TY - JOUR
T1 - Non-Toxic Crosslinking of Starch Using Polycarboxylic Acids
T2 - Kinetic Study and Quantitative Correlation of Mechanical Properties and Crosslinking Degrees
AU - Shen, Li
AU - Xu, Helan
AU - Kong, Lingjuan
AU - Yang, Yiqi
N1 - Funding Information:
This research was financially supported by the Key Scientific and Technological Projects of Science and Technology Commission of Shanghai Municipality (12JC1400300), U.S. Department of Agriculture-National Institute of Food and Agriculture (Multistate Research Project S-1054 (NEB 37-037), Hatch Act), Nebraska Corn Board, and the Agricultural Research Division at the University of Nebraska-Lincoln.
Publisher Copyright:
© 2015, Springer Science+Business Media New York.
PY - 2015/8/27
Y1 - 2015/8/27
N2 - For the first time, kinetics of citric acid crosslinking of starch was studied, and mechanical properties of starch films were quantitatively correlated with crosslinked degrees and structures of polycarboxylic acids. To substitute toxic crosslinkers to improve the properties of bio-derived polymers, non-toxic polycarboxylic acids were widely used to improve the performance properties of starch-derived industrial products, and were proved effective. However, the mechanism of the reaction and relationship between crosslinking extents and performance properties of starch products had not been clarified. In this study, crosslinking of starch by polycarboxylic acids was verified, and logarithmic relationship between crosslinking degree and strength was elucidated. The polycarboxylic acids with more carboxyl groups could more effectively improve the tensile properties of starch films. In general, crosslinking using polycarboxylic acids might improve the mechanical properties of starch products in a controlled manner and thus could facilitate their industrialization.
AB - For the first time, kinetics of citric acid crosslinking of starch was studied, and mechanical properties of starch films were quantitatively correlated with crosslinked degrees and structures of polycarboxylic acids. To substitute toxic crosslinkers to improve the properties of bio-derived polymers, non-toxic polycarboxylic acids were widely used to improve the performance properties of starch-derived industrial products, and were proved effective. However, the mechanism of the reaction and relationship between crosslinking extents and performance properties of starch products had not been clarified. In this study, crosslinking of starch by polycarboxylic acids was verified, and logarithmic relationship between crosslinking degree and strength was elucidated. The polycarboxylic acids with more carboxyl groups could more effectively improve the tensile properties of starch films. In general, crosslinking using polycarboxylic acids might improve the mechanical properties of starch products in a controlled manner and thus could facilitate their industrialization.
KW - Citric acid
KW - Crosslink
KW - Kinetics
KW - Polycarboxylic acids
KW - Starch
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U2 - 10.1007/s10924-015-0738-3
DO - 10.1007/s10924-015-0738-3
M3 - Article
AN - SCOPUS:84946478669
SN - 1566-2543
VL - 23
SP - 588
EP - 594
JO - Journal of Polymers and the Environment
JF - Journal of Polymers and the Environment
IS - 4
ER -