Method for preparing 2D resin-sodium silicate compositely-enhanced poplar

Abstract

The invention discloses a method for preparing 2D resin-sodium silicate compositely-enhanced poplar. The method comprises the following steps: firstly, impregnating 2D resin into wood for chemical bonding, and then impregnating sodium silicate into the wood for reacting and bonding with the 2D resin to form physical and chemical combined filling, thereby obtaining the 2D resin-sodium silicate compositely-enhanced poplar. According to the method, the selected 2D resin and sodium silicate are high in reaction efficiency and good in dipping uniformity, and chemical cross-linking reaction is carried out with the poplar wood as a reaction container, so physical and chemical double filling is formed, the loss resistance of the modified poplar wood is enhanced, the defects of high agent loss and low fixation rate after physical filling and not obviously improved mechanical strength of the modified wood after single chemical dipping are overcome, the physical and mechanical properties of the modified poplar are improved, and dimensional stability is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of functional improvement of wood, and in particular relates to a method for 2D resin-sodium silicate composite reinforcement of poplar. Background technique [0002] Plantation wood is the main raw material of my country's wood industry. The effective use of plantation wood is of great significance to solve the problems of shortage of wood resources and high import dependence in my country. As one of the four fast-growing forests, poplar is widely distributed, has many species, and has a short rotation period and strong adaptability. It can play a good role in wood processing and utilization and ecological environmental protection in my country. However, poplar has defects such as low mechanical strength, poor dimensional stability, flammability and perishability, which limit its application range. , At present, the method of pressure impregnation is mainly used to press the modifier into the wood to achie...

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Problems solved by technology

However, poplar wood has defects such as low mechanical strength, poor dimensional stability, and flammability and perishability, which limit its application range. In order to solve various defects in poplar wood properties and increase its added value, many researchers have carried out impregnation modification on it. At present, the method of pressure impregnation is mainly used to press the modifier into the interior of the wood to achieve the purpose of wood reinforcement

However, the existing method has defects such as low impregnation depth and poor uniformity, and when the two impregnating agents react quickly, the molecules have completed polycondensation to form a macromolecular structure, so it is difficult to enter the wood. Therefore, the applicant believes that it can be Development of new impregnation agents to enhance poplar properties

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