Utilization of Municipal Plastic and Wood Waste in Industrial Manufacturing of Wood Plastic Composites
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ORIGINAL PAPER
Utilization of Municipal Plastic and Wood Waste in Industrial Manufacturing of Wood Plastic Composites Dildare Basalp1 · Funda Tihminlioglu1 · Sait C. Sofuoglu2 · Fikret Inal1 · Aysun Sofuoglu1 Received: 20 September 2019 / Accepted: 23 February 2020 © The Author(s) 2020
Abstract In this study, Wood Plastic Composites (WPCs) were produced from post-consumer bulky wastes of recycled plastic and wood in order to minimize waste, decrease environmental effects of plastics, reserve natural resources, and support circular economy for sustainable production and consumption. Five different types of polypropylene (PP) or polyethylene (PE) based recycled plastics and wood obtained from urban household bulky wastes were used in the production of recycled WPC composites, r-WPCs. Virgin WPC (v-WPC) and r-WPC compounds were prepared with wood flour (WF) and maleic anhydride grafted compatibilizer (MAPP or MAPE) to evaluate the effect of recycled polymer type and compatibilizer on the mechanical properties. It was found that tensile strength properties of r-WPCs produced from recycled PP (r-PP) were higher than that of the r-WPCs produced from mixed polyolefins and recycled PE. r-WPCs containing anti-oxidants, UV stabilizers, and compatibilizer with different WF compositions were produced from only recycled garden fraction PP (PPFGF) to determine the optimum composition and processing temperature for pilot scale manufacturing of r-WPCs. Based on tensile, impact, flexural, and water sorption properties of r-WPC compounds with different formulations, the optimum conditions of r-WPC compounds for industrial manufacturing process were determined. Surface morphology of fractured surfaces as well as tensile, flexural and density results of r-WPC compounds revealed the enhancement effect of MAPP on interfacial adhesion in r-WPCs. r-WPC products (crates and table/chair legs) based on bulky wastes were produced using an injection molding process at industrial scale by using 30 wt% WF-filled r-WPC compound. This study demonstrated that r-WPC compounds from recycled bulky plastic and wood wastes can be used as a potential raw material in plastic as well as WPC industry, contributing to circular economy. Graphic Abstract
Keywords Wood plastic composite · Recycling · Bulky plastic waste · Mechanical property · WPC manufacturing
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Statement of Novelty Bulky waste is a significant and increasing waste stream in every country due to change in habits and economic status resulting in finding affordable goods for the fast replacement. Municipal bulky waste stream could be treated as source if valorisation pathways have been studied. This study indicates valorisation of municipal plastics and wood waste as raw materials in WPC manufacture. The utilization of recyclable resources is imperative for sustainability, due to the increase in plastic waste in cities and the depletion of resources. In this concept, the evaluation of different t
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