Development Status Quo of Green Environmental Protection Coatings
[Abstract] Introduce the green functional coatings that meet the requirements of environmental protection, combine the development trend of functional coatings, expound the current status of new green environmental protection functional coatings such as antibacterial, fireproof and antifouling, and look forward to the future development prospects of new environmentally friendly functional coatings.
[Key words] green; coating; progress [CLC number] TQ63 [document identification code] A [Article ID] 1003-5095 (2010) 06-0046-02
With the convening of the Copenhagen World Climate Conference, people realized that the problem of environmental pollution has affected the entire planet and that it has survived all humankind. Green environmental protection is the evaluation of the “health, environmental protection and safety†properties of coatings, including the sub-item evaluation and comprehensive evaluation of production raw materials, production process, construction process, use process and waste disposal [1]. The current requirements for green paints are mainly reflected in two aspects: on the one hand, reducing the total amount of volatile organic compounds in the paint production process and reducing the environmental harm caused by volatilization; on the other hand, the total amount of organic matter is reduced at the same time. To control the toxicity of organic matter, to avoid the poisoning of relevant personnel during production, construction and long-term use.
1 Development Status of Green Coatings 1.1 Thermal Insulation Coatings In recent years, thermal insulation coatings have been rapidly developed in order to achieve good heat insulation and temperature reduction in buildings and installations, while reducing energy consumption and reducing carbon dioxide emissions. The principle of heat insulation is mainly barrier, reflection and radiation type. In practical applications, most of them are reflection and radiation type.
Reflective thermal insulation coatings mainly reflect the sunlight through a high-reflectance coating to achieve thermal insulation. The choice of materials can be varied, and can be resin, metal or metal oxide. The selection of heat-insulating filler material is very important for heat insulation effect. Generally, the less visible light and near-infrared light absorption, the better. At the same time, there are certain requirements for the coating thickness, such as the use of aqueous silicone resin, sericite and hollow The coating prepared by microbeads has an optimal thickness of 500 μm [2]. Radiant thermal insulation coating is a heat-radiating coating that radiates the absorbed heat to achieve thermal insulation. Radiant thermal insulation coatings are characterized by the ability to cool down at the same rate in both the inner and outer layers of the coating. Therefore, the study of radiation-based paint has a positive significance. At present, the choice of radiation type materials mainly focuses on series of metal oxides with high infrared emissivity, such as Fe2O3, MnO2 [3].
1.2 Antibacterial Coatings In the environmental protection function coatings, antibacterial coatings have attracted more and more attention. At present, the preparation of antibacterial coatings is mainly achieved by adding antibacterial agents to the coatings. Antibacterial agents can choose natural antibacterial agents, organic antibacterial agents and inorganic antibacterial agents. Natural antibacterial agents are safe, non-toxic, and convenient, but their poor stability, short life, and narrow range of use make them very limited in use. The use of organic antibacterial agents is effective, the synthesis preparation is simple, the variety is wide, and the range is wide. However, it is easy to produce drug resistance and easily causes toxic side effects to the human body. Therefore, its use has limitations. Inorganic antibacterial agents perform better than the former in all aspects and are therefore used in large quantities in industrial production. Experiments have shown that the metal ions in the inorganic antibacterial agent are eluted from the antibacterial agent and can make the protein in the organism degenerate, thereby simply realizing the antibacterial effect, such as Ag+, Zn+, Cu+, etc., which are commonly used now. The main component of the inorganic antibacterial agent is a metal oxide, and a chemical reaction occurs between the active substance produced by the oxide under irradiation of light, especially ultraviolet light, and a sterilization effect is produced between the microorganism and the microorganism. It is TiO2 and ZnO.
[Key words] green; coating; progress [CLC number] TQ63 [document identification code] A [Article ID] 1003-5095 (2010) 06-0046-02
With the convening of the Copenhagen World Climate Conference, people realized that the problem of environmental pollution has affected the entire planet and that it has survived all humankind. Green environmental protection is the evaluation of the “health, environmental protection and safety†properties of coatings, including the sub-item evaluation and comprehensive evaluation of production raw materials, production process, construction process, use process and waste disposal [1]. The current requirements for green paints are mainly reflected in two aspects: on the one hand, reducing the total amount of volatile organic compounds in the paint production process and reducing the environmental harm caused by volatilization; on the other hand, the total amount of organic matter is reduced at the same time. To control the toxicity of organic matter, to avoid the poisoning of relevant personnel during production, construction and long-term use.
1 Development Status of Green Coatings 1.1 Thermal Insulation Coatings In recent years, thermal insulation coatings have been rapidly developed in order to achieve good heat insulation and temperature reduction in buildings and installations, while reducing energy consumption and reducing carbon dioxide emissions. The principle of heat insulation is mainly barrier, reflection and radiation type. In practical applications, most of them are reflection and radiation type.
Reflective thermal insulation coatings mainly reflect the sunlight through a high-reflectance coating to achieve thermal insulation. The choice of materials can be varied, and can be resin, metal or metal oxide. The selection of heat-insulating filler material is very important for heat insulation effect. Generally, the less visible light and near-infrared light absorption, the better. At the same time, there are certain requirements for the coating thickness, such as the use of aqueous silicone resin, sericite and hollow The coating prepared by microbeads has an optimal thickness of 500 μm [2]. Radiant thermal insulation coating is a heat-radiating coating that radiates the absorbed heat to achieve thermal insulation. Radiant thermal insulation coatings are characterized by the ability to cool down at the same rate in both the inner and outer layers of the coating. Therefore, the study of radiation-based paint has a positive significance. At present, the choice of radiation type materials mainly focuses on series of metal oxides with high infrared emissivity, such as Fe2O3, MnO2 [3].
1.2 Antibacterial Coatings In the environmental protection function coatings, antibacterial coatings have attracted more and more attention. At present, the preparation of antibacterial coatings is mainly achieved by adding antibacterial agents to the coatings. Antibacterial agents can choose natural antibacterial agents, organic antibacterial agents and inorganic antibacterial agents. Natural antibacterial agents are safe, non-toxic, and convenient, but their poor stability, short life, and narrow range of use make them very limited in use. The use of organic antibacterial agents is effective, the synthesis preparation is simple, the variety is wide, and the range is wide. However, it is easy to produce drug resistance and easily causes toxic side effects to the human body. Therefore, its use has limitations. Inorganic antibacterial agents perform better than the former in all aspects and are therefore used in large quantities in industrial production. Experiments have shown that the metal ions in the inorganic antibacterial agent are eluted from the antibacterial agent and can make the protein in the organism degenerate, thereby simply realizing the antibacterial effect, such as Ag+, Zn+, Cu+, etc., which are commonly used now. The main component of the inorganic antibacterial agent is a metal oxide, and a chemical reaction occurs between the active substance produced by the oxide under irradiation of light, especially ultraviolet light, and a sterilization effect is produced between the microorganism and the microorganism. It is TiO2 and ZnO.
Entry Doors,Modern Front Door,Double Front Doors,Exterior Sliding Doors
Foshan QI'AN Fireproof Shutter Doors Co., Ltd , https://www.qianfiredoors.com