ABSTRACT

In this study, bio-nanocomposites of chitosan (CS)/glycerol (Gly)/cellulose nanofibers (CNF) were prepared using the solvent casting method. Effects of Gly and CNF content on properties of nanocomposites were investigated by the FTIR, SEM, tensile, TGA, swelling test, solubility analysis, water vapour permeability and contact angle measurements. Results showed that solubility of the CS-Gly films was sharply decreased by increasing Gly content. Also, plastic-like behaviour of the films was disappeared and they achieved a quasi-elastomeric structure by increasing the amount of Gly in the CS films. Elongation at the break was increased by increasing Gly content from 23% to 94% for CS-0%Gly to CS-20%Gly. Young’s modulus of the films was increased from 1.45 to 3.46 MPa by increasing CNF content from 0 to 0.5 wt.%. Thus, it was concluded that improvement of barrier and mechanical properties is correlated with both nanostructure of CNFs and the interactions between CS, CNFs and Gly.

摘要

在这项研究中，使用溶剂浇铸法制备了壳聚糖（CS）/甘油（Gly）/纤维素纳米纤维（CNF）的生物纳米复合材料。通过FTIR、SEM、拉伸、TGA、溶胀试验、溶解度分析、水蒸气渗透性和接触角测量研究了Gly和CNF含量对纳米复合材料性能的影响。结果表明，随着 Gly 含量的增加，CS-Gly 薄膜的溶解度急剧下降。此外，薄膜的类塑料行为消失了，它们通过增加 CS 薄膜中 Gly 的量实现了准弹性体结构。对于 CS-0%Gly 至 CS-20%Gly，通过将 Gly 含量从 23% 增加到 94% 来增加断裂伸长率。通过将 CNF 含量从 0 增加到 0.5 wt.%，薄膜的杨氏模量从 1.45 增加到 3.46 MPa。因此，