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Viscoelastic behavior and sol‐gel transition of cellulose/silk fibroin/1‐butyl‐3‐methylimidazolium chloride extended from dilute to concentrated solutions
Author(s) -
Yao Yongbo,
Yan Zhiyong,
Li Zhe,
Zhang Yumei,
Wang Huaping
Publication year - 2018
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24802
Subject(s) - fibroin , miscibility , materials science , viscoelasticity , rheology , cellulose , time–temperature superposition , polymer chemistry , chemical engineering , silk , composite material , polymer science , polymer , engineering
The viscoelastic behavior of cellulose/silk fibroin/1‐butyl‐3‐methylimidazolium chloride ([BMIM]Cl) extended from dilute to concentrated has been studied by rheology. When the blend ratio of cellulose/silk fibroin is 8/2 (w/w), the critical overlap (c*) and entangled concentration (c e ) of the solutions are 0.5 and 2 wt% at 20°C, respectively. Moreover, the failure of Cox‐Merz at high shear rates or frequencies indicates a two‐phase structure, and the miscibility was improved with the increase of cellulose/silk fibroin concentration, as determined by the time‐temperature superposition principle and Han plot. The effect of cellulose/silk fibroin concentration on the sol‐gel transition was also studied, the gelation temperature ( T gel ) can be obtained when the concentration is in the semidilute unentangled and entangled regimes. POLYM. ENG. SCI., 58:1931–1936, 2018. © 2017 Society of Plastics Engineers