聚（L-丙交酯）共混物的制备及 Lentzea waywayandensis 的生物降解。
Preparation of poly(L-lactide) blends and biodegradation by Lentzea waywayandensis.
机构信息
Biotechnology Division, National Institute for Interdisciplinary Science and Technology, Trivandrum, Kerala, India.
出版信息
Biotechnol Lett. 2012 Nov;34(11):2031-5. doi: 10.1007/s10529-012-1005-5. Epub 2012 Jul 14.
As a biodegradable polyester, polylactide (PLA) has applications as a packaging material, in biomedical fields and tissue engineering. With the dual aim of improving its properties and biodegradability, PLA was blended with other polymers such as gum arabic, thermoplastic starch, microcrystalline cellulose, polyethylene glycol and polyhydroxy butyrate in 1:1 (w/w) by melt-blending technique. The thermal properties of the blends were compared with that of unblended PLA by thermo-gravimetric analysis. Biodegradation using Lentzea waywayandensis was in the order of PLA-gum arabic > PLA-thermoplastic starch > PLA(virgin) > PLA-microcrystalline cellulose > PLA-polyethylene glycol > PLA-polyhydroxy butyrate. Weight loss of 99 % (w/w) was noted within 4 days for PLA-thermoplastic starch and PLA-gum arabic blends.
聚乳酸（PLA）作为一种可生物降解的聚酯，在包装材料、生物医学领域和组织工程中有应用。为了提高 PLA 的性能和生物降解性，将 PLA 与其他聚合物（如阿拉伯胶、热塑性淀粉、微晶纤维素、聚乙二醇和聚羟基丁酸酯）以 1:1（w/w）的比例通过熔融共混技术进行共混。通过热重分析比较了共混物与未共混 PLA 的热性能。利用 Lentzea waywayandensis 进行的生物降解顺序为 PLA-阿拉伯胶>PLA-热塑性淀粉>PLA（原生）>PLA-微晶纤维素>PLA-聚乙二醇>PLA-聚羟基丁酸酯。PLA-热塑性淀粉和 PLA-阿拉伯胶共混物在 4 天内的失重率达到 99%（w/w）。
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