Research Progress on Degradation Performance of Biodegradable Materials in Water Environment

doi:10.19491/j.issn.1001-9278.2021.07.018

Abstract

Abstract:

This article reviews the current research status of the degradation performance of typical biodegradable materials in water environments， and introduces the degradation performance of poly（lactic acid）（PLA） polymer materials （PLA， PLA copolymers， PLA composite materials， etc.）， polyhydroxyalkanoates （PHA）， polycaprolactone （PCL）， polybutylene succinate （PBS）， poly（butylene adipate?ethylene terephthalate）（PBAT） and carbon dioxide copolymer in different water environments. Finally， summarizes the issues and development directions that biodegradable materials need to pay attention to in the future.

Key words: biodegradable material, water environment, poly（lactic acid）, polyhydroxyalkanoates, polycaprolactone, polybutylene succinate

CLC Number:

TQ325

LI Yuzhu, YAO Lihui, YE Shiqiang, LYU Guoyong, LIU Panpan, XU Longfei, QIU Dan. Research Progress on Degradation Performance of Biodegradable Materials in Water Environment[J]. China Plastics, 2021, 35(7): 103-114.

Figures/Tables 9

Fig.1. Hydrolysis mechanism of PLA

Fig.2. Gravimetric analysis of PLA at 23 ℃

样品	水解降解时间/d
样品	0	5	20	30
纤维素
PLLA
PLLA?纤维素（PLLA的MS为6.22）

Tab.1. Photographs of cellulose， PLLA and PLLA ?g? cellulose films before and after the hydrolytic degradation

Fig.3. Weight loss curves of PLA/PBAu block copolymer film

Fig.4. Residual rate， average mass of PLA，PLA/B， PLA/T and PLA/B/T composites versus different exposure days

Fig.5. Variation of weight loss with enzymatic hydrolytic time for neat P34HB and its blends

水体	细菌	盐度/%	温度	pH值	机械力
天然海水	有	26~28	环境温度	7.6?8.2	有
静态海水	有	26~28	室温	7.6?8.2	无
静态河水	有	0.38~0.41	室温	7.3?7.6	无
除菌蒸馏水	无	0.12	室温	6.98	无
除菌海水	无	26~28	室温	7.6?8.2	无
自制海水	无	30	室温	7.56	无

Tab.2. Conditions of various experimental water bodies

Fig.6. P（BS?CDL）weight loss curve of accelerated degradation of copolyester

Fig.7. Weight loss rate versus timefor PPCEA3 and PPC in PBS buffer solution

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