水再分散型纳米纤维素晶须的制备及表征

doi:10.3969/j.issn.0253-2417.2014.03.002

林产化学与工业 ›› 2014, Vol. 34 ›› Issue (3): 7-12.doi: 10.3969/j.issn.0253-2417.2014.03.002

水再分散型纳米纤维素晶须的制备及表征

陶向文, 叶代勇

华南理工大学化学与化工学院, 广东广州 510640

收稿日期:2013-04-27 出版日期:2014-06-25 发布日期:2014-06-25
通讯作者: 叶代勇，硕士生导师，研究领域：精细化工；E-mail：cedyye@scut.edu.cn。 E-mail:cedyye@scut.edu.cn
作者简介:陶向文（1989- ），男，湖北英山人，硕士生，主要从事精细化工研究工作
基金资助:
国家自然科学基金资助项目（20646003）；广东省自然科学基金（07300767）；华南理工大学中央高校基本科研业务费专项资金项目（2009ZM0239）

Preparation and Characterization of Water-redispersed Nanocellulose Whiskers

TAO Xiang-wen, YE Dai-yong

School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China

Received:2013-04-27 Online:2014-06-25 Published:2014-06-25

摘要/Abstract

摘要： 通过硫酸水解脱脂棉制备了纳米纤维素晶须（NCW）悬浮液，在NCW悬浮液中加入一定量阴离子型高分子电解质羧甲基纤维素钠（CMC-Na）后，喷雾干燥悬浮液制备出了粉状NCW固体。将NCW固体重新分散于去离子水中得到再分散纳米纤维素晶须（re-NCW）悬浮液，探究了再分散过程中CMC-Na用量、超声波作用时间、NCW悬浮液的pH值、喷雾干燥入口温度对re-NCW再分散性能的影响，并用傅里叶红外光谱（FT-IR）、扫描电子显微镜（SEM）、透射电镜（TEM）、热失重分析（TGA）等方法对re-NCW进行了表征。结果表明，当CMC-Na添加量为6%、超声波作用时间为5 min，NCW悬浮液的pH值为7，喷雾干燥入口温度为160℃时，制备的re-NCW平均粒径约为170 nm，Zeta电位值约为65 mV，具有良好的可再分散性。

关键词: 纳米纤维素晶须, 羧甲基纤维素钠, 水再分散

Abstract: Aqueous suspensions of nanocellulose whiskers (NCW) were prepared by the sulfuric acid hydrolysis. The redispersed powders of NCW were obtained through adding a certain amount of sodium carboxymethyl cellulose (CMC-Na) to NCW suspensions and then processed by spray drying. The NCW powders were redispersed in the water and the redispersed NCW (re-NCW) were obtained. The influences of CMC-Na dosages, ultrasonic time, pH of the suspensions, and inlet temperature of the spray drying on the redispersibility of re-NCW were investigated. Then the re-NCW were characterized using several analytical techniques such as FT-IR, SEM, TEM and TGA etc. The results showed that the NCW water-redispersibility suspension were obtained with an average particle size of 170 nm and a Zeta potential of 65 mV, when the amount of CMC-Na was 6%, the ultrasonic time was 5 min, the pH value of the suspensions was 7, the inlet temperature for spray drying was 160℃, respectively.

Key words: nanocellulose whiskers, sodium carboxymethyl cellulose, water-redispered suspension

中图分类号:

TQ35

陶向文, 叶代勇. 水再分散型纳米纤维素晶须的制备及表征[J]. 林产化学与工业, 2014, 34(3): 7-12.

TAO Xiang-wen, YE Dai-yong. Preparation and Characterization of Water-redispersed Nanocellulose Whiskers[J]. Chemistry and Industry of Forest Products, 2014, 34(3): 7-12.

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水再分散型纳米纤维素晶须的制备及表征

Preparation and Characterization of Water-redispersed Nanocellulose Whiskers

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