Effects of plasma modification on adhesion properties of wood

Effects of plasma modification on adhesion properties of wood

The study investigated the use of dielectric barrier discharge for surface modification to improve adhesion properties of Shorea contorta (white lauan), Gmelina arborea (yemane) and Acacia mangium. Wood specimens were exposed to oxygen plasma at intensity levels ranging from 5.8 to 46.5 kW min/m 2 t...

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Bibliographic Details
Published in:International journal of adhesion and adhesives Vol. 32; pp. 70 - 75
Main Authors: Acda, Menandro N., Devera, Edgar E., Cabangon, Rico J., Ramos, Henry J.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 2012
Elsevier
Subjects:
Adhesion
Application fields
Applied sciences
Atomic force microscopy
Coating
Exact sciences and technology
Plasma
Polymer industry, paints, wood
Polyurethane resins
Shear strength
Strength
Surface modification
Technology of polymers
Urea formaldehyde resins
Wood
Wood-based materials
Wood. Paper. Non wovens
Plasma
Surface modification
Atomic force microscopy
Wood
Adhesivity
Coating material
Laminate
Plasma assisted processing
Mechanical properties
Shear strength
Experimental study
Property processing relationship
Surface treatment
Aminoplast
Plywood
Polyurethane
Adhesive joint
Surface properties
Adhesive
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Summary:The study investigated the use of dielectric barrier discharge for surface modification to improve adhesion properties of Shorea contorta (white lauan), Gmelina arborea (yemane) and Acacia mangium. Wood specimens were exposed to oxygen plasma at intensity levels ranging from 5.8 to 46.5 kW min/m 2 to improve adhesion of phenol formaldehyde, urea formaldehyde resins and polyurethane coating. Work of adhesion was calculated based on contact angle measurements to determine thermodynamic changes on plasma modified wood. Surface characteristic was evaluated using atomic force microscopy (AFM). Results of the study showed that plasma modification resulted in significant improvement in work of adhesion for the three wood species investigated. Mechanical tests of plywood and wood laminates using plasma treated S. contorta glued with phenol or urea formaldehyde resins indicated improvement in shear strength of adhesive joints. No improvement or decrease in shear strengths were observed for plasma treated G. arborea and A. mangium. Pull off strengths of polyurethane coating on plasma treated S. contorta and A. mangium specimens showed slight improvement in strength of coated film. Effects of plasma treatment on adhesion properties of wood appear to be species specific and vary with process parameters.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0143-7496
1879-0127
DOI:10.1016/j.ijadhadh.2011.10.003