Liang Kunhao, Yao Haiyun, Qiao Jing, Gao Shan, Zong Mingji, Liu Fengshou, Yang Qili, Liang Lanju, Fang Dawei
School of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang 277160, China.
Institute of Rare and Scattered Elements, College of Chemistry, Liaoning University, Shenyang 110036, China.
Molecules. 2024 Nov 5;29(22):5227. doi: 10.3390/molecules29225227.
Ionic liquids, which are widely recognized as environmentally friendly solvents, stand out as promising alternatives to traditional heat-transfer fluids due to their outstanding heat-storage and heat-transfer capabilities. In the course of our ongoing research, we successfully synthesized ionic liquids 1-ethyl-4-alkyl-1,2,4-triazolium alanine [Taz(2,)][Ala], where ( = 4, 5); in this study, we present comprehensive data on their density, surface tension, isobaric molar heat capacity, and thermal conductivity for the first time. The key thermophysical parameters influencing the heat-transfer process, such as thermal expansibility, compressibility, isochoric heat capacity, and heat-storage density, were meticulously calculated from experimental data. Upon comparison with previously reported ionic liquids and commercially utilized heat-transfer fluids, [Taz(2,)][Ala] demonstrated superior heat-storage and heat-transfer performance, particularly in terms of heat-storage density (2.63 MJ·m·K), thermal conductivity (0.190 W·m·K), and melting temperature (~226 K). Additionally, the presence of the alanine anion in [Taz(2,)][Ala] provides more possibilities for its functional application.
离子液体被广泛认为是环境友好型溶剂，因其出色的蓄热和传热能力，作为传统传热流体的有前途的替代品而脱颖而出。在我们正在进行的研究过程中，我们成功合成了离子液体1-乙基-4-烷基-1,2,4-三唑鎓丙氨酸盐[Taz(2,)][Ala]，其中( = 4, 5)；在本研究中，我们首次展示了关于它们的密度、表面张力、等压摩尔热容和热导率的全面数据。根据实验数据精心计算了影响传热过程的关键热物理参数，如热膨胀性、压缩性、等容热容和蓄热密度。与先前报道的离子液体和商业使用的传热流体相比，[Taz(2,)][Ala]表现出卓越的蓄热和传热性能，特别是在蓄热密度（约2.63 MJ·m·K）、热导率（约0.190 W·m·K）和熔点（约226 K）方面。此外，[Taz(2,)][Ala]中丙氨酸阴离子的存在为其功能应用提供了更多可能性。
