다공성 구조 제어를 통한 실리카 에어로겔/PDMS 복합체의 단열 특성 향상

Abstract

In this study, hierarchical porous polymer composite were developed using the silica-aerogel (SA) impregnation method, which forms nano-scale pores, and solvent evaporation induced phase separation (EIPS) method, which forms micro-scale pores. Specifically, the micro-scale pore structure formed through EIPS is determined by its rheological properties, meaning that it is dictated by the solvent’s evaporation temperature. It was confirmed that the micro-scale pores form stably at 65 ℃ , and based on this condition, additional SA impregnation was carried out to fabricate the thermal insulation composite materials. These composite materials were found to possess thermal conductivity of less than 80% compared to neat PDMS, suggesting their potential use as insulation materials for future-mobility applications.