皇竹草预处理制备新型再生纤维素膜  

Preparation of Novel Cellulose Membrane from Hybrid Giant Napier

作　　者：翟蔚[1] 陈洪章[2] 马润宇[1] 

机构地区：[1]北京化工大学生命科学与技术学院,北京100029 [2]中国科学院过程工程研究所生化工程国家重点实验室,北京100080

出　　处：《纤维素科学与技术》2007年第2期1-7,共7页Journal of Cellulose Science and Technology

基　　金：国家重点基础研究发展计划项目(2004CB71700);中国科学院知识创新工程重点方向性项目(No.KJCX2-SW-206)

摘　　要：以农林废弃物皇竹草茎为原料,采用蒸汽爆破和乙醇自催化制浆的方式分离出纤维素,将其溶解在离子液体1-丁基-3-甲基咪唑氯代盐([bmim]Cl)中形成纤维素溶液并在水中再生得到纤维素膜。实验表明,汽爆采用1.55 MPa,维压5.45 min;乙醇制浆采用60%(V/V)乙醇溶液,160℃,维持2 h,可制备出α-纤维素含量达到92.65%,聚合度620,灰分低于0.3%的皇竹草纤维素。离子液体溶解并在水中再生的纤维素膜是一种无大孔结构的致密膜,其拉伸强度和断裂伸长率分别达到了165 MPa和5.90%,具有良好的液体渗透性能。Hybrid Giant Napier cellulose was prepared with ethanol pulping after steam explosion pretreatment. Ionic liquid [bmim]Cl and water were selected as solvent and coagulator to make regenerated Hybrid Giant Napier cellulose membrane. The optimum technological conditions of pulping of Hybrid Giant Napier and preparation of regenerated membrane were studied. The dialysis properties of cellulose membrane, such as water permeability and retention ratio of bovine serum albumin were also researched. Results indicated that Hybrid Giant Napier, especially its caudex, is a good material for making regenerated cellulose membrane.

关 键 词：皇竹草 蒸汽爆破 乙醇制浆 离子液体 再生纤维素膜 

分 类 号：TQ35[化学工程]