Phase morphology, physical properties, and biodegradation behavior of novel PLA/PHBHHx blends
Phase morphology, physical properties, and biodegradation behavior of novel PLA/PHBHHx blends
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新型 PLA/PHBHHx 共混物的相形态、物理性能和生物降解行为
DOI：
10.1002/jbm.b.31915
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发表时间：
2012-01-01
影响因子：
3.4
通讯作者：
Kong, Deling
中科院分区：
文献类型：
--
作者：
Zhao, Qiang;Wang, Shufang;Kong, Deling
本研究将两种力学性能具有互补性的可生物降解聚酯[聚乳酸(PLA)和聚(3-羟基丁酸酯-3-羟基己酸酯)(PHBHHx)]进行了复合，并通过热复合法制备了一系列组成范围较广的共混物。用傅里叶变换红外光谱分析和扫描电子显微镜分析表征了相形态随组成变化的变化。系统地研究了聚乳酸/PHBHHx共混物的热性能、力学性能和生物降解性能。用理论模型进一步分析了共混物的力学性能，并与共混物的形态/结构和相容性的结果进行了关联。结果表明，共混物不相容，但在一定的组成范围内(如：PLA/PHBHHx(w/w)=80/20和20/80)有一定的相容作用。通过调整共混物的组成可以微调共混物的物理性能。(C)2011年威利期刊公司J生物材料资源B部分：APPL生物材料，2012年。
In this study, two biodegradable polyesters [i.e., polylactic acid (PLA) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx)] with complementarity in terms of mechanical performance have been combined, and a series of blends with a broad range of compositions has been prepared by thermal compounding. The evolution of phase morphologies with the variation of compositions has been characterized by using Fourier transform infrared spectroscopic imaging together with scanning electron microscope analyses. Thermal, mechanical, and biodegradation properties of the PLA/PHBHHx blends were systematically investigated. Mechanical properties were further analyzed by using theoretical models and correlated with the results of the morphology/structure and compatibility of the blends. Results indicate that PLA/PHBHHx blends are immiscible but can be compatible to some extent at certain compositions (e.g., PLA/PHBHHx (w/w) = 80/20 and 20/80). The physical properties of the blend could be fine tuned by adjusting the blend composition. (C) 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012.