微波协同离子液体EmimOAc处理毛竹的研究  

Study on Microwave-assisted Ionic Liquid Treatment on Bamboo

作　　者：周梦阳 彭红[1,2] 阮榕生[1,2] 刘玉环[1,2] 张锦胜[1,2] 郑洪立[1] 

机构地区：[1]南昌大学生物质转化教育部工程研究中心,江西南昌330047 [2]南昌大学食品科学与技术国家重点实验室,江西南昌330047

出　　处：《中国造纸学报》2014年第4期13-18,共6页Transactions of China Pulp and Paper

基　　金：国家自然科学基金项目(21306076);江西省教育厅科学技术研究项目(GJJ13089);中国博士后科学基金第54批面上资助项目(2013M540537);江西省博士后科研择优资助项目(2013KY41)

摘　　要：在微波作用下用离子液体1-乙基-3-甲基咪唑乙酸盐(Emim OAc)溶解经球磨并脱脂脱蜡后的毛竹竹粉,通过激光扫描共聚焦显微镜观察了竹粉在离子液体中的溶解过程。微波辐射60 min后可以实现竹粉在离子液体中的完全溶解。在离子液体/竹粉溶液中加入反溶剂可得到结构均匀的富含纤维素物质,最大得率为62.7%。Klason木素含量与FT-IR、XRD和SEM的分析结果表明,Emim OAc能够有效去除竹粉中的木素,最高去除率为57.1%;经离子液体处理后竹粉中的糖类物质含量增加;纤维素结晶度明显降低,晶型从Ⅰ型转变为Ⅱ型。Ball milled and dewaxed bamboo （Phyllostachy pubescens Mazel） powder was dissolved in 1-ethyl-3-methylimidazolium acetate （EmimOAc） assisted by microwave irradiation,the dissolution process was observed using laser confocal scanning microscopy.When irradiating by microwave for 60 min,bamboo powder was completely dissolved in ionic liquid.The cellulose-rich material with homogenous structure could be obtained by adding anti-solvent into biomass-ionic liquid solution,the maximum yield was 62.7％.Analysis results of acid insoluble lignin content,FT-IR,XRD and SEM showed that ionic liquid could remove lignin effectively,the highest removal rate was 57.1％,after ionic liquid pretreatment,the carbohydrate content of bamboo powder increased ; the cellulose crystallinity became lower and cellulose Ⅰ converted to be cellulose Ⅱ.

关 键 词：离子液体 毛竹 微波 溶解 

分 类 号：TS721.2[轻工技术与工程—制浆造纸工程]