相关实验视频
Updated: Jul 4, 2025
06:15
Preparation of Binary and Ternary Deep Eutectic Systems
Published on: October 31, 2019
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胆化物/酸作为深度阳性溶剂及其与DMSO在298.15至353.15K的二元溶液的物理化学特性
Aafia Sheikh1,2, Athar Yaseen Khan2, Safeer Ahmed3
1Department of Chemistry, Government College Women University, Sialkot 51310, Pakistan.
ACS omega
|January 29, 2024
概括
这项研究探讨了深层性溶剂 (DES) 和它们与DMSO的混合物,揭示了它们的物理化学特性. 这些发现突出了这些绿色化学替代品中的特定相互作用的包装效应.
科学领域:
- 物理化学 物理化学
- 绿色化学 绿色化学
- 材料科学 材料科学 材料科学
背景情况:
- 深度环氧溶剂 (DES) 正在成为各种技术应用中传统有机溶剂的可持续替代品.
- 了解DES及其混合物的物理化学特性对于优化它们在绿色化学中的使用至关重要.
研究的目的:
- 研究胆/酸 (ChCl/AcA) DES及其与二甲基硫氧化物 (DMSO) 的二元混合物的物理化学特性 (密度,声速,粘度,电导率).
- 分析成分和温度 (298.15353.15 K) 对这些特性的影响,了解分子间相互作用.
主要方法:
- 实验测量了密度 (ρ),声速 (u),动态粘度 (η) 和电导率 (κ).
- 分析过多的摩尔体积,异热压缩性偏差和过多的部分摩尔体积,以阐明相互作用.
- 将取决于温度的粘度和导电性数据与Vogel-Fulcher-Tammann (VFT) 方程相匹配.
主要成果:
- 密度数据被准确地描述为温度的二度多项式.
- 混合物表现出负的过量摩尔体积和异热压缩性偏差,在DES (x1) ≈0.15的摩尔分数处的最小值,随着温度的增加而加深.
- 过多的等离子粘度在x1 ≈ 0.62时显示为最小值,支持体积学发现,粘度和导电性的温度依赖遵循VFT方程.
结论:
- 在x1 ≈ 0.15处过剩的局部摩尔体积曲线的交叉表明,包装效应在ChCl/AcA DES-DMSO混合物中的特定相互作用中占主导地位.
- 观察到的体积和粘度特性趋势为这些DES/DMSO混合物的行为提供了全面的了解.
- VFT方程有效地模拟了粘度和导电性的温度依赖性,这对于预测跨温度的溶剂行为至关重要.
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