Interactions between fibroin and sericin proteins from Antheraea pernyi and Bombyx mori silk fibers.
Silkworm silk fibers are core-shell composites of fibroin and sericin proteins. Studying the interactions between fibroin and sericin is essential for understanding the properties of these composites. It is observed that compared to the domestic silk cocoon Bombyx mori (B. mori), the adhesion between fibroin and sericin from the wild silk cocoon, Antheraea pernyi (A. pernyi), is significantly stronger with a higher degree of heterogeneity. The adsorption of A. pernyi sericin on its fibroin is almost twice the value for B. mori sericin on fibroin, both showing a monolayer Langmuir adsorption. (1)H NMR and FTIR studies demonstrate on a molecular level the stronger interactions and the more intensive complex formation between A. pernyi fibroin and sericin, facilitated by the hydrogen bonding between glycine and serine. The findings of this study may help the design of composites with superior interfacial adhesion between different components.
Institute for Frontier Materials, Deakin University, Geelong 3216, Australia.
Shan
S
Du
Institute for Frontier Materials, Deakin University, Geelong 3216, Australia.
Jin
J
Zhang
Key Laboratory of Functional Textiles, Zhongyuan University of Technology, Zhengzhou 450007, China.
Wei T
WT
Zhou
Institute for Frontier Materials, Deakin University, Geelong 3216, Australia.
Quan X
QX
Li
Institute for Frontier Materials, Deakin University, Geelong 3216, Australia.
George W
GW
Greene
Institute for Frontier Materials, Deakin University, Geelong 3216, Australia.
Hai J
HJ
Zhu
Institute for Frontier Materials, Deakin University, Geelong 3216, Australia. Electronic address: jingliang.li@deakin.edu.au.
Jing L
JL
Li
Institute for Frontier Materials, Deakin University, Geelong 3216, Australia; School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430073, China. Electronic address: xungai.wang@deakin.edu.au.
Xun G
XG
Wang
D000818:Animals; D012831:Bombyx / Q000737:chemistry*; D005349:Fibroins / Q000737:chemistry*; D009036:Moths / Q000737:chemistry*; D010316:Particle Size; D011485:Protein Binding; D047030:Sericins / Q000737:chemistry*; D047011:Silk / Q000737:chemistry*; D013499:Surface Properties
D047030:Sericins; D047011:Silk; D005349:Fibroins
Fibroin; Interfacial adhesion; Sericin; Silk; Surface energy