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首页> 外文期刊>Fibres & textiles in Eastern Europe >Study of lonic Liquids UV-VIS and FTIR Spectra before and after Heating and Spruce Groundwood Dissolution
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Study of lonic Liquids UV-VIS and FTIR Spectra before and after Heating and Spruce Groundwood Dissolution

机译：加热和云杉研磨木材溶解前后的离子液体UV-VIS和FTIR光谱研究

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The absorption of 1-butyl-3-methylimidazolium chloride and acetate taken from commercial packaging was studied by means of UV-VIS and infrared spectroscopy with some differences observed. Further research showed that heating both 1-butyl-3-methylimidazolium chloride and acetate alone, as well as in the presence of wood pulp, causes the darkening of these ionic liquids. Changes in the colour of ionic liquids associated with a variation in the absorption characteristics of pure ionic liquids and wood solutions in these liquids in UV and visible light are expressed primarily in the widening of the absorption bands. The presence of coloured products formed during their heating, as well as dissolution of the chemical components of wood in ionic liquids, had relatively little effect on the position of individual absorption bands in the spectrum obtained by the FT-IR method. The small differences in the absorption of spruce groundwood solutions in ionic liquids in IR as compared to pure ionic liquids suggest that strong chromophore groups in ionic liquids are created without serious reconstruction of their structure.
机译：通过UV-VIS和红外光谱研究了从商业包装中吸收的1-丁基-3-甲基咪唑鎓氯化物和乙酸盐的吸收，并观察到一些差异。进一步的研究表明，单独加热1-丁基-3-甲基咪唑鎓氯化物和乙酸盐以及在木浆存在下加热都会使这些离子液体变黑。离子液体的颜色变化与纯离子液体和木材溶液在紫外线和可见光下在这些液体中的吸收特性变化有关，主要表现为吸收带的变宽。在加热过程中形成的有色产物的存在以及木材中化学成分在离子液体中的溶解，对通过FT-IR方法获得的光谱中各个吸收带的位置影响相对较小。与纯离子液体相比，IR中离子液体中云杉基木材溶液的吸收差异很小，这表明在离子液体中会形成强生色团，而不会对其结构进行严重重建。

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