Preparation and Properties of Wood Plastic Composites Based on Tea Residue

In this research a type of wood plastic composites (TR-WPCs) is prepared by blending tea residue (TR) with high-density polyethylene (HDPE). The chemical composition of TR was analyzed quantitatively. The effects of TR content, compatibilizers, and nanofillers on the structure, morphology, and mechanical properties were studied. The results showed that the stiffness of TR-WPCs was significantly improved with the increase in TR, while the strength and toughness decreased. Scanning electron microscope indicated that the maleic anhydride grafted polyethylene as compatibilizer enhanced interface adhesion of the composites; Thermo-gravimetric analysis and Vicat test showed that the composite made with the nanofiller could improve the heat stability and heat resistance. Differential scanning calorimetry indicated that the addition of inorganic fillers slightly influenced the crystallization behavior of the HDPE matrix. The TR with boiling water treatment could significantly improve the mechanical properties of the composites. (C) 2014 Society of Plastics Engineers