Data/hora: 06/06/2024 14:09:12

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	24/10/2016	
Data da última atualização: 	04/11/2016	
Autoria: 	CADEMARTORI, P. H. G. de; NISGOSKI, S.; MAGALHAES, W. L. E.; BOLZON DE MUNIZ, G. I.	
Afiliação: 	Pedro Henrique G. de Cademartori, Doutorando da UFPR; Silvana Nisgoski, UFPR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Graciela Ines B. de Muniz, UFPR.	
Título: 	Surface wettability of Brazilian tropical wood flooring treated with He plasma.	
Ano de publicação: 	2016	
Fonte/Imprenta: 	Maderas. Ciencia y Tecnologia, v. 18, n. 4, p. 715-722, 2016.	
DOI: 	10.4067/S0718-221X2016005000062	
Idioma: 	Inglês	
Conteúdo: 	This study investigated the effect of plasma treatment on changes of surface wettability of wood flooring from two Brazilian tropical species, Hymenaea spp. (rode locus) and Tabebuia spp. (lapacho). Wood flooring samples were plasma treated at low pressure in a helium atmosphere. Energy level was set at 100 W and four glow discharge times (5, 15, 30 and 45 s) were tested. Changes in wettability were investigated by measuring apparent contact angle, droplet volume and spreading contact area. The results showed less susceptibility of lapacho wood to the plasma treatments, while reduction of apparent contact angle in rode locus wood reached up to 76% for longer discharge times. In general, discharge time of 15 s produced the same effect as discharge of 45 s on wettability, which is important for industrial applications. Visual analyses revealed increase of water droplet spreading on lapacho wood surface, even though the variation of spreading contact area was not significant. Plasma treatment is feasible to improve wettability of tropical woods. Nevertheless, these findings should be investigated further due to the intrinsic characteristics of woods from tropical species.	
Palavras-Chave: 	Gás hélio; Glow discharge; Helium gas; Molhabilidade; Piso de madeira; Plasma treatment; Spreading; Surface modification; Wetting.	
Thesagro: 	Plasma; Tratamento.	
Thesaurus Nal: 	Contact angle.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/149180/1/2016-Washington-Maderas-Surface.pdf	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (55382-1) - UPC - AP - DD -  -  -  - DIS