表面技术2025，Vol.54Issue(14)：172-183,12.DOI:10.16490/j.cnki.issn.1001-3660.2025.14.016
基于超疏水表面抑霜初期实验研究
Experimental Study on the Initial Stage of Frost Suppression Based on Superhydrophobic Surface
摘要
Abstract
The study of the condensation and freezing characteristics during the initial stage of frost formation on superhydrophobic surfaces is of paramount importance for understanding the mechanisms involved in frost suppression.The work aims to focus on studying the behaviors of condensation and freezing on superhydrophobic surfaces,which is critical for developing effective strategies to mitigate frost accumulation in various applications,including energy systems,aerospace,and transportation.In this study,a simple and cost-effective secondary spray coating method was employed to prepare the necessary surfaces for experimentation.This method allowed for the efficient fabrication of surfaces that exhibited the required hydrophobic and superhydrophobic properties,thereby facilitating a systematic investigation into their frost formation characteristics.Following the preparation of these surfaces,a visual low-temperature experimental platform was utilized to conduct a detailed study of the condensation and freezing behaviors exhibited on different wettability surfaces,including a bare aluminum surface,a hydrophobic surface,and two types of superhydrophobic surfaces designated as surfaces A and B.To explore the effects of varying cold surface temperatures on the condensation and freezing characteristics,a range of experimental conditions was established.For condensation characteristics,cold surface temperatures of Tw=3,0,and-3 ℃were investigated,while for freezing characteristics,temperatures of Tw=-3,-6,and-9 ℃ were examined.The experimental findings revealed a consistent trend that under the same operational conditions,surfaces with larger contact angles were associated with smaller radii of condensed water droplets,lower surface coverage,and longer time periods required for droplet freezing.Compared with the freezing time of super B surface,the freezing time of bare aluminum,hydrophobic and super A surface was shortened by 92.8％,70.3％and 45.9％respectively.The unique properties of superhydrophobic surfaces played a significant role in these observations.These surfaces were characterized by low surface energy and specific micro/nano structures that resulted in poor wettability and low spreading coefficients.Consequently,spherical droplets that formed on superhydrophobic surfaces frequently experienced merging and jumping phenomena.Some droplets could bounce off the surface while carrying adjacent droplets along with them,leading to the creation of numerous dry areas on the surface.This resulted in a significantly reduced surface coverage.Notably,the distances between droplets often exceeded the critical distance required for ice bridge formation,which effectively inhibited the propagation of ice bridges and thus contributed to frost suppression.Furthermore,the wettability of the surface had a profound impact on the nucleation barrier for droplet formation.It was observed that the larger the contact angle of the surface droplets,the higher the nucleation barrier became.This relationship resulted in slower growth rates of the droplets and a decrease in their coverage on the surface.Ultimately,these factors collectively enhanced the frost suppression capabilities of the superhydrophobic surfaces being studied.In summary,this study elucidates the intricate interplay between surface wettability,droplet dynamics,and thermal conditions,demonstrating how specifically engineered superhydrophobic surfaces can effectively mitigate frost formation.The insights garnered from this study not only deepen the understanding of frost suppression mechanisms,but also pave the way for future innovations in materials designed for frost resistance.Such advancements are essential for improving performance in various fields where frost control is critical.关键词
超疏水表面/凝结/冻结/冰桥/可视化Key words
superhydrophobic surface/condensation/freezing/ice bridge/visualization分类
通用工业技术引用本文复制引用
潘仕顺,盛伟,李志永,王云朋,刘思楷,麦尔祖克江·巴衣孜..基于超疏水表面抑霜初期实验研究[J].表面技术,2025,54(14):172-183,12.基金项目
国家自然科学基金(52266001)National Natural Science Foundation of China(52266001) （52266001）
