Study on the surface properties of wood/polyethylene composites treated under plasma

Yang, Lei; Yan, Tao; Lv, Xinying; Zhang, Yanhua; Di, Mingwei

doi:10.1016/j.apsusc.2010.08.032

Cited by 71 publications

(37 citation statements)

References 14 publications

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“…The increased surface polarity, obtained with 1-butene liquid, improves wettability and penetration behavior (hydrophilicity) of wood (Acda et al, 2012). Several publications also showed that plasma treatment is one of the most effective ways to improve wood wettability and different treatment parameters, which may lead to different surface properties (Custodio et al, 2008;Liu et al, 2010). There are some studies concerning the plasma treatment of wood or wooden materials (Vader Wielen et al, 2006;Wolkenhauer et al, 2007), but no study exists comparing sanding and plasma treatments of wood materials with respect to surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Effects of plasma treatment and sanding process on surface roughness of wood veneers

Demirkır

Aydın²,

Çolak³

et al. 2014

Turk J Agric For

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An ideal veneer surface is crucial for good panel properties in plywood manufacturing. The aim of this study was to compare plasma treatments and sanding (mechanical) processes with respect to the surface roughness of veneers. Rotary-cut veneers with a thickness of 2 mm from Scots pine (Pinus sylvestris) logs were used as material. After rotary peeling, veneer sheets were dried at 110 °C in a veneer dryer. Veneer sheets were divided into 4 main groups. The surfaces of the control veneer sheets were left untreated. Two different grits of sandpaper, 80 and 180, were used for sanding the surfaces of veneers. Plasma treatment was applied to the last veneer group with 3 different gases (oxygen, nitrogen, and ammonia) and 3 different plasma times (1 min, 5 min, and 15 min). The Mitutoyo Surftest SJ-301 instrument was used to determine surface roughness of samples. Average roughness (Ra), mean peak-to-valley height (Rz), and maximum roughness (Rmax) parameters were measured to evaluate the surface roughness of the samples based on DIN 4768. It was found that the smoothest veneer surfaces were obtained with the sanding processes. Surface roughness values (Rz) of veneer sheets sanded with 180 grit sandpaper were lower than those of veneers sanded with 80 grit sandpaper. Compared with the plasma treatment in terms of surface roughness, plasma-treated veneers had higher Rz values. It was also determined that Rz values were the lowest in the veneers treated with nitrogen plasma. Additionally, the surface roughness values of Scots pine veneers treated with ammonia plasma were a little higher than those of veneer sheets treated with oxygen plasma. The effect of plasma treatment time on surface roughness was not found to be statistically significant.

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Section: Introductionmentioning

confidence: 99%

Effects of plasma treatment and sanding process on surface roughness of wood veneers

Demirkır

Aydın²,

Çolak³

et al. 2014

Turk J Agric For

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“…The utilizations of WPC in decking, fencing, railing, siding, and paneling can be effectively extended by adding WPC to structures (Cheng et al 2012). During the manufacturing of WPC structures, adhesive bonding of WPC can achieve a seamless connection of product, overcome the limitations of the molding process, and enrich the varieties of the wood-plastic composite materials (Liu et al 2010). The bonding quality of WPC joints critically affects the strength and life expectancy of the structure (Gramlich et al 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the additives (e.g., paraffin) used during the manufacture of WPC further hinder the formation of excellent WPC adhesion interface. To solve this problem, many works have investigated many surface modification methods to improve WPC adhesion including physical methods, chemical methods, and combined methods (Oporto et al 2007;2009;Laborie and Gupta 2008;Wolkenhauer et al 2008;Liu et al 2010;Moghadamzadeh et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Using Non-Destructive Testing to Determine the Correlation between Dynamic Mechanical Properties and Bonding Strength of Wood-Plastic Composite Adhesive Joints

2015

BioResources

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Wood-plastic composites (WPC) have been developed into new and important wood-based composites because of their benefits for the environment, economy, and recyclability. When combined with structural adhesives, WPCs will have a greatly broadened application in the construction field. In this work, epoxy resin and acrylic ester were used to bond WPC adhesive joints. The shear strength of the adhesive joints was determined and investigated. Resonant frequency and dynamic modulus of elasticity (MOE) of the WPC adhesive joints were measured using the longitudinal vibration method. The correlation between different vibration parameters and shear strength of WPC adhesive joints was also investigated. Results showed that the epoxy resin had a better bonding quality than the acrylic ester on the bonding of WPC adhesive joints. The resonant frequency, dynamic MOE, and the dynamic MOE ratio of the WPC adhesive joints had close correlations with their shear strength for the samples bonded with epoxy resin.

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“…Unfortunately, the polyethylene ingredient present within the polyethylene WPCs results in poor polarity, lower surface energy, and difficult adhesion of the composites (Tahara et al 2003;Gramlich 2006;Liu et al 2010). Hence, a surface treatment is necessary for the polyethylene WPCs to obtain optimal bonding properties.…”

Section: Introductionmentioning

confidence: 99%

Combined Surface Treatment of Polyethylene Wood-plastic Composites to Achieve Rapid Bonding with Desired Adhesion Properties

et al. 2017

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To achieve rapid bonding with desired adhesion properties, a combined treatment of sanding then coating with polyisocyanate, followed by plasma discharge was implemented on the surfaces of polyethylene wood-plastic composites (WPCs). The surface properties of polyethylene WPCs were studied by evaluating the contact angle and bonding strength, as well as analyzing it via Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The results indicated that the shear strength and durability of the bonding joints of polyethylene WPCs increased considerably due to the synergetic effect from the surface treatment. Thus, a rapid bonding with desired adhesion properties of polyethylene WPCs was achieved. The roughness and the oxygen content on the composites' surface increased after the combined treatment. Polar functional groups, such as -OH, -C=O, and -O-C=O, formed on the surface. At the same time, the presence of -NCO and -NH functionalities, generated during the combined treatment, showed that chemical bondings between polyisocyanate and the wood fibers of the composites occurred. The changes on the surface properties, such as roughness, wettability, as well as formation of chemical groups, substantially affected the adhesion properties of the bonding joint for polyethylene WPCs.

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Study on the surface properties of wood/polyethylene composites treated under plasma

Cited by 71 publications

References 14 publications

Effects of plasma treatment and sanding process on surface roughness of wood veneers

Effects of plasma treatment and sanding process on surface roughness of wood veneers

Using Non-Destructive Testing to Determine the Correlation between Dynamic Mechanical Properties and Bonding Strength of Wood-Plastic Composite Adhesive Joints

Combined Surface Treatment of Polyethylene Wood-plastic Composites to Achieve Rapid Bonding with Desired Adhesion Properties

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