摘要：采用球磨溶液改性的方法制备改性凹凸棒土,利用机械共混法制备凹凸棒土-炭黑-天然橡胶复合材料,研究凹凸棒土与炭黑相互作用对天然橡胶性能的影响。结果表明:Si11-110型硅烷偶联剂对凹凸棒土有良好的改性作用,凹凸棒土与炭黑之间具有明显的协同补强效果,改性的凹凸棒土-炭黑-天然橡胶复合材料可以显著提高100%和300%的定伸强度、拉伸强度、断裂伸长率和耐切割性能;硅烷改性的凹凸棒土与炭黑协同补强能明显改善复合材料的网络结构,使得橡胶复合材料有更大的储能模量;通过增加结合胶的厚度,橡胶分子链在结合胶表面,更容易滑移和解缠,有效增大了拉伸强度和断裂伸长率。

关键词：凹凸棒土；天然橡胶；表面改性；结合胶；网络结构

Abstract： The modified attapulgite clay was prepared by the method of ball milling modification in solution. Attapulgite clay-carbon black-natural rubber composites were prepared by the method of mechanically compounding. Effect of interaction between attapulgite clay and carbon black on natural rubber was researched. The results show that the modification effect of Si11-110 type silane coupling agent on attapulgite clay is good. Obvious synergistic effect exists between the attapulgite clay and carbon black. The modified attapulgite clay -carbon black -natural rubber composites can significantly increase the stretching strength of 100% and 300% ， tensile strength， elongation at break and cut resistant property of composites. The rubber composites synergistically reinforced by silicone modified attapulgite clay and carbon black can obviously improve the network structure of the composites, which can make them have greater storage modulus. Rubber molecular chains are more likely to slip and unwrap in combination with the rubber surface by increase the thickness of bound rubber， which effectively increases the tensile strength and elongation at break. 

Keywords: attapulgite clay； natural rubber； surface modification； bound rubber； network structure