Adhesion performance and film formation of acrylic emulsion coating on medium density fiberboard treated with Ar plasma

Published Date
October 2016, Vol.70:322–328, doi:10.1016/j.ijadhadh.2016.08.002

Author 

Pedro Henrique Gonzalez de Cademartori ^a,

Agne Roani de Carvalho ^b,

Paulo Roberto Dantas Marangoni ^b,

Marcos Antonio Coelho Berton ^b,

Pierre Blanchet ^c,

Graciela Inês Bolzon de Muniz ^a,

Washington Luiz Esteves Magalhães ^d,,

aWood and Forestry Science Center (PPGEF), Federal University of Paraná, Lothário Meissner 900, ZIP code: 80210-170, Curitiba, Brazil

bSENAI Institute of Innovation in Electrochemistry; Av. Comendador Franco, 1341, ZIP code: 80215-090, Curitiba, Brazil

cNSERC Industrial Chair on Ecoresponsible Wood Construction, Wood and Forest Sciences Department, Université Laval, G1V 0A6 2325 Rue de l’Université, Québec City, Québec, Canada

• dEmbrapa Forestry, National Center for Forest Research, Estrada da Ribeira, Km 111 – P.O Box: 319, ZIP code: 83411-000, Colombo, Brazil

Accepted 28 July 2016. Available online 5 August 2016. 

Abstract

This work investigates the adhesion properties of medium density fiberboard (MDF) panel surfaces treated by an argon plasma at two power levels (50 and 150 W) and four glow discharge times (10, 40, 60 and 120 s) and then coated with an acrylic emulsion. Wettability parameters and film formation kinetics were investigated by water apparent contact angle and diffusing wave spectroscopy, respectively. Pull-off strength was used to determine coating/wood adhesion. The aging effect of 300-days in storage at ambient conditions was examined by apparent contact angle measurements. The wettability of the MDF surface was enhanced significantly - especially at the 150 W power level – that improves coating/wood adhesion. A film formation process occurred in shorter time for plasma treated samples due to the faster motion of particles. MDF panels partially recovered their natural hydrophobicity in the first ten days of storage. Nevertheless, higher levels of power and time of glow discharge were able to slow down the aging effects.

Keywords

B.surface treatment

D.wettability

Diffusing wave spectroscopy

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  Correspondence to: Estrada da Ribeira, Km 111 – P.O Box: 319, ZIP code: 83411-000, Colombo, Brazil. Fax: 554136755601.
  
  

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