摘要
利用天然针状硅酸盐——凹凸棒石（AT）的结构特点，采用机械共混法并结合原位改性技术制备了一系列硅酸盐纳米纤维／橡胶复合材料，研究了复合材料的结构与性能，分析了针状硅酸盐良好增强效果的内在机制。借助硅烷偶联剂的原位改性和混合过程中的机械剪切力，AT微米聚集体被解离成长径比为10～30的纳米纤维分散在橡胶基体中，纳米复合材料表现出短纤维／橡胶复合材料（SFRC）的应力-应变特性和明显的力学性能各向异性。而且，AT／橡胶纳米复合材料具有优良的高温模量和加工性能。AT的优良的增强效果来源于AT的纳米分散和良好的纤维-橡胶界面结合。
Based on the special structural properties of natural fibril silicate attapulgite, silicate nano-fiber/rubber composites were successfully prepared by mechanically compounding, combined with the in-situ modification method. The structure and properties of the composites were studied, and the reinforcing mechanism of AT was discussed as well. Upon shear force during mixing as well as in-situ modification with silane coupling agent, attapulgite micron particles are separated into numerous nano-fibers with the length/diameter ratio of 10-30 into the rubber matrix. AT/rubber composites possess stress-strain behavior and distinct anisotropy similar to those for short fiber reinforced rubber composites （SFRC）, higher modulus at higher temperatures and good processing property, resulted from nano-dispersing of AT and good rubber-AT interracial bonding.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2007年第2期79-85,共7页
Acta Materiae Compositae Sinica
基金
国家"863"高技术研究计划项目(2002AA334050)
北京市新星计划项目(H020820620120)
