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Preparation method of large-tow PAN (Poly-acrylonitrile) carbon fiber precursor oiling agent

A carbon fiber and large tow technology is applied in the field of preparation of large tow PAN-based carbon fiber precursor oil, which can solve the problems of easy delamination, re-stabilization of oil emulsion, etc.

Active Publication Date: 2014-11-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the PAN-based carbon fiber raw silk oil emulsion in the prior art is easy to delaminate during storage and transportation, and the oil emulsion cannot be re-stabilized by means such as stirring and shearing. Preparation method of a new large tow PAN-based carbon fiber raw silk oil agent

Method used

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  • Preparation method of large-tow PAN (Poly-acrylonitrile) carbon fiber precursor oiling agent
  • Preparation method of large-tow PAN (Poly-acrylonitrile) carbon fiber precursor oiling agent
  • Preparation method of large-tow PAN (Poly-acrylonitrile) carbon fiber precursor oiling agent

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Embodiment 1～10

[0025] Mix the components amino-modified polydimethylsiloxane A, amino-modified polydimethylsiloxane B, polyether-modified polydimethylsiloxane and emulsifier in the oil agent according to the required ratio Stir and mix in a mixing tank for 30 minutes, weigh 1 g of the stirred and mixed oil, put it in an aluminum crucible, and treat it in an oven at 105°C for 5 hours to make it dry. Accurately weigh 15 mg-20 mg of the above dry oil agent, place it in an aluminum crucible for TGA (thermogravimetric analysis), and measure its heat-resistant residual mass fraction. Firstly, heated to 240°C in the state of flowing air, and kept for 60min, measured the heat-resistant residual mass fraction r1; then switched the atmosphere (from air to nitrogen), heated to 450°C in nitrogen atmosphere, and kept for 30s, measured Get the heat-resistant residual mass fraction r2. The total heat-resistant residual mass fraction r=r1×r2.

[0026] Mix the components amino-modified polydimethylsiloxane...

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Abstract

The invention relates to a preparation method of a large-tow PAN (Poly-acrylonitrile) carbon fiber precursor oiling agent, which mainly solves the problem that in the prior art, the PAN carbon fiber precursor oiling agent emulsion is easy to layer in a storage and transportation process, and cannot be re-stabilized through manners such as stirring and cutting. The invention adopts a technical scheme of the preparation method of the large-tow PAN carbon fiber precursor oiling agent, which comprises the following step of preparing the oiling agent into the oiling agent emulsion with weight concentration being 70-90wt percent with water, wherein the oiling agent comprises the following components in parts by weight: a) 5-20 parts of amino-group modified polydimethylsiloxane A; b) 40-60 parts of amino-group modified polydimethylsiloxane B; c) 10-30 parts of polyether modified polydimethylsiloxane; and d) 5-20 parts of emulsifying agent, so that the problem is well solved, and the preparation method can be applied in storage and transportation of the large-tow PAN carbon fiber precursor oiling agent.

Description

technical field [0001] The invention relates to a preparation method of a large tow PAN-based carbon fiber raw silk oil agent. Background technique [0002] As the reinforcing fiber of a new generation of composite materials, carbon fiber is widely used in aerospace, aviation, automobile, construction, and light industry due to its excellent performance. Small-tow polyacrylonitrile-based carbon fiber (hereinafter referred to as small-tow PAN-based carbon fiber) is one of many carbon fibers with excellent performance, and is a key material required for strategic missiles, satellites, aerospace vehicles, and large aircraft. With the rapid development of elevated highways, the demand for large tow (greater than 24K) PAN-based carbon fibers has been rapidly increased. [0003] Industrially, PAN-based carbon fibers are prepared by the following procedures: one-step or two-step spinning of PAN polymers to obtain carbon fiber precursors; pre-oxidation of precursors in an oxidative...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F11/06D01F6/18D01F9/22
Inventor 唐泓畅延青施冲
Owner CHINA PETROLEUM & CHEM CORP