壳聚糖-粘土基(CS-NaBNT)可生物降解纳米复合薄膜在食品和环境中的潜在应用

A. Laaraibi, Fatiha Moughaoui, Fouad Damiri, Amine Ouakit, I. Charhouf, Souad Hamdouch, A. Jaafari, AbdelmjidAbourriche, N. Knouzi, A. Bennamara, M. Berrada
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引用次数: 9

摘要

本工作的目的是设计用于食品包装应用的新材料,并利用虾外骨骼制备的壳聚糖(CS)对摩洛哥海洋废物进行估价。研究了分散在壳聚糖基体上的苯丙酮钠纳米颗粒制备的可生物降解、均匀的纳米复合膜。以蒙脱土为纳米填料,以醋酸水溶液为溶解分散壳聚糖和蒙脱土的介质。考察了双醛壳聚糖作为交联剂的存在性。利用FTIR, TGA, FEGSEM, TEM, XRD和拉伸测试研究了纳米复合膜的形貌,热行为和力学性能。XRD结果表明,膨润土含量低时形成插层状、脱落状纳米结构,膨润土含量高时形成插层状、絮凝状纳米结构。壳聚糖薄膜的塑性变形是在溶剂和增塑剂存在的情况下使用热机械处理进行的。由于壳聚糖嵌入硅酸中,得到的纳米复合膜具有良好的抗拉强度,这是食品包装应用所需要的一种有趣的力学性能。这些由天然环状材料制成的纳米复合薄膜可能在食品和环境科学的高级研究中发挥重要作用。通过溶液铸造技术,并具有特殊的结构,力学和力学性能。用纯化的膨润土(BNT)制备了壳聚糖/膨润土薄膜、壳聚糖/甘油/膨润土薄膜和壳聚糖/甘油/膨润土/精油纳米复合材料,根据所采用的工艺,它们可能比其他包装材料更便宜。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Chitosan-Clay Based (CS-NaBNT) Biodegradable Nanocomposite Films for Potential Utility in Food and Environment
The aim of this work is to design newer material for food packaging applications and to valorize the Moroccan marine wastes using chitosan (CS) prepared from exoskeletons of shrimps. Biodegradable and uniform nanocomposite films developed from sodium ben - tonite nanoparticles dispersed in chitosan matrix were carefully studied. The montmorillonite is used as nanofiller, and aqueous acetic acid solution is employed as a medium for dissolving and dispersing chitosan and montmorillonite. The existence of dialdehyde chitosan as cross-linking agent was examined. Morphology, thermal behavior, and mechani - cal properties of the nanocomposite films have been studied using FTIR, TGA, FEGSEM, TEM, XRD, and a tensile test. The XRD results indicate the formation of an intercalated and exfoliated nanostructure at low bentonite content and an intercalated and flocculated nanostructure at high bentonite content. Plastic deformation of the chitosan film is carried out using a thermomechanical treatment in the presence of a solvent and a plasticizer. The nanocomposite films obtained show a good tensile strength due to the reinforcement of chitosan intercalation in the silicate, which is an interesting mechanical property needed for food packaging applications. These nanocomposite films made from naturally occur - ring materials might play an important role in advanced research in food and environmental science. by the solution casting technique and characterized with particular regard to structural, ther -mal, and mechanical properties. Films of chitosan/bentonite, chitosan/glycerol/bentonite, and chitosan/glycerol/bentonite/essential oil nanocomposites were prepared with purified bentonite (BNT), and according to the process used, they might be less expensive than other packaging materials.
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