Wood bamboo protection is mainly achieved by means of anti-corrosion, drying, flame retardant and modification. Saving and rational use of wood and bamboo resources is of practical significance for building resource-saving and environment-friendly society, protecting forest resources and improving the ecological environment. Under the support of several projects such as the National Natural Science Foundation, the team led by Professor Bao Binfu of Zhejiang Agriculture and Forestry University has successfully developed a series of new wood bamboo protection agents after more than ten years of research and development, which solves the problem of large toxicity and easy loss of existing wood bamboo protection agents. And other common problems.
Wood and other materials are easy to process and process, and thus become one of the oldest building materials used by humans. Most of the structures of Chinese ancient buildings are also wood structures. However, in the process of use, wood and bamboo are susceptible to fungal attack and decay, mildew, which seriously affects the service life. In order to solve this problem, wood and bamboo materials are often protected against corrosion and mildew. China has a long history of wood protection, especially in wood preservation. In ancient wood preservation, there are various methods for preservative soaking, preservative coating and carbonization. From the construction of the first domestic sleeper anti-corrosion plant in the Dabanshu area of Jinpu Railway in 1911, China's large-scale industrialized wood anti-corrosion has a history of 100 years. However, the research and application of modern wood protection based on new technologies and new technologies such as water-borne wood preservatives and wood modification have only been studied for more than a decade. At present, the total annual consumption of wood in China exceeds 300 million cubic meters, of which construction timber, agricultural support, mining pit wood, furniture, decoration and other consumable wood account for about 2/3, and these woods are basically not treated with anti-corrosion treatment. More than 15% of the wood in foreign countries is treated with anti-corrosion treatment, and some countries even have as high as 50%. On the one hand, China's timber resources are scarce, on the other hand, waste in the process of using wood in China is amazing. According to the State Council's 12th National Development and Reform Commission and other 12 departments, "Opinions on Accelerating Wood Saving and Substitute Work", it is required that by 2010 China's wood anti-corrosion ratio will account for about 5% of domestic commodity wood production, and China's wood bamboo anti-corrosion and protection market potential huge. In recent years, China has strongly advocated and encouraged the protection of wood against corrosion, insects (ants), mildew, drying, flame retardant and modification. Under this circumstance, China's modern wood protection industry has developed from scratch and developed rapidly. At present, the number of wood anti-corrosion enterprises has grown to more than 340, and the annual production capacity of anti-corrosion wood has exceeded 6 million cubic meters. In the past two years, the company has provided more than 2 million cubic meters of anti-corrosion wood to the society every year. According to the calculation of the extended wood use period of 3~8 times, it can save at least 10 million cubic meters of wood per year.
The anti-corrosion wood bamboo can be used for balcony floor, garden platform and road, outdoor tables and chairs, railings, park pavilions, bridges, hydrophilic platforms, flower stands, outdoor garbage bins, etc. Moreover, the local environment formed by wood and bamboo is the closest to nature, which is more in line with people's aesthetic pursuit. In economically developed areas, wooden houses, wooden buildings and landscape facilities are gradually emerging. “Wood is used outdoors as a landscape and must be treated with anti-corrosion treatment to be more economical, more durable and safer.” Professor Bao Binfu, vice president of Zhejiang Agriculture and Forestry University, said, “In the past, the protective agents used in bamboo wood on the market were mainly disabled in Europe and America. Copper chrome arsenic, sodium pentachlorophenol and other toxic substances, and the key technologies are in the hands of foreign technicians. Therefore, our research focus is to find a long-acting, low-toxic protective agent." China's bamboo planting area and The output value of the bamboo industry is the highest in the world, with an area of more than 5 million hectares. The current annual output value is about 90 billion yuan. Compared with wood, bamboo has good recyclability, short production cycle and high output. Today, in the increasingly scarce wood resources, many industries have gradually replaced wood and are widely used. However, during processing, storage and use, it is prone to mold and insects. At present, the methods for preventing mildew and insects in bamboo are high-temperature carbonization and treatment with a protective agent. High-temperature carbonization can kill molds and mites on bamboo and play a protective role. However, during processing, storage and use, if conditions are suitable, mold and insects will also occur, so protection is also needed. Agent treatment. While some bamboo products need to maintain their true color, they must be treated with mildew and insects. “Traditional wood protection agents such as CCA, ACQ and PcP-Na can effectively prevent wood from rot, but have a poor effect on bamboo mold, and because these protective agents contain heavy metals, they are prohibited or restricted in the United States, the European Union, etc., resulting in a lot of Bamboo products cannot be exported," said Bao Binfu. Because some wood bamboo protection agents applied on the market do not meet the requirements of anti-mildew effect or affect the subsequent processing of bamboo materials, they cannot be used for anti-mildew and insect-proof treatment in the processing, storage and transportation of bamboo products. Therefore, there is an urgent need to find a protective agent and treatment technology that is efficient, broad-spectrum, and inexpensive, and is suitable for industrial production of bamboo.
Therefore, accelerate the research and development of new technologies, new processes and new products for wood and bamboo protection, promote the production and consumption of wood and bamboo protection products in China, and develop and produce high-efficiency, low-toxic, multi-species wood. Protective agents have become the main goal of the Bao Binfu team. Since 2000, with the support of the National Natural Science Foundation of China, relevant research institutes and some enterprises, Bao Binfu and the project team members began to carry out scientific research on relevant technologies. Develop bamboo products suitable for the processing, storage and use of bamboo products, especially the anti-mildew products of bamboo wood-based panels, to solve the problem of mildew and mites in the processing, storage and use of bamboo products. The research team developed a modified chitosan with long-acting and low-toxicity by using a natural product chitosan, a glucosamine polymer produced from the shell of crab, shrimp and lobster, instead of the highly toxic substance chromium. The metal complex protection agent overcomes the technical problem of long-lasting and low-toxicity of building wood bamboo protective agent. The team also optimized the organic fungicides and high-efficiency emulsifiers, and invented a water-based organic fungicide protectant with high efficiency and colorlessness. It has overcome the technology of bamboo mold and decorative color. problem. On this basis, the researchers used the non-toxic natural product bamboo vinegar as raw material to create a rapid evaluation method of bamboo vinegar, and invented a non-toxic bamboo vinegar liquid-based protective agent by using emulsification and chelation techniques to solve the wood bamboo. It is difficult for the protective agent to meet the technical difficulties of non-toxic requirements in food packaging and agriculture. At the time of acceptance of the project, Zhang Qisheng, an academician of the Chinese Academy of Engineering, expert in wood processing and wood-based paneling, was appointed as the director. The appraisal committee of the Chinese Academy of Engineering, the forestry engineering and forestry chemical processing expert Song Zhanqian as the deputy director believed that the bamboo board developed by the project The protective agent series products do not contain harmful heavy metals and other substances, and are safe to humans and animals and environmental organisms. The application and promotion of the protective agent series of bamboo wood-based panels can improve the product quality of bamboo products, especially bamboo wood-based panels, expand the application range of bamboo products, and promote the improvement of bamboo products industry in China.