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Characteristics of starch‐based films produced using glycerol and 1‐butyl‐3‐methylimidazolium chloride as combined plasticizers
Author(s) -
Ren Jiawei,
Zhang Weijian,
Lou Feipeng,
Wang Yuming,
Guo Weihong
Publication year - 2017
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.201600161
Subject(s) - plasticizer , glycerol , starch , crystallinity , chemical engineering , elongation , ultimate tensile strength , materials science , chemistry , thermal stability , glass transition , scanning electron microscope , polymer chemistry , nuclear chemistry , organic chemistry , composite material , polymer , engineering
The structure and property of cassava starch‐based films, produced by using 1‐butyl‐3‐methylimidazolium chloride ([BMIM]Cl) and glycerol as combined plasticizers, were investigated. The combined plasticizers exhibited a stronger effect on the disruption of starch granules compared with glycerol as observed by scanning electron microscopy (SEM). When the mass ratio of [BMIM]Cl/glycerol used was 15/15, all the starch granules were disrupted and transferred to a continuous phase. Due to the strong plasticization effect of [BMIM]Cl, the combined plasticizers contributed to a lower water content, crystallinity, and glass‐transition temperature, as well as a higher flexibility when compared with glycerol. Additionally, in spite of the slight decrease in the elongation at break, the combined plasticizers contributed to a higher thermal stability, higher tensile strength, and a lower cost relative to [BMIM]Cl alone, showing excellent potential for practical applications. Therefore, using [BMIM]Cl and glycerol as combined plasticizers to plasticize starch film is effective, practical, and economical, and opens up a new perspective for the plasticization of starch.