Biopolymeric antimicrobial films: study of the influence of hydroxypropyl methylcellulose, tapioca starch and glycerol contents on physical properties.
Biopolymeric antimicrobial films: study of the influence of hydroxypropyl methylcellulose, tapioca starch and glycerol contents on physical properties.
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DOI：
10.1016/j.msec.2013.11.043
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Ricardo A Espinel Villacrés;S. Flores;L. Gerschenson
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文献类型：
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作者：
Ricardo A Espinel Villacrés;S. Flores;L. Gerschenson
应用混合物设计方法研究了不同含量的木薯淀粉 (TS)、羟丙基甲基纤维素 (HPMC) 和甘油 (Gly) 对负载山梨酸钾 (KS; 0.3% w/w) 的生物聚合物膜物理性质的影响，旨在为防止食品表面污染的材料的开发做出贡献。对薄膜的机械性能、水蒸气渗透性（WVP）、水中溶解度（S）和颜色属性进行了评估。添加 HPMC 会增加弹性模量 (Ec)、断裂应力 (σb) 和 S。它还降低了黄色指数 (YI) 值和断裂应变 (εb)。使用含有 2.67 g/100 g TS、0.67 g/100 g HPMC、1.67 g/100 g Gly 和 0.3 g/100 g 的配方加深了研究KS，观察到它可以作为抵抗接合酵母外部污染的有效抗菌屏障。微观结构分析使我们得出结论，HPMC 与 TS 网络的结合降低了薄膜的粗糙度，同时还增加了氧气 (PO2) 的渗透性。
Mixture design methodology was applied to study the effect of different levels of tapioca starch (TS), hydroxypropyl methylcelullose (HPMC), and glycerol (Gly) on the physical properties of biopolymeric films supporting potassium sorbate (KS; 0.3% w/w) with the goal of contributing to the development of materials for preventing food surface contamination. Mechanical properties, water vapour permeability (WVP), solubility in water (S) and colour attributes were evaluated on the films. HPMC addition produced an increase of elastic modulus (Ec), stress at break (σb) and S. It also decreased the yellow index (YI) values and the strain at break (εb).The study was deepened using the formulation containing 2.67 g/100 g of TS, 0.67 g/100 g of HPMC, 1.67 g/100 g Gly and 0.3 g/100 g KS, observing that it behaved as an effective antimicrobial barrier againstZygosaccharomyces bailiiexternal contamination. Microstructural analysis allowed us to conclude that HPMC incorporation to a TS network decreased roughness of the films and it also increased permeability to oxygen (PO2).