Preparation method of polyether-ether-ketone/graphene oxide nano-composite film

A technology of polyether ether ketone and nanocomposite, which is applied in the field of preparation of functional polymer materials, can solve the problems of unsatisfactory wear resistance, easily damaged dual materials, and large size, so as to improve mechanical and thermal stability and improve friction The effect of chemical performance and easy industrialization

Inactive Publication Date: 2012-12-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Polyether ether ketone (PEEK) is a kind of fully aromatic semi-crystalline thermoplastic polymer. As a matrix of high-performance composite materials, it has excellent mechanical properties and heat resistance And chemical resistance, widely used in engineering, so it has become another popular wear-resistant and anti-friction material after polytetrafluoroethylene (PTFE); the repeating unit of PEEK molecule has 19 carbon atoms, 12 Hydrogen atoms and 3 oxygen atoms are composed of benzene rings, ether bonds, and carbonyl groups with a quantitative ratio of 3:2:1. The existence of ether bonds increases the flexibility of molecular chain segments, which is conducive to the regular stacking of chain segments to form a crystal structure; However, due to its complex synthesis process, high cost, and high friction coefficient, its application is limited; therefore, researchers at home and abroad use polytetrafluoroethylene, polyphenylene sulfide, carbon fiber, glass fiber, and other micron However, it is still difficult to meet the requirements of high precision, high load, heat resistance, corrosion resistance and wear resistance; for example, glass fiber, carbon fiber and micron particle reinforcement The polyetheretherketone, due to the large size of particles and fibers, is hard after being broken, it is easy to damage the dual material during the friction process, and its wear resistance is not ideal as a friction-reducing and wear-resistant material; patent 200610097372.6 uses titanium-based crystal Whiskers are used to improve t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] a. Preparation of modified graphene oxide: 5 g of natural graphite and 5 g of sodium nitrate were added to 200 ml of concentrated sulfuric acid, placed in an ice bath and stirred for 30 min, then slowly added 10 g of potassium permanganate, and the permanganese After the potassium chloride is completely dissolved, transfer the reaction system to a 35°C water bath and stir for half an hour, slowly add 200 ml of deionized water to the reaction system, continue stirring, and then add 50 ml of 30% hydrogen peroxide solution, Finally, the above solution is centrifugally filtered, washed with water several times until neutral, and dried to obtain graphene oxide.

[0016] b. Preparation of sulfonated polyether ether ketone: Dissolve 1g of polyetheretherketone powder in 50ml of concentrated sulfuric acid, stir and react at room temperature for 3-5 hours, pour the solution into ice-water mixture, stir for 1 hour, and let stand overnight , and then washed with deionized water sev...

Embodiment 2

[0022] a. The graphene oxide preparation process and steps in the present embodiment are the same as those in Example 1a.

[0023] b. The preparation process and steps of the sulfonated polyether ether ketone in this example are the same as those in Example 1b.

[0024] c. The preparation process and steps of the silane coupling agent-modified graphene oxide in this example are the same as those in Example 1b, except that 0.15 ml KH570 silane coupling agent is used.

[0025] d. Preparation of polyetheretherketone / graphene oxide nanocomposite film: disperse 0.005g of KH570-treated graphite oxide and 5g of sulfonated polyetheretherketone in 20 ml of N,N-dimethylformamide, ultrasonically disperse After 30 minutes, the mixed solution was vacuum degassed for 30 minutes, and finally the mixed solution was poured into a mold and dried at 40°C for 6 hours to prepare a polyether ether ketone / graphene oxide nanocomposite film. -2 The friction and wear performance was tested on a fricti...

Embodiment 3

[0029] a. The graphene oxide preparation process and steps in the present embodiment are the same as those in Example 1a.

[0030] b. The preparation process and steps of the sulfonated polyetheretherketone in this example are the same as those in Example 1b.

[0031] c. The preparation process and steps of the silane coupling agent-modified graphene oxide in this example are the same as those in Example 1b, except that 0.2 ml KH560 silane coupling agent is used.

[0032] d. Preparation of polyetheretherketone / graphene oxide nanocomposite film: Disperse 0.01g of KH560 modified graphene oxide and 5g of sulfonated polyether ether ketone in 10 ml of N,N-dimethylacetamide, and ultrasonically After dispersing for 45 minutes, the mixed solution was vacuum degassed for 30 minutes, and finally the mixed solution was poured into a mold and dried at 60°C for 8 hours to prepare a polyether ether ketone / graphene oxide nanocomposite film. The friction and wear properties were tested on th...

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Abstract

The invention belongs to a preparation method of a functional polymer and relates to a preparation method of a polyether-ether-ketone/graphene oxide nano-composite film. The polyether-ether-ketone/graphene oxide nano-composite film is prepared by blending graphene oxide treated by a silane coupling agent, and sulfonated polyether-ether-ketone by a tape casting method, and has high strength and good anti-wear and friction reduction effects. The polyether-ether-ketone/graphene oxide nano-composite film obtained by the preparation method solves the problem of organic and inorganic interface dispersion caused by other preparation methods, and realizes organic/inorganic nano-material compounding in a molecular level. The preparation method has simple processes, is convenient for operation, can be industrialized easily, and has potential application values in fields of structural materials, friction materials, heat-resistant materials and barrier materials.

Description

technical field [0001] The invention belongs to a method for preparing a functional polymer material, in particular to a method for preparing a polyether ether ketone / graphene oxide nanocomposite film. Background technique [0002] Polyetheretherketone (PEEK) is a fully aromatic semi-crystalline thermoplastic polymer. As a matrix of high-performance composite materials, it has excellent mechanical properties, heat resistance and chemical resistance. It is widely used in engineering and has become a successor Another popular wear-resistant and friction-reducing material after polytetrafluoroethylene (PTFE); the repeating unit of PEEK molecule has 19 carbon atoms, 12 hydrogen atoms and 3 oxygen atoms in a ratio of 3:2: 1, composed of benzene ring, ether bond, and carbonyl group. The existence of ether bond increases the flexibility of the molecular segment, which is conducive to the regular stacking of the segment to form a crystal structure; however, due to its complicated sy...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L71/08C08K9/06C08K3/04
Inventor 宋浩杰李娜赵学超李金波闵春英
Owner JIANGSU UNIV
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