1. College of Material Science and Engineering, Fuzhou University, Fuzhou 350002, China 2. Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China 3. Department of Chemistry, Minjiang University, Fuzhou 350011, China
Abstract：Bagasse high boiling solvent lignin is a polymer prepared by high boiling solvent pulping process. In the IR spectra, the absorbance of HBS lignin at 1 700 and 1 328 cm-1 is present. It is showed that the nonconjugated carbonyl existed. The strong absorbance of UV spectra of HBS lignin is about 201 nm for n→π* electron transition, which indicates that the HBS lignin is an unsaturated polymer. Judged from the 1H NMR, the syringyl and guaiacyl group in the lignin is present. The element composition and the content of OCH3 group were investigated. The empirical C9-formula of the lignin is C9H9.79O2.58(OCH3)0.75 according to dealing with the experiment data. The weight-average molecular weight of the HBS lignin is 2 674 g·mol-1.
[1] JIANG Ting-da(蒋挺大). Lignin(木质素). Beijing: Chemistry Industry Press(北京：化学工业出版社)，2001. [2] Lü Xiao-jing, YANG Jun, WANG Di-zhen, et al(吕晓静，杨 军，王迪珍, 等). Chemical Industry and Engineering Progress(化工进展), 2001, 20(5): 10. [3] CHEN Yun-ping, CHENG Xian-su, FANG Hua-shu, et al(陈云平, 程贤甦, 方华书, 等). Journal of Cellulose Science and Technology(纤维素科学与技术), 2003，11(1)：19. [4] FANG Hua-shu, CHENG Xian-su, CHEN Yue-xian, et al(方华书, 程贤甦, 陈跃先, 等). Sugarcane(甘蔗), 2002, 9(4)：15. [5] CHENG Xiansu, CHEN Weijian, CHEN Yunping, et al. Chemical Research in Chinese Universities, 2004，20(2)：25. [6] LIN Wei, CHENG Xiansu, CAI Yuting, et al. Synthesis and Properties of HBS Lignin-modified Epoxy Resin. Preprints of Asia Polymer Symposium, Hangzhou, China, 2004. 228. [7] CHENG Xiansu, HUANG Sheng, WU Gengyun, et al. Preparation and Properties of HBS Lignin-Polyurethane. Preprints of Asia Polymer Symposium, Hangzhou, China, 2004. 226. [8] ZHAO Hua-rong, WANG Xiao-yan, CHEN Guan-hua, et al(赵花荣, 王晓燕, 陈冠华, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004, 24(11): 1338. [9] Scholze B, Meier D. Journal of Analytical and Applied Pyrolysis, 2001, 60: 41. [10] John Wiley & Sons, Inc. Encyclopedia of Polymer Science and Engineering(Volume 8). New York: Spring-Verlag, 1987. 843. [11] Vazquez G G, Antorrena G J, Freire S. Holzforschung, 1975, 51: 158. [12] SHEN Qi-rong, XU Yong, YANG Hong, et al(沈其荣，徐 勇，杨 红, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2005, 25(2): 211. [13] Chen-Loung Chen, Danielle Robert. Characterization of lignin by 1H and 13CNMR Spectroscopy, Methods in Enzymology. New York: Academic Press, 1988, Vol(161). 137. [14] Sun R C, Sun X F, Fowler P, et al. European Polymer Journal, 2002, 38: 1399. [15] Karl Freudenberg. The Constitution and Biosynthesis of Lignin. New York: Spring-Verlag, 1986.
