微纤化纤维素微观形态及物化特性的表征  

Physicochemical Properties Characterization of Microfibrillated Cellulose

作　　者：修慧娟[1] 杨国鑫[1] 强丹丹 李金宝[1] 

机构地区：[1]陕西科技大学轻工与能源学院,陕西西安710021

出　　处：《纸和造纸》2015年第7期16-20,共5页Paper and Paper Making

基　　金：齐鲁工业大学制浆造纸科学与技术教育部重点实验室项目(08031352);陕西省教育厅项目(14JK1105);陕西科技大学博士启动基金(BJ13-14)

摘　　要：微纤化纤维素（Microfibrillated Cellulose,MFC）是一种具有纳米尺度的新型纤维素纤维,应用前景极为广阔。研究工业化MFC产品的物化特性,对于应用MFC开发高性能复合材料具有积极的意义。本文研究大赛璐MFC产品的微观形貌、长度分布、比表面积、表面电化学性能、水悬浮液分散稳定性、化学结构、结晶结构等物化特性,并与常规纤维素纤维进行了对比。结果表明：MFC的微观形态为细丝状和带状共混的形态特点,柔顺性好,绝大部分细丝直径或带状物厚度为10~60 nm,重量平均长度44μm,形态和尺寸与普通纤维素纤维有很大区别。MFC比表面积巨大,是针叶木和阔叶木纤维的5~6倍;在水介质中分散稳定性极好,纤维表面呈负电性,电荷量是针叶木纤维的17.4倍,阔叶木纤维的13.6倍;MFC纤维化学结构和聚集态结构仍保持天然纤维素的特点,但结晶度较大。MicrofibriUated Cellulose, a kind of new cellulose fiber with one-dimensional nanostmcture, shows a good application future. It is significant to investigate physicochemical properties of commercial products of MFC for its widely application in the preparation of high performance composite materials. Microstructure, length distribution, specific surface area, surface charge characteristics, water suspension stability, chemical structure and crystalline structure of MFC from Daicel Corporation were investigated and compared with conventional cellulose fiber in this paper. Results show that MFC is of blend structure of flexible filamentsand ribbon, which is overwhelmingly 10-60nm in diameter or thickness and 44txm in weight average length, differ from conventional cellulose fiber. Specific surface area of MFC is 5~6 times as big as softwood or hardwood fiber. MFC has an excellent dispersion and stability in water suspension, and is negatively charged. Charge quantity is 17.4 times and 13.6 times as big as softwood and hardwood fibers respectivel）,. MFC is in agreeing with conventional cellulose fiber in chemical and crystalline structures, but has a bigger crystaUinity.

关 键 词：微纤化纤维素 针叶木纤维 阔叶木纤维 性能 

分 类 号：TS711[轻工技术与工程—制浆造纸工程]