Interfacial Rheology of Natural Silk Fibroin at Air/Water and Oil/Water Interfaces

详细信息    查看全文

• 作者：Lijun Wang ; Hongen Xie ; Xiuying Qiao ; An Goffin ; Tom Hodgkinson ; Xuefeng Yuan ; Kang Sun ; Gerald G. Fuller
• 刊名：Langmuir
• 出版年：2012
• 出版时间：January 10, 2012
• 年：2012
• 卷：28
• 期：1
• 页码：459-467
• 全文大小：1038K
• 年卷期：v.28,no.1(January 10, 2012)
• ISSN：1520-5827

文摘

The interfacial viscoelastic behavior of natural silk fibroin at both the air/water and oil/water interfaces is reported. This natural multiblock copolymer is found to be strongly amphiphilic and forms stable films at these interfaces. The result is an interfacial layer that is rheologically complex with strong surface elastic moduli that are only slightly frequency-dependent. The kinetics of surface viscoelastic evolution are reported as functions of time for various concentrations of the spread films. Films deposited by Langmuir鈥揃lodgett deposition were studied by scanning electron microscopy (SEM) to reveal a fibrous structure at the interface. The production of stable O/W emulsions by silk fibroin further confirms the generation of the elastic films at the oil/water interfaces.