Biodegradation in seawater of aliphatic polyesters
Biodegradation in seawater of aliphatic polyesters
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DOI：
10.1016/j.polymdegradstab.2019.06.006
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发表时间：
2019-08-01
影响因子：
5.9
通讯作者：
Kawasaki, Norioki
中科院分区：
文献类型：
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作者：
Nakayama, Atsuyoshi;Yamano, Naoko;Kawasaki, Norioki
为了利用可生物降解聚合物作为功能材料，重要的是充分利用其生物降解性。研究了PCL、PBSA和P3HB等脂肪族聚酯在海水中的生物降解。进行了海水BOD测定和现场试验。对于BOD测试，考察了潮汐、海水保存、采样地点、微生物数量和海水温度等因素。生物合成的P3HB和PHBHH通过BOD法显示出快速的生物降解性。对于合成聚酯，PCL也降解快。然而，PBSA是一种常见的可生物降解的聚合物在土壤中并不总是生物降解的BOD法与海水。PBS和PBAT表现出非常缓慢的生物降解。将溶剂流延膜浸入海中1.5 m的深度。4周后，P3HB膜的重量损失约为90%。相反，通过BOD法4周的生物降解率约为50%。合成聚酯也表现出明显的重量损失，在现场测试中，与BOD的结果。(C)2019爱思唯尔有限公司版权所有。
In order to utilize biodegradable polymers as a functional material, it is important to make the best use of their biodegradability. Biodegradation of aliphatic polyesters, such as PCL, PBSA and P3HB, in seawater was investigated. BOD test using seawater and field test were carried out. As for BOD test, several factors were investigated such as tide, preservation of seawater, sampling place, population of microorganism, and seawater temperature. Biosynthesized P3HB and PHBHH showed rapid biodegradation by BOD method. As for synthetic polyesters, PCL also degraded fast. However, PBSA which is a popular biodegradable polymer in soil was not always biodegraded by BOD method with seawater. PBS and PBAT showed much slow biodegradation. Solvent cast films were immersed in the sea at a depth of 1.5 m. After 4 weeks, the weight loss of P3HB film was about 90%. On the contrary, the biodegradation by BOD method for 4 weeks was around 50%. Synthetic polyesters also showed obvious weight loss in field test, in contrast to the BOD results. (C) 2019 Elsevier Ltd. All rights reserved.