Abstract In this study, the stability and thermophysical properties of chemically functionalized and gum-Arabic emulsified carbide-derived carbon (CDC)/ water thermal fluids were investigated. The stability of the thermal fluids were studied through zeta potential measurements and imaging methods. The results indicated that functionalized-CDC has a higher stability than the emulsified-CDC. LAMBDA thermal conductivity analyzer, differential scanning calorimeter, and discovery hybrid rheometer were used to evaluate the thermal conductivity, heat capacity and viscosity of the suspensions, respectively. The results demonstrated that the thermal conductivity enhancement was independent of temperature, decreases with gum-Arabic concentration, and significantly enhanced with CDC loading with a maximum enhancement of 26.1% for 0.3 wt% functionalized CDC. Increasing the CDC loading was found to increase the viscosity and decrease the specific heat of the suspensions. Finally, correlation equations proposed for predicting the thermal conductivity and dynamic viscosity of the CDC-water suspension had R2 values of 0.90 and 0.81, respectively.

中文翻译：

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碳化物衍生碳热流体的稳定性和热物理性能测试；功能化悬浮液与乳化悬浮液的比较

摘要 在这项研究中，研究了化学官能化和阿拉伯树胶乳化碳化物衍生碳 (CDC)/水热流体的稳定性和热物理性质。通过zeta电位测量和成像方法研究了热流体的稳定性。结果表明，功能化-CDC比乳化-CDC具有更高的稳定性。LAMBDA 热导率分析仪、差示扫描量热仪和发现混合流变仪分别用于评估悬浮液的热导率、热容和粘度。结果表明，热导率的增强与温度无关，随阿拉伯树胶浓度而降低，并随着 CDC 负载显着增强，0.3 wt% 官能化 CDC 的最大增强为 26.1%。发现增加 CDC 负载会增加粘度并降低悬浮液的比热。最后，用于预测 CDC-水悬浮液的热导率和动态粘度的相关方程的 R2 值分别为 0.90 和 0.81。