PPS/BN composite material with high thermal conductivity and low friction coefficient and preparation method thereof

A technology of low friction coefficient and composite materials, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of uneven sample performance, insufficient wear resistance, agglomeration, etc., and achieve easy implementation, low cost, and simple equipment Effect

Active Publication Date: 2020-12-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the addition of more fillers in the composite material, the wear resistance is insufficient; at the same time, the high content of CNT is prone to agglomeration, which will lead to uneven performance of the sample

Method used

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  • PPS/BN composite material with high thermal conductivity and low friction coefficient and preparation method thereof
  • PPS/BN composite material with high thermal conductivity and low friction coefficient and preparation method thereof
  • PPS/BN composite material with high thermal conductivity and low friction coefficient and preparation method thereof

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Embodiment 1～12

[0027] (1) Mixing of PPS particles and BN: Add quantitative PPS particles with an average particle size of 1.39 mm (PPS-hb, Sichuan Deyang Special New Material Co., Ltd.) and 20 wt% absolute ethanol in the container at room temperature (AR, Guangdong Guanghua Technology Co., Ltd.), just wet the surface of PPS particles, according to the mass ratio of BN (BBN-30, Yaan Baitu High-tech Materials Co., Ltd. product) to PPS matrix: 15:85, 30: 70. PPS / BN composites with different ratios were obtained by adding BN microchips with an average size of 30 μm. In this process, the weighed BN needs to be added in batches, and each addition is fully stirred until the surface is evenly covered with a layer of BN, and there is no BN hanging on the inner wall of the container, and the mixture is mixed and used immediately.

[0028] (2) Preparation of PPS / BN composite material by hot pressing method: hot pressing the mixed particles in step (1), the hot pressing process conditions are: after hea...

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Abstract

The invention discloses a polyphenylene sulfide / boron nitride (PPS / BN) composite material with high thermal conductivity and low friction coefficient and a preparation method thereof. According to themethod, under the assistance of absolute ethyl alcohol, the surfaces of PPS particles are tightly and evenly coated with BN microchips within a short time, then hot press molding is conducted at thetemperature of 320-330 DEG C and the pressure of 200-1200 MPa, an isolation network structure with the BN microchips directionally distributed among the PPS particles is constructed in the material, and therefore the BN three-dimensional heat conduction network structure is constructed. In addition, based on the lubrication characteristics of the PPS and the BN and the good interface interaction of the PPS and the BN, the PPS / BN composite material finally shows excellent heat conduction and friction performance at the same time.

Description

technical field [0001] The invention relates to a polyphenylene sulfide composite material and a preparation method thereof, in particular to a polyphenylene sulfide / boron nitride composite material with high thermal conductivity and low friction coefficient and a preparation method thereof, belonging to the field of multifunctional composite material preparation . Background technique [0002] Polyphenylene sulfide (PPS) is a special engineering plastic with excellent comprehensive properties. It has good high temperature stability, self-lubrication, friction performance and corrosion resistance, so it is widely used in military industry, aerospace, automobile industry, electronic and electrical and many other fields. Its coefficient of friction is between 0.35 and 0.5, which is not enough to meet the application requirements under severe friction conditions. Therefore, in order to reduce the friction coefficient, most researchers add solid lubricating substances to the P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08K7/00C08K3/38C08J3/20C09K5/14
CPCC08K7/00C08K3/38C08J3/203C09K5/14C08K2003/385C08J2381/02C08L81/02
Inventor 陈妍慧钟克鹏梁昊昱童则鸣
Owner NORTHWESTERN POLYTECHNICAL UNIV
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