Project's information

Project's title Application of SiO2 nanoparticles for preparation of solar heat reflective waterborne coating system.
Project’s code VAST03.04/18-19
Research hosting institution Institute for Tropical Technology
Project leader’s name Nguyen Thien Vuong
Job Title, The rank of a Professor, Academic degree Dr.
Project duration 01/01/2018 - 31/12/2019
Project’s budget 600 million VND
Classify Excellent
Goal and objectives of the project

Finding on suitable constituents and technical conditions for fabricating water-borne paint system based on acrylic emulsion polymer and SiO2 nanoparticles, having reflective solar heat ability.
Main results
- Theoretical results:
  • The influence of SiO2 nanoparticles on heat reflective property of coatings based on acrylic resin emulsion was determined: The SiO2 nanoparticles fabricated from rice husk ash had spherical shape with a size of 200-400 nm and enhanced the heat reflective property, whilst the SiO2 nanoparticles ordered from Arosil (Belgium) and Sigma Aldrich had small size around 10-20 nm and decreased the reflectivity of the coatings. The coatings containing rice husk ash SiO2 with thickness of 120 nm had an average reflectivity of 90.2% within the wavelength range  = 750-1400 nm, could decrease the temperature of concrete surface 9.1 oC and the temperature of test chamber 6.9 oC.
  • The SiO2 nanoparticles had ability to enhance the weathering resistance of the coatings. The heat reflective coatings containing rice husk ash-SiO2 nanoparticles had weathering resistance of over 1200 h.
- Applied results:
Fabricated 2000 kg of paint and applied it to resist heat for 4500 m2 roof of Alexandre Yesin school at Ngoc Thuy, Long Bien, Hanoi.
Novelty and actuality and scientific meaningfulness of the results

Selected appropriate ratio of SiO2 nanoparticles for the fabrication of water paint having solar reflective function over 90%. This paint film could decrease the temperature of concrete surface 9.1 oC and the temperature of test chamber 6.9 oC.
Products of the project

- Scientific papers in referred journals (list):
+ Article(s) in qualified ISI-covered Journals:
1) Thien Vuong Nguyen, Phi Hung Dao, Tuan Anh Nguyen, Viet Hung Dang, Minh Nguyet Ha, Thi Thuy Trang Nguyen, Quoc Trung Vu, Thu Ha Hoang, Tran Chien Dang, Phuong Nguyen –Tri, Dai Lam Tran, Le Trong Lu, Photocatalytic degradation and heat reflectance recovery of water-borne acrylic polymer/ZnO nanocomposite coating, Journal of Applied Polymer Science (2020) e49116; DOI: 10.1002/app.49116.
2) The Tam Le, Thien Vuong Nguyen, Tuan Anh Nguyen, Thi Thanh Huong Nguyen, Thai Hoang, Dai Lam Tran, Duc Anh Dinh, Thi Mai Nguyen, Le Trong Lu, Thermal, mechanical and antibacterial properties of water-based acrylic polymer/SiO2-Ag nanocomposite coating, Journal of Materials Chemistry and Physics 232 (2019)  362-366.
3) Thien Vuong Nguyen, Xuan Hien Le, Phi Hung Dao, Christian Deckerc, Phuong Nguyen-Tri. Stability of acrylic polyurethane coatings under accelerated aging tests and natural outdoor exposure: The critical role of the used photo-stabilizers. Progress in Organic Coatings 124 (2018) 137–146.
+ Article(s) in National Scientific Journals:
1) Dao Phi Hung, Nguyen Thien Vuong, Dang Manh Hieu, Nguyen Thi Linh, Trinh Van Thanh, Mac Van Phuc, Nguyen Anh Hiep, Duong Manh Tien. Effect of silica nanoparticles on properties of coatings based on acrylic emulsion resin, Vietnam Journal of Science and Technology, 56 (3B) (2018), 117-125.
Research area Alexandre Yesin School, Ngoc Thuy, Long Bien, Hanoi.
Recommendations

We are looking forward to continuously recieving financial supports in order to implement a pilot production project of solar heat-reflective coating systems.