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.
出处
《精细化工》
EI
CAS
CSCD
北大核心
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)~~
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
biosynthesis
bacterial cellulose
Acetobacter xylinum
carboxymethyl cellulose
coconut-water
biological engineering
