According to the characteristics of the composite process of wood-plastic composite materials, additives with different functions can be added in the preparation process of wood-plastic composite materials to endow wood-plastic composite materials with new functions, so as to meet the needs of different environments. The functionalized wood-plastic composite material can expand its application range and increase the added value of wood-plastic products, which is of great significance to the development of wood-plastic composite materials.
Both wood powder and plastic are combustible, and wood-plastic composite materials can be combined with flame retardants to prepare wood-plastic composite materials with flame-retardant effects. In order to enhance the flame retardancy of polypropylene wood-plastic composites, ammonium phosphate organophosphorus nitrogen flame retardants and organic silicon flame retardants can be selected for compounding. After compounding, the limiting oxygen index of the wood-plastic composite material can be improved, thereby improving its flame retardancy. On this basis, adding modified carbon black, expanded graphite or other conductive materials can increase the antistatic function on the basis of flame retardancy and reduce the surface resistivity at the same time. In addition, the temperature-sensitive color-changing material can be combined with the wood-plastic composite material, so that the wood-plastic composite material can be expressed through color changes when the ambient temperature changes. For example, heat-sensitive color-changing materials are made into microcapsules and added to wood-plastic or bamboo-plastic composites to make them have temperature-sensitive color-changing functions.
Because the wood-plastic composite material is a low-carbon, environmentally friendly, recyclable and sustainable green building material. If phase change heat storage is introduced into wood-plastic composite materials and applied in buildings or building interiors, the energy consumption of buildings can be reduced, which is of great benefit to the improvement of energy utilization.