题目：Revisiting Silica Networks by Small-Angle Neutron Scattering and Synchrotron Radiation X-ray Imaging Techniques

作者：Xin-Wei Kang^a , Dong Liu^b, Ping Zhang^a , Ming Kang^a , Feng Chen^a , Qing-Xi Yuan^c, Xiu-Li Zhao^d,Ying-Ze Song^a*  and Li-Xian Song^a* 

单位：^a State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China

^b Key Laboratory of Neutron Physics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China

^c Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

^d Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China

摘要：The silicone rubber composites present remarkable mechanical properties due to the double network structure constructed with molecular network of matrix and filler structure of silica. Nevertheless, the filler network structure and corresponding reinforcement mechanism are still under debate and need to be further probed with the aid of applicative advanced analysis techniques. Herein, small-angle neutron scattering (SANS) and synchrotron radiation X-ray nano-computed tomography (Nano-CT) techniques are employed to explore the evolution of filler networks of fumed, precipitated and sol-gel silica, respectively. Our studying results reveal the formation of filler network constructed by the interconnecting of branched silica aggregates. And the silica with high structure, pertaining to amorphous morphology, small size and large surface area presents short distance and effective molecular chain bridge between aggregates, thus forming strong and steady filler networks. This work would provide deep-seated revisiting of filler networks and corresponding reinforcement mechanism and offer guidance for optimizing the mechanical properties of silicone rubber.

期刊及影响因子：Chinese J. Polym. Sci.；3.26（2020年2月)

DOI：10.1007/s10118-020-2402-1.

链接：http://www.cjps.org/article/doi/10.1007/s10118-020-2402-1?pageType=en.