Surface modification of sodium caseinate films by zein coatings
Surface modification of sodium caseinate films by zein coatings
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玉米醇溶蛋白涂层对酪蛋白酸钠薄膜进行表面改性
DOI：
10.1016/j.foodhyd.2013.08.027
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发表时间：
2014-05
影响因子：
10.7
通讯作者：
Lei-Yan Wu
中科院分区：
文献类型：
--
作者：
Shao-Hong Wen;Zhuo Chen;Bang-jie Xiao;Lei-Yan Wu
本研究的目的是通过直接包覆法和结构转化法提高玉米醇溶蛋白酪蛋白酸钠(SC)膜的阻隔能力。研究了玉米醇溶蛋白涂层对薄膜阻隔性能(氧气和水蒸气)和表面性能(表面疏水性、表面自由能和表面形貌)的影响。玉米醇溶蛋白涂层提高了SC膜的表面疏水性，表面自由能的极性参数(γAB)从11.5mJ/m2降至3.4mJ/m2，而非极性参数(γLW)从25.3mJ/m2增加到32.1mJ/m2。相反，直接包衣玉米醇溶蛋白呈现出相反的模式。玉米醇溶蛋白涂层增加了SC薄膜的表面粗糙度，结构反转方法导致了表面明显的不规则性和高度不规则的凸起，而通过直接沉积的方法得到了均匀分布的玉米醇溶蛋白纳米球。结构转化法制备的玉米醇溶蛋白涂层提高了SC膜对水蒸气和氧气的阻隔性，而直接包覆法只降低了膜的透氧率(OP)。这些数据表明，在不同的条件下，玉米醇溶蛋白在SC膜表面的亲水和疏水部分可能存在排列和取向。提出了玉米醇溶蛋白涂层在SC膜上形成过程的示意图，并将其与膜的阻隔性和表面性质联系起来。
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 (γAB) of surface free energy (γ) decreased from 11.5 to 3.4 mJ/m2, whilst apolar parameter (γLW) ofγincreased from 25.3 to 32.1 mJ/m2. 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.
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DOI：
10.5860/choice.41-0674
发表时间：
1970-02
期刊：
--
影响因子：
--
作者：
J. Kroschwitz;H. Mark
通讯作者：
J. Kroschwitz;H. Mark
影响因子：
3.1
作者：
Horne, DS
通讯作者：
Horne, DS
影响因子：
9.5
作者：
J. A. Q. Gallo;F. Debeaufort;F. Callegarin;A. Voilley
通讯作者：
J. A. Q. Gallo;F. Debeaufort;F. Callegarin;A. Voilley
影响因子：
3.8
作者：
Kim, S.;Xu, J.
通讯作者：
Xu, J.
影响因子：
5.5
作者：
S. Ou;K. Kwok;Yu-Ra Kang
通讯作者：
S. Ou;K. Kwok;Yu-Ra Kang