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In situ generated silica reinforced polyvinyl alcohol/liquefied chitin biodegradable films for food packaging
Carbohydrate Polymers ( IF 11.2 ) Pub Date : 2020-03-18 , DOI: 10.1016/j.carbpol.2020.116182
Jie Zhang , Wen-Rong Xu , Yu-Cang Zhang , Xu-Dong Han , Chen Chen , Ao Chen

In previous report, polyvinyl alcohol/liquefied ball-milled chitin (PVA/LBMC) blend films with good antibacterial activity were successfully prepared. To further develop a biodegradable food packaging material, various amounts of nano-silica were introduced in situ by the hydrolysis of Na2SiO3 to give a series of silica-reinforced PVA/LBMC blend films. Their structure, morphology, mechanical and thermal properties, food preservation and degradation behavior in soil were comprehensively characterized. The results showed that when the content of Na2SiO3 was 0.2 wt%, the blend film 4PVA-LBMC-0.2Si displayed the optimized performance. Its tensile strength, and the maximum weight loss rate temperature reached 51 MPa and 307 ℃, respectively, which were significantly improved than those of silica-free film. The preservation tests of cherries showed its good fresh keeping performance. Although the degradation rate of silica-reinforced blend films in the soil was slightly decreased, it remained at a good level of 43% after 30 days of burial.



中文翻译:

用于食品包装的原位生成的二氧化硅增强聚乙烯醇/液化几丁质可生物降解薄膜

在以前的报告中,成功制备了具有良好抗菌活性的聚乙烯醇/液化球磨甲壳素(PVA / LBMC)共混膜。为了进一步开发可生物降解的食品包装材料,通过Na 2 SiO 3的水解就地引入了各种数量的纳米二氧化硅,从而制得了一系列二氧化硅增强的PVA / LBMC共混膜。他们的结构,形态,力学和热学性质,食物保存和降解行为在土壤中被全面表征。结果表明,当Na 2 SiO 3的含量混合膜4PVA-LBMC-0.2Si为0.2重量%时,显示出最佳性能。其抗张强度和最大失重率温度分别达到51 MPa和307℃,比无二氧化硅薄膜明显提高。樱桃的保存试验表明其具有良好的保鲜性能。尽管二氧化硅增强的混合膜在土壤中的降解率略有降低,但在埋葬30天后仍保持在43%的良好水平。

更新日期:2020-03-19
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