文献类型：期刊文献

英文题名：Soil burial biodegradation of antimicrobial biodegradable PBAT films

作者：Wang, Hao[1];Wei, Dafu[1,2];Zheng, Anna[2];Xiao, Huining[1]

机构：[1]Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada;[2]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：116

起止页码：14

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20151400709968);WOS:【SCI-EXPANDED(收录号:WOS:000355348800002)】；

基金：The authors would like to thank the NSERC Sentinel-Bioactive Paper Network (Canada), NSERC Green Wood Fiber Network (Canada) and AIF/Al-Pack Co. (Canada) for funding this work.

语种：英文

外文关键词：Soil burial; Biodegradable polyester; PBAT; Polyhexamethylene guanidine; hydrochloride; Antimicrobial property; Thermoplastic starch

摘要：Recently, biodegradable polymers have been broadly used in various applications, including antimicrobial biodegradable composite materials. However, the biodegradability of such polymers in the presence of antimicrobial agents has barely been investigated. Moreover, whether the antimicrobial property of the material would be compromised or affected by the microorganisms in the soil is still unclear. In this work, the biodegradation behavior and antimicrobial property of the novel antimicrobial biodegradable poly(butylene adipate-co-terephthalate) (PBAT)/thermoplastic starch films before and after a three-month soil burial test have been investigated. The weight retention data showed that both PBAT and starch were still able to degrade even in the presence of the antimicrobial substance, polyhexamethylene guanidine hydrochloride (PHGH). However, the biodegradation rate was retarded. The antimicrobial films exhibited excellent growth inhibition against E. coli before biodegradation test. The film with the coupling agent 2,2'-(1,3-phenylene)-bis(2-oxazoline) (PBO) and less starch content presented a growth inhibition over 99% even after the three-month biodegradation test, due to a better PHGH retention. The semi-crystalline PBAT did not show any significant crystal structure change in the DSC analysis. Both SEM images and mechanical properties demonstrated the biodegradation of the films from the macro-scale. (C) 2015 Elsevier Ltd. All rights reserved.