Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of surface modifiers on the nano porous silica aerogels prepared by ambient drying process

상압건조 나노다공성 실리카 에어로젤에 대한 개질제 효과

  • Kim, Tae-Jung (Thin Film Materials Research Center, Korea Institute of Science and Technology) ;
  • Oh, Young-Jei (Thin Film Materials Research Center, Korea Institute of Science and Technology)
  • 김태정 (한국과학기술연구원 박막재료연구센터) ;
  • 오영제 (한국과학기술연구원 박막재료연구센터)
  • Published : 2007.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

Nanoporous silica aerogels with various surface modifiers were prepared by ambient drying process. Tetraethylorthosilicate (TEOS) were used a raw material. Ambient drying process for various surface modifier was studied in the point of view of a crack-free monolith and thin films and low cost. Various kinds of surface modifiers like as hexamethyldisilazane (HMDSZ), trimethlychlorosilane (TMCS), methlytriethoxylsilane (MTES), and methlytrimethoxysilane (MTMS) were studied in order to enhance hydrophobicity for the silica aerogel. Surface modified aerogels were evaluated by FT-IR, TG, BET, SEM and wetting angle measurement. Homogeneous and crack-free aerogels were obtained by modifying the HMDSZ and the TMCS. However silica xerogel was obtained when modified with MTMS, MTES.

Keywords

References

  1. A. R. Buzykaeb, A. F. Danilyuk, S. F. Ganzhur, E. A. Kravchenko, and A. P. Onuchin, 'Measurement of optical parameters of aerogel', Nuclear Instrum. Methods Phys. Res., vol. 433, pp. 396-400, 1999 https://doi.org/10.1016/S0168-9002(99)00325-3
  2. L. Kocon, F. Despetis, and J. Phalippou, 'Ultralow density silica aerogels by alcoho supercritical drying', J. Non-Cryst. Solids, vol. 220, pp. 96-100, 1998
  3. F. Schwertfeger, D. Frank, and M. Schmidt, 'Hydrophobic waterglass based aerogels without solvent exchange of supercritical drying', J. Non-Cryst. Solids, vol. 225, pp. 24-29, 1998 https://doi.org/10.1016/S0022-3093(98)00102-1
  4. 권영근, 최세영, 강신규, '실리카 에어로겔의 상압합성 및 특성연구(II)', 세라믹학회지, 제36권, 제11호, pp. 1189-1197, 1999
  5. 김태정, 남산, 오영제, '상압건조 뮬유리 에어로젤에 대한 표면개질제 영향', 센서학회지, 제15권, 제3호, pp. 173-178, 2006 https://doi.org/10.5369/JSST.2006.15.3.173
  6. L. W. Hrubesh, T. M. Tiloson, and J. F. Poco, 5th Conf Ultrastructure Processing, Orlando, Florida, Februrary pp. 17-21, 1991
  7. G. W. Scherer, In Sol-Gel Science and Technology, eds. M. A. Aegeter, M. Jaffelicci, Jr., D. F. Souza, and E. E. Zanotto, World Scientific, Singapore, pp. 181, 1988
  8. 류성욱, 김상식, 오영제, '상압건조 나노다공성 실리카 에어로젤에 대한 용매의 영향', 센서학회지, 제15권, 제5호, pp. 371-377, 2006 https://doi.org/10.5369/JSST.2006.15.5.371
  9. J. Fricke and A. Emmerling, 'Aerogels', J. Am. Ceram. Soc., vol. 75, no. 8, pp. 2027, 1992 https://doi.org/10.1111/j.1151-2916.1992.tb04461.x