采用正交试验设计法对硅橡胶的导热绝缘性能进行研究,通过改变氧化镁、氧化铝、钛酸钡及玻璃纤维粉的用量来筛选填料的最佳配方。结果表明:单一填料时,导热系数及介电常数随着填料用量的增加而增加,而拉伸强度则随之降低。最佳配方填充条件下制得的硅橡胶复合材料的导热系数、介电常数、拉伸强度分别为0.442W/(m·℃)、3.974、4.84MPa,相较于纯硅橡胶导热系数提升了68.7%、介电常数提升了28.5%,拉伸强度略有下降,热稳定性能提高。
The orthogonal experimental design method was used to study the thermal insulation properties of silicone rubber.The optimum formulation of the filler was screened by changing the amount of magnesium oxide,aluminum oxide,barium titanate and glass fiber powder.The thermal conductivity,dielectric constant and tensile strength of the composites prepared under the optimal formulation filling conditions were 0.442W/(m·℃),3.974 and 4.84MPa,respectively,which was improved compared with the thermal conductivity of pure silicone rubber,reached 68.7%,the dielectric constant increased by 28.5%,respectively.The tensile strength was slightly decreased,and the thermal stability of the material was improved.
[1] 赵陈超,章基凯.硅橡胶及其应用[M].北京:化学工业出版社,2015,8-30.
[2] 林晓丹,曾幸荣,陆湛泉,等.氧化镁填充导热硅橡胶的性能研究[J].橡胶工业,2008,55(5):291-294.
[3] 周文英,齐暑华,涂春潮,等.Al2O3对导热硅橡胶性能的影响[J].合成橡胶工业,2006,29(6):462-465.
[4] 刘维,王珊,熊传溪.钛酸钡/氮化硼/聚酰亚胺三元复合薄膜的制备及其性能研究[J].塑料工业,2017,45(5):128-132.
[5] 李丰恺,邓安仲,戎翔,等.磨碎玻璃纤维增强环氧树脂复合材料的制备及力学性能研究[J].材料开发与应用,2017,32(6):101-109.
[6] 杨坤民,陈福林,岑兰,等.导热橡胶的研究进展[J].橡胶工业,2005,52(2):118-123.
[7] 睢雪珍,周文英,蔡会武,等.铝粒子/硅橡胶复合材料的介电及导热性能[J].合成橡胶工业,2017,40(1):54-58.
[8] Nalwa H S,Dalton L R,Vasudevan P.Dielectric properties of copper-phthalocyanine polymer[J].European Polymer Journal,1985,21(11):943-947.
[9] 魏效玲,薛冰军,赵强.基于正交试验设计的多指标优化方法研究[J].河北工程大学学报(自然科学版),2010,27(3):95-99.
[10] 王韵然,罗廷纲,夏志伟,等.硅橡胶老化性能的研究进展[J].有机硅材料,2011,25(1):58-61.
[11] Wang S,Long C,Wang X,et al.Synthesis and properties of silicone rubber/organomontmorillonite hybrid nanocomposites[J].Journal of Applied Polymer Science,2015,69(8):1557-1561.
[12] Grassie N,Macfarlane I G,Francey K F.The thermal degradation of polysiloxanes—Ⅱ.Poly(methylphenylsiloxane)[J].European Polymer Journal,1979,15(5):415-422.
基金资助
京津冀科技成果转化项目(S17CZ1129)
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