Thermal and three-body abrasion behaviors of alkali-treated eucalyptus fiber reinforced polyvinyl chloride composites

Abstract

Wood-plastic composites (WPCs) have been widely used as exterior construction materials. The effect of alkali-treated (with NaOH concentrations of 1%, 3%, 5%, and 7%) eucalyptus fiber on the three-body abrasion behaviors of eucalyptus/polyvinyl chloride (PVC) composites was investigated. The results showed that the eucalyptus fiber treated with NaOH had a higher crystallinity and improved hardness and impact strength. The wear loss and rate of alkali-treated eucalyptus/PVC composites was noticeably decreased compared to the natural eucalyptus fiber. The scanning electron microscopy (SEM) examination on the worn surfaces revealed that the main wear mechanism of the eucalyptus/PVC composites was a combination of microcutting and microindentations.

Preparation and properties of PVC composites filled with walnut shell powder hybrid attapulgite

“…0A3AT, 3A0AT, and 3A3AT are significantly lower than 0A0AT, indicating that ATP hybrid of WS and alkali treatment of WS are capable of enhancing the composites' abrasive wear resistance, and 0A3AT has the best wear resistance, which is consistent with the change of physical and mechanical properties exhibited by the composites. According to previous studies, the physical and mechanical properties of materials are closely related to their wear resistance, 62 therefore, 0A3AT has excellent wear resistance relying on its good physical and mechanical properties. Thermal stability analysis showed that alkali treatment and ATP filling improved the composites' thermal stability, which reduced the effect of friction heat on the composites in the wear process.…”

“…The capillary transfer of water in the gap of the two-phase interface of the composites is one of the infiltration mechanisms, while ATP blocked the gap as a water transfer channel and inhibited the water penetration into composites deep layer, 60 conforming to the study by Vigneshwaran et al, 61 who added 20% red mud to the composites, and found that the water absorption decreased significantly, and adding red mud particles in the matrix hindered the diffusion of water molecules in the composites. According to previous studies, the physical and mechanical properties of materials are closely related to their wear resistance, 62 therefore, 0A3AT has excellent wear resistance relying on its good physical and mechanical properties. Thermal stability analysis showed that alkali treatment and ATP filling improved the composites' thermal stability, which reduced the effect of friction heat on the composites in the wear process.…”

Effect of operating parameters and abrasive particle size on three-body abrasion performance of alkali-treated eucalyptus fiber reinforced polyvinyl chloride composite

“…Previously, the three-body abrasion behaviors of eucalyptus and PVC composite were investigated under fixed operating parameters (Zhang et al 2019). One important method for enhancing the wear resistance of wood-plastic composites is alkali treatment (Alawar et al 2009;Phuong et al 2010;Saha et al 2010;Yousif et al 2010b).…”

“…One important method for enhancing the wear resistance of wood-plastic composites is alkali treatment (Alawar et al 2009;Phuong et al 2010;Saha et al 2010;Yousif et al 2010b). The 5% NaOH alkali-treated eucalyptus and PVC composites had a noticeably improved threebody abrasion resistance (Zhang et al 2019). The purpose of this study is to explore the effect of operating parameters such as applied load, sliding velocity, sliding distance, and the abrasive particle size on three-body abrasion behaviors of alkali-treated eucalyptus fiber reinforced PVC composites for potential engineering applications.…”