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A Smart Superwetting Surface with Responsivity in Both Surface Chemistry and Microstructure.

Dongjie Zhang1, Zhongjun Cheng2, Hongjun Kang1

  • 1MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.

Angewandte Chemie (International Ed. in English)
|February 13, 2018
PubMed
Summary

Researchers developed a novel smart surface with tunable microstructure and chemistry for precise control over wetting states. This breakthrough enables new applications in rewritable platforms and gradient wetting surfaces.

Keywords:
responsive materialsshape memory polymerssurface chemistrysurface microstructurewettability

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Polymer Science

Background:

  • Smart surfaces with switchable wettability are gaining attention for advanced applications.
  • Existing surfaces have limitations in controlling both surface chemistry and microstructure simultaneously.
  • This restricts their wetting performance, controllability, and range of applications.

Purpose of the Study:

  • To engineer a novel smart surface with dual control over microstructure and chemistry.
  • To achieve precise and reversible control over multiple wetting states, from superhydrophilicity to superhydrophobicity.
  • To demonstrate the application of this surface as a rewritable platform for gradient wetting.

Main Methods:

  • Grafting poly(N-isopropylacrylamide) onto a pillar-structured shape memory polymer.
  • Synergistically regulating surface microstructure and chemistry to control wettability.
  • Utilizing the surface's controllability to create various gradient wetting patterns.

Main Results:

  • A new smart surface with simultaneously tunable microstructure and chemistry was successfully prepared.
  • Multiple wetting states (superhydrophilicity to superhydrophobicity) were reversibly and precisely controlled.
  • The surface demonstrated utility as a rewritable platform capable of producing various gradient wettings.

Conclusions:

  • This work presents the first surface offering simultaneous control over both surface chemistry and microstructure.
  • The findings offer new design principles for advanced superwetting materials.
  • The developed surface opens avenues for novel applications requiring precise wettability control.