Project's information
| Project's title | Research and development of coatings with solar heat-reflective ability, waterproof performance, and high weather durability for application in civil and military constructions |
| Project’s code | TĐVLTT.03/21-23 |
| Research hosting institution | Institute for Tropical Technology |
| Project leader’s name | Dr. Nguyen Thien Vuong |
| Project duration | 01/01/2021 - 31/12/2023 |
| Project’s budget | 8,000 million |
| Classify | Grade B |
| Goal and objectives of the project | - Successful fabrication of advanced multifunctional coatings with solar heat reflection, waterproofing, and weather durability. |
| Main results | - Theoretical results: * Successfully developed a high weather-resistant exterior wall paint system with heat reflection properties for construction applications on wall surfaces and reinforced concrete based on acrylic emulsion resin and micro and nano-sized inorganic heat-reflective particles: + Determined the components and the ratio of SiO2 nanoparticles in the alkali-resistant primer. With a SiO2 nanoparticle content of about 2.5% (by weight), the alkali resistance of the primer film was enhanced. + Determined the components and the ratios of the components of the topcoat. The results of the study on the influence of micro and nano-sized inorganic heat-reflective additives (hollow microspheres, TiO2, BaSO4, ZrO2, CaSiO3) on UV-Vis-NIR reflectance showed that nano-TiO2 is the highest heat-reflective additive; the suitable content of nano-TiO2 in the paint film is 2%. At this concentration, a paint film with a thickness of 60 µm has an average reflectance in the λ = 700-1400 nm range of about 90-91%. + The nano TiO2 particles produced by HP1 have potential applications as heat-reflective additives for solar heat-reflective paint systems with high heat reflectance and cooling effects. + Determined the appropriate tinting color content for the solar heat-reflective paint film. The yellow AXX tint can achieve a high reflectance of over 80%, while other tinting colors can be added to the heat-reflective paint at a weight ratio of 10-20% (compared to the white paint weight) and still achieve a reflectance of over 80%. + JThe high weather-resistant, heat-reflective exterior wall paint system can reduce the surface temperature of concrete by approximately 9.5°C with white color and 7-8°C with other colors, and reduce the air temperature in the simulated test chamber by about 4.5°C with white color and 3-3.7°C with other colors compared to the test chamber not covered with paint. * Successfully developed a high weather-resistant, waterproof roof paint system with heat reflection properties (including primer and topcoat) for construction applications on wall surfaces and reinforced concrete based on water-based polyurethane resin and micro and nano-sized inorganic heat-reflective particles. The research results showed that the paint film has good waterproofing properties. A paint film with a thickness of 60 µm has an average reflectance in the λ = 700-1400 nm range of about 90-91%, capable of reducing the surface temperature by 9.12°C and the air temperature in the test chamber by 4.21°C compared to the test chamber not covered with paint. * Successfully developed a high weather-resistant, corrosion-protective, organic solvent-based paint system with heat reflection properties (including primer and topcoat) with inorganic heat-reflective particle additives: + Determined the impact of nanocarrier@Ce3+ particles on the properties and corrosion resistance of the epoxy resin-based primer film. The results showed that the paint film containing 1.5% modified SiO2 particles carrying Ce3+ has good properties and the highest corrosion resistance. After 30 days of immersion in NaCl solution, the impedance of the paint film remained high at 2.108 Ω.cm2. + Determined the composition of the topcoat based on polyurethane resin. A paint film with a thickness of 60 µm has a reflectance in the λ = 700-1400 nm range of 90.16%. + The high weather-resistant, corrosion-protective, organic solvent-based paint system with heat reflection properties can reduce the surface temperature by up to 19.31°C and the air temperature in the test chamber by 15.75°C. * Determined the weather resistance of the paint films through accelerated weathering tests. The test results showed that after 1560 hours of accelerated weathering, FE-SEM analysis showed that although the surface of the paint film was eroded forming micro grooves, these defects could not be observed with the naked eye. The paint film containing nanoparticles chalked at grade 2. Reflectance decreased slightly by about 2%. Color reduced heat reflectance and cooling efficiency but slightly increased weather resistance. The addition of TiO2 and SiO2 nanoparticles to the coating formulation significantly enhanced their properties, including reflectance, cooling insulation efficiency, and weather resistance. - Applied results: + Sucessully manufacture the three paint systems including solar reflective paint for architectual construction, solar-reflective waterproof paint and solar-reflective paint for steel structure. The products have undergone testing and practical application, covering an exterior building surface area of 1200 m2, roof surface of 200 m2 and a petroleum tank surface area of 1400 m2. The technology has demonstrated an effective reduction in the exterior building surface temperature by more than 9°C and the tank surface temperature by 9-19°C. Encouraged by the positive impact of the project product, several petroleum units have expressed their agreement to adopt the project's products, encompassing an area exceeding 3,600 m2. |
| Novelty and actuality and scientific meaningfulness of the results | - Utilize TiO2 nanoparticles as an additive in paint films with an optimal content of 2%. At this concentration, a paint film measuring 60 µm in thickness exhibits an average reflectivity in the wavelength range of λ = 700-1400 nm, reaching approximately 90-91%. The paint film, enriched with 2% nano-TiO2, demonstrates excellent cooling and heat resistance. |
| Products of the project | - Scientific papers in referred journals (list): |
| Research region | The products of project was applied at: + Petrovietnam Oil Cai Lan Joint Stock Company PVOIL + Luxsen International Paint Development Join Stock Company + Warehouse 101, Department of Logistics, Ministry of Defense |
| Recommendations | The principal investigator would like to suggest that the Vietnam Academy of Science and Technology pay attention to developing this research direction and support us in continuing research, refining technology, conducting test production, and gradually commercializing products for practical applications. |
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