Modulating interfacial dilatational properties by electrostatic sodium caseinate and carboxymethylcellulose interactions

文献类型： 外文期刊

第一作者： Liu, Liya

作者： Liu, Liya;Zhou, Sumei;Zhao, Qiangzhong;Zhao, Mouming;Zhao, Mouming

作者机构：

关键词： Sodium caseinate;Carboxymethylcellulose;Electrostatic interactions;Interface;Adsorption

期刊名称：FOOD HYDROCOLLOIDS （ 影响因子：9.147； 五年影响因子：9.169 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The interactions between sodium caseinate (NaCas) and carboxymethylcellulose (CMC) in aqueous solution influenced by pH and CMC concentration were assessed by visual observation, measuring turbidity, xi-potential, particle size and rheological tests. Effects of CMC on the interfacial dynamic properties of NaCas were investigated using an automatic pendant drop tensiometer. The results indicated that CMC adsorbed onto NaCas mainly through electrostatic interactions in solution at pH <= 5.5. and their interactions revealed a significant influence on the dynamic characteristics of NaCas adsorbed films. For surface pressure (pi) and surface dilatational modulus (E) values, they were both changed in response to the presence of CMC in the bulk phase at pH 5.5 and 4. Especially for the E values of films, which showed a continuous increase as function of CMC concentration. However, the presence of CMC in the bulk phase had no significant effect on the adsorption of NaCas molecules at pH 7, indicating the interface was dominated by the protein. (C) 2015 Elsevier Ltd. All rights reserved.

分类号： TS2

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