Anbukarasu Preetam, Sauvageau Dominic, Elias Anastasia
Department of Chemical and Materials Engineering, University of Alberta, 9211 116 St NW, Edmonton, AB, T6G 1H9, Canada.
Sci Rep. 2015 Dec 7;5:17884. doi: 10.1038/srep17884.
Biodegradable polyhydroxybutyrate (PHB) films were fabricated using acetic acid as an alternative to common solvents such as chloroform. The PHB films were prepared using a solvent casting process at temperatures ranging from 80 °C to 160 °C. The crystallinity, mechanical properties and surface morphology of the films cast at different temperatures were characterized and compared to PHB films cast using chloroform as a solvent. Results revealed that the properties of the PHB film varied considerably with solvent casting temperature. In general, samples processed with acetic acid at low temperatures had comparable mechanical properties to PHB cast using chloroform. This acetic acid based method is environmentally friendly, cost efficient and allows more flexible processing conditions and broader ranges of polymer properties than traditional methods.
采用乙酸替代氯仿等常用溶剂制备了可生物降解的聚羟基丁酸酯（PHB）薄膜。通过溶液浇铸法在80℃至160℃的温度范围内制备PHB薄膜。对在不同温度下浇铸的薄膜的结晶度、力学性能和表面形貌进行了表征，并与以氯仿为溶剂浇铸的PHB薄膜进行了比较。结果表明，PHB薄膜的性能随溶液浇铸温度的变化而有很大差异。一般来说，在低温下用乙酸处理的样品与用氯仿浇铸的PHB具有相当的力学性能。这种基于乙酸的方法环境友好、成本低廉，与传统方法相比，具有更灵活的加工条件和更广泛的聚合物性能范围。
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