Rheological behavior of cellulose/silk fibroin blend solutions with ionic liquid as solvent

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• 作者：Yongbo Yao (1)
  Kanukai Susan Mukuze (1)
  Yumei Zhang (1)
  Huaping Wang (1)
  
• 关键词：Cellulose ; Silk fibroin ; Ionic liquid ; Rheology ; Phase morphology
• 刊名：Cellulose
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：21
• 期：1
• 页码：675-684
• 全文大小：555 KB
• 作者单位：Yongbo Yao (1)
  Kanukai Susan Mukuze (1)
  Yumei Zhang (1)
  Huaping Wang (1)
  
  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, 201620, China
  
• ISSN：1572-882X

文摘

The rheological behavior of cellulose and silk fibroin blend in 1-butyl-3-methylimidazolium chloride was studied. The data from the rheological results was analyzed to understand the microstructure of the blend solutions. The viscosity and dynamic modulus of the blend solution decreased with increasing ratio of silk fibroin. While comparing the experimental results with the calculated data from the log-additivity rule, it is revealed that zero-shear viscosity, dynamic modulus show positive–negative deviations and a typical continuous–discrete type of morphology could be imaged. At lower shear rate, the change of phase morphology took place at the ratio of about 0.5 volume fraction of cellulose. However, the blend solution showed positive deviations for all cellulose/silk fibroin blend ratios at high shear rate, which indicates that the dispersion of cellulose and silk fibroin was improved under shear stress. The properties of cellulose/silk fibroin blends observed by Fourier transform infrared spectroscopy and scanning electron microcopy agreed with the result from rheology.