Wet ability of PTFE coated diamond films

SURFACE & COATINGS TECHNOLOGY

卷:232

Article

Vasconcellos de Siqueira Brandao, L. E.¹  Fassini Michels, A.²  Camargo, K. C.³  Balzaretti, N. M.^1,3  Horowitz, F.³ 

[1] Univ Fed Rio Grande do Sul, PGCIMAT, BR-91501970 Porto Alegre, RS, Brazil

[2] UCS, Ctr Ciencias Exatas Nat & Tecnol, BR-95070560 Caxias Do Sul, RS, Brazil

[3] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

关键词: CVD diamond film;    coatings;    wet ability;    superhydrophobicity;   

DOI  :  10.1016/j.surfcoat.2013.05.039

来源: Elsevier

【 摘 要 】

The wet ability of micro and nanocrystalline diamond films (MCD and NCD) coated with PTFE was investigated. The diamond films were grown by microwave plasma CVD with and without nitrogen addition. Both surfaces of the diamond films were evaluated by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Apparent, advancing and receding water contact angles (WCA) were measured before and after the PTFE coating. The roughness of the microcrystalline diamond films together with the nanostructured PTFE coating resulted in super hydrophobic surfaces with water contact angle of 165 degrees +/- 2 degrees and very low hysteresis (4 degrees). For nanocrystalline diamond films, the contact angle was also very high (149 degrees +/- 2 degrees) but the hysteresis remained above 90 degrees. (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

Free