基于玉米淀粉和热塑性壳聚糖的可生物降解聚合物共混物，通过挤出加工。
Biodegradable polymer blends based on corn starch and thermoplastic chitosan processed by extrusion.
机构信息
Programa de Pós-Graduação em Engenheira de Biomateriais, Universidade Federal de Lavras, Lavras 37.200-000, MG, Brazil.
Laboratório de Nanotecnologia Nacional de Agricultura (LNNA), Embrapa Instrumentação, São Carlos 13.560-970, SP, Brazil.
出版信息
Carbohydr Polym. 2016 Feb 10;137:452-458. doi: 10.1016/j.carbpol.2015.10.093. Epub 2015 Nov 2.
Blends of thermoplastic cornstarch (TPS) and chitosan (TPC) were obtained by melt extrusion. The effect of TPC incorporation in TPS matrix and polymer interaction on morphology and thermal and mechanical properties were investigated. Possible interactions between the starch molecules and thermoplastic chitosan were assessed by XRD and FTIR techniques. Scanning Electron Microscopy (SEM) analyses showed a homogeneous fracture surface without the presence of starch granules or chitosan aggregates. Although the incorporation of thermoplastic chitosan caused a decrease in both tensile strength and stiffness, films with better extensibility and thermal stability were produced.
采用熔融挤出法制备了热塑性玉米淀粉（TPS）和壳聚糖（TPC）共混物。研究了 TPC 在 TPS 基体中的加入以及聚合物相互作用对形态、热性能和力学性能的影响。通过 XRD 和 FTIR 技术评估了淀粉分子与热塑性壳聚糖之间可能存在的相互作用。扫描电子显微镜（SEM）分析表明，断裂面均匀，没有淀粉颗粒或壳聚糖聚集物。尽管加入热塑性壳聚糖会导致拉伸强度和刚性降低，但所制备的共混物薄膜具有更好的拉伸延展性和热稳定性。
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