Design and Optimization of a New Composite Thermal Insulating Fluorocarbon Coating

Abstract

Abstract. Based on the mechanism of thermal insulation, a new composite fluorocarbon thermal insulation coating (FTIC) was prepared with three different fillers of closed pore perlite, hollow glass microsphere and nano-antimony tin oxide (ATO) powder, in order to get the best thermal insulation performance, the formula of the composite FTIC was optimized by varying three independent parameters (the content of closed pore perlite, hollow glass microsphere and nano-ATO powder) and using a central composite design under response surface methodology. The test results show that, the temperature difference for the optimized FTIC system is 8.8°C, which is much the same to the value of 9.0°C predicated by response surface methodology model. IntroductionConsidering thermal insulation coating is one of the effective ways to improve building insulation properties and to reduce the energy consumption on air conditioning, we have done much in this area [1][2][3][4][5][6][7]; however, most researches focus on single or just two insulation mechanisms of thermal insulation combined together. In fact, the heat transfer of building is a result of combined action including obstruction, radiation and reflection. As a result, excellent thermal insulation coatings that can be used on building are still lacking in China. So, the multiple models and synergistic mechanism of thermal insulation coating system should be further studied in order to get excellent thermal insulation coatings.To meet the national needs for energy saving and emission reduction, this paper prepared a new fluorocarbon thermal insulation coating (FTIC) based on polyvinylidene fluoride emulsion. Using the principle of a central composite design under response surface methodology, this study has considered the content of three different functional fillers as the factors that could be related to thermal insulation performance of FTIC. Based on these, a new composite FTIC with multiple thermal insulation mechanism including obstruction, reflection and radiation was prepared. And the formulation of the composite FTIC was optimized by response surface methodology experiment.