Study of the combined effect of both clay and glycerol plasticizer on the properties of chitosan films
Study of the combined effect of both clay and glycerol plasticizer on the properties of chitosan films
复制标题
DOI：
10.1016/j.carbpol.2010.04.054
复制
发表时间：
2010-09-05
影响因子：
11.2
通讯作者：
Buonocore, Giovanna G.
中科院分区：
文献类型：
--
作者：
Lavorgna, Marino;Piscitelli, Filomena;Buonocore, Giovanna G.
采用溶液浇铸法制备了不同钠基蒙脱土含量的壳聚糖基纳米复合材料。研究了甘油和硅酸盐粘土对所得纳米复合材料的热性能、力学性能和阻隔性能的综合影响。相对于纯壳聚糖，含有10%（wt/wt）的Na-MMT的膜显示出，对于含有和不含有甘油的膜，分别降低了约30%和50%的水渗透性和增加了约120%和25%的拉伸强度。膜的阻隔性和力学性能的提高与膜的纳米结构以及壳聚糖、钠基蒙脱土和甘油之间的相互作用有关。XRD结果表明，在没有甘油的薄膜，表现出最好的阻隔性能，钠-蒙脱土叠层与他们的血小板平行于铸造表面。由于壳聚糖插层在硅酸盐层间的增强作用，甘油的加入使复合材料的力学性能最好。(C)2010爱思唯尔有限公司保留所有权利。
Chitosan-based nanocomposites at different sodium montmorillonite loadings, with and without glycerol as plasticizer, were produced by solution casting. The combined effect of glycerol and silicate clay on the thermal, mechanical and barrier properties of the obtained nanocomposites was investigated. Films containing 10% (wt/wt) of Na-MMT show, with respect to neat chitosan, reduced water permeability of about 30% and 50% and an increased tensile strength of about 120% and 25%, for films with and without glycerol, respectively. The improvement of barrier and mechanical properties was correlated both to the films nanostructure and to the interactions between chitosan, Na-MMT and glycerol. XRD results suggest that in films without glycerol, which exhibit the best barrier properties, the Na-MMT stacks lay with their platelets parallel to the casting surface. The nanocomposites obtained with addition of glycerol show the best mechanical properties due to the enhancement of chitosan intercalation in the silicate galleries. (C) 2010 Elsevier Ltd. All rights reserved.