Biodegradation of biologically based polymer PHBV and PLA composites in different media and its influencing factors
CHEN Hai-yan1, WU Feng-chang1, WEI Yuan1, Andrea CORTI2, Emo CHIELLINI2, BAI Ying-chen1, FENG Wei-ying1, ZHANG Chen1
1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science 10012, Beijing, China;
2. ItalyBIO lab, INSTM Unit-Department of Chemistry and Industrial Chemistry, University of Pisa, 56122
The plastic production of traditional technology not only depends on the continuous development and utilization of petroleum resources, but also creates unprecedented pressure on the environment. In recent years biobased polymers (polybutyric acid valerate-PHBV, polylactic acid -PLA) have become an alternative to traditional petroleum based plastics. The research work by means of burial respirometry test to access biodegradation propensity in different media (soil, compost, river water) of bio-based packaging polymers such as poly (hydroxybutyrate-co-hydroxyvalerate) (PHBV), poly (lactic acid) (PLA) and their blends and composites loaded with fillers of organic (lignin), inorganic (montmorillonite named Dellite) nature and chain extenders (Joncryl). The results showed that 1)When the addition of extenders Joncryl was 5%, the result behaved the significantly inhibit effect on PHBV and PLA based composite samples in all media; 2)When the addition of Joncryl was 0.2%, it did not interfere with the Biodegradation Behavior of the samples; 3)In the mature compost, the biodegradation rate of PLA composites was significantly lower than that of the mixture of PHBV matrix; 4)Organic lignocellulosic additive (hazelnut shell powder) added to polymer alone or combined with chain extender Joncryl and non-organic additive (Dellite72T) can promote the compatible connectivity of PLA polymer; It concluded that new additive has an important effect on the biodegradation process by adding two or three phases in different media, the study will provide a theoretical basis for the biodegradation effect of the new material.
陈海燕, 吴丰昌, 魏源, Andrea Corti, Emo Chiellini, 白英臣, 冯伟莹, 张琛. 生物基聚合物PHBV和PLA复合材料在不同介质中的生物降解及其影响因素[J]. 中国环境科学, 2018, 38(7): 2706-2713.
CHEN Hai-yan, WU Feng-chang, WEI Yuan, Andrea CORTI, Emo CHIELLINI, BAI Ying-chen, FENG Wei-ying, ZHANG Chen. Biodegradation of biologically based polymer PHBV and PLA composites in different media and its influencing factors. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(7): 2706-2713.
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