聚丁二酸丁二醇酯薄膜的微生物降解与水溶性产物  

Microbial degradation of poly(butylene succinate) films and water soluble products

作　　者：许国光[1] 熊雯[1] 林炎群 屠美[1,2] 曾戎[1,2] 容建华[1,2] 赵剑豪[1,2] 

机构地区：[1]暨南大学理工学院材料科学与工程系,广东广州510632 [2]人工器官及材料教育部工程研究中心,广东广州510632

出　　处：《暨南大学学报（自然科学与医学版）》2015年第4期285-289,共5页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：广东省科技计划项目(2012B040301020);暨南大学大学生创新训练项目(Cx12171)

摘　　要：本实验研究了堆肥微生物对聚丁二酸丁二醇酯(PBS)薄膜的生物降解行为.微生物在薄膜表面大量黏附,发生降解后薄膜表面呈现孔洞结构.前2周扩散至介质的水溶性酸性产物使p H值从7.2迅速下降到3.8,并显著抑制微生物的生长.随着时间的延长,微生物对水溶性产物不断同化吸收,p H值逐渐回升,同时微生物的生长速率也不断加快,至第10周时微生物数量为初始时的5倍.超高效液相色谱-质谱联用技术分析表明,水溶性降解产物主要由1,4丁二醇(B)、丁二酸(S)以及其低聚物BS、BSB、SBS、BSBS、BSBSB、SBSBS组成.它们的含量受产物生成和产物被微生物同化吸收的协同作用影响.The microbial degradation of poly( butylene succinate) films by compost microorganisms was studied. poly( butylene succinate)-degrading microorganisms adhered to the film surface and initiated the biodegradation,leading to the formation of small holes on the surface. In the early two weeks,the medium p H value dramatically dropped from 7. 2 to 3. 8 due to the accumulation of soluble acid products that significantly inhibited the microorganism growth. However,with the assimilation of these soluble products by microbes,the p H value gradually increased and the microorganisms proliferated fast. At10 w,the density of microorganisms was about five times as the original seeding density. These soluble products were composed of 1,4-butanediol( B),succinic acid( S),and their oligomers BS,BSB,SBS,BSBS,BSBSB and SBSBS by UPLC-MS analysis. Their contents were synergistically affected by hydrolysis production and microbial assimilation.

关 键 词：聚丁二酸丁二醇酯 微生物降解 水溶性产物 超高效液相色谱-质谱 

分 类 号：O631.3[理学—高分子化学]