/14D01F11/16D01F9/22
Inventor 季春晓黄翔宇曹阿民刘瑞超袁玉红翁丽萍许璐璐马艳丽
Owner CHINA PETROLEUM & CHEM CORP
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