己二酸
增塑剂
壳聚糖
极限抗拉强度
热重分析
材料科学
延伸率
水分
化学工程
食品包装
核化学
高分子化学
复合材料
化学
有机化学
食品科学
工程类
作者
Roberto Sole,Chiara Buranello,Alessandro Di Michele,Valentina Beghetto
标识
DOI:10.1016/j.ijbiomac.2022.04.181
摘要
In this paper we present a novel strategy to easily prepare biodegradable chitosan derived films as new packaging systems. Combination of chitosan, adipic acid and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methyl-morpholinium chloride (DMTMM) allowed to obtain high-performing cross-linked films. Biobased glycerol was employed as plasticizer. An in-depth study was performed on ten different samples in order to evaluate the role of DMTMM as cross-linking agent. Experimental data showed that 15 wt% of DMTMM enhanced moisture content and moisture uptake (10.42% and 11.11%), water vapor permeability (0.13 10-7 g m-1 h-1 Pa-1) and good UV barrier properties. Additionally, 30 wt% of DMTMM significantly increased the tensile strength of films up to 83 MPa and elongation at break values reached 39.7%. Thermogravimetric, IR, XRD and SEM analysis confirmed that physical-mechanical properties of the obtained films were considerably improved, due to cross-linking by DMTMM, demonstrating promising properties for packaging applications.
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