Binqi Wang , Hongshuai Gao , Yuxing Wu , Huizheng Wu , Tiancheng Li , Xue Liu , Yi Nie
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引用次数: 0
Abstract
The utilization of ionic liquids (ILs) as solvents in the preparation of regenerated cellulose fibers (RCFs) has garnered considerable research attention. The physicochemical properties of the ILs mixtures with coagulants significantly impact the morphology and characteristics of RCFs. This study determines the density and viscosity of 1-ethyl-3- methylimidazolium diethylphosphate ([Emim][DEP]), 1-ethyl-3-methylimidazolium dimethylphosphate ([Emim][DMP]), and 1‑butyl‑3-methylimidazolium dimethylphosphate ([Bmim][DMP]) in mixtures with water and ethanol. The thermodynamic data such as excess molar volumes, viscosity deviation, and excess Gibbs energy of activation for viscous flow, were also calculated and analyzed. The density and viscosity of [Bmim][DMP] is 1.1579 g·cm−3 and 367.97 mPa·s at 303 K, and the order of the interaction between different ILs and coagulants was obtained. In the meantime, the water activity of the ILs-water mixtures was also tested, and the constant pressure boiling point of ILs with water and ethanol mixtures was measured. Furthermore, the polar action parameters of ILs were determined by Reichardt's dye. The experimental results obtained have mutually confirmed each other. The investigation of the interaction between ILs and coagulants furnishes foundational data and theoretical support for the controlled formation of RCFs prepared using ILs as solvents.
利用离子液体（ILs）作为溶剂制备再生纤维素纤维（RCFs）的研究备受关注。离子液体与凝固剂混合物的理化性质对再生纤维素纤维的形态和特性有重大影响。本研究测定了 1-乙基-3-甲基咪唑二乙基磷酸盐（[Emim][DEP]）、1-乙基-3-甲基咪唑二甲基磷酸盐（[Emim][DMP]）和 1-丁基-3-甲基咪唑二甲基磷酸盐（[Bmim][DMP]）与水和乙醇的混合物的密度和粘度。此外，还计算和分析了过量摩尔体积、粘度偏差和粘流活化过量吉布斯能等热力学数据。在 303 K 时，[Bmim][DMP] 的密度和粘度分别为 1.1579 g-cm-3 和 367.97 mPa-s，并得出了不同 IL 与凝固剂之间相互作用的顺序。同时，还测试了 ILs 与水混合物的水活性，并测量了 ILs 与水和乙醇混合物的恒压沸点。此外，还利用赖哈特染料测定了 ILs 的极性作用参数。实验结果相互印证。ILs 与混凝剂之间相互作用的研究为以 ILs 为溶剂制备 RCFs 的可控形成提供了基础数据和理论支持。
期刊介绍：
Fluid Phase Equilibria publishes high-quality papers dealing with experimental, theoretical, and applied research related to equilibrium and transport properties of fluids, solids, and interfaces. Subjects of interest include physical/phase and chemical equilibria; equilibrium and nonequilibrium thermophysical properties; fundamental thermodynamic relations; and stability. The systems central to the journal include pure substances and mixtures of organic and inorganic materials, including polymers, biochemicals, and surfactants with sufficient characterization of composition and purity for the results to be reproduced. Alloys are of interest only when thermodynamic studies are included, purely material studies will not be considered. In all cases, authors are expected to provide physical or chemical interpretations of the results.
Experimental research can include measurements under all conditions of temperature, pressure, and composition, including critical and supercritical. Measurements are to be associated with systems and conditions of fundamental or applied interest, and may not be only a collection of routine data, such as physical property or solubility measurements at limited pressures and temperatures close to ambient, or surfactant studies focussed strictly on micellisation or micelle structure. Papers reporting common data must be accompanied by new physical insights and/or contemporary or new theory or techniques.
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