利用喷雾干燥法制备了硅烷偶联剂KH550改性的累托石粉体,考察了喷嘴进口温度对制备的累托石粉体表面性质、结构及形貌的影响.将累托石粉体分别加入到丁苯橡胶(SBR)、天然橡胶(NR)和丁腈橡胶(NBR)中,通过熔融共混法制备了改性累托石/橡胶复合材料,研究了累托石在橡胶基体中的分散状态及其对基体的增强效果.结果表明:随着进气温度的提高,与累托石复合的KH550的量也随之增加；KH550分子插层进入累托石层间,阻碍了片层的再聚集,片层堆砌更加无序蓬松；改性累托石在SBR中出现了局部团聚现象,在NBR中分散较均匀,而在NR中分散状态最好；与相应的纯橡胶相比,改性累托石填充的SBR和NBR基复合材料的各项力学性能均有所提高,而其填充的NR基复合材料的定伸应力提高,拉伸强度和撕裂强度基本不变,断裂伸长率有所下降.
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