초발수 표면의 기체층의 주기적 회복을 통한 장기 방오성능 향상

Abstract

Superhydrophobic (SHPo) surface have anti-fouling by low adhesion force and surface energy because their surface structures can hold a slippery gas layer between the solid surface and the liquid. However, the gas layer of SHPo surfaces cannot infinitely maintain under liquid circumstance because of liquid pressure or degradation of hydrophobicity. In this paper, to retain the semi-permanent anti-fouling surface, we fabricated a gas generation surface using photolithography and lamination technique. To evaluate the working of the gas generation surface, a relative reflectivity test was investigated and a degraded air layer recovered to ~90% of initial state by gas restoration. The attachment of Pseudomonas aeruginosa (P. aeruginosa) was investigated for 24 hours under static condition using fluorescence imaging of attached bacterial cell. The results show that the restored SHPo surface by gas generation had little bacteria fouling and it exhibits the superior anti-biofouling performance by continuous gas layer for 24 hours.