水溶性改性细菌纤维素的制备及表征Synthesis and Characteristics of Modified Bacterial Cellulose
朱平,赵晓霞,王敏,董朝红
ZHU Ping1,2,ZHAO Xiao-xia2,3
摘要(Abstract)：
将细菌纤维素再生后溶于NaOH/尿素/硫脲溶液,在碱性条件下与丙烯酰胺合成水溶性的改性细菌纤维素。红外光谱、元素分析和核磁共振谱图证实了改性细菌纤维素的存在。研究表明:当葡萄糖与丙烯酰胺摩尔比大于1:4.6时,反应产物是水溶性的;当葡萄糖与丙烯酰胺摩尔比为1:8时,产物的羟基总取代度约为0.412～0.502。
Modified bacterial cellulose derivatives containing acylamino and carboxyl groups were synthesized from regenerated bacterial cellulose with acrylamide in NaOH/urea/thiourea aqueous solutions.The structure and solution properties of the modified bacterial cellulose were characterized with elemental analysis,FTIR and NMR.When the mole ratio of anhydroglucose unit(AGU) to acrylamide was above 1:4.6,they were soluble.Total degree of substituent was about 0.412～0.502,when the mole ratio of AGU to acrylamide was 1:8.
关键词(KeyWords)：
细菌纤维素;丙烯酰胺;改性;水溶性;取代度
bacterial cellulose,acylamino,modified,solubility,degree of substituent
基金项目(Foundation): 国家自然科学基金资助(编号50773032)
作者(Author):
朱平,赵晓霞,王敏,董朝红
ZHU Ping1,2,ZHAO Xiao-xia2,3
参考文献(References)：
- [1]余冰,周红丽.细菌纤维素的研究进展[J].生物技术通报,2007,(2):87-90.
- [2]Krystynowicz A,W Czaja,et al.Factors affecting the yield and properties of bacterial cellulose[J].Journal of Industrial Microbiology&Biotechnology,2002,29:189-195.
- [3]王先秀.新型的微生物合成材料——醋酸菌纤维素[J].中国酿造,1999(,1):1-2.
- [4]Yamanaka S,Watanabe K,Kitamura,et al.The structure and mechanical properties of sheets prepared from bacterial cellulose[J].J Master Sci,1989,24:3141-3145.
- [5]马承铸.生物有机纳米材料——细菌纤维素[J].精细与专用化学品,2001,(18):14-16.
- [6]余晓斌,卞玉荣,全文海.细菌纤维素的商业化用途[J].纤维素科学与技术,1999,7(3):42-46.
- [7]Iguchi M,S Yamanska,A Budhiono.Review bacterial cellulose——a masterpiece of nature's art[J].Journal of Materials Science,2000,35:261-270.
- [8]王敏,朱平,赵晓霞,董朝红.细菌纤维素在LiCl/DMAc溶剂体系中的溶解性能研究[J].合成纤维,2008,37(6):20-23.
- [9]赵晓霞,朱平,王敏,董朝红.再生细菌纤维素在NaOH/尿素/硫脲溶剂体系中的溶解性能研究[J].天津工业大学学报,2008,27(5):28-32.
- [10]Dawsey T R,McCormick C L.The lithium chloride/dimethylacetamide solvent for cellulose:A literature review[J].Journal of Macromolecular Science-Reviews in Macromolecular Chemistry and Physics,1990,C30(3-4):405-440.
- [11]Cai J,Zhang L,et al.Novel fibers prepared from cellulose in NaOH/urea aqueous solution[J].J Macromolecular Rapid Communications,2004,25(17):1558-1562.
- [12]Yongbo Song,Jinping Zhou,et al.Honogenous modification of cellu-lose with acrylamide in NaOH/urea aqueous solutions[J].J Carbohydrate Polymers,2008,(73):18-25.
- [13]Klemm D,Philipp B,et al.Comprehensive cellulose chemistry.Functionalization of cellulose[M].Verlag GmbH,Weinheim:WILWY-VCH.1998:2.