Abstract Present study reports density (ρ), ultrasonic velocity (u), and viscosity (η) for some choline amino acid ionic liquids, [Ch][AA]-ILs, including choline glycine, choline L-valine and choline L-proline in aqueous solutions of two water soluble polymers, i.e. polypropylene glycol 400 (PPG400) and polyethylene glycol 400 (PEG400) with different mass fractions of polymer, w/w = (0.025, 0.050 and 0.075), at 298.15 K under atmospheric pressure (≈85 kPa). The experimental densities and sound speeds were used for calculation the apparent molar volume ( V φ ), limiting apparent molar volume ( V φ 0 ), apparent molar isentropic compressibility ( κ φ ), limiting apparent molar isentropic compressibility ( κ φ 0 ), and also the transfer molar volume ( Δ tran V φ 0 ) and isentropic compressibility ( Δ tran κ φ 0 ) of [Ch][AA] from water to aqueous polymer solutions. Moreover, the viscosity B-coefficient, hydration number (nH), transfer viscosity B-coefficient ( Δ tran B ), free energies of activation per mole of solvent ( Δ μ 1 0 ≠ ) and solute ( Δ μ 2 0 ≠ ) have been computed by the help of experimental viscosities measured for the studied solutions. These quantities are useful for evaluation the ILs solvation behaviour, their structure-making or breaking abilities in the presence of polymer in water medium and also the solute-solute or solute-solvent interactions exists in aqueous ([Ch][AA] + polymer) solutions. The results indicated that the IL-water interactions are more favourable in the presence of PPG400 and follow the order: [Ch][Gly] > [Ch][L-Pro] > [Ch][L-Val]. Inversely, the IL-water interactions become weaker by ILs transferring from water to aqueous PEG400 solutions.

中文翻译：

---

一些胆碱氨基酸离子液体在聚丙二醇 400 和聚乙二醇 400 水溶液中的体积、声学和粘度研究

摘要 本研究报告了一些胆碱氨基酸离子液体 [Ch][AA]-ILs，包括胆碱甘氨酸、胆碱 L-缬氨酸和胆碱 L-脯氨酸的密度 (ρ)、超声速度 (u) 和粘度 (η)在两种水溶性聚合物的水溶液中，即聚乙二醇 400 (PPG400) 和聚乙二醇 400 (PEG400) 具有不同质量分数的聚合物，w/w = (0.025、0.050 和 0.075)，在 298.15 K 大气压下 (≈ 85 kPa)。实验密度和声速用于计算表观摩尔体积（ V φ ）、极限表观摩尔体积（ V φ 0 ）、表观摩尔等熵压缩率（κ φ ）、极限表观摩尔等熵压缩率（ κ φ 0 ），以及 [Ch][AA] 从水到聚合物水溶液的转移摩尔体积 (Δ tran V φ 0 ) 和等熵压缩率 (Δ tran κ φ 0 )。此外，黏度 B 系数、水合数 (nH)、转移黏度 B 系数 (Δ tran B )、每摩尔溶剂的活化自由能 ( Δ μ 1 0 ≠ ) 和溶质 ( Δ μ 2 0 ≠ ) 具有借助为研究溶液测量的实验粘度计算得出。这些量可用于评估 ILs 溶剂化行为、它们在水介质中存在聚合物时的结构形成或破坏能力以及水溶液中存在的溶质 - 溶质或溶质 - 溶剂相互作用（[Ch] [AA] + 聚合物）解决方案。结果表明，在 PPG400 存在下，IL-水相互作用更有利，并遵循以下顺序：[Ch][Gly] > [Ch][L-Pro] > [Ch][L-Val]。相反，IL-水相互作用因ILs从水转移到PEG400水溶液而变弱。