无机填料对汽车油封材料导热性能和力学性能的影响  

Effects of Inorganic Fillers on Thermal Conductivity and Mechanical Properties of Automotive Oil Seal Materials

作　　者：邓昌友 DENG Changyou(Zhejiang Yipao Health Technology Co.,Ltd.,Jinhua,Zhejiang 321000,China)

机构地区：[1]浙江易跑健康科技有限公司,浙江金华321000

出　　处：《塑料》2024年第6期62-66,共5页Plastics

摘　　要：转向器、齿轮、轴承等关键部件的油封是影响汽车安全行驶的主要因素,以聚四氟乙烯为基体的油封材料兼具较好的性能及较长的使用寿命。为了研究油封材料摩擦性能、导热性能及力学性能的影响,采用共混、冷压及烧结工艺制备不同粒径、不同含量的样品。研究结果表明,当填料粒径为纳米量级时,烧制后的复合材料密度均值可达到2.11g/cm^(3),摩擦因数均值低于0.175;填料的含量越高,热导率越大,当填料的含量达到10%时,复合材料的热导率均值大于0.50。随着无机填料含量的增加,复合材料的拉伸强度逐渐降低,但是,拉伸模量呈上升的趋势;当填料的含量为10%时,复合材料的内部发生团聚,产生了微小缺陷,拉伸强度有小幅降低,但仍大于18.5MPa,拉伸模量高达1.3GPa,材料的蠕变减小,综合性能满足油封的使用要求。The oil seal of steering gear,gear,bearing and other key components was an important factor affecting the safe driving of automobiles.The oil seal material based on polytetrafluoroethylene had good performance and long service life.In order to research the influence of friction,thermal conductivity and mechanical properties of oil seal materials,the samples with different particle size and content were prepared by blending,cold pressing and sintering.The results showed that the average density of the fired composite could reach 2.11 g/cm~3 and the average friction coefficient could be lower than 0.175 when the particle size of the filler was in the order of nanometer.The higher the filler content,the greater the thermal conductivity,when the content reached 10%,the average thermal conductivity exceeds 0.50.With the increase of the content,the tensile strength of the composite decreases gradually,but the tensile modulus increases.When the content was 10%,although the tensile strength was reduced due to internal agglomeration resulting in small defects and other factors,it was still higher than 18.5 MPa,but the tensile modulus of the composite was as high as 1.3 GPa.The creep of the material decreases,and the comprehensive properties met the needs of oil seal applications.

关 键 词：无机填料 复合材料 摩擦性能 导热性能 力学性能 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]