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- 2009
改性二氧化硅/NR纳米复合材料结构与性能研究Keywords: [改性二氧化硅,天然胶乳,纳米复合材料,微观结构,物理性能, 改性二氧化硅,天然胶乳,纳米复合材料,微观结构,物理性能,modified silica,natural rubber latex,nanocomposite,microstructure,physical properties] Abstract: 采用聚二甲基二烯丙基氯化铵(PDDA)对二氧化硅进行表面改性,制备改性二氧化硅/NR纳米复合材料,并对其微观结构和物理性能进行研究。结果表明,改性二氧化硅均匀分散在天然胶乳基体中;扫描电子显微镜分析显示复合材料呈界面模糊的海岛结构;改性二氧化硅/NR纳米复合材料的物理性能较NR胶料大幅提高;随着改性二氧化硅用量的增大,改性二氧化硅/NR纳米复合材料的物理性能先提高后降低;当改性二氧化硅的用量为5.3份时,纳米复合材料的综合物理性能较好。;The surface of silica was modified by polydimethyl diallylammonium chloride,and the modified silica/NR nanocomposite was prepared,and its microstructure and physical properties were investigated.The results showed that modified silica was uniformly dispersed in nature rubber latex;it was found by SEM that there was sea-island structure without clear phase boundary in silica/NR nanocomposite;compared with NR compound,the physical properties of modified silica/NR nanocomposite increased significantly;as the addition level of modified silica increased,the physical properties of modified silica/NR nanocomposite increased first and then decreased;when the addition level of modified silica was 5.3 phr,the composite possessed better comprehensive physical properties
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