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首页> 外文期刊>Journal of Polymers and the Environment >Antioxidant/Antimicrobial Film Based on Carboxymethyl Cellulose/Gelatin/TiO_2-Ag Nano-Composite
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Antioxidant/Antimicrobial Film Based on Carboxymethyl Cellulose/Gelatin/TiO_2-Ag Nano-Composite

机译：基于羧甲基纤维素/明胶/ TiO_2-AG纳米复合材料的抗氧化剂/抗菌膜

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摘要

Due to the environmental problems caused by the use of synthetic plastics in food packaging, it is necessary to replace them with biodegradable films. In this study, carboxyl methyl cellulose/gelatin composite modified with TiO2-Ag nanoparticles (CMC/Gel/TiO2-Ag) was prepared and its antioxidant, antimicrobial, mechanical, colorimetric and morphological characteristics were investigated. To evaluate the effect of gelatin percent and TiO2-Ag percentage on the film properties, a central composite design (CCD) was used. The morphology of the films was investigated by the scanning electron microscopy (SEM). SEM results showed that TiO2-Ag nanoparticles in the range of 50-100 nm were distributed among CMC polymers and gelatin. The antioxidant properties of the film showed that nanoparticles have anti-oxidant properties and can be very effective in preparing antioxidant films. The microbial test indicates antimicrobial activity of nanoparticles against Gram-negative bacteria (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria. According to the mechanical results, gelatin increases the film elasticity. TiO2-Ag increases the elongation and extension of CMC film and adding of gelatin to the CMC film decrease these parameters. Adding TiO2-Ag to the film increases the maximum force to break the film (F-max), but adding gelatin to the film decreases the F-max. Colorimetric results showed that gelatin increased transparency and TiO2-Ag reduced the transparency. According to the results, the simultaneous increase of gelatin and TiO2-Ag, increases a* parameter. With increasing TiO2-Ag nanoparticles, the whiteness index increased. The overall results obtained from this study show that, given the antimicrobial and antioxidant properties of silver and titanium dioxide and antioxidant properties of gelatin, the CMC/Gel/TiO2-Ag film has a very important antimicrobial and antioxidant properties and can be used as an active/antioxidant packaging system.
机译：由于在食品包装中使用合成塑料引起的环境问题，有必要用可生物降解的薄膜替换它们。在该研究中，制备了用TiO 2 -Ag纳米颗粒（CMC / GEL / TiO 2-AG）改性的羧基甲基纤维素/明胶复合物，并研究了其抗氧化剂，抗微生物，机械，比例和形态特征。为了评价明胶百分比和TiO2-Ag百分比对膜性能的影响，使用中央复合设计（CCD）。通过扫描电子显微镜（SEM）研究了薄膜的形态。 SEM结果表明，在CMC聚合物和明胶中分布了50-100nm范围内的TiO2-Ag纳米颗粒。薄膜的抗氧化性能表明纳米颗粒具有抗氧化剂性能，并且可以非常有效地制备抗氧化膜。微生物检测表明纳米颗粒对革兰阴性细菌（大肠杆菌）和革兰氏阳性（金黄色葡萄球菌）细菌的抗菌活性。根据机械效果，明胶增加了薄膜弹性。 TiO2-AG增加CMC膜的伸长和延伸，并将明胶加入CMC膜的降低这些参数。将TiO2-AG添加到膜上增加了破坏薄膜（F-MAX）的最大力，但将明胶添加到薄膜中降低F-Max。比色结果表明明胶增加了透明度，TiO2-Ag降低了透明度。根据结果​​，明胶和TiO2-AG的同时增加增加了*参数。随着TiO 2-Ag纳米颗粒的增加，白度指数增加。从本研究中获得的总体结果表明，鉴于银色和二氧化钛的抗微生物和抗氧化性能以及明胶的抗氧化性能，CMC /凝胶/ TiO2-Ag膜具有非常重要的抗微生物和抗氧化性能，可用作活性/抗氧化包装系统。

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