High energy oxidation and organosolv solubilization for high yield isolation of cellulose nanocrystals (CNC) from Eucalyptus hardwood.
High energy oxidation and organosolv solubilization for high yield isolation of cellulose nanocrystals (CNC) from Eucalyptus hardwood.
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高能氧化和有机溶剂溶解可从桉树硬木中高产分离纤维素纳米晶体 (CNC)
DOI：
10.1038/s41598-018-34667-2
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发表时间：
2018-11-07
影响因子：
4.6
通讯作者：
Liu Y
中科院分区：
文献类型：
--
作者：
Zhang R;Liu Y
纤维素纳米晶（CNC）由于其独特的性质，在响应材料、手性模板和坚韧纳米复合材料等方面得到了广泛的应用。酸水解和酶水解广泛用于制备CNC。这些传统方法表现出腐蚀危害、耗时工艺和/或低产率的固有局限性。在本文中，进行辐射氧化和有机溶剂增溶以引起纤维素的快速降解，同时结晶以实现约100%的纤维素。CNC的产率为87%。通过紫外-可见光谱、Zetal电位、XRD、TEM、DLS、GPC、FT-IR和TGA等技术对产物的形貌、光谱和稳定性进行了表征。所得CNC悬浮液在4 °C下储存9个月后呈现具有高稳定性的独特性质。此外，通过在不搅拌的情况下向CNC水性分散体中添加阴离子或阳离子溶液成功地产生CNC液晶相。这项工作中的创新方法开辟了一条途径，直接从木质纤维素生物质通过辐射氧化和有机溶剂增溶，而无需酸水解和洗涤程序获得CNC。
Cellulose nanocrystals (CNC) have been widely used as responsive materials, chiral templates, and tough nano-composites due to its unparalleled properties. Acid and enzyme hydrolyses are extensively employed to prepare CNC. These traditional approaches exhibit inherent limitations of corrosion hazards, time-consuming process, and/or low yield. Herein, irradiation oxidation and organosolv solubilization are conducted to cause rapid degradation with simultaneous crystallization of cellulose to achieve approx. 87% yield of CNC. The morphology, spectroscopic, and stability properties of the as-prepared CNC are characterized through UV-vis spectroscopy, zetal potential, XRD, TEM, DLS, GPC, FT-IR and TGA techniques. The resultant CNC suspension presents unique property with high stability after 9 months storage at 4 °C. Moreover, CNC liquid crystal phase is successfully generated by addition of anions or cations solution to the CNC aqueous dispersion without stirring. The innovative approach in this work opens an avenue to obtain CNC directly from lignocellulosic biomass through irradiation oxidation and organosolv solubilization without acid hydrolysis and washing procedure.
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影响因子：
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通讯作者：
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