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Shape memory effect of chitosan/glycerol composite film in mixed water/ethanol solution
Author(s) -
Zhang Dawei,
Yang Shuai,
Zhang Keke,
Zhou Guanglin,
Jiang Zaixing,
Gu Jiyou
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47037
Subject(s) - composite number , chitosan , molecule , materials science , hydrogen bond , chemical engineering , ethanol , aqueous solution , composite material , glycerol , thermal stability , polymer chemistry , chemistry , organic chemistry , engineering
In this paper, a chitosan (CS)/glycerol (GL) composite film was prepared, and the solution‐responsive feature of the composite film in a mixed water/ethanol solution was investigated. The composite film began to show obvious shape recovery behavior when the water content of the mixed solution was more than 50% v/v. In mixed solutions, when the molar ratio of water molecules and ethanol molecules was more than 2:1, apart from the combination with the ethanol molecules, the residual water molecules could interact with the CS molecules, promoting the formation of hydrogen bonds. The stress stored in CS molecules was released, and the shape memory effect of the composite film was triggered. In addition, the effect of water content in the mixed solutions on the structural, crystal, thermal stability and mechanical properties of the composite film was characterized. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47037.