摘要
经润胀处理后的微晶纤维素,在β-葡萄糖甙酶、葡萄糖氧化酶及过氧化物酶存在下,与松柏醇葡萄糖甙发生聚和反应得到木素-纤维素复合体(DHPCC)。用高分辨率CP/MAS13C-NMR分析常规DHPCC和侧链α位被13C标记的DHPCC-13C时发现,DHPCC中木素结构单元以-βO-4、β-β、β-5和β-1方式连接为主,还含有少量的松柏醇结构和肉桂醇结构;DHPCC中木素与纤维素之间以苯甲醚键、苯甲酯键及缩醛键连接,其中,缩醛键与酯键可能为主要的连接方式。
DHP-Cellulose complexes （DHPCC） were prepared through polymerization of swollen microcrystalling cellulose and coniferin or coniferin- [ α-^13C] in existence of β-glucosidase, glucose oxidase and peroxidase. The results of analysis of DHPCC by CP/MAS ^13C-NMR showed that β-0-4, β-β,β-5 and β-1 structures were the main substructures of DHPCC. DHP could connect with cellulose through benzyl ether linkage, ester bond and ketal bond which mainly occurred at α-position. Benzyl ether linkage between lignin and cellulose perhaps was the main structure.
出处
《中国造纸学报》
EI
CAS
CSCD
2006年第1期1-4,共4页
Transactions of China Pulp and Paper
基金
国家自然科学基金(30471365)
教育部博士点基金(20020561022)
山东省中青年科学家奖励基金(04BS05005)的资助
关键词
纤维素
^13C标记
木素
cellulose
^13C-isotopic tracer
lignin
