Data/hora: 13/06/2024 14:14:48

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	09/02/2015	
Data da última atualização: 	03/02/2016	
Autoria: 	CADEMARTORI, P. H. G. de; BOLZON de MUNIZ, G. I.; MAGALHAES, W. L. E.	
Afiliação: 	Pedro Henrique Gonzalez de Cademartori, Doutorando da UFPR; Graciela Inês Bolzon de Muniz, UFPR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF.	
Título: 	Changes of wettability of medium density fiberboard (MDF) treated with He-DBD plasma.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Holzforschung, v. 69, n. 2, p. 187-192, 2015.	
DOI: 	10.1515/hf-2014-0017	
Idioma: 	Inglês	
Conteúdo: 	The effects of two power levels (50 and 150 W) and five time levels (10, 20, 40, 60 and 120 s) of glow discharge in helium dielectric barrier discharge (He-DBD) has been investigated in the context of surface modification of medium density fiberboard (MDF) panels. He-DBD elevated the surface wettability of MDF panels as assessed by dynamic contact angle (CA) measurements including the determination of surface free energy, droplet volume and spreading contact area of droplets. The chemical changes of the MDF surfaces were also characterized by X-ray photoelectron spectroscopy (XPS). Expectedly, the apparent CA and droplet volume decreased with increasing power and time of glow discharge, mainly at the 150 W power level. The oxygen content of the surfaces, the surface free energy and the spreading contact area increased upon treatment. At higher energy levels the treatment time could be reduced, which is essential for future applications in industrial processes.	
Palavras-Chave: 	Ângulo de contato aparente; Apparent contact angle; Dielectric barrier discharge; MDF; Modificação da superfície; Molhabilidade; Surface free energy; Surface modification; XPS.	
Thesagro: 	Plasma; Tratamento.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (53346-1) - UPC - AP - DD -  -  -  - DIS