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Titanium base whisker reinforced polyether ether ketone wearable composite material and its preparation method

A technology of polyether ether ketone and composite materials, which is applied in the field of high-performance polymer composite materials and its preparation, can solve the problems of hard particles, easy-to-damage dual materials, and coarse fiber size, etc., and achieve low and outstanding friction coefficient and wear rate The effect of abrasion resistance and good alkali resistance

Active Publication Date: 2007-05-23
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still difficult to meet the requirements of high precision, high load, heat resistance, corrosion resistance and wear resistance
For example, carbon fiber and glass fiber filled PEEK, due to the large size of the fiber, the broken particle is hard, it is easy to damage the dual material during the friction process, and its wear resistance as an anti-friction and wear-resistant material is not ideal.
At present, due to the lack of breakthroughs in process methods, it is still difficult to solve the problem of high-dispersion and high-performance composites of nano-powders, which restricts the performance of PEEK / nanocomposites.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Treatment of LiFeTiO with 1.2% alumina sol by mass of whiskers 4 Whiskers, the whisker diameter is 1-3μm, aspect ratio 10-50, mechanically mix 10wt% polytetrafluoroethylene and 60wt% polyetheretherketone for 5min, then add 30wt% LiFeTiO 4 Whiskers were mixed for 3 minutes to obtain a mixture, which was then extruded at a temperature of 350° C. for 4 minutes and a head pressure of 0.8 MPa. The friction and wear performance of the material was tested on the MPX-2000 friction and wear testing machine, 200N, 1.4m / s, and the test time was 2h.

Embodiment 2

[0029] Select 2.5% of the whisker quality fluorosurfactant FSO modified titanium dioxide whisker, whisker diameter is 0.5-2.5μm, length-to-diameter ratio 10-30, 25wt% modified titanium dioxide whisker is filled with 75wt% polyetheretherketone , 350 ℃ 12MPa heat preservation 60min hot-molded samples, 300N, 1.4m / s, 2hr test friction and wear properties.

Embodiment 3

[0035] γ-Propyltrimethoxysilane modified KFeTiO with 1.5% whisker quality 5 Whiskers, the diameter of the whiskers is 0.8-2 μm, the aspect ratio is 10-20, and 10 wt% of modified KFeTiO 5 Whiskers filled with 90%wt polyetheretherketone, hot molded samples at 370°C at 8MPa for 60min, tested the friction and wear properties of the composite in 10wt% NaOH strong alkali solution (200N, 1.4m / s, 2hr). The composite material also has good friction and wear properties in strong alkali solution.

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Abstract

The invention relates to polyether ether-ketone wear-resisting compound material which is strengthened by titanium base crystal as well as preparative method. The mentioned titanium base crystal has a diameter of 0.5-3.0 mum, length-diameter ratio of 5-50 and its surface reshaped. The ingredient of the compound material includes titanium base crystal, polytef and PEEK, it's shaped by hot mould pressing or pouring so it has very good strength, and abradability. Compared to the carbon fiber strengthened polyether ether-ketone of the same content, the abradability of the invention has been increased by 10 times, the frictional coefficient has been decreased by 30% and the temperature of the friction surface has been lowered by half. The invention has very good alkali resistance, so it is adaptable to be the ware and wear-resisting material in lye; it's also applicable to special conditions such as high temperature, vacuum, radiation and causticity; it can be widely used as piston link, filling, sliding piece and valve piece, the service life of the material in the invention has been greatly prolonged.

Description

technical field [0001] The invention relates to a high-performance polymer composite material and a preparation method thereof, in particular to a polyether ether ketone wear-resistant composite material reinforced by titanium-based whiskers and a preparation method thereof. Background technique [0002] Polyether ether ketone (PEEK) is a new type of semi-crystalline aromatic plastic engineering plastics with excellent properties such as high temperature resistance, self-lubrication, and high mechanical strength. However, pure PEEK has a low heat distortion temperature (152°C). As a good anti-friction and wear-resistant material, the friction coefficient and wear rate are relatively high. Therefore, researchers at home and abroad use polytetrafluoroethylene, polyphenylene sulfide, carbon fiber, glass fiber, other micro-particles, nano-powder, etc. to enhance and modify it by blending and filling to obtain PEEK with better performance. alloy or PEEK composite [1-4]. However...

Claims

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Application Information

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IPC IPC(8): C08L71/00C08L61/02C08K7/02B29C43/58B29C47/92B29B7/00B29B9/12C08L27/18B29C48/92
CPCB29C47/92
Inventor 冯新汪怀远陆小华何鹏王昌松史以俊
Owner NANJING UNIV OF TECH
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