Synthesis and functional features of wood fiber-polypropylene materials: Based on wood fibers with assembling nano-coating via adopting simple in situ-hydrothermal mechanism

摘要

Wood plastic composites (WPCs) are experiencing a dynamic boom. High performance WPCs with excellent mechanical properties, thermal properties, water resistance and ultraviolet absorption features of wood fiber-polypropylene-composites had been fabricated based on wood fibers assembled with nano-SiO2 via hydrothermal method in this research. Coating morphology and assembling ratio were influenced notably by the pH values, Tetra-Ethyl-Ortho-Silicate (TEOS) concentrations and coupling effect of Triethoxysilane (KH550). Tensile strength, flexural strength and thermal transition temperature (T-g) of polypropylene were enhanced due to strong interfacial adhesion and sufficient load transfer. In addition, the initial decomposition temperature of WPCs moved to high-temperature area for shielded nano-network. Besides, for electronic transition and shielding network, it is also noted that ultraviolet absorption and dimensional stability were improved efficiently if adopting coupling nano-coating. After soaking with 24 h, value of water absorption decreased from 12.28 wt% to 2.20 wt%. POLYM. COMPOS., 39:5-13, 2018. (c) 2016 Society of Plastics Engineers