Jothi Prakash C G, Clement Raj C, Prasanth R
UNESCO Madanjeet School of Green Energy Technologies, Pondicherry University, Kalapet 605014, India.
UNESCO Madanjeet School of Green Energy Technologies, Pondicherry University, Kalapet 605014, India.
J Colloid Interface Sci. 2017 Jun 15;496:300-310. doi: 10.1016/j.jcis.2017.01.007. Epub 2017 Jan 5.
Zero contact angle surfaces have been created with the combined effect of nanostructure and UV illumination. The contact angle of titanium surface has been optimized to 3.25°±1°. with nanotubular structures through electrochemical surface modification. The porosity and surface energy of tubular TiO layer play critical role over the surface wettability and the hydrophilicity of the surface. The surface free energy has been enhanced from 23.72mJ/m (bare titanium surface) to 87.11mJ/m (nanotubular surface). Similar surface with TiO nanoparticles coating shows superhydrophilicity with contact angle up to 5.63°±0.95°. This implies liquid imbibition and surface curvature play a crucial role in surface hydrophilicity. The contact angle has been further reduced to 0°±0.86° by illuminating the surface with UV radiation. Results shows that by tuning the nanotube morphology, highly porous surfaces can be fabricated to reduce contact angle and enhance wettability. This study provides an insight into the inter-relationship between surface structural factors and ultra-superhydrophilic surfaces which can help to optimize thermal hydraulic and self cleaning surfaces.
通过纳米结构和紫外线照射的联合作用，已制造出零接触角表面。通过电化学表面改性，钛表面的接触角已优化至3.25°±1°，具有纳米管状结构。管状TiO层的孔隙率和表面能对表面润湿性和表面亲水性起着关键作用。表面自由能已从23.72mJ/m（裸钛表面）提高到87.11mJ/m（纳米管状表面）。类似的涂覆有TiO纳米颗粒的表面显示出超亲水性，接触角高达5.63°±0.95°。这意味着液体吸收和表面曲率在表面亲水性中起着至关重要的作用。通过用紫外线辐射照射表面，接触角进一步减小至0°±0.86°。结果表明，通过调整纳米管形态，可以制造出高度多孔的表面以减小接触角并提高润湿性。本研究深入探讨了表面结构因素与超超亲水性表面之间的相互关系，这有助于优化热工水力和自清洁表面。
