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首页> 外文期刊>Journal of Applied Polymer Science >Characterization of polyhydroxyalkanoate blends incorporating unpurified biosustainably produced poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
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Characterization of polyhydroxyalkanoate blends incorporating unpurified biosustainably produced poly(3-hydroxybutyrate-co-3-hydroxyvalerate)

机译：掺入未纯化的生物可持续生产的聚（3-羟基丁酸酯-co-3-羟基戊酸酯）的聚羟基链烷酸酯共混物的表征

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摘要

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) produced by mixed bacterial cultures derived from a cheese whey (CW) industrial by-product (unpurified PHBV; u-PHBV) was incorporated into commercial PHBV without previous purification or isolation processes. The presence of certain impurities was evident as investigated by scanning electron microscopy. The crystallinity of the polymer fraction was decreased by about 3% compared to the commercial PHBV. The onset of thermal degradation was not substantially affected by the incorporation of the u-PHBV fraction. A higher flexibility and elongation at break was mostly attributed to the increased contents in 3-hydroxyvalerate in the blends with increasing u-PHBV content. Water and D-limonene vapor permeability were not affected up to u-PHBV contents of 15 wt %. This study puts forth the potential use of unpurified PHBV obtained from mixed microbial cultures and grown from industrial by-products as a cost-effective additive to develop more affordable and waste valorized packaging articles. (C) 2015 Wiley Periodicals, Inc.
机译：由干酪乳清（CW）工业副产物（未纯化的PHBV; u-PHBV）衍生的混合细菌培养物生产的聚（3-羟基丁酸酯-共3-羟基戊酸酯）（PHBV）无需事先纯化或分离即可用于商业PHBV流程。如通过扫描电子显微镜调查的，某些杂质的存在是明显的。与商业PHBV相比，聚合物级分的结晶度降低了约3％。 u-PHBV馏分的掺入基本上不影响热降解的开始。较高的柔韧性和断裂伸长率主要归因于共混物中u-PHBV含量增加的3-羟基戊酸酯含量。 u-PHBV含量不超过15 wt％时，水和D-柠檬烯的蒸气渗透性不受影响。这项研究提出了从混合微生物培养物中获得的未纯化的PHBV的潜在用途，并从工业副产品中生长出的PHBV作为具有成本效益的添加剂，可以开发出价格更可承受且废弃的增值包装产品。 （C）2015年Wiley Periodicals，Inc.

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