Polymer based self lubricated composite material, and preparation method

A composite material and polymer technology, which is applied in the field of polymer-based self-lubricating composite materials and their preparation, can solve the problems of high material cost, single molding method, and high price, and achieve excellent friction performance, expand the selection range, and reduce production costs. low effect

Inactive Publication Date: 2007-05-09
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patents CN1597771A, CN1183435A, CN1590455A, CN1425715A, CN1526756A, and CN1417255A respectively describe the preparation of polyoxymethylene, nylon, polyolefin, and polybutylene terephthalate with relatively high-priced lubricating modifiers such as polytetrafluoroethylene and molybdenum disulfide Thermoplastic resin-based self-lubricating materials such as glycol esters, the friction coefficient of the obtained material is still above 0.15, the wear is large, the service life is short, and the friction temperature rise during use puts forward higher requirements for the temperature resistance of the material matrix.
Chinese patents CN1186827A, CN1414037A, CN1847310A, and CN1243136A respectively select polyimide, polyether ether ketone, polyarylether ketone and other high-temperature resistant resins as substrat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Adopt the method of extrusion blending, polyamide (PA66) 1300g, talcum powder 300g, graphite 100g, add twin-screw extruder, add glass fiber 300g from twin-screw fiber feeding hole at the same time, extrude and blend and make composite material particle. According to GB 3960-83, the friction and wear properties of composite materials are tested, and the temperature change of the surface of the sample is detected by a temperature tester. The screw temperature is 240~265℃, the host speed is 10~35HZ, and the feeding frequency is 10~25HZ.

Embodiment 2

[0025] According to the method of Example 1, 1400 g of polyphenylene sulfide, 300 g of calcined kaolin, 60 g of graphite, and 240 g of carbon fiber were used to prepare composite material particles, and the performance of the composite material was tested according to the method of Example 1. The screw temperature is 270~310, the speed is 20~40HZ, and the feeding frequency is 10~30HZ.

Embodiment 3

[0027] According to the method of Example 1, 1400 g of polycarbonate, 300 g of kaolin, 100 g of graphite, and 200 g of carbon fiber were used to prepare composite material particles, and the performance of the composite material was tested according to the method of Example 1. The screw temperature is 260~300, the speed is 10~40HZ, and the feeding frequency is 10~30HZ.

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PUM

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Abstract

This invention relates to a method for preparing self-lubricating composite, especially self-lubricating polymer-based composite. The method comprises: drying polymer matrix, solid lubricant, reinforcing fibers and fillers, mixing the above raw materials except fibers, mixing uniformly by a high-speed mixer, adding into an extruder, granulating, adding fiber filaments from the feed hole of the extruder, and controlling the fiber content by adjusting the rotation speed and feeding frequency to obtain self-lubricating composite granules.

Description

technical field [0001] The invention relates to a self-lubricating composite material and a preparation method thereof, in particular to a polymer-based self-lubricating composite material and a preparation method thereof. Background technique [0002] Traditional wear-resistant materials use metal as the base material, and the produced parts generate high noise and high energy consumption under high-speed operation, and lubricants need to be added, which easily pollutes the environment and products. Therefore, in recent years, polymer-based self-lubricating composite materials have received widespread attention at home and abroad, and papers and patents have emerged in an endless stream. Chinese patents CN1597771A, CN1183435A, CN1590455A, CN1425715A, CN1526756A, and CN1417255A respectively describe the preparation of polyoxymethylene, nylon, polyolefin, and polybutylene terephthalate with relatively high-priced lubricating modifiers such as polytetrafluoroethylene and molyb...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L81/02C08L69/00C08L59/02C08K7/14C08J3/12C08K3/00
Inventor 黄培王晓东宋艳江
Owner NANJING UNIV OF TECH
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