Characterizing the mechanism of improved adhesion of modified wood plastic composite (WPC) surfaces

Oporto, Gloria S.; Gardner, Douglas J.; Bernhardt, G.; Neivandt, David J.

doi:10.1163/156856107782105954

Cited by 36 publications

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“…The polyethylene on the surface of polyethylene WPCs results in poor polarity, low surface energy, and difficult adhesion Oporto et al 2007). In recent years, several techniques have been investigated for solving the adhesion problems of polyethylene WPCs.…”

Section: Introductionmentioning

confidence: 99%

Combined Surface Treatment of Wood Plastic Composites to Improve Adhesion

Zhou¹,

Guo²,

Yan³

et al. 2017

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To improve the adhesion properties, the surfaces of polyethylene wood plastic composites (WPCs) were treated by a combination of sanding then coating with a silane coupling agent, followed by plasma discharge. The surface properties of polyethylene WPCs were studied by assessing the contact angle and bonding strength, as well as implementing Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The results indicated that the roughness of the composites increased during the combined treatment, when compared with the untreated composites. The content of the oxygen elements on the surfaces of the combined treated composites also was found to increase. This indicated that there were polar groups formed, such as -OH, -C=O, and -O-C=O. The surface wettability of the composites improved after the combined treatment. At the same time, chemical bonding between the coupling agent and the wood fibers of the sanding-treated composites occurred. The surface properties of the polyethylene WPCs were changed by the combined treatment, which became favorable for adhesiveness. After the combined treatment, the shear strength and durability of the bonding joints of the composite increased significantly and displayed a synergistic effect from the surface treatment.

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Section: Introductionmentioning

confidence: 99%

Combined Surface Treatment of Wood Plastic Composites to Improve Adhesion

Zhou¹,

Guo²,

Yan³

et al. 2017

BioResources

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“…Many surface treatment methods, such as flame treatment, water treatment, chromic acid treatment, oxyfluorination treatment, oxygen plasma treatment, and coupling agent coating treatment, are found in the present literature Oporto et al 2007;Laborie and Gupta 2008;Wolkenhauer et al 2008;Moghadamzadeh et al 2011;Sogutlu et al 2016;Sogutlu 2017). Besides the individual surface treatments mentioned, a combined treatment was also employed to treat the WPCs materials.…”

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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“…Estos materiales ofrecen ventajas sobre los compuestos tradicionales (polímero/carga mineral), tales como alta resistencia y módulo, baja densidad, menor desgaste abrasivo en la maquinaria de proceso (Gardner et al, 2015;Gupta et al, 2007;Kim y Pal, 2010;Oporto et al, 2007). Con respecto a la madera, WPC tienen mejor estabilidad dimensional en condiciones de humedad, mayor resistencia térmica y al ataque microbiano.…”

Section: Introductionunclassified

“…Para lograr estos propósitos se deben usar junto al adhesivo un segundo componente llamado endurecedor (agente de entrecruzamiento), el cual se mezcla con el adhesivo antes de ser aplicado sobre el substrato (Humar et al, 2011;Lei et al, 2015;Mulonda et al, 2011;Oporto et al, 2007;Rahman et al, 2008).…”

Section: Introductionunclassified

Análisis de Juntas Adhesivas Elaboradas con (Lámina de Madera Plástica) / (Adhesivo Ecológico) / (Lámina de Madera Plástica)

2017

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ResumenSe realizó un estudio experimental para medir la fuerza adhesiva de dos láminas de composición similar unidas con adhesivo. Las láminas se fabricaron a partir de polietileno con 32% de harina Telinne monspessulana y 5,2% de polietileno maleatado. Se usaron dos tipos de adhesivos ecológicos: poliuretano en dispersión acuosa y goma caliente de etilen vinil acetato (hot melt). Los substratos o superficies a unir de cada lámina previamente fueron sometidos a abrasión mecánica. Posteriormente las superficies fueron tratadas por separado con silano vinil-tri(2-metoxi etoxi), primer acrílico y diisocianato. La resistencia a la separación de ambos substratos denominada fuerza adhesiva de la junta, fue determinada aplicando la prueba 180º T-peel adhesión. Los tratamientos químicos aumentaron la resistencia adhesiva de las juntas unidas con poliuretano, los valores más altos se obtuvieron al unir los substratos con adhesivo hot melt sin tratamiento químico. La adición de agente maleatado en el compuesto de madera plástica no mejoró la eficiencia de los tratamientos químicos.Palabras clave: madera plástica; junta adhesiva; polietileno de baja densidad; peel adhesión; primer, adhesivo. Analysis of Bonded Joints Made with (Wood Plastic Composite Sheet) / (Ecological Adhesive) / (Wood Plastic Composite Sheet) AbstractAn experimental study was performed to measure the resistance to adhesive peel strength of two sheets of similar composition bonded with adhesive. The sheets were made from polyethylene with 32% Telinne monspessulana flour and 5.2% maleated polyethylene. Two types of eco-friendly adhesives were used: aqueous dispersion polyurethane and hot melt ethylene vinyl acetate base. The substrates or surfaces to be bonded from each sheet previously were subjected to mechanical abrasion. Subsequently the surface was treated with vinyl tri (2 -methoxyethoxy) silane, acrylic and diisocyanate primers. The resistance to the separation of both substrates also named as adhesive force of the joint, was determined with the test 180º T-peel adhesión. Chemical treatments increased the peeling strength in the bonded joints with polyurethane water-based, however higher values were obtained by joining the substrates with hot melt adhesive without chemical treatment. The addition of maleate in the wood plastic composite did not improve the efficiency of chemical treatments.

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Characterizing the mechanism of improved adhesion of modified wood plastic composite (WPC) surfaces

Cited by 36 publications

References 0 publications

Combined Surface Treatment of Wood Plastic Composites to Improve Adhesion

Combined Surface Treatment of Wood Plastic Composites to Improve Adhesion

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

Análisis de Juntas Adhesivas Elaboradas con (Lámina de Madera Plástica) / (Adhesivo Ecológico) / (Lámina de Madera Plástica)

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