Effect of Liquid Oxidation Surface Treatment on Bonding Properties of Wood/Polyethylene Composites

Abstract

In this paper the surface of wood/polyethylene (PE) composites were treated by liquid oxidation, and the structure of surface for wood/polyethylene composites before and after treatment was characterized by contact angle, fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM); combined with bonding strength test, the effect of concentration for handling solution and addition of oxidant on bonding properties of wood/polyethylene composites was also investigated. The results showed that the contact angle of surface for wood/polyethylene composites reduced and the surface wettability had been improved after liquid oxidation; the -C-O- and C=O functional groups were formed on the treated surface and the surface roughness increased; meanwhile, the shear bonding strength for the treated sample increased significantly after treatment. And these changes would be more obvious when enhancing the concentration of handling solution and adding oxidant.

Effects of Chromic Treatment on the Surface Properties of Polypropylene (PP) Wood Composites

“…A decrease in the contact angle resulted in better surface wettability. The work of Teng et al [14] showed that the chromic treatment reduced the contact angle for wood-HDPE composites, and Moghadamzadeh et al [15] noted a decrease in the contact angle from 83 to…”

“…Teng et al [14] demonstrated that the surface of the wood/polyethylene composites decreased and the surface's wettability improved after liquid oxidation; the functional groups -C-O-and C=O were formed on the treated surface, and the surface roughness increased. Thus, after treatment, the shear bond strength of the treated sample increased significantly.…”

Effects of Coating on the Dimensional Stability of Wood-Polymer Composites

“…However, knowledge of the surface properties of the composite is essential for the development of a suitable coating system. Teng et al [21] demonstrated that the contact angle of the surface of wood/polyethylene composites decreased. The surface's wettability improved after liquid oxidation and led to the formation of -C-O-and C=O functional groups on the treated surface, and the surface roughness increased.…”

The effect of four methods of surface activation for improved adhesion of wood polymer composites (WPCs)

“…A greater number of studies have addressed the use of corona and plasma treatments for WPC materials [10,12,15,16,17,18] than have investigated mechanical [10,15] or flame [15,19] or chemical [10,12,20] treatments for WPCs. Plasma and flame treatment options are suitable for use in factory production, however many WPC applications utilise relatively low investment technology, and a workshop scale of production.…”

“…Due to its relatively high cost epoxy resin is a less commonly used adhesive for wood jointing in furniture industry [21], however it is widely used for polymer composites. Many researchers [10,15,19,20] have used epoxy resin as the adhesion system for studies on WPC materials. A preliminary study on WPC materials [22] had compared lap shear strength of epoxy with the more traditional wood glues: PVA and polyurethane.…”