Tailoring the yield and characteristics of wood cellulose nanocrystals (CNC) using concentrated acid hydrolysis
Tailoring the yield and characteristics of wood cellulose nanocrystals (CNC) using concentrated acid hydrolysis
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DOI：
10.1007/s10570-015-0615-1
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发表时间：
2015-06-01
期刊：
影响因子：
5.7
通讯作者：
Zhu, J. Y.
中科院分区：
文献类型：
--
作者：
Chen, Liheng;Wang, Qianqian;Zhu, J. Y.
纤维素纳米晶体（CNC）因其独特的力学和光学性能，近年来受到全球科学界的广泛关注。在这里，我们进行了第一次详细的探索CNC的基本属性，如形态，结晶度，硫酸化程度和产量，作为生产条件变量的函数。在约60重量%的浓酸浓度下的快速纤维素解聚和硫酸化反应导致CNC生产的操作窗口非常窄。我们发现，在严格的反应条件范围内，可以从葡聚糖含量为78重量%的漂白桉树工艺纸浆中获得高达70重量%的CNC产率，并且可以产生超过200 nm的加权平均长度和3至10 mg/g的硫含量（CNC表面电荷的量度）。这项研究为CNC的生产提供了关键知识，这些CNC具有针对不同特定应用的特性，对商业化具有重要意义。
Cellulose nanocrystals (CNC) have recently received much attention in the global scientific community for their unique mechanical and optical properties. Here, we conducted the first detailed exploration of the basic properties of CNC, such as morphology, crystallinity, degree of sulfation and yield, as a function of production condition variables. The rapid cellulose depolymerization and sulfation reactions under concentrated acid concentrations of around 60 wt% resulted in a very narrow operating window for CNC production. We found that CNC yields as high as 70 wt% from a bleached eucalyptus 'craft pulp with glucan content of 78 wt% can be achieved under a tight range of reaction conditions and that a weighted average length of over 200 nm and sulfur content (a measure of CNC surface charge) between 3 and 10 mg/g can be produced. This study provided critical knowledge for the production of CNC with characteristics tailored for different specific applications, significant to commercialization.