Revisiting Silica Networks by Small-angle Neutron Scattering and Synchrotron Radiation X-ray Imaging Techniques

Xin-Wei Kang; Dong Liu; Ping Zhang; Ming Kang; Feng Chen; Qing-Xi Yuan; Xiu-Li Zhao; Ying-Ze Song; Li-Xian Song

doi:10.1007/s10118-020-2402-1

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Revisiting Silica Networks by Small-angle Neutron Scattering and Synchrotron Radiation X-ray Imaging Techniques

ARTICLE | Updated：2020-04-21

- Revisiting Silica Networks by Small-angle Neutron Scattering and Synchrotron Radiation X-ray Imaging Techniques
- Chinese Journal of Polymer Science Vol. 38, Issue 9, Pages: 1006-1014(2020)
- Affiliations：
  
  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
- Author bio：
  
  yzsong@swust.edu.cn (Y.Z.S.)
  songlixian@swust.edu.cn (L.X.S.)
- Funds：
- DOI：10.1007/s10118-020-2402-1
  CLC：
- Received：10 January 2020，
  
  Revised：2020-1-28，
  
  Accepted：10 February 2020，
  
  Online First：21 April 2020，
  
  Published：2020-09
- Accepted：
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Kang, X. W.; Liu, D.; Zhang, P.; Kang, M.; Chen, F.; Yuan, Q. X.; Zhao, X. L.; Song, Y. Z.; Song, L. X. Revisiting silica networks by small-angle neutron scattering and synchrotron radiation X-ray imaging techniques. Chinese J. Polym. Sci. 2020, 38, 1006–1014

Xin-Wei Kang, Dong Liu, Ping Zhang, et al. Revisiting Silica Networks by Small-angle Neutron Scattering and Synchrotron Radiation X-ray Imaging Techniques[J]. Chinese Journal of Polymer Science, 2020, 38(9): 1006-1014.
Kang, X. W.; Liu, D.; Zhang, P.; Kang, M.; Chen, F.; Yuan, Q. X.; Zhao, X. L.; Song, Y. Z.; Song, L. X. Revisiting silica networks by small-angle neutron scattering and synchrotron radiation X-ray imaging techniques. Chinese J. Polym. Sci. 2020, 38, 1006–1014 DOI： 10.1007/s10118-020-2402-1.

Xin-Wei Kang, Dong Liu, Ping Zhang, et al. Revisiting Silica Networks by Small-angle Neutron Scattering and Synchrotron Radiation X-ray Imaging Techniques[J]. Chinese Journal of Polymer Science, 2020, 38(9): 1006-1014. DOI： 10.1007/s10118-020-2402-1.

摘要

Abstract

The silicone rubber composites present remarkable mechanical properties due to the double network structure constructed with molecular network of matrix and filler network 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 highly associated 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.

关键词

Keywords

references

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