Facile transition of surface wettability in hierarchical silica framework: from Wenzel to Cassie-Baxter regime

IF 3.4 4区工程技术 Q2 POLYMER SCIENCE

Macromolecular Research Pub Date : 2025-03-26 DOI:10.1007/s13233-025-00396-5

Sumin Myoung, Giwon Lee, Daegun Kim

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引用次数: 0

Abstract

Facile control of surface wettability is demonstrated by introducing a scalable and cost-effective method using candle soot as a hierarchical template. Through soot deposition, silica sol-gel coating, calcination, and self-assembled monolayer (SAM) treatment, surfaces with tunable wettability from superhydrophobic (contact angle >150°) to superhydrophilic (contact angle = 0°) were fabricated. The hierarchical roughness introduced by soot deposition was instrumental for achieving radically biased surface wettability. Silica coating transformed the soot-coated surfaces to superhydrophilic by increasing surface energy, while calcination created a porous silica framework. SAM treatment restored superhydrophobicity by lowering surface energy and re-establishing the Cassie-Baxter wetting regime. Optimized soot deposition times retained transparency, ideal for optical applications, and mechanical stress testing caused a transition from Cassie-Baxter to Wenzel regime, exhibiting pinning of water droplet. This versatile approach enabled designed surface wettability depending on target purposes.

Graphical abstract

Versatile surface wettability control with candle soot template.

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分层二氧化硅骨架中表面润湿性的快速转变：从Wenzel到Cassie-Baxter体系

通过引入一种可扩展且具有成本效益的方法，以蜡烛烟灰作为分层模板，演示了表面润湿性的简单控制。通过烟尘沉积、硅溶胶-凝胶包覆、煅烧和自组装单层（SAM）处理，制备了从超疏水（接触角>；150°）到超亲水（接触角= 0°）的可调润湿性表面。由烟灰沉积引入的等级粗糙度有助于实现完全偏置的表面润湿性。二氧化硅涂层通过增加表面能将煤烟涂层表面转变为超亲水性，而煅烧形成多孔二氧化硅框架。通过降低表面能和重建Cassie-Baxter润湿机制，SAM处理恢复了超疏水性。优化的烟尘沉积时间保留了透明度，非常适合光学应用，机械应力测试导致从Cassie-Baxter到Wenzel的过渡，显示出水滴的钉住。这种通用的方法可以根据目标目的设计表面润湿性。图形抽象通用的表面润湿性控制与蜡烛烟灰模板。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Macromolecular Research 工程技术-高分子科学

CiteScore

4.70

自引率

8.30%

发文量

100

审稿时长

1.3 months

期刊介绍： Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.