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Fabrication and characterization of Aerogel-Polydimethylsiloxane (PDMS) Insulation Film

Title
Fabrication and characterization of Aerogel-Polydimethylsiloxane (PDMS) Insulation Film
Author
노영아
Advisor(s)
김희택
Issue Date
2018-02
Publisher
한양대학교
Degree
Master
Abstract
The building has a large impact on the space heating demand and the indoor environment is affected by climate or daylight. Hence, silica aerogel has generally used as a film to reduce the coefficient of the window in the building. Silica aerogel is a suitable material to apply for insulation material with lower thermal conductivity than that of air to save interior energy. However expensive precursor and drying process were the main issue of the silica aerogel synthesis and practical usage. We attempt to fabricate aerogel insulation film for energy saving through the economic process under ambient pressure. Silica aerogel was synthesized from rice husk ash, which was an agricultural waste to be able to recycle. Taguchi design was used to optimize the parameters (amount of rice husk ash, pH, aging time) controlling the surface area of silica aerogel. The silica aerogel is prepared by sol-gel processing through acidic treatment and aging. The silica aerogel was obtained by modification of silica hydrogel surface and dry at ambient pressure. Finally, aerogel film was respectively fabricated by the different content of aerogel in polydimethylsiloxane (PDMS). Silica aerogel obtained 21 – 24nm average particle size was analyzed by SEM and silica aerogel with high surface area ( 832.26 m²/g ), pore size ( 3.30nm ) was characterized by BET. Then silica Aerogel – PDMS insulation film with thermal conductivity (0.002 W/mK) was analyzed by thermal wave system. The study demonstrates an eco-friendly and low-cost route toward silica – PDMS insulation film with low thermal conductivity (0.002 W/mK).
URI
http://www.dcollection.net/handler/hanyang/000000105230http://repository.hanyang.ac.kr/handle/20.500.11754/68610
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > ADVANCED MATERIALS ENGINEERING(첨단소재공학과) > Theses (Master)
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