纳米纤维素制备的工艺优化与表征

发布时间：2018-02-09 06:05

  本文关键词： 高产率 纳米纤维素 酸溶胀 超声波处理　出处：《应用化工》2017年05期 　论文类型：期刊论文

【摘要】：为了高产率的制备粒径均一的纳米纤维素。以棉浆粕为原料,采用硫酸溶胀结合超声波处理的方法制备纳米纤维素。采用单因素法系统研究了硫酸溶胀预处理条件和超声功率、超声时间等超声加工条件。优化的工艺为:硫酸质量分数64%,溶胀温度40℃,溶胀时间25 min,超声功率1 000 W,超声时间30 min。在优化工艺条件下,制得的纳米纤维素的产率可以达到54.04%。扫描电镜和透射电镜测试表明所制得的纳米纤维素为针状晶须形态,直径10~30 nm,长度100~300 nm。X-射线衍射分析表明所得纳米纤维素为纤维素Ⅰ型结晶结构,结晶度较棉浆粕略微降低。
[Abstract]:In order to prepare nano-cellulose with uniform particle size in high yield, the nano-cellulose was prepared by sulfuric acid swelling combined with ultrasonic treatment with cotton pulp as raw material. The pretreatment conditions and ultrasonic power of sulfuric acid swelling were systematically studied by single factor method. Ultrasonic processing conditions, such as ultrasonic time, were optimized as follows: mass fraction of sulfuric acid 64, swelling temperature 40 鈩，

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