蔗渣/LiCl/DMAc溶液体系及其纤维素接枝聚丙烯酰胺的制备  

Preparation of bagasse/LiCl/DMAc solution and its graft copolymer with polyacrylamide

作　　者：李状[1,2] 石锦志[1,2] 廖兵[1] 付铁柱[1] 陈永[1] 庞浩[1] 

机构地区：[1]中国科学院广州化学研究所,中国科学院纤维素化学重点实验室,广东广州510650 [2]中国科学院研究生院,北京100049

出　　处：《化工进展》2010年第10期1975-1978,1989,共5页Chemical Industry and Engineering Progress

基　　金：NSFC-广东联合基金(U0834005);国家863计划(2007AA10074);广东省自然基金团队项目(E06200692)资助

摘　　要：为了发展利用植物生物质资源,采用将蔗渣溶于LiCl/DMAc体系并利用溶解于其中的物质与丙烯酰胺进行均相接枝反应以制备蔗渣接枝聚丙烯酰胺。结果表明蔗渣在160℃活化1h,烘干后与100g/L的LiCl/DMAc体系以固液比1∶50混合,然后在160℃加热4h的条件下可以取得81.3%的溶解率。溶液中不但含有纤维素,而且含有半纤维素和木质素。该溶液在30℃、N2环境且丙烯酰胺分两次投料的条件下进行共聚的接枝率达到62.86%。进一步的实验表明蔗渣接枝物的主要成分是纤维素-g-聚丙烯酰胺。这为植物生物质的高值化利用提供了新的途径。In order to develop the application of plant biomass,bagasse was attempted to dissolve in LiCl/DMAc system,and then the solute was used to prepare graft copolymer with polyacrylamide. The bagasse was activated at 160℃ for 1h,then dried and added to a 100 g/L LiCl/DMAc system with 1： 50 solid to liquid ratio. The mixture was heated at 160℃ for 3h,the solubility of bagasse could be achieved to 81.3%. The solution contains not only cellulose,but also hemicellulose and lignin,which was then used to copolymerize with acrylamide under N2 atmosphere at 30℃,the grafting rate was achieved to 62.86%. The graft copolymer was found mainly composed of cellulose-graft-polyacrylamide,which provides a new method for the utilization of plant biomass.

关 键 词：蔗渣 LiCl/DMAc体系 接枝共聚 丙烯酰胺 碱化处理 

分 类 号：TQ352[化学工程]