Enhancing Effect of Glycerol on the Tensile Properties of Bombyx mori Cocoon Sericin Films

International Journal of Molecular Sciences

Haiping Zhang¹  Lianxia Deng¹  Mingying Yang¹  Sijia Min¹  Lei Yang¹ 

[1] Institute of Applied Bioresources, College of Animal Sciences, Zhejiang University, Hangzhou 310029, China;

关键词: glycerol;    sericin;    tensile strength;    ATR-FTIR;    secondary structure;   

DOI  :  10.3390/ijms12053170

来源: mdpi

【 摘 要 】

An environmental physical method described herein was developed to improve the tensile properties of Bombyx mori cocoon sericin films, by using the plasticizer of glycerol, which has a nontoxic effect compared with other chemical crosslinkers. The changes in the tensile characteristics and the structure of glycerolated (0–40 wt% of glycerol) sericin films were investigated. Sericin films, both in dry and wet states, showed enhanced tensile properties, which might be regulated by the addition of different concentrations of glycerol. The introduction of glycerol results in the higher amorphous structure in sericin films as evidenced by analysis of attenuated total reflection Fourier transform infrared (ATR-FTIR) spectra, thermogravimetry (TGA) and differential scanning calorimetry (DSC) curves. Scanning Electron Microscopy (SEM) observation revealed that glycerol was homogeneously blended with sericin molecules when its content was 10 wt%, while a small amount of redundant glycerol emerged on the surface of sericin films when its content was increased to 20 wt% or higher. Our results suggest that the introduction of glycerol is a novel nontoxic strategy which can improve the mechanical features of sericin-based materials and subsequently promote the feasibility of its application in tissue engineering.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.