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设计可持续的聚合物混合物:在海水环境中定制PHB/PLA/PCL混合物的机械性能和降解行为

Leonardo G Engler^1,2, Naiara C Farias¹, Janaina S Crespo^1,2

¹PRISM Research Institute, Technological University of the Shannon: Midlands Midwest, Athlone Campus, University Road, N37 HD68 Athlone, Ireland.

|July 14, 2023

概括

混合可生物降解的聚合物,如聚乳酸 (PLA),聚基酸 (PHB) 和聚烯酸 (PCL),以适应机械和海水降解特性,用于包装和医疗器械.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
环境科学环境科学

背景情况:

生物降解聚烯对于可持续的包装和医疗器械至关重要.
常见的聚烯,如聚乳酸 (PLA),聚基酸 (PHB) 和聚烯 (PCL),在降解配置上存在限制.
这些聚合物的定制性能对于更广泛的应用是必不可少的.

研究的目的:

为了研究混合生物降解聚的机械和降解特性.
评估海水退化机制和影响因素.
通过混合来确定定制聚合物特性的潜力.

主要方法:

使用不同比例的PLA,PHB和PCL制备聚合物混合物.
机械测试,以评估拉伸强度和灵活性.
沉浸在海水中的研究,以评估通过减肥和侵蚀机制 (表面和散装) 的降解.

主要成果:

混合物表现出量身定制的机械性能,在添加PHB和PCL时灵活性增加.
拉伸强度因混合物组成而异,从纯PLA (67 MPa) 降至25.5 MPa,在特定混合物中降至18 MPa.
海水降解涉及水解,酶,氧化和物理路径,观察到体重损失高达10% (PCL) 和6% (PHB).

结论:

混合生物降解聚烯有效地改变了机械和降解特性.
这项研究证明了可调节的特性,可用于包装和医疗领域的各种应用.
建议对兼容剂进行进一步的研究,以提高可混合性和性能.

关键词:

可生物降解的混合物.聚基酸 (PHB) 是一种酸.聚乳酸 (PLA) 是一种聚乳酸.聚卡普罗拉克 (PCL) 是一种海水退化的恶化.热降解降解的热性降解

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