三倍体毛白杨EMCC蒸煮中木素结构变化  

Lignin Structural Changes During EMCC Pulping of the Triploid of Polulus Tomentosa

作　　者：刘玉[1] 詹怀宇[2] 陈嘉川[1] 傅其荣[3] Dimitris Argyropoulos 

机构地区：[1]山东轻工业学院山东省制浆造纸科学与技术重点实验室,山东济南250353 [2]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [3]美国北卡罗来纳州立大学木材与造纸科学系,罗利usa276958005

出　　处：《中国造纸学报》2008年第2期1-5,共5页Transactions of China Pulp and Paper

基　　金：山东省优秀中青年科学家奖励基金(2006BS08019);山东省自然科学基金(Y2007B13)资助项目

摘　　要：对我国北方阔叶木速生材三倍体毛白杨进行深度脱木素的改良硫酸盐法蒸煮(EMCC),得到EMCC纸浆。采用酶-弱酸解两段法从原料和EMCC纸浆中分离出原料木素和纸浆残余木素;采用酸析法从EMCC蒸煮黑液中分离出黑液溶出木素样品,再经弱酸水解得到纯的黑液溶出木素。通过凝胶渗透色谱(GPC)分析,对所得木素样品分别进行了相对分子质量的检测,分析了EMCC蒸煮过程中木素相对分子质量的变化。通过磷谱核磁共振^(31)P-NMR技术得出木素结构谱图,对原料木素、纸浆残余木素和黑液溶出木素结构中各官能团进行定量分析对比,研究木素结构在EMCC蒸煮过程中的变化规律。The Chinese Northern fast-growing hardwood-Triploid of Polulus Tomentosa was used as the raw material in this research. Modified EMCC pulping was carried out in the laboratory. The two-stage method was chosen as the isolation methods for the raw material hgnin and residual lignin preparation. The acid-precipitating method was used for the dissolved lignin isolation from the black liquor and the crude lignin was purified by mild-acidic hydrolysis. The lignin samples were tested by GPC, and the changes of molecular weight during EMCC pul- ping were studied and compared. The ^31 P-NMR spectra of different lignin samples were obtained and the functional groups within lignin were quantitatively analyzed and compared to discover the disciplines of lignin structures during EMCC pulping.

关 键 词：三倍体毛白杨 EMCC ^31p-NMR 木素结构变化 木素相对分子质量 

分 类 号：TS743.1[轻工技术与工程—制浆造纸工程]