Abstract In this study, a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) modified with nano-montmorillonite biocomposite (MMT/PHBH) was fabricated by solution-casting method. The results showed that the addition of MMT increased the crystallinity and the number of spherulites, which indicated that MMT was an effective nucleating agent for PHBH. The maximum decomposition peak of the biocomposites moved to a high temperature and residue presented an increasing trend. The biocomposites showed the best thermal stability at 1 wt% MMT. Compared with PHBH, 182.5% and 111.2% improvement in elastic modulus and tensile strength were obtained, respectively. Moreover, the oxygen permeability coefficient and the water vapor permeability of MMT/PHBH biocomposites decreased by 43.9% and 6.9%, respectively. It was also found that the simultaneous enhancements on the crystallizing, thermal stability, mechanical, and barrier properties of biocomposites were mainly caused by the formation of intercalated structure between PHBH and MMT.

中文翻译：

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纳米蒙脱石生物复合材料改性聚(3-羟基丁酸酯-co-3-羟基己酸酯)的制备与表征

摘要 本研究采用溶液浇铸法制备了纳米蒙脱石生物复合材料（MMT/PHBH）改性的聚（3-羟基丁酸酯-co-3-羟基己酸酯）。结果表明，MMT的加入提高了结晶度和球晶数量，表明MMT是PHBH的有效成核剂。生物复合材料的最大分解峰移至高温，残留物呈增加趋势。生物复合材料在 1 wt% MMT 时表现出最好的热稳定性。与PHBH相比，弹性模量和拉伸强度分别提高了182.5%和111.2%。此外，MMT/PHBH 生物复合材料的氧气渗透系数和水蒸气渗透率分别降低了 43.9% 和 6.9%。