Synthesis and characterization of resorcinol-formaldehyde organic aerogel
SCIE
SCOPUS
- Title
- Synthesis and characterization of resorcinol-formaldehyde organic aerogel
- Authors
- Kim, SY; Yeo, DH; Lim, JW; Yoo, KP; Lee, KH; Kim, HY
- Date Issued
- 2001-02
- Publisher
- SOC CHEMICAL ENG JAPAN
- Abstract
- In aqueous solutions containing basic catalysts, a wet gel was synthesized through the sol-gel process of resorcinol (R) and formaldehyde (F), The formation of RF gel is dependent on the ratio of R and catalyst (C), density of solid fraction, and temperature. The gelation proceeded quickly with low R/C ratio, high density, and high temperature. The RF organic aerogel was obtained from the wet gel by low-temperature supercritical solvent drying with carbon dioxide. The RF aerogel product shows extremely low thermal conductivity and highly specific surface area due to its ultra-porous structure. The thermal conductivity is closely related to the pore size distribution of the aerogel, The aerogel in the solid fraction ranges of near 3% (0.06 g/cm(3)) and the R/C ratio of 300 retains the lowest thermal conductivity.
- Keywords
- RF aerogel; supercritical drying; thermal conductivity; N-2 adsorption; THERMAL-CONDUCTIVITY; SILICA AEROGELS; CARBON AEROGELS; LOW-DENSITY; POLYCONDENSATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19660
- DOI
- 10.1252/jcej.34.216
- ISSN
- 0021-9592
- Article Type
- Article
- Citation
- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, vol. 34, no. 2, page. 216 - 220, 2001-02
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