摘要
加入纳米二氧化硅填料能显著改善硅橡胶的力学性能。利用小角中子散射(SANS)和同步辐射X射线三维纳米计算机断层扫描(Nano-CT)技术协同表征了SiO2/硅橡胶复合体系中填料的聚集形态、填料网络的形成及其结构随填料含量的变化关系。结果表明:随填料含量的增加,SiO2聚集体的平均粒径和距离均呈现出减小的趋势,填料网络密度和连通率逐渐增加;当填料含量≥40份/100份时,形成了相互连通的填料网络结构。填料网络的形成使硅橡胶复合材料力学性能得到显著提升。
Adding silica nanofiller to silicone rubber can significantly improve its mechanical properties.With the high resolution of small angle neutron scatting(SANS)and the large-field technique of synchrotron X-ray three-dimensional nano-computed tomography(Nano-CT),the aggregation morphology of fillers in SiO 2/silicone rubber composites system,the formation of filler network and the relationship between its structure and the filler content were synergistically characterized.The results show that the average particle size and distance of silica aggregates tend to decrease with the increase of the filler content,along with the gradual increase of the filler network density and connectivity.When the filler contentΦsi≥40 phr,the interconnected filler network structure is formed.The formation of the filler network is the main reason for the remarkable improvement in mechanical properties of silicone rubber composites.
作者
康新尉
陈乐
陈凤
宋丽贤
KANG Xinwei;CHEN Le;CHEN Feng;SONG Lixian(State Key Laboratory of Environmentally-friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)
出处
《西南科技大学学报》
CAS
2020年第2期55-62,共8页
Journal of Southwest University of Science and Technology
基金
四川省科技计划项目(2018GZ0155)。
