Evaluation of Organic-Inorganic Hybrid Insulation Material Using Inorganic Filler and Polyurethane
무기질 충진재와 폴리우레탄을 활용한 유·무기 복합 단열소재의 특성 평가

Jong-Kyu Lee, Jung-Sub Soh, Hyun-Kyung Noh
2012 Korean Journal of Materials Research  
Recently, inorganic-organic hybrid materials have attracted much attention not only for their excellent thermal conductivity but also for their flame retardant properties. In this study, the properties of organic-inorganic hybrid insulating materials using inorganic fillers and polyurethane foam with different foaming conditions have been investigated. The addition of 1.5 wt% water to polyurethane as foaming agent shows the best foaming properties. The pore size was decreased in the foaming
more » ... in the foaming body with increasing of the CaCO 3 addition. The apparent density and thermal conductivity were increased by increasing the CaCO 3 addition. With an increasing amount of CaCO 3 powder, the flame retardant property is improved, but the properties of thermal conductivity and apparent density tend to decrease. When the addition of fine particles of CaCO 3 , the apparent density and thermal conductivity were increased and, also, with the addition of coarse particles over 45 µm in size, the apparent density and thermal conductivity were increased as well. In this study, the adding of CaCO 3 with average particle size of 27 µm led to the lowest thermal conductivity and apparent density. After evaluation with different inorganic fillers, Mg(OH) 2 showed the highest thermal conductivity; on the other hand, CaCO 3 showed the lowest thermal conductivity.
doi:10.3740/mrsk.2012.22.11.604 fatcat:ak242f6kffazbbuh7yaw6dxhoq