食品科学2018，Vol.39Issue(9)：39-46,8.DOI:10.7506/spkx1002-6630-201809007
魔芋胶-黄原胶复配体系流变学特性及其凝胶形成动力学分析
Rheological Properties and Gelation Kinetics of Konjac Gum-Xanthan Gum Mixtures
摘要
Abstract
In order to investigate the synergism between konjac gum and xanthan gum during gelation, we prepared 1% mixed gels with different konjac gum to xanthan gum ratios (2:8, 4:6, 5:5, 6:4, and 8:2) by mass. The rheological properties and gelation kinetics of the mixed system were determined, and the underlying mechanisms were explored. The results showed that the konjac gum-xanthan gum system was pseudoplastic. As the proportion of konjac gum increased, the consistency coefficient K increased and the fluid index n decreased. The dynamic viscoelastic properties were also changed with changing ratio between konjac gum and xanthan gum. When the ratio between konjac gum and xanthan gum was 6:4, the strongest pseudoplasticity and elasticity were observed as indicated by the highest K value and lowest n value. The rate of gelation was greatly affected by the ratio between two gums. Slow gelation rate and poor gel strength were found at a ratio smaller than 6:4. When the ratio was increased to 6:4, the gelation process was accelerated; the SDRa and G' curves rapidly rose and the gel strength was increased. However, the gelation rate was decreased with further increasing konjac gum/xanthan gum ratio. The kinetic data were well fitted to the Arrhenius equation with a determination coefficient greater than 0.98, indicating an excellent goodness of fit. The activation energy for the gelation process was significantly increased at a 6:4 ratio between konjac gum and xanthan gum (P < 0.05) and it differed in the high- and low-temperature ranges.关键词
魔芋胶-黄原胶/复配体系/流变学特性/凝胶形成/动力学分析Key words
konjac gum-xanthan gum/ mixed system/ rheological properties/ gel formation/ dynamic analysis分类
轻工纺织引用本文复制引用
曾瑞琪,李苇舟,赵欣,张甫生,郑炯..魔芋胶-黄原胶复配体系流变学特性及其凝胶形成动力学分析[J].食品科学,2018,39(9):39-46,8.基金项目
重庆市特色食品工程技术研究中心能力提升项目(cstc2014pt-gc8001) （cstc2014pt-gc8001）
重庆市功能性食品协同创新中心项目(167001) （167001）
中央高校基本科研业务费专项资金项目(XDJK2016B035 （）
SWU20161702001) （）
西南大学本科生创新基金项目(20161702001) （20161702001）
