캡슐형 파라핀계 상변화 물질 재료에서 pH 의존성에 관한 실험적 연구

초록

This study investigates the synthesis of silica-encapsulated phase change materials (PCMs) using paraffin as the core and tetraethyl orthosilicate (TEOS) as the silica precursor through sol-gel synthesis at different pH levels (4, 7, and 10.5). The effect of pH on the morphology and encapsulation quality was analyzed using SEM and FTIR. Results show that at pH 10.5, a well-defined, globular silica structure forms, while lower pH levels yield irregular morphologies and less prominent silica structures. Encapsulation occurred at all pH levels, but full polycondensation of SiO2 was only achieved at pH 10.5, optimizing the encapsulation process for thermal energy storage.

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