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• 영문명: Surface modification of silica aerogel by surfactant adsorption and heat treatment methods
• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: 김남이(Nam Yi Kim) 김성우(Seong Woo Kim)
• 간행물 정보: 『한국응용과학기술학회지』한국유화학회지 제27권 제3호, 282~289쪽, 전체 8쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2009.09.30

영문 초록

In preparation of silica aerogel-based hybrid coating materials, the combination of hydrophobic aerogel with organic polar binder material is shown to be very limited due to dissimilar surface property between two materials. Accordingly, the surface modification of the aerogel would be required to obtain compatibilized hybrid coating sols with homogeneous dispersion. In this study, the surface of silica aerogel particles was modified by using both surfactant adsorption and heat treatment methods. Four types of surfactants with different molecular weights and HLB values were used to examine the effect of chain length and hydrophilicity. The surface property of the modified aerogel was evaluated in terms of visible observation for aerogel dispersion in water, water contact angle measurement, and FT-IR analysis. In surface modification using surfactants, the effects of surfactant type and content, and mixing time as process parameter on the degree of hydrophilicity for the modified aerogel. In addition, the temperature condition in modification process via heat treatment was revealed to be significant factor to prepare aerogel with highly hydrophilic property.

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참고문헌

키워드

silica aerogel surface modification surfactant heat treatment