Merugu Saketh, Hasan Md Moynul, Thakur Anupma, Patenaude Jacob, Anasori Babak, Choueiri George, Gupta Anju
Department of Mechanical, Industrial and Manufacturing Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States.
School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
ACS Omega. 2025 Feb 5;10(7):6534-6543. doi: 10.1021/acsomega.4c06988. eCollection 2025 Feb 25.
This study investigates the potential applications of MXenes as an additive in heat-exchanging fluids under atmospheric pressure conditions. A low concentration of 0.1 wt % titanium carbide (TiCT ) MXene-enhanced deionized water altered the boiling regime by demonstrating high critical heat flux (CHF) of 2110.1 kW/m and heat transfer coefficient (HTC) 163.6 kW/m °C, representing a 70.1% increase in CHF and a 213.5% increase in HTC compared to deionized water. Rheological studies were conducted to determine the optimal MXene concentration for long-term stability in the base fluid, ensuring suitability for large-scale industrial applications. Notably, TiCT MXene dispersion demonstrated an 11% enhancement in CHF and a 45% enhancement in HTC compared to the highest reported values for Ag/ZnO-enhanced fluids on plain copper substrates in the literature. This shift in boiling regime is attributed to a combined mechanisms involving thermophoretic and Brownian motion that facilitated the circulation of the TiCT MXene flakes before their stratification on the copper heater surface, which further led to improved interfacial properties such as surface roughness, wettability, and conductivity. This study provides insights on rheological property modulation and TiCT MXene enhanced heat transfer fluid-surface interactions in pool boiling efficiency.
本研究探讨了MXenes在常压条件下作为热交换流体添加剂的潜在应用。低浓度（0.1 wt%）的碳化钛（TiCT ）MXene增强去离子水改变了沸腾状态，其临界热流密度（CHF）高达2110.1 kW/m，传热系数（HTC）为163.6 kW/m²°C，与去离子水相比，CHF提高了70.1%，HTC提高了213.5%。进行了流变学研究，以确定基础流体中MXene的最佳浓度，确保其适用于大规模工业应用。值得注意的是，与文献中报道的在普通铜基板上的Ag/ZnO增强流体的最高值相比，TiCT MXene分散体的CHF提高了11%，HTC提高了45%。沸腾状态的这种转变归因于热泳和布朗运动的联合机制，这促进了TiCT MXene薄片在铜加热器表面分层之前的循环，进而改善了诸如表面粗糙度、润湿性和导电性等界面特性。本研究为池沸腾效率中的流变特性调节以及TiCT MXene增强传热流体与表面的相互作用提供了见解。
