利用椰子水生物合成CMC改性细菌纤维素  

Biosynthesis of CMC-Bacterial Cellulose with Coconut-water

作　　者：朱清梅[1] 冯玉红[1] 林强[1] 吴敏[1] 魏爱平[1] 

机构地区：[1]海南大学材料与化工学院海南优势资源化工材料应用技术教育部重点实验室,海南海口570228

出　　处：《精细化工》2010年第7期654-658,共5页Fine Chemicals

基　　金：国家自然科学基金项目(50763002);海南省自然科学基金项目(80605;20803);海南大学科研项目(hd09xm29;hd09xm72;hd09xm30)~~

摘　　要：以椰子水为培养基,于培养基中添加羧甲基纤维素(CMC)后培养木醋杆菌可制备羧甲基纤维素改性细菌纤维素(CMC-BC)。当添加6g/LCMC时,CMC-BC产量达到最大(10.41g/L),是纯BC产量(4.73g/L)的2.2倍。采用FTIR表征了产物结构;通过SEM、XRD、TGA研究了产物性能;并测试了产物的特性黏度与含水率。结果显示,利用椰子水所制备的CMC-BC缩短了培养时间(3d)。适量添加CMC〔ρ(CMC)=2～18g/L〕时,CMC-BC的聚合度增大,且具有较好热稳定性及较高含水率。CMC-BC还表现出较好的溶解性能。Using coconut-water as the main culture medium,carboxymethyl cellulose-bacterial cellulose（CMC-BC）materials were obtained by adding carboxymethyl cellulose（CMC）into the Acetobacter xylinum culture system.When 6 g/L CMC was added,the yeild of dried films in the medium（10.41 g/L）reached the maximum,was 2.2 times than the control medium（4.73 g/L）.The structure of the CMC-BCs was confirmed by FTIR.Their properties were determined by X-ray diffraction（XRD）,scaning electron microscopy（SEM）and thermogravimetric analysis（TGA）.The intrinsic viscosity and the water holding capacity of the pellicles were also measured.The results suggested that CMC-BCs produced with coconut-water had a shorter fermentation period（3 d）.When the concentrations of the added CMC were ranging from 2 g/L to 18 g/L,the CMC-BCs had a higher polymerization degree and superior properties such as good thermal stability and water holding capacity.CMC-BCs also exhibited the better solubility.

关 键 词：生物合成 细菌纤维素 木醋杆菌 羧甲基纤维素 椰子水 生物工程 

分 类 号：TQ352.79[化学工程]