JOURNAL OF MOLECULAR LIQUIDS
·
2017
·
IF 3.648
Jialin Xie,Fang Wang,Dong Fu
The surface tensions (γ) of 2-diethylaminoethanol (DEAE)–tetramethylammonium glycinate ([N 1111 ][Gly]), DEAE–1-butyl-3-methylimidazolium glycinate ([Bmim][Gly]) and DEAE–1-butyl-3-methylimidazolium l -lysinate ([Bmim][Lys]) aqueous solutions were measured by using the BZY-1 surface tension meter. The temperature ranged from 303.2 K to 323.2 K. The mass fractions of DEAE and amino acid ionic liquids (AAILs) respectively ranged from 0.30 to 0.50 and 0.025 to 0.075. A thermodynamic equation was proposed to model the surface tension and the calculated results agreed well with the experiments. The effects of temperature and mass fractions of DEAE and AAILs on the surface tension were demonstrated on the basis of experiments and calculations. The surface enthalpy and surface entropy were determined and their concentration dependences were illustrated.
研究领域:
物理化学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Lemeng Wang,Xiangfeng Tian,Chi Fang,Hao Huang,Dong Fu,Yuheng Quan
In this work, the surface tensions (γ) of the aqueous blends of 1-dimethylamino-2-propanol (DMA2P) + amino acid ionic liquids (AAILs) were studied using the Wilhelmy plate method at temperatures from 303.2 to 323.2 K and atmospheric pressure. The AAILs include tetramethylammoniumglycinate ([N1111][Gly]), 1-butyl-3-methylimidazolium glycinate ([Bmim][Gly]), and 1-butyl-3-methylimidazolium-l-lysinate ([Bmim][Lys]). The concentrations of DMA2P and AAILs were varied between 0.300 and 0.500 wt % and 0.025 and 0.075 wt %, respectively. A thermodynamic correlation approach with respect to the mass fraction and temperature was employed to correlate the surface tension of DMA2P–AAILs aqueous solutions. The surface entropy (SS) and surface enthalpy (HS) were calculated from the analytical formulation, and their variation with mass fraction and temperature was demonstrated. The effects of the types of AAILs on the surface properties were also analyzed and compared.
研究领域:
物理化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2016
·
IF 2.196
Dong Fu,LeMeng Wang,XiangFeng Tian
The surface tension (γ) of 1-dimethylamino-2-propanol (DMA2P), DMA2P-monoethanolamine (MEA), and DMA2P-piperazine (PZ) aqueous solutions was measured by using the BZY-1 surface tension meter. The temperature ranged from 303.2 K to 323.2 K. The mass fractions of DMA2P, MEA and PZ respectively ranged from 0.30 to 0.50, 0.05 to 0.15 and 0.025 to 0.075. An equation was proposed to model the surface tension and the calculated results agreed well with the experiments. The surface thermodynamics including surface enthalpy and surface entropy were determined and their concentration dependence was analysed.
研究领域:
物理化学
·
热力学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
Entropy
·
2015
·Vol. 17
·期 8
·5437-5449
·
IF 1.502
Xingxing Li,Huanfeng Tang,Xianrui Lu,Shi Lin,Lili Shi,Zaiyin Huang
Cuprous oxide (Cu2O) nanocubes were synthesized by reducing Cu(OH)2in the presence of sodium citrate at room temperature. The samples were characterized in detail by field-emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray powder diffraction, and N2absorption (BET specific surface area). The equations for acquiring reaction kinetic parameters and surface thermodynamic properties of Cu2O nanocubes were deduced by establishment of the relations between thermodynamic functions of Cu2O nanocubes and these of the bulk Cu2O. Combined with thermochemical cycle, transition state theory, basic theory of chemical thermodynamics, andin situmicrocalorimetry, reaction kinetic parameters, specific surface enthalpy, specific surface Gibbs free energy, and specific surface entropy of Cu2O nanocubes were successfully determined. We also introduced a universal route for gaining reaction kinetic parameters and surface thermodynamic properties of nanomaterials.Keywords:nanothermodynamics;cuprous oxide;nanocrystal;specific surface enthalpy;specific surface Gibbs free energy;specific surface entropy
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2023
·Vol. 148
·期 14
·7125-7145
·
IF 4.4
Wei Jie,Sun Ximan,Zhang Yuxin,Gao Peizhen,Ren Caixia,Fang Dawei,Li Li
Deep eutectic solvents (DESs) as the novel kind of green solvents have been received widespread attention. After the addition of molecular solvents, a pseudo-binary system is set up with the advantages such as low cost. A kind of DES (1TEAB: 3EG) was prepared and confirmed, and it is mixed with acetonitrile, ethanol and water. Their density, surface tension and refractive index of the DES and its corresponding pseudo-binary mixtures are explored in depth. In addition to the excess molar volumes, the partial molar volumes, partial molar volume at infinite dilution and their excess molar volumes are also investigated. The molar Gibbs free energy and the corresponding molar surface enthalpy could be deduced from the improved Eӧtvӧs equation. It is suggested that the molar Gibbs free energy model is fit for that of DES and its pseudo-binary systems. In addition, the surface tension deviations and refractive index deviations are figured out. This illustrates that there are fairly strong interactions between DES (1TEAB: 3EG) and molecular solvents, which could attribute to mainly two sides: H-bonding and structural effect. Besides, refractive properties such as the molar refraction and free volume are advised that there are ion–dipole interactions between DES and molecular solvents. Graphical abstract
研究领域:
化学
·
物理化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）