Author(s)

Rui Shen ¹, Ping He ¹, Sorachon Yoriya ², Naichao Chen ¹, Jiang Wu ¹

Affiliation(s)

¹ College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
² National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand

Corresponding Author

Ping He

ABSTRACT

Cenospheres are widely used in industry because of their unique properties such as low density, low thermal conductivity, good thermal stability and impact resistance. This paper focuses on the effect of fly ash cenospheres on the thermal insulation performance of coatings in coal-fired power plants. Using polyacrylic acid as the substrate, the effect of particle size and filling amount of fly ash cenospheres on the thermal insulation performance of thermal insulation coatings was investigated. The results show that the smaller the particle size of fly ash cenospheres, the more significant the effect on the thermal insulation performance of the coatings; at the same time, within a certain reasonable range, increasing the filling amount of fly ash cenospheres can effectively improve the thermal insulation effect of the coatings. We100-200 fly ash cenospheres were selected and their filling amount in the coatings was adjusted to 30% to prepare carbon-coated fly ash cenospheres, and composite heat-insulating coatings were prepared to study the effect of carbon-coated fly ash cenospheres on the composite heat-insulating coatings. The carbon coated fly ash cenospheres showed advantages in enhancing the thermal insulation performance of the coatings. Through the thermal conductivity test and thermal insulation performance experiments, the modification strategy effectively reduces the thermal conductivity of the material by introducing a layer of carbon with high thermal resistance on the surface of fly ash cenospheres, and the reduction of thermal conductivity is about 20.4%, which achieves the optimization of the thermal insulation effect.

KEYWORDS

Cenospheres, fly ash, thermal insulation coatings, surface modification

CITE THIS PAPER

Rui Shen, Ping He, Sorachon Yoriya, Naichao Chen, Jiang Wu, Study on the effect of using carbon coated fly ash cenospheres on the performance of thermal insulation coatings. Journal of Materials, Processing and Design (2024) Vol. 8: 46-57. DOI: http://dx.doi.org/10.23977/jmpd.2024.080205.

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