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Novel self-lubricating polymer composite material and its prepn process

A composite material and polymer technology, which is used in the field of calcium carbonate whiskers and polytetrafluoroethylene co-filled polymer self-lubricating composite materials and their preparation, can solve the problem that mechanical and thermal properties are difficult to optimize and match, hinder the application of self-lubricating composite materials, The improvement of wear resistance is not significant enough to achieve the effect of abundant raw materials, high cost performance and lower production costs

Inactive Publication Date: 2006-10-18
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although traditional modification methods such as fiber reinforcement and nanoparticle compounding can improve the tribological properties such as friction reduction and wear resistance of polyether ether ketone-based polymer composites, as well as certain aspects of mechanical and thermal properties to varying degrees. , but as tribological materials, these modification methods still have problems such as high friction coefficient, insufficient improvement of wear resistance, difficulty in optimizing matching of mechanical and thermal properties, complex and difficult to control process, and poor formability. The high price of the material itself increases the cost of the composite material, hindering its application as a self-lubricating composite material

Method used

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Effect test

preparation example Construction

[0019] The above-mentioned preparation method of novel polymer self-lubricating composite material is characterized in that it comprises the following preparation steps:

[0020] (a) drying calcium carbonate whiskers, polytetrafluoroethylene, and polyether ether ketone raw materials at a temperature of 130-150° C. for 3-5 hours;

[0021] (b) Mix the dried calcium carbonate whiskers, polytetrafluoroethylene and polyether ether ketone raw materials in step (a), put them into a mixer, and stir and mix at a high speed of not less than 1000 rpm for 8 to 10 minutes;

[0022] (c) Put the material stirred in step (b) into the mold cavity of a hot-pressing mold at 380-390°C and melt it, pressurize 20Mpa to shape the material, keep the pressure for 8-10 minutes, and when the temperature of the mold cools to 100°C, take off Mold cooled to room temperature;

[0023] (d) keeping the material after demoulding and cooling in step (c) at a temperature of 250° C. for 1 hour to obtain a produc...

Embodiment 1

[0025] Embodiment 1 (preferred embodiment)

[0026] Take 10 parts of calcium carbonate whiskers as raw materials, 10 parts of polytetrafluoroethylene, and 80 parts of polyether ether ketone, wherein the calcium carbonate whiskers have an aspect ratio of 30 and a density of 2.86g / cm 3 , PTFE particle size 10μm, density 2.18g / cm 3 , the density of polyether ether ketone is 1.32g / cm 3 , particle size 100 μm, prepared according to the following steps:

[0027] (a) Dry calcium carbonate whiskers, polytetrafluoroethylene, and polyether ether ketone raw materials at a temperature of 130° C. for 5 hours;

[0028] (b) Mix the calcium carbonate whiskers, polytetrafluoroethylene, and polyetheretherketone raw materials dried in step (a), put them into a blender, and stir and mix at a high speed of not less than 1000 rpm for 8 minutes;

[0029] (c) Put the material stirred in step (b) into the mold cavity of a 380°C hot-pressing mold to melt, pressurize at 20Mpa to shape the material, h...

Embodiment 2

[0031] Embodiment 2 (preferred embodiment)

[0032] Take 15 parts of calcium carbonate whiskers as raw materials, 10 parts of polytetrafluoroethylene, and 75 parts of polyether ether ketone, wherein the calcium carbonate whiskers have an aspect ratio of 25 and a density of 2.86g / cm 3 , PTFE particle size 10μm, density 2.18g / cm 3, the density of polyether ether ketone is 1.32g / cm 3 , particle size 100 μm, prepared according to the following steps:

[0033] (a) Dry calcium carbonate whiskers, polytetrafluoroethylene, and polyether ether ketone raw materials at a temperature of 140° C. for 4 hours;

[0034] (b) Mix the dried calcium carbonate whiskers, polytetrafluoroethylene, and polyether ether ketone raw materials in step (a), put them into a blender, and stir and mix at a high speed of not less than 1000 rpm for 9 minutes;

[0035] (c) Put the material stirred in step (b) into the cavity of a 385°C hot-pressing mold to melt, pressurize at 20Mpa to form the material, hold t...

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Abstract

The present invention relates to novel self-lubricating polymer composite material and its preparation process. The novel self-lubricating polymer composite material is prepared with calcium carbonate whisker in 10-25 weight portions, PTFE in 10 weight portions and polyether ether ketone in 65-80 weight portions; and the preparation process includes the following steps: drying the said materials at 130-150 deg.c and mixing through high speed stirring in a stirrer; melting the mixture in a hot pressing mold pressurizing at 20 MPa to form, maintaining for 8-10 min, cooling inside the die to 100 deg.c, demolding, cooling to room temperature, and maintaining at 250 deg.c of 1 hr. The present invention has calcium carbonate whisker to strengthen polyether ether ketone, PTFE as antifriction agent, and the cooperation of polyether ether ketone, PTFE and calcium carbonate whisker to result in self lubricating, reduced friction and raised wear resistance.

Description

technical field [0001] The invention relates to a polymer self-lubricating composite material filled with calcium carbonate whiskers and polytetrafluoroethylene and a preparation method thereof. Background technique [0002] Many frictional conditions in the military high-tech field represented by aerospace have exceeded the usual limit of use, so it is necessary to seek new high-strength anti-friction and wear-resistant self-lubricating materials to adapt to complex working environments, while the civil engineering field is based on service The needs of the environment, energy saving and environmental protection, and clean production also put forward higher requirements for high-performance oil-free lubricating friction materials. Polymer self-lubricating composite materials can adapt to conditions such as no lubrication, humidity, pollution, corrosion, radiation, etc., and their operating temperature and load-carrying capacity are also continuously improved. With their out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/00C08K3/26C08L27/18
Inventor 林有希高诚辉黄健萌林谢昭李志方
Owner FUZHOU UNIV
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