Preparation of degradable polypropylene by an addition of poly(ethylene oxide) microcapsule containing TiO2. Part III: Effect of existence of calcium phosphate on biodegradation behavior
Preparation of degradable polypropylene by an addition of poly(ethylene oxide) microcapsule containing TiO2. Part III: Effect of existence of calcium phosphate on biodegradation behavior
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DOI：
10.1016/j.polymdegradstab.2010.10.017
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发表时间：
2011-05-01
影响因子：
5.9
通讯作者：
Nakatani, Hisayuki
中科院分区：
文献类型：
--
作者：
Miyazaki, Kensuke;Shibata, Kazuto;Nakatani, Hisayuki
在这项工作中，通过氧化生物降解试验结合光降解处理（使用高压汞蒸气灯在30℃空气中照射24小时）和土壤埋藏试验（培养45天），研究了含有聚环氧乙烷（PEO）/改性TiO2微胶囊的新型聚丙烯（PP）复合材料的生物降解行为。 20 摄氏度）。通过合成插有琥珀酸离子的磷酸八钙(OCPC)对TiO2进行改性。微胶囊的存在带来了更高的PP光降解率和生物降解率。在光降解的PP复合材料中，观察到一些微生物的活性菌落。通过与未经OCPC改性的PP复合材料进行比较，发现微生物的活性行为是由于光降解过程中OCPC的溶解提供的无机磷酸盐所致。此外，复合材料中的光降解部分完全被微生物代谢。然而，微生物无法代谢其他部分，例如PP晶相。 (C) 2011 Elsevier Ltd. 保留所有权利。
In this work, biodegradation behavior of a novel polypropylene (PP) composite containing a poly (ethylene oxide) (PEO)/modified TiO2 microcapsule was studied with an oxo-biodegradation test combined with a photodegradation treatment (using a high-pressure mercury vapor lamp for 24 h of the irradiation at 30 degrees C in air) and a soil burial test (for 45 days of incubation at 20 degrees C). The modification of the TiO2 was performed by the synthesis of octacalcium phosphate intercalated with succinic acid ion (OCPC). The existence of the microcapsule brought about higher PP photo- and biodegradation rates. In the photodegraded PP composite, active colonies of some microorganisms were observed. By comparing with the PP composite without the OCPC modification, it was found that the active behavior of the microorganisms was due to the inorganic phosphates, which were supplied by the dissolution of the OCPC during the photodegradation. In addition, the photodegraded parts in the composite were completely metabolized by the microorganisms. However, the microorganisms had the inability to metabolize other parts such as the PP crystalline phase. (C) 2011 Elsevier Ltd. All rights reserved.