【摘要】 以丁苯橡胶为基质,微米氧化铝与纳米氧化铝为导热填料,制备了填充型导热橡胶,研究了微米氧化铝填充量、偶联剂表面处理对导热橡胶导热性能的影响,比较了纳米氧化铝和微米氧化铝填充的导热橡胶的导热性能及物理机械性能,并将2种粒子以不同配比加入丁苯橡胶基质中,对其影响进行了探讨。结果表明,随着微米氧化铝填充份数的增加,丁苯橡胶的导热系数增大,但其加工性能和物理机械性能下降;用硅烷偶联剂KH-570,KH-550,A-151和钛酸酯偶联剂TM-S105表面处理后的微米氧化铝对导热橡胶的导热性能有一定影响,但并不显著;在相同填充量下,纳米氧化铝填充的导热橡胶比微米氧化铝填充的导热橡胶具有更好的导热性能及物理机械性能;在合适的比例下,纳米氧化铝与微米氧化铝混合填充的导热橡胶其导热效果优于单纯使用微米粒子填充的橡胶。更多还原

【Abstract】 Micro-and nano-alumina particles were used as heat conductive fil le rs of SBR.For micro-alumina,the influence of filler amount and the surface trea tment of filler on the thermal conductivity of SBR were studied.The thermal cond uctivity and mechanical properties of SBR filled with micro-alumina were compar ed with that of SBR filled with nano-alumina.In addition,a mixture of micro-al umina and nano-alumina was also used as filler to further improve the thermal c onductivity of SBR.The results showed that the static thermal conductivity incre ased with increasing micro-alumina amount.Treatment of micro-alumina particles with coupling agents(KH-570,KH-550,A-151,TM-S 105) had a little effect on t he thermal conductivity of the filled SBR.When nano-alumina particles were empl oyed,thermal conductivity,mechanical properties and processability of the rubber became better than those of the rubber filled with micro-alumina at the same f iller loading. Besides,the composite rubber incorporated with hybrid micro-alum ina and nano-alumina particles at certain ratio exhibited higher thermal conduc tivity as compared with the case where only micro-alumina particles were used.更多还原