Oxo-biodegradable full carbon backbone polymers - biodegradation behaviour of thermally oxidized polyethylene in an aqueous medium
Oxo-biodegradable full carbon backbone polymers - biodegradation behaviour of thermally oxidized polyethylene in an aqueous medium
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DOI：
10.1016/j.polymdegradstab.2007.03.007
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发表时间：
2007-07-01
影响因子：
5.9
通讯作者：
D'Antone, Salvatore
中科院分区：
文献类型：
--
作者：
Chiellini, Emo;Corti, Andrea;D'Antone, Salvatore
近年来，已有多个研究表明，抗氧化剂活化聚乙烯(PE)在土壤中具有有效的生物降解作用。然而，要全面了解氧化生物降解聚乙烯材料氧化碎片在环境中的最终命运，需要将研究扩展到其他自然环境，特别是水介质(河流、湖泊、微咸水和海洋水域)，在这些介质中，意外的塑料垃圾和由此产生的降解碎片最终可能会结束。在这方面，作为我们在氧化生物可降解聚合物材料领域持续活动的一部分，在这篇论文中，我们希望报告正在进行的含有促氧化剂添加剂的热氧化低密度聚乙烯(LDPE)膜样品在水介质中的生物降解的研究结果。通过监测呼吸仪中随时间产生的二氧化碳的量来评估有效的生物降解性。在100天的时间框架内，检测到降解片段和用沸腾丙酮提取的相应部分的生物降解率分别高达12%和48%。(C)2007年由爱思唯尔有限公司出版。
Several demonstrations of the effective biodegradation in soil of pro-oxidant activated polyethylene (PE) have been reported recently. Nevertheless a comprehensive understanding of the ultimate fate in the environment of the oxidized fragments of oxo-biodegradable polyethylene materials needs the extension of the studies to other natural environments and in particular to aqueous media (river, lake, brackish and marine waters) where accidental plastic littering and the resulting degraded fragments eventually may end up.In this respect, as part of our continuing activity in the area of oxo-biodegradable polymeric materials, in the present paper we wish to report on the results attained in an ongoing investigation on the biodegradation in a water medium of thermally pre-oxidized low density polyethylene (LDPE) film samples containing pro-oxidant additives.Thermally oxidized LDPE-film samples and corresponding acetone extractable fractions were submitted to the effect of microorganism flora present in river water. The effective biodegradation was assessed by monitoring the amount of CO2 developed over time in a respirometer apparatus. Levels of biodegradation up to 12 and 48% for the degraded fragments and corresponding fractions extracted with boiling acetone were detected on a 100-day time frame. (C) 2007 Published by Elsevier Ltd.