生物可降解薄膜材料聚β-羟基丁酸的研究  

STUDIES ON THE BIODEGRADABLE FILM MARTERIAL POLY (β-HYDROXYBUTYRATE)

作　　者：刘芝兰[1] 张世炜[1] 卓仁禧[1] 

机构地区：[1]武汉大学

出　　处：《太阳能学报》1991年第3期290-294,共5页Acta Energiae Solaris Sinica

摘　　要：为了解决太阳能工程中广泛应用的塑料薄膜造成的环境污染,开发新的生物可降解薄膜材料已成为十分关注的问题。本文报道了通过培养褐色球形固氮菌(Azotobacter chroococcum)制备聚β-羟基丁酸薄膜材料的研究结果。所得产物熔点为184.5-188℃,以氯仿为溶剂及参比零点,测得[α]_(589)^(25)=-6.0°,30℃时,以氯仿为溶剂,以乌氏粘度剂测得其重均分子量(?)=350000,元素分析值与预定结构式计算值相符,红外光谱,H-NMR,^(13)C-NMR分析,证实了其聚酯的化学结构及立构规整的空间构型。A.chroococcum分别以十多种有机酸盐作碳源时,均能产生聚β-羟基丁酸,以乙酸钠作碳源时,其含量最高可达37.5％干菌体。In this paper,the preparation of poly(β-hydroxy-butyrate) by culturing Azotobac-ter chroococcum is described.The product's melting point is 184.5-188℃,specific optical rotation [a]589 25 is-6.0 (chloroform as solvent and reference zero).Its weight-average molecular weight M?is 350000.The chemical structure and regular configuration of the polyester have been confirmed with elementary analysis,IR-spectrum,H-NMR and 13G-NMR spectra.A chroococcum cells can take many organic acids as carbon source to accumulate poly (β-hydroxybutyrate) in nitrogen-free culture.When carbon source is sodium acetate,the content of product is 37.5% dry cell weight.

关 键 词：生物 薄膜材料 β-羟基丁酸 

分 类 号：TQ320.721[化学工程—合成树脂塑料工业]