Basic research status and development in wood-based scrimber in China

Wood-based scrimber is a new type of high-performance wood composite materials, in the process of directional recombination, a series of complex physical and chemical changes have taken place in wood and bamboo under the action of wet-heat-force and resin polymerization, and the original structural characteristics of wood and bamboo have changed significantly, forming a new multi-dimensional structure of wood-based scrimber. The formation of this new structural feature makes the physical and mechanical properties of the recombinant materials improved greatly compared with the properties of the original wood and bamboo. The new functions of flame retardant, anticorrosion, mildew resistance, weather resistance, and insect control of the wood-based scrimbers can be given by adding different additives in the process of recombination, which can overcome the defects such as soft material, low strength, uneven material and easy cracking in the artificial fast-growing forest. It solves the problems of small grade, easy cracking, and unequal material of bamboo, and can be used to replace high-quality wood, steel, cement, plastic, and other building materials. It has a wide range of prospects and is one of the effective ways to realize the efficient utilization of wood and bamboo in plantations. The macro and micro evolution of wood and bamboo in the process of recombination, the formation mechanism of multi-scale structure and multi-level adhesive interface of wood-based scrimbers, and the effects of multi-dimensional structure on the physical and mechanical properties of wood-based scrimbers were comprehensively reviewed, the viewpoint of cell selective enhancement of wood-based scrimbers was put forward, and the scientific problems to be solved in wood-based scrimbers were summarized. It is suggested that the theoretical basis, manufacturing basis, and application basis of wood-based scrimbers should be studied at the cellular and molecular level, and the theoretical system of wood-based scrimbers should be constructed, so as to provide basic theory and technical support for the important national strategy of efficient utilization of wood resources in artificial fastgrowing forests.