A novel regenerated silk fibroin-based hydrogels with magnetic and catalytic activities

作者：Luo, Kun-yuan; Shao, Zheng-zhong^*

来源：Chinese Journal of Polymer Science, 2017, 35(4): 515-523.

DOI：10.1007/s10118-017-1910-0

• Natural polymer
• Silk
• Hydrogel
• Nanoparticle
• Magnetic and catalytic activity

A simple and facile synthetic methodology for fabricating the regenerated silk fibroin (RSF)-based hydrogel which consisted of the in situ generated magnetic ferriferous oxide (Fe3O4) was developed. Using the co-precipitation of Fe2+ and Fe3+ within the RSF-based hydrogel with 90% RSF and 10% HPMC (hydroxypropyl methyl cellulose), the as-prepared RSF/Fe3O4 hydrogel not only showed high strength of saturation magnetization, but also exhibited excellent catalytic activities. For example, with the assistant of 3,3',5,5'-tetramethylbenzidine (TMB), the RSF/Fe3O4 hydrogel could detect H2O2 at a concentration as low as 1 x 10(-6) mola (TM) L-1. In addition, the catalytic activities were able to be maintained for a long term under various conditions. These findings suggest that the RSF-based materials can be endowed with interesting properties, and have great potential for the applications in the fields of biotechnology and environmental chemistry.

• 出版日期2017-4
• 单位复旦大学; 聚合物分子工程国家重点实验室