文献类型：期刊文献

英文题名：Surface modification of sodium caseinate films by zein coatings

作者：Yin, Ye-Chong[1];Yin, Shou-Wei[1];Yang, Xiao-Quan[1];Tang, Chuan-He[1];Wen, Shao-Hong[1];Chen, Zhuo[2];Xiao, Bang-jie[2];Wu, Lei-Yan[3]

机构：[1]S China Univ Technol, Dept Food Sci & Technol, Res & Dev Ctr Food Prot, Guangzhou 510640, Guangdong, Peoples R China;[2]E China Univ Sci & Technol, Sch Biotechnol, Dept Food Sci & Technol, Shanghai 200237, Peoples R China;[3]JiangXi Agr Univ, Coll Food Sci & Engn, Nanchang 330045, Peoples R China

年份：2014

卷号：36

起止页码：1

外文期刊名：FOOD HYDROCOLLOIDS

收录：;EI(收录号：20233314540029);WOS:【SCI-EXPANDED(收录号:WOS:000327540500001)】；

基金：The authors thank for the financial support by the Fundamental Research Funds for the Central Universities (SCUT, 2012ZZ0082), Key Projects in the National Science & Technology Program during the Twelfth Five-year Plan Period (2013BAD18B10-4), the State Key Program of National Natural Science of China (no. 31130042), and Natural Science Foundation of Jiangxi, China (31260367).

语种：英文

外文关键词：Zein; Surface hydrophobicity; Surface free energy; Surface topography; Water vapor permeability; Oxygen permeability

摘要：The objective of this study was to improve the barrier ability of sodium caseinate (SC) films using corn zein via direct coatings and structural inversion approach. The effects of zein coatings on barrier properties (oxygen and water vapor) and surface properties (surface hydrophobicity, surface free energy and surface topography) of the films were extensively investigated. Zein coating via the structural inversion approach heightened surface hydrophobicity of SC films, and polar parameter (gamma(AB)) of surface free energy (gamma) decreased from 11.5 to 3.4 mJ/m(2), whilst apolar parameter (gamma(LW)) of gamma increased from 25.3 to 32.1 mJ/m(2). In contrast, direct coating of zein presented an opposite pattern. Zein coatings increased surface roughness of SC films, structural inversion approach led to apparent surface irregularities with high irregular projections, whereas the well-defined zein nanospheres were evenly distributed in film surface via direct depositing. Zein coatings produced via structural inversion approach enhanced the barrier of SC films against water vapor and oxygen, whereas the direct coating approach only decreased oxygen permeability (OP) of the films. The present data pointed to a possible arrangement and orientation of hydrophilic and hydrophobic moieties of zein on surface of SC films under different conditions. A schematic illustration of the formation pathway of zein coatings on SC films was proposed to relate it with barrier and surface properties of the films. (c) 2013 Elsevier Ltd. All rights reserved.