A fast method to prepare highly isotropic and optically adjustable transparent wood-based composites based on interface optimization

Abstract

The production design of transparent materials using wood flour as the substrate aims to improve the value-added utilization rate of waste wood, and explore the preparation process of energy-saving building materials. This paper reports a rapid method for the preparation of transparent wood-based composites (TW-OTS) with high isotropy and optical adjustability, which changes the high energy consumption of bleaching wood flour in the past. Using the fluffy and porous structure of wood flour, the wood flour was bleached by hydrogen peroxide drop coating method assisted with ultraviolet light, and then hydrophobicized and impregnated with epoxy resin. The interfacial bonding and optimization mechanism of organic polymer Octadecyl trichlorosilane (OTS), wood fiber and resin at the micro scale were systematically studied in order to improve the optical parameters, mechanical strength and thermal properties of the composites, so as to balance the relationship between the structure and properties. TW-OTS based on interface optimization has excellent transmittance (80.1 %), thermal insulation performance, mechanical strength, and biocompatibility. If 1 % chitosan is added to the resin, the antibacterial properties of the sample can be added. This material can be used in energy-saving building windows, medical equipment, ecological home products, and other fields.