Journal
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
Volume 68, Issue -, Pages 188-194Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijadhadh.2016.03.003
Keywords
Wood Plastic Composites; Lap shear; Surface treatment; Adhesion
Ask authors/readers for more resources
Wood Polymer Composites (WPCs) have attracted a lot of interest in recent years as materials with a high renewable content. However the adhesion between WPC components is problematic because of low surface energy and the hydrophobic nature of the most widely used polymer matrices, i.e. polyolefins. Thus this paper has looked at four surface activation pretreatment methods to improve adhesion properties for bonding using epoxy adhesives, namely: hydrogen peroxide solution; hot air; a gas flame; and halogen heating lamps. The treatments were applied to WPC materials made from 60% wood flour in a polypropylene matrix, and lap joint shear strength was measured. Shear strength values showed that all treatments except the halogen heating lamps increased the bond strength and the best results were achieved with hydrogen peroxide treatment at a pH of 7.5 (37% improvement); a two pass hot air treatment at a pass speed of 75 mm s(-1) (44% improvement); and a gas flame treatment at a pass speed of 175 mm s(-1)(41% improvement).The bond strength was increased to values that caused failure within the material, rather than at the interfaces of the bond line. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available