摘要
为了了解生物可降解聚合物γ-聚谷氨酸(γ-PGA)乙酯与γ-聚谷氨酸苄酯的生物降解性能,采用枯草杆菌NX-2(Bacillus subtilis)、黑曲霉(Aspergillus niger)和土埋法对γ-PGA乙酯和γ-PGA苄酯的降解性能进行研究,用扫描电镜观察降解结果.结果表明:枯草杆菌对γ-PGA乙酯和γ-PGA苄酯的降解作用优于黑曲霉;相对厚度较大的薄膜,在枯草杆菌NX-2中缓慢降解;在黑曲霉中,γ-PGA乙酯的降解速率相对较慢,薄膜的形态没有发生变化;γ-PGA苄酯的降解性能优于γ-PGA乙酯.
In order to understand the bio-degradation characteritics of poly (γ-glutamic acid) ethyl ester and poly(γ-glutamic acid) benzyl esters. The B. subtilis NX-2 ,A. niger and soil burial test were used. Scanning electron microscopy(SEM) was also used to observe the biodegradability. Results showed that the degradation characteristics of poly ( γ-glutamic acid) ethyl ester and poly ( γ-glntamic acid) benzyl ester with B. subtilis NX-2 was better than that with A. niger. When the ester was a thick film, its degradation rate with B. subtilis NX-2 was a slow one, but with A. niger, the degradation rate of poly (γ-glutamic acid) ethyl ester was lower because of hardly any changes of the shape. The degradation characteristics of poly(γ-glutamic acid) benzyl ester were better than that of poly (γ-glutamic acid) ethyl ester.
出处
《南京工业大学学报(自然科学版)》
CAS
北大核心
2009年第4期22-26,共5页
Journal of Nanjing Tech University(Natural Science Edition)
基金
高校博士点基金资助项目(BK200502911001)
关键词
Γ-聚谷氨酸
γ-聚谷氨酸乙酯
γ-聚谷氨酸苄酯
生物降解
poly(γ-glutamic acid)
poly ( γ-glutamic acid) ethyl ester
poly ( γ-glutamic acid) benzylester
bio-degradation