期刊
FRONTIERS OF MATERIALS SCIENCE
卷 9, 期 4, 页码 382-391出版社
HIGHER EDUCATION PRESS
DOI: 10.1007/s11706-015-0314-8
关键词
silk; self-assembly; charge; nanostructure; nanofiber
资金
- National Basic Research Program of China (973 Program) [2013CB934400]
- National Natural Science Foundation of China [21174097, 81272106, 81271412]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Excellent Youth Foundation of Jiangsu Province [BK2012009]
- International S&T Cooperation Project of the Ministry of ST of China [2010DFR30850]
- Key Natural Science Foundation of the Jiangsu Higher Education Institutions of China [11KGA430002]
- Jiangsu Provincial Special Program of Medical Science [BL2012004]
Silk materials with different nanostructures have been developed without the understanding of the inherent transformation mechanism. Here we attempt to reveal the conversion road of the various nanostructures and determine the critical regulating factors. The regulating conversion processes influenced by a hierarchical charge distribution were investigated, showing different transformations between molecules, nanoparticles and nanofibers. Various repulsion and compressive forces existed among silk fibroin molecules and aggregates due to the exterior and interior distribution of charge, which further controlled their aggregating and deaggregating behaviors and finally formed nanofibers with different sizes. Synergistic action derived from molecular mobility and concentrations could also tune the assembly process and final nanostructures. It is suggested that the complicated silk fibroin assembly processes comply a same rule based on charge distribution, offering a promising way to develop silk-based materials with designed nanostructures.
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