Wilpiszewska Katarzyna, Antosik Adrian Krzysztof, Schmidt Beata, Janik Jolanta, Rokicka Joanna
Department of Chemical Organic Technology and Polymeric Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology Szczecin, 70-322 Szczecin, Poland.
Polymers (Basel). 2020 Oct 22;12(11):2447. doi: 10.3390/polym12112447.
The carboxymethylated derivatives of starch (CMS) and cellulose (CMC) were used for film preparation. The infrared spectroscopy revealed that crosslinking via ester bridges with citric acid occurred between the two polysaccharide derivatives. The effect of polysaccharide derivatives ratio on physicochemical properties of prepared films was evaluated. Generally, the values of tested parameters (moisture absorption, surface roughness, and mechanical and thermal properties) were between the values noted for neat CMS or CMC-based films. However, the physicochemical properties of the system with equal CMS/CMC weight ratio diverged from this trend, i.e., the highest tensile strength, the highest Young's modulus (ca. 3.4 MPa and ca. 4.9 MPa, respectively), with simultaneously the lowest moisture absorption (18.5% after 72 h) have been noted. Such systems could potentially find application in agriculture or pharmacy.
淀粉（CMS）和纤维素（CMC）的羧甲基化衍生物用于制备薄膜。红外光谱显示，两种多糖衍生物之间通过与柠檬酸形成酯桥发生了交联。评估了多糖衍生物比例对制备薄膜物理化学性质的影响。一般来说，测试参数（吸湿率、表面粗糙度以及机械和热性能）的值介于纯CMS或基于CMC的薄膜所记录的值之间。然而，具有相等CMS/CMC重量比的体系的物理化学性质偏离了这一趋势，即，记录到了最高的拉伸强度、最高的杨氏模量（分别约为3.4 MPa和约4.9 MPa），同时吸湿率最低（72小时后为18.5%）。这样的体系可能在农业或制药领域找到应用。
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