Influence of binder viscosity on the control of infrared emissivity in low emissivity coating |
| |
| Institution: | 1. Functional Materials Laboratory School of Materials & Mineral Resources Xi’ an University of Architecture and Technology, Xi’an 710055, PR China;2. School of Applied Physics Materials Wuyi University, Jiangmen 529020, PR China;1. School of Physics and Electronics, Central South University, Changsha 410083, China;2. School of Materials Science and Energy Engineering, Foshan University, Foshan 528000, China;3. Hunan Province Engineering Technology Research Center in Novel Chip Inductance and Advanced Manufacturing Equipment, Huaihua 419600, China;1. Norwegian University of Science and Technology (NTNU), Department of Civil and Transport Engineering, NO-7491 Trondheim, Norway;2. SINTEF Building and Infrastructure, Department of Materials and Structures, NO-7465 Trondheim, Norway;3. Norwegian University of Science and Technology (NTNU), Department of Architectural Design, History and Technology, NO-7491 Trondheim, Norway |
| |
| Abstract: | Low emissivity is the complex system and polymer binder is one of the most important factors that affect optical and mechanical properties of the coating. Low infrared emissivity coatings were prepared by using flake aluminum particles and three types of polymer resins as fillers and binders, respectively. The influence of polymer binder viscosity on pigment particles distribution, surface morphology and infrared emissivity of the coating was systematically investigated. The results indicate that infrared emissivity of the coating can be strongly affected by the resin viscosity at the same preparation condition, which induces different aluminum particles distribution and surface morphology of the coating. Low resin viscosity is helpful for aggregating pigments and reducing the top polymer layer thickness near the surface, thus the infrared emissivity is reduced. If the resin viscosity value is decreased by two orders of magnitude, the infrared emissivity values would be reduced as much as 0.2. Additionally, a theoretical model is proposed to account for this mechanism, which indicates that sedimentation, evaporation and diffusion play important roles in forming different aluminum particles distribution during the drying process of the coating. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
