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首页> 外文期刊>Journal of Molecular Liquids >Sustainable synthesis of natural deep eutectic solvents (NADES) by different methods
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Sustainable synthesis of natural deep eutectic solvents (NADES) by different methods

机译:不同方法可持续合成天然深层溶剂(NADE)

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Natural deep eutectic solvents (NADES) based on malic acid-citric acid-water (MA-CA), xylitol-citric acid-water (Xyl-CA) and xylitol-malic acid-water (Xyl-MA) were prepared according to three different methods: controlled heating and stirring, ultrasound-assisted synthesis (UAS), and microwave-assisted synthesis (MAS), in each case employing a 1:1:10 M ratio. The NADES were characterized by infrared spectroscopy (ATR-FTIR), which indicated the formation of intermolecular interactions such as hydrogen bonds between the precursors, irrespective of the synthesis method. Thermogravimetric analysis (TGA) was used to obtain the thermal decomposition profiles of the synthesized solvents, which evidenced interactions between the precursors and decomposition temperatures higher than 150 degrees C. Determination of the physical properties showed no significant differences of viscosity and density among the NADES produced using the different synthesis methods, at a 95% confidence level. Hence, all the methods used for the synthesis of NADES resulted in solvents with similar physicochemical characteristics. The syntheses assisted by ultrasound and microwaves were faster and efficient, while advantages of the stirring and heating method included the use of simpler equipment and the ability to produce larger volumes of solvents. (C) 2019 Elsevier B.V. All rights reserved.
机译:基于苹果酸 - 柠檬酸 - 水(MA-CA),木糖醇 - 柠檬酸 - 水(的Xyl-CA)和木糖醇苹果酸 - 水(的Xyl-MA)天然深共晶的溶剂(纳代)根据3制备不同的方法:控制加热和搅拌,超声辅助的合成(UAS)和微波辅助合成(MAS),在每种情况下采用1:1:10 M比。通过红外光谱法(ATR-FTIR),这表明分子间相互作用,例如前体之间的氢键的形成,而不管合成方法的纳代进行了表征。热重量分析(TGA)用于获得合成的溶剂,这证明的前体和分解温度的物理性质的高于150℃的测定之间的相互作用的热分解图谱表明粘度和密度的制造的纳代间无差异显著使用不同的合成方法,在95%的置信水平。因此,用于纳代的合成的所有方法产生了具有相似的物理化学特性的溶剂。通过超声和​​微波辅助的合成是更快和有效,而搅拌和加热方法的优点包括使用更简单的设备,并产生较大的溶剂的体积的能力。 (c)2019 Elsevier B.v.保留所有权利。

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