中文摘要：

为揭示润湿性对微纳复合结构表面池沸腾传热的影响，采用电刷镀工艺和表面改性技术在紫铜表面制备了接触角分别为6.5°和148.6°的超亲水性和超疏水性微纳复合结构，通过实验对比研究了不同表面的饱和池沸腾传热特性，结果表明：(1)超亲水性和超疏水性微纳复合结构的最大换热系数较光表面分别提高了3倍和1.5倍；(2)在q<580kW.m-2的低热流密度区，超疏水性微纳复合结构的换热系数最大；当q>580kW.m-2时，超亲水性微纳复合结构的传热性能开始优于超疏水性微纳复合结构；(3)超亲水性微纳复合结构表面的临界热流密度较光表面和超疏水性微纳复合结构分别提高了110%与60%；微纳复合结构显著增加了受热表面的气泡核化密度，而亲水性微纳复合结构的毛细吸液能力要显著强于疏水性微纳复合结构，是临界热流密度增大的主要机理。

英文摘要：

In order to investigate the effects of wettability of Micro/nano-composite structures(MNCS)onpool boiling heat transfer,superhydrophilic(SHP)and superhydrophobic(SHB)MNCS with contact angles of6.5°and148.6°respectively were prepared by electro-brush plating and surface modification.Comparativeexperiments were conducted to investigate pool boiling heat transfer.The results show that the maximum heattransfer coefficient(HTC)of SHP-MNCS and SHB-MNCS are3and1.5times higher than that of bare coppersurface,respectively.When heat flux is smaller than580kW.m-2,SHB-MNCS has the largest HTC.HTC ofSHP-MNCS is superior to that of SHB-MNCS when heat flux surpasses580kW.m-2.SHP-MNCS has themaximum critical heat flux(CHF),which is110%and60%higher than that of bare copper surface andSHB-MNCS,respectively.MNCS can dramatically increase bubble nucleation density,and the capillary liquidsuction ability of SHP-MNCS is better than that of the SHP-MNCS,which is the main factor for CHFenhancement.