离子液体水解及离子液体与酶两步水解制备纳米纤维素

M. Babicka, M. Woźniak, K. Szentner, S. Borysiak, K. Dwiecki, I. Ratajczak
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引用次数: 1

摘要

本研究的目的是比较离子液体(1-烯丙基-3-甲基咪唑氯和1-乙基-3-甲基咪唑醋酸酯)水解和离子液体与里氏木霉纤维素水解酶联合水解两种不同方法获得的纳米纤维素的参数。用2种离子液体:1-烯丙基-3-甲基咪唑氯(AmimCl)和1-乙基-3-甲基咪唑乙酸(EmimOAc)处理Avicel纤维素。在两步水解中,纤维素经离子液体处理后,再用酶溶液水解。为了表征所获得的材料,使用了以下分析:红外光谱,x射线衍射和动态光散射。结果表明,两步法制备的纳米纤维素(先用离子液体水解,再用酶水解)与一步法制备的纳米纤维素具有相似的参数(粒度、XRD图谱和结晶度)。
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Preparation of nanocellulose by hydrolysis with ionic liquids and two-step hydrolysis with ionic liquids and enzymes
The aim of this study was to compare parameters of nanocellulose obtained by two different procedures: hydrolysis with ionic liquids (1-allyl-3-methylimidazolium chloride and 1-ethyl-3-methylimidazolium acetate) and hydrolysis with ionic liquids in combination with hydrolysis using a cellulolytic enzyme from Trichoderma reesei. Avicel cellulose was treated with two ionic liquids: 1-allyl-3-methylimidazolium chloride (AmimCl) and 1-ethyl 3-methylimidazolium acetate (EmimOAc). In the two-step hydrolysis cellulose after treatment with ionic liquids was additionally hydrolyzed with a solution of enzymes. In order to characterize the obtained material, the following analyses were used: infrared spectroscopy, X-ray diffraction and dynamic light scattering. The results indicated that cellulose obtained by two-step nanocellulose production methods (first hydrolysis with ionic liquids and then with enzymes) showed similar parameters (particle size, XRD patterns and degree of crystallinity) as the material after the one-step process, i.e. hydrolysis with ionic liquids.
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