Researchers at South China University of Technology have successfully developed "green" nanocomposite sheets (NC sheets) using nanotechnology. They have become an ideal alternative to traditional plywood due to their high environmental friendliness, low cost, and excellent performance. Industry prospects.
At present, the annual consumption of plywood in China exceeds 14 million cubic meters. The production of plywood not only consumes large amounts of logs, but also the use of wood, formaldehyde phenol or urea resin after hot pressing, free formaldehyde will slowly release over a long period of time, become a home Decoration is an important source of pollution. There have been many cases of illness or even death caused by formaldehyde poisoning in China. The development of plywood substitutes has become an important research field in the building materials industry.
In May last year, South China University of Technology's Polymer Structure and Modification Laboratory took the lead in putting forward the concept of “green†nanocomposite technology (NC technology) and combining bionics, green chemistry, and nanotechnology to create new structural materials and functions. Products. At present, the NC technology project of South China University of Technology has obtained 3 invention patents granted by the State Intellectual Property Office, and it is also the only project for the collection of nanomaterials in China.
Compared with plywood, NC board has extremely high environmental protection. The use of sand, stone, soil, agricultural and fishery and other wastes and renewable resources as the main raw materials, according to the different conditions of different places to change the ratio of raw materials to produce different types of products, such as concrete template mainly to chaff, wheat straw as raw material, adding A small amount of clay, soil, in order to reduce the brittleness of the clay, improve the impact strength of the product, with waste tires, rubber, plastics, etc. to increase flexibility. Waste tires, rubber, plastics and other raw materials do not need to be degraded because they have strong thermoplastic properties, can be reprocessed, reshaped and recycled.
From the cost point of view, the raw materials used in the production of NC boards not only save a lot of natural wood, but also greatly reduce the cost of products, which is about 20% lower than the cost of plywood, and thus solves the long-term cost of chemical materials due to synthetic resins, and the price can not be compared with natural wood. The problem of competition.
From the performance point of view, the NC board has a specific gravity of 0.6-0.7 g/cm3, which is smaller than the plywood. When it is used as a template for concrete construction, the weight is lighter, and the burden on high-level operations is reduced, which is 5 to 6 times longer than that of plywood; ,No formaldehyde and other toxic gases pollution;High compressive strength,applicable to the container bottom plate,At present, this kind of plate must also be imported from South Korea;The sound absorption,sound insulation,and shock absorption are all greater than plywood,resistant to rain,suitable for sound insulation materials, Outdoor advertising, etc.; not moldy, insects do not bite, is the ideal material for food and beverage shelves. In addition, NC technology can further develop non-combustible products to replace solids, flooring, doors, baths and other sanitary ware, as well as vehicles, boats and other vehicles inside and outside the shell and interior decoration materials.
From the perspective of industrialization, the cost of NC board is reduced by about 20% compared with plywood, and the product has a larger market space and competitiveness in terms of price. A production line investment needs 5 million yuan, after the completion of an annual output of 2,000 tons (3000 cubic meters), the annual output value of up to 21 million to 30 million yuan, profits and taxes 5 million to 9 million, the economic benefits are considerable.
It is understood that the project has now completed the pilot test and entered the stage of large-scale industrialization. The first production line led by the Ministry of Construction and participating in the investment will be completed before the end of this year, and the products will enter the market for sales.
At present, the annual consumption of plywood in China exceeds 14 million cubic meters. The production of plywood not only consumes large amounts of logs, but also the use of wood, formaldehyde phenol or urea resin after hot pressing, free formaldehyde will slowly release over a long period of time, become a home Decoration is an important source of pollution. There have been many cases of illness or even death caused by formaldehyde poisoning in China. The development of plywood substitutes has become an important research field in the building materials industry.
In May last year, South China University of Technology's Polymer Structure and Modification Laboratory took the lead in putting forward the concept of “green†nanocomposite technology (NC technology) and combining bionics, green chemistry, and nanotechnology to create new structural materials and functions. Products. At present, the NC technology project of South China University of Technology has obtained 3 invention patents granted by the State Intellectual Property Office, and it is also the only project for the collection of nanomaterials in China.
Compared with plywood, NC board has extremely high environmental protection. The use of sand, stone, soil, agricultural and fishery and other wastes and renewable resources as the main raw materials, according to the different conditions of different places to change the ratio of raw materials to produce different types of products, such as concrete template mainly to chaff, wheat straw as raw material, adding A small amount of clay, soil, in order to reduce the brittleness of the clay, improve the impact strength of the product, with waste tires, rubber, plastics, etc. to increase flexibility. Waste tires, rubber, plastics and other raw materials do not need to be degraded because they have strong thermoplastic properties, can be reprocessed, reshaped and recycled.
From the cost point of view, the raw materials used in the production of NC boards not only save a lot of natural wood, but also greatly reduce the cost of products, which is about 20% lower than the cost of plywood, and thus solves the long-term cost of chemical materials due to synthetic resins, and the price can not be compared with natural wood. The problem of competition.
From the performance point of view, the NC board has a specific gravity of 0.6-0.7 g/cm3, which is smaller than the plywood. When it is used as a template for concrete construction, the weight is lighter, and the burden on high-level operations is reduced, which is 5 to 6 times longer than that of plywood; ,No formaldehyde and other toxic gases pollution;High compressive strength,applicable to the container bottom plate,At present, this kind of plate must also be imported from South Korea;The sound absorption,sound insulation,and shock absorption are all greater than plywood,resistant to rain,suitable for sound insulation materials, Outdoor advertising, etc.; not moldy, insects do not bite, is the ideal material for food and beverage shelves. In addition, NC technology can further develop non-combustible products to replace solids, flooring, doors, baths and other sanitary ware, as well as vehicles, boats and other vehicles inside and outside the shell and interior decoration materials.
From the perspective of industrialization, the cost of NC board is reduced by about 20% compared with plywood, and the product has a larger market space and competitiveness in terms of price. A production line investment needs 5 million yuan, after the completion of an annual output of 2,000 tons (3000 cubic meters), the annual output value of up to 21 million to 30 million yuan, profits and taxes 5 million to 9 million, the economic benefits are considerable.
It is understood that the project has now completed the pilot test and entered the stage of large-scale industrialization. The first production line led by the Ministry of Construction and participating in the investment will be completed before the end of this year, and the products will enter the market for sales.
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