期刊
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
卷 21, 期 15, 页码 1469-1481出版社
BRILL ACADEMIC PUBLISHERS
DOI: 10.1163/156856107782844756
关键词
adhesion strength; esterification; protein modification; SDS-PAGE; solubility; soy protein; thermal property; water resistance
The objective of this research was to study the effects of preheating treatment and thermal-setting temperature on the thermal properties and adhesion performance of esterified and cross-linked soy protein isolates. Preheating treatment was achieved by heating a soy protein isolate suspension (5% solid) for 20 min at 60, 80, 110 or 130 degrees C. Thermal-setting temperatures of 130, 160, 190 and 220 degrees C were achieved by adjusting the temperature of the hot press. Differential scanning calorimetry and sodium dodecyl sulfate-polyacrylamide gel electrophoresis were used to determine changes in the protein structure before and after preheating treatment. Preheating treatment had a significant effect on protein structure and adhesion performance. Adhesion strength of control and esterified soy protein isolates reached maximum at 80 degrees C preheating temperature. Severe preheating (over 110 degrees C) caused complete denaturation of proteins and loss of their native structure and was, therefore, detrimental to adhesion performance. Thermal-setting temperature also had a significant effect on protein structure and wet strength of the soy protein isolates. Wet adhesion strength of unmodified, esterified, and cross-linked soy protein isolates increased by 170%, 128% and 80%, respectively, as the thermal-setting temperature increased from 130 to 220 degrees C.
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