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Antiwear teflon composite material containing nano carbon tubes

A technology of polytetrafluoroethylene and carbon nanotubes, which is applied in the field of polymer composite materials to achieve good mechanical properties

Inactive Publication Date: 2004-11-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the literature and patents of using carbon nanotubes to prepare polytetrafluoroethylene composite materials with extremely high wear resistance have not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 80% of polytetrafluoroethylene and 20% of multi-walled carbon nanotubes are fully mixed according to the volume ratio, and hot-pressed and sintered to form. As a comparison, the same proportion of graphite-containing polytetrafluoroethylene composites were prepared by the same method. Compared with stainless steel, under the same friction test conditions, the wear amount of carbon nanotube reinforced PTFE composite material is 1 / 150 of pure PTFE material; while the wear of graphite modified PTFE composite material The amount is 1 / 40 of pure polytetrafluoroethylene.

Embodiment 2

[0013] 90% of polytetrafluoroethylene and 10% of single-walled carbon nanotubes are fully mixed according to the volume ratio, and hot-pressed and sintered to form. As a comparison, the same proportion of PTFE composites containing graphite fibers were prepared by the same method. Compared with stainless steel, under the same friction test conditions, the wear amount of carbon nanotube-reinforced PTFE composite material is 1 / 200 of that of pure PTFE material; while the wear of graphite fiber-reinforced PTFE composite material The amount is 1 / 60 of pure polytetrafluoroethylene.

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PUM

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Abstract

An antiwear PTFE composition is characterized by that it contains carbon nanotube (1-40 V%). Its advantages is very high antiwear performance increased by 150-200 times.

Description

technical field [0001] The invention relates to polymer composite materials, especially polytetrafluoroethylene composite materials containing carbon nanotubes with high wear resistance. Background technique [0002] PTFE has high chemical stability and corrosion resistance, and is widely used in machinery, chemical and other fields. However, pure PTFE materials have the disadvantages of low mechanical strength and elasticity, and a linear expansion coefficient that increases with temperature. Especially under load and high-speed operation conditions, its size is unstable and prone to permanent deformation. Although the PTFE material itself has certain self-lubricating properties, the wear resistance of pure PTFE materials is poor. These deficiencies limit the application of PTFE materials in some fields. [0003] In order to improve the wear resistance of PTFE materials, the previous technology mainly filled PTFE with other materials to prepare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/02C08L27/18
Inventor 陈卫祥
Owner ZHEJIANG UNIV