Dopamine/Silica Nanoparticle Assembled, Microscale Porous Structure for Versatile Superamphiphobic Coating

ACS Nano
Fang LiQiang Zheng

Abstract

Artificial superamphiphobic surfaces, which could repel both water and low surface tension organic liquids, have been limited to particular kinds of materials or surfaces thus far. In this work, a kind of microscale porous coating was developed. Taking dopamine and hydrophilic fumed silica nanoparticles as initial building blocks, microscale porous coating was constructed via ice templation. Polydopamine bound silica nanoparticles together to form a porous structure network and rendered the coating to have potential for further postfunctionalization. After two-step CVD, the microscale porous coating changes from superhydrophilic to superamphiphobic, exhibiting super-repellency to droplets with surface tension of 73-23 mN/m. The influences of concentration of initial dopamine, hydrophilic fumed silica nanoparticles, and dry conditions on the formation of the porous structure have been studied to optimize the conditions. Coatings with different pore sizes and pore heights have been fabricated to discover the relationship between the structure parameters and the repellency of the porous coatings. Only with optimal pore size and pore height can the porous coating display superamphiphobicity. Compared with nanoscale, the microscale ...Continue Reading

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Oct 8, 2016·ACS Applied Materials & Interfaces·Christoph SchlaichRainer Haag
Feb 23, 2017·ACS Applied Materials & Interfaces·Lu JiangDennis W Hess
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Sep 12, 2020·ACS Applied Materials & Interfaces·Tao WangSheng Wang
Jun 20, 2020·ACS Applied Materials & Interfaces·Stanislav KlimchukJunjie Niu

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