Clustered Ribbed-Nanoneedle Structured Copper Surfaces with High-Efficiency Dropwise Condensation Heat Transfer Performance

被引：155

作者：

Zhu, Jie ^{[1
]}

Luo, Yuting ^{[1
]}

Tian, Jian ^{[1
]}

Li, Juan ^{[1
]}

Gao, Xuefeng ^{[1
]}

机构：

[1] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Nanobion Div, Adv Thermal Nanomat & Devices Res Grp, Suzhou 215123, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 20期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

superhydrophobic; clustered ribbed-nanoneedles; condensate microdrop self-propelling; high-density nucleation; enhanced heat transfer; SUPERHYDROPHOBIC SURFACES; WATER; NUCLEATION; COLLECTION; GRADIENT;

D O I：

10.1021/acsami.5b02376

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report that the dropwise condensation heat transfer (DCHT) effectiveness of copper surfaces can be dramatically enhanced by in situ grown clustered ribbed-nanoneedles. Combined experiments and theoretical analyses reveal that, due to the microscopically rugged and low-adhesive nature of building blocks, the nanosamples can not only realize high-density nucleation but constrain growing condensates into suspended microdrops via the self-transport and/or self-expansion mode for subsequently self-propelled jumping, powered by coalescence-released excess surface energy. Consequently, our nanosample exhibits over 125% enhancement in DCHT coefficient. This work helps develop advanced heat-transfer materials and devices for efficient thermal management and energy utilization.

引用

页码：10660 / 10665

页数：6

共 28 条

[1]

[Anonymous], 1982, Liquid-vapor Phase-Change Phenomena

[2]

[Anonymous], 1930, ENG MECH THERMODYN

[3] Dew nucleation and growth [J].