杜仲细枝木纳米纤维素的制备及表征
Preparation and characterization of nanocellulose from Eucommia ulmoides twigs
赵伟 1耿兰 1赵芳 1侯明丽 1苏天翼 1郭婉婷 1张强1
作者信息
- 1. 西北农林科技大学林学院,陕西杨凌 712100
- 折叠
摘要
以一年生杜仲木材纤维素为原料,利用氯化胆碱/乳酸/对甲苯磺酸(摩尔比2∶12∶1)三元低共熔溶剂结合微射流机械处理,制备杜仲纳米纤维素(CNC).通过傅里叶红外光谱(FTIR)、X射线衍射(XRD)、扫描电子显微镜(SEM)和热重(TGA)等技术对CNC的理化性质进行了分析和表征.研究结果表明,杜仲CNC呈短棒状,长度为(163.95±6.72)nm,直径为(7.63±0.61)nm,长径比为20.18,得率达到73.84％,在悬浮液中的Zeta电位为(-20.50±0.72)mV.CNC为纤维素Ⅱ晶型,结晶度为62.18％.CNC表现出良好的热稳定性,Tmax=359℃.杜仲CNC的成功制备拓宽了杜仲细枝木的应用领域,可提高杜仲叶林种植模式的经济效益.
Abstract
Using the annual Eucommia wood cellulose as raw material.The ternary eutectic of choline chloride/lactic acid/p-toluenesulfonic acid monohydrate(molar ratio 2∶12∶1)was used as a solvent,com-bined with micro-fluidization mechanical treatment,to prepare Eucommia nanocellulose(CNC).The phys-ical and chemical properties of CNC were analyzed and characterized using various techniques including Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM),and thermogravimetry(TGA).The research findings reveal that CNC appears in the form of short rods,with an average length of(163.95±6.72)nm and a diameter of(7.63±0.61)nm.The aspect ratio is 20.18,and the yield is 73.84％.The Zeta potential in suspension is(-20.50±0.72)mV.The CNC crystal form exhibits of cellulose Ⅱ,with a crystallinity of 62.18％.Furthermore,CNC demonstrates favorable thermal stability,with Tmax=359 ℃.The successful preparation of CNC expands the potential application areas of Eucommia twig wood and enhances the economic benefits of the Eucommia leaf forest planting model.
关键词
杜仲/低共熔溶剂/微射流/纳米纤维素/叶林模式Key words
Eucommia ulmoides/deep eutectic solvent/micro-fluidization/nanocellulose/leaf forest model引用本文复制引用
基金项目
国家重点研发项目(2018YFE0127000)
出版年
2024
NETL
NSTL
万方数据