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首页> 外文期刊>Journal of Polymers and the Environment >Preparation and Characterization of Polyhydroxyalkanoate Bioplastic-Based Green Renewable Composites from Rice Husk
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Preparation and Characterization of Polyhydroxyalkanoate Bioplastic-Based Green Renewable Composites from Rice Husk

机译：基于稻壳的聚羟基链烷酸酯生物塑料基绿色可再生复合材料的制备与表征

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摘要

The biodegradability, morphology, and mechanical properties of composite materials consisting of acrylic acid-grafted poly(hydroxyalkanoate) (PHA-g-AA) and rice husk (RH) were evaluated. Composites containing PHA-g-AA (PHA-g-AA/RH) exhibited noticeably superior mechanical properties compared with those of PHA/RH because of greater compatibility with RH. The dispersion of RH in the PHA-g-AA matrix was homogeneous because of ester formation and the consequent creation of branched and cross-linked macromolecules, between the carboxyl groups of PHA-g-AA and hydroxyl groups in RH. The water resistance of PHA-g-AA/RH was higher than that of PHA/RH, although the weight loss of composites buried in soil compost indicated that both were biodegradable, especially at high levels of RH substitution. After 60 days, the weight loss of the PHA-g-AA/ RH (40 wt%) composite was greater than 90 %. PHA/RH exhibited a weight loss of approximately 4-8 wt% more than PHA-g-AA/RH. The PHA/RH and PHA-g-AA/RH composites were more biodegradable than pure PHA, which implies a strong connection between RH content and biodegradability.
机译：评价了由丙烯酸接枝的聚（羟基链烷酸酯）（PHA-g-AA）和稻壳（RH）组成的复合材料的生物降解性，形态和机械性能。与PHA / RH相比，含PHA-g-AA的复合材料（PHA-g-AA / RH）表现出明显优越的机械性能，因为它与RH的相容性更好。 RH在PHA-g-AA基质中的分散是均匀的，这是因为形成了酯并因此在RH中的PHA-g-AA的羧基和羟基之间产生了支链和交联的大分子。 PHA-g-AA / RH的耐水性高于PHA / RH，尽管埋在土壤堆肥中的复合材料的失重表明这两种材料都是可生物降解的，尤其是在高水平的RH替代下。 60天后，PHA-g-AA / RH（40wt％）复合材料的重量损失大于90％。与PHA-g-AA / RH相比，PHA / RH的重量减轻了约4-8 wt％。 PHA / RH和PHA-g-AA / RH复合材料比纯PHA具有更高的生物降解性，这意味着RH含量与生物降解性之间有很强的联系。

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