Surface wettability and roughness of 11 Amazonian tropical hardwoods

Floresta e Ambiente

Mário Rabelo de Souza¹  Patrícia Gomes Ribeiro²  Marcela Regina Siqueira Amorim²  Sabrina Andrade Martins²  Cláudio Henrique Soares Del Menezzi² 

[1] ;Universidade de Brasília;

关键词: wettability;    contact angle;    surface roughness;   

DOI  :  10.4322/floram.2012.069

来源: DOAJ

【 摘 要 】

The purpose of this study was to evaluate the wettability and surface roughness of 11 Amazonian hardwoods. Surface roughness was evaluated by a profilometer, while wettability was measured by a goniometer. Distillated water and phenol-formaldehyde were employed to study wood wettability. A 10-μL drop was placed on the wood surface and the contact angle was measured every 2 seconds for 120 seconds. The Virola michelii and Trattinnickia burserifolia wood specimens analyzed presented different roughness values according to the surface evaluated, radial or tangential. Regarding wettability, Virola michelii wood showed the lowest water contact angle on the tangential surface, while the radial surface presented better wettability for phenol-formaldehyde. The wettability of the species studied was not clearly affected by surface roughness, which depends on wood density.

【 授权许可】

Unknown