Abstract
Wood plastic composite was fabricated using high density polyethylene and pine wood fiber. The effect of addition of TiO2 nanoparticles at different weight fractions (0%, 1%, 3%, and 5%) on some properties of the composite was examined. The experimental composites were tested for bending strength, tensile strength, Izod impact strength, thickness swelling, and contact angle. Field emission scanning electron microscopy was also investigated to study the distribution of TiO2 nanoparticles in the composites. The results showed that using TiO2 nanoparticles as a reinforcing agent in wood plastic composites resulted in an increase in the tensile and bending strengths and a decrease the thickness swelling of the composites. The effect of TiO2 nanoparticles on the Izod impact strength of composites was not significant. The results also showed that the contact angle of wood plastic composites was improved by using TiO2 nanoparticles.
Highlights
In recent years, the production of wood plastic composites has increased in the thermoplastic industry, and it is expected to continue to increase
The variance analysis showed that the effect of TiO2 nanoparticles on the contact angle of composites had a significant difference of 5% (Table 2)
The work presented in this paper investigated mechanical and physical properties of wood/polyethylene
Summary
The production of wood plastic composites has increased in the thermoplastic industry, and it is expected to continue to increase. The raw materials used to process wood plastic composite are mainly polyolefin thermoplastics, such as polyethylene (PE), polypropylene (PP), or polyvinylchloride (PVC), and wood flour or fibers mainly from softwood like spruce or pine (Jiang and Kamdem 2004, Selke and Wichman 2004, Kumar et al 2011) These wood plastic composites offer several advantages, including enhancement of specific properties such as stiffness and thermal behavior, reduced price of the material, and improved recyclability compared with traditional glass fiber-reinforced plastics (Miki et al 2014). Most wood plastic composite product applications to date, including residential deck boards, rails and balusters, window lineal, door components, boat hulls, and automotive components, have modest structural requirements These composite materials do not have adequate mechanical properties for typical structural applications (Lei and Wu, 2012). Surface-to-volume ratio of nanoparticles increases with decreasing feature size, and for feature sizes that are small enough, their properties are no longer dominated by the bulk of the material but by surface atoms (Biener et al 2009)
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