木质纤维素纳米纤丝制备及形态特征分析

被引:44
作者
陈文帅
于海鹏
刘一星
蒋乃翔
陈鹏
机构
[1] 东北林业大学生物质材料科学与技术教育部重点实验室
关键词
木质纤维素; 纳米纤丝; 形态特征; 超声处理;
D O I
暂无
中图分类号
TB383.1 [];
学科分类号
070205 ; 080501 ; 1406 ;
摘要
以阔叶树材杨木木粉为原料,始终保持纤维处在水润涨的状态下,利用亚氯酸钠在酸性条件下脱除木质素,氢氧化钾脱除半纤维素,然后借助高强度超声波的空化作用,依次制备了综纤维素、纯化纤维素及木质纤维素纳米纤丝(WCNF).通过傅里叶变换红外吸收光谱(FTIR)、X射线衍射(XRD)、扫描电镜(SEM)对WCNF制备过程中的化学组分、晶型结构、结晶度及形态特征变化进行了表征,并进一步利用图像分析系统对WCNF的直径分布进行了测量统计.结果表明,WCNF的主要成分为纤维素,其晶型结构仍为纤维素Ⅰ型,结晶度为65.68%,较之原料木粉提高了12.33%.所得纤丝的直径集中分布在5~32nm之间,长度大于10μm,长径比高于300,纤丝间相互交织成网状缠结结构.WCNF的高结晶度、高长径比、纳米尺度、网状缠结结构,显示其为一种十分理想的增强增韧材料.
引用
收藏
页码:1320 / 1326
页数:7
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