Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 107, Issue -, Pages 2590-2597Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2017.10.142
Keywords
Silk fibroin; Graphene oxide; Rheology; Small-angle X-ray scattering; Aggregation structure
Funding
- National Natural Science Foundation of China [21674018]
- National Key Research and Development Program of China [2016YFA0201702/2016YFA0201700]
- Shanghai Education Development Foundation
- Shanghai Municipal Education Commission [15SG30]
- DHU Distinguished Young Professor Program [A201302]
- Fundamental Research Funds for the Central Universities
- Programme of Introducing Talents of Discipline to Universities [111-2-04]
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Considering the high biocompatibility of regenerated silk fibroin (RSF) and the good enhancement effect of graphene oxide (GO), various RSF/GO composite materials have been previously investigated, and found that GO plays a vital role in the fabrication of high-performance RSF/GO materials. However, its effects on the structure of RSF solution are unclear. Therefore, in this work, we studied the rheological and optical properties, as well as the aggregation behavior of concentrated RSF/GO solution in response to applied shear. The results demonstrated that the presence of GO sheets in RSF solution increased the shear resistance, while delayed the sol-gel transition. Moreover, GO sheets were not favorable to the formation of the ordered structures of RSF. The results from small angle X-ray scattering (SAXS) of RSF/GO solution also showed that the shear process promoted the formation of RSF/GO interface. The data also provided insights into the structural evolution within the mixture solutions, which can be beneficial to the future design and fabrication of nanofiller-reinforced high-performance materials. (C) 2017 Elsevier B.V. All rights reserved.
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