Thermal conductivities of nine different bis((trifluoromethyl)sulfonyl)imide-based ionic liquids (ILs), [C₂mim][NTf₂], [C₄mmim][NTf₂], [C₈mim][NTf₂], [P_1,4,4,4][NTf₂], [N_1,1,1,4][NTf₂], [N_1,8,8,8][NTf₂], [C⁴₃mpy][NTf₂], [C⁴₄mpy][NTf₂], and [C₄mpy][NTf₂], have been measured using the modified transient plane source method (MTPS) over the temperature range from 298 to 348 K at atmospheric pressure. The thermal conductivities of all the studied ILs are in the range of 0.120–0.150 W·m^–1·K^–1, with a combined expanded uncertainty of 0.01 W·m^–1·K^–1 at a 95% confidence level. In all cases, thermal conductivity decreases with increasing temperature and follows a linear trend, as is typical for most liquids and falls within the reported range for ILs. Two existing group contribution models (GCMs) with differing modeling philosophies have also been extended and tested against a database consisting of this new data combined with all existing IL thermal conductivity data in the literature. The extended GCMs yielded average absolute relative deviations of 5.5% and 4.9%, respectively, for the entire dataset.

中文翻译：

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NTf2 基离子液体的热导率：通过基团贡献方法进行的实验测量和预测

九种不同的基于双（（三氟甲基）磺酰基）亚胺的离子液体 (ILs)、[C ₂ mim][NTf ₂ ]、[C ₄ mmim][NTf ₂ ]、[C ₈ mim][NTf ₂ ]的热导率, [P _1,4,4,4 ][NTf ₂ ], [N _1,1,1,4 ][NTf ₂ ], [N _1,8,8,8 ][NTf ₂ ], [C ⁴ ₃ mpy][NTf ₂ ]、[C ⁴ ₄ mpy][NTf ₂ ] 和 [C ₄ mpy][NTf ₂]，已使用改进的瞬态平面源方法 (MTPS) 在大气压下 298 至 348 K 的温度范围内进行测量。所有研究过的离子液体的热导率都在 0.120–0.150 W·m ^–1 ·K ^–1的范围内，综合扩展不确定度为 0.01 W·m ^–1 ·K ^–1在 95% 的置信水平。在所有情况下，热导率随着温度的升高而降低并遵循线性趋势，这对于大多数液体来说是典型的，并且落在 IL 的报告范围内。两个现有的具有不同建模理念的基团贡献模型 (GCM) 也已针对由该新数据和文献中所有现有 IL 热导率数据组成的数据库进行了扩展和测试。对于整个数据集，扩展的 GCM 分别产生了 5.5% 和 4.9% 的平均绝对相对偏差。