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OALib Journal期刊
ISSN: 2333-9721
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木质纤维素纳米纤丝制备及形态特征分析
DOI: 10.3724/SP.J.1105.2010.09438, PP. 1320-1326
Keywords: 木质纤维素,纳米纤丝,形态特征,超声处理
Abstract:
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6568%，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.
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