Carbon fiber modified with crystalized crosslinkable polyaryletherketone sizing agent and preparation method of carbon fiber

A polyaryletherketone, carbon fiber technology, applied in the direction of carbon fiber, fiber treatment, fiber type, etc., can solve the problems of easy oxidation of hydroquinone, affecting mechanical properties, affecting interface properties, etc., to improve the interface bonding strength, interface Improved shear performance and enhanced interfacial bonding

Active Publication Date: 2020-02-21
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no epoxy resin curing agent in its formula, resulting in residual epoxy groups, and the thermal decomposition temperature of epoxy groups is lower than the processing temperature (400°C) of polyether ether ketone materials, and the by-products generated by thermal decomposition will cause interface defects. Affect the interface performance; at the same time, the uncured epoxy resin dissolves in the organic solvent, resulting in interface failure; the hydroquinone used in this patent is easy to oxidize in the air, which is lower than the processing temperature of the polyetheretherketone composite material, which also affects the polyether Mechanical Properties of Etherketone Composite Products
In addition, this method also does not form an effective chemical bond between the sizing agent and the carbon fiber

Method used

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  • Carbon fiber modified with crystalized crosslinkable polyaryletherketone sizing agent and preparation method of carbon fiber
  • Carbon fiber modified with crystalized crosslinkable polyaryletherketone sizing agent and preparation method of carbon fiber
  • Carbon fiber modified with crystalized crosslinkable polyaryletherketone sizing agent and preparation method of carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Put 20mmol of ketimine fluoroketone and 20mmol of hydroquinone into sulfolane, polymerize at reflux temperature for 10h, reduce the temperature of the polymer solution to 120°C after the polymerization is completed, and directly add 1mmol of phenylethynyl fluoroketone for capping. After the reaction is completed, the material is discharged in methanol and washed three times to obtain phenylacetylene-capped soluble crosslinkable ketimine polyetheretherketone (the number average molecular weight is 20000g / mol);

[0048] Add 10 g of p-anilinophenylacetylene to 100 mL of an aqueous solution containing 15 g of sodium nitrite and 0.1 mol of hydrochloric acid at zero temperature, and then undergo recrystallization to obtain phenylacetylene diazonium salt. Pull the carbon fiber into the acetonitrile solution with a concentration of 1mmol / L phenylacetylene diazonium salt, and use a brush to feed a current of 0.5A to carry out the grafting reaction, so that the crosslinking group ...

Embodiment 2

[0057] Put 20mmol of ketimine fluoroketone and 20mmol of hydroquinone into sulfolane, carry out polymerization at reflux temperature for 5h, reduce the temperature of the polymer solution to 120°C after polymerization, and directly add 1mmol of distyryl fluoroketone for capping. After the reaction is completed, the material is discharged in methanol and washed three times to obtain a soluble crosslinkable ketimine polyether ether ketone (number average molecular weight: 4000 g / mol) terminated by phenylmaleimide;

[0058] Add 10 g of phenylmaleamide aniline to 100 mL of an aqueous solution containing 15 g of sodium nitrite and 0.1 mol of hydrochloric acid at zero temperature, and then undergo recrystallization to obtain phenylmaleamide diazonium salt. Pull the carbon fiber into the acetonitrile solution with a concentration of 1mmol / L phenylmaleamide diazonium salt, and use a brush to feed a 0.5A current to carry out the grafting reaction, so that the crosslinking group is graft...

Embodiment 3

[0066] Put 20mmol of ketimine fluoroketone and 20mmol of biphenyldiphenol into sulfolane, carry out polymerization at reflux temperature for 24h, after the polymerization is completed, lower the temperature of the polymer solution to 120°C, and directly put in 1mmol of phenylethynyl fluoroketone for capping. After the reaction is completed, the material is discharged in methanol and washed three times to obtain phenylacetylene-capped soluble crosslinkable ketimine polyetheretherketone (number average molecular weight 20000g / mol);

[0067] Add 10 g of phenylethynyl aniline to 100 mL of an aqueous solution containing 15 g of sodium nitrite and 1 mol of hydrochloric acid at zero temperature, and then undergo recrystallization to obtain phenylethynyl diazonium salt. Pull the carbon fiber into the acetonitrile solution with a concentration of 1mmol / L phenylethynyl diazonium salt, and use a brush to feed a 0.5A current to carry out the grafting reaction, so that the crosslinking grou...

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Abstract

The invention discloses a carbon fiber modified with a crystalized crosslinkable polyaryletherketone sizing agent and a preparation method of the carbon fiber and belongs to technical field of carbonfiber surface treatment. The preparation method includes subjecting double-fluorine monomer containing aniline side groups and bisphenol monomers to polymerization, or modifying crystalized polyaryletherketone, so as to obtain soluble amorphous polyaryletherketone polymer, and blocking thermotropic crosslinking groups to two terminals of the polymer; meanwhile, subjecting the carbon fiber to surface electrochemical reduction, and grafting the crosslinking groups which are the same as the mentioned to the surface of the carbon fiber; further, drafting the carbon fiber which is subjected to thesurface electrochemical reduction to pass through a sizing agent solution to size the carbon fiber, and performing acidification to recover the crystallinity of the polyaryletherketone sizing agent; finally, finishing the carbon fiber. The carbon fiber can be used for preparing a composite material, the composite material is subjected to high-heat treatment, so that the crosslinking reaction is initiated, the crystallinity of the polyaryletherketone polymer is improved, the sizing agent is allowed to have a crystalline texture and can form a chemical bonding with the surface of the carbon fiber, and further, the interference shear strength is improved, and the composite material has high temperature resistance and corrosion resistance performance.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber surface treatment, in particular to a carbon fiber modified with a crystalline crosslinkable polyaryletherketone sizing agent and a preparation method thereof. Background technique [0002] Composite materials are widely used in various fields due to their good mechanical properties and processing properties. Among various composite materials, special engineering plastic-based composite materials represented by polyaryletherketone / carbon fiber are more and more widely used, but due to the weak interface strength between the polyaryletherketone resin matrix and the carbon fiber surface, it affects the carbon fiber. Enhancing the performance of polyaryletherketone composites limits the wider application of polyaryletherketone / carbon fiber composites. [0003] As a common carbon fiber surface treatment method, sizing agent coating can form a uniform protective layer on the surface of carbon fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/08D06M15/53D06M101/40
CPCD06M10/08D06M15/53D06M2101/40D06M2200/40
Inventor 王贵宾王晟道杨砚超栾加双张淑玲张梅
Owner JILIN UNIV
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