서지주요정보
나노크기 Fumed Silica의 표면 개질 = Surface modification of nanosize fumed silica
서명 / 저자 나노크기 Fumed Silica의 표면 개질 = Surface modification of nanosize fumed silica / 송신애.
저자명 송신애 ; Song, Shin-Ae
단체명 생명화학공학과
발행사항 [대전 : 한국과학기술원, 2002].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8012955

소장위치/청구기호

학술문화관(문화관) 보존서고

MCBE 02007

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The surface modification of fumed silica was achieved by batch and continuous spray drying process. To quantify the hydrophobicity of modified silica particles, ethanol volume ratio on water and contact angle were measured. Fourier Transfer IR(FT-IR) and Thermogravimetric Analysis(TGA) were used to determine the degree of surface modification. Scanning Electron Microscopy(SEM) and Transmission Electron Microscopy(TEM) were used to study the morphology of modified silica particles. As the concentration of octyltriethoxysilane(OTES, Aldrich, 96%) increased, the degree of surface modification was also increased in the batch process. The modified silica particles were agglomerated severely. Ultrafine particles formed by the reaction of unreacted octyltriethoxysilane caused agglomeration of silica particles. To overcome the agglomeration of particles and increase hydrophobicity of silica, the surface of silica particles was modified by the continuous spray drying process. The modified silica particles in the continuous spray drying process showed improved hydrophobicity and morphology. Agglomeration of surface modified silica particles was reduced because unreacted octyltriethoxysilane inducing agglomeration of silica particles in the batch process was vaporized in the continuous spray drying process. The unreacted OTES was found to be completely removed according to the Thermogravimetric Analysis(TGA) and Fourier Transfer IR(FT-IR) measurement.

서지기타정보

서지기타정보
청구기호 {MCBE 02007
형태사항 vi, 54 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Shin-Ae Song
지도교수의 한글표기 : 박승빈
지도교수의 영문표기 : Seung-Bin Park
학과명칭변경 : 화학공학과가 생명화학공학과로 변경됨 (2002년부터)
학위논문 학위논문(석사) - 한국과학기술원 : 생명화학공학과,
서지주기 참고문헌 : p. 50-54
주제 표면 개질
나노크기
실리카
소수성
Fumed silica
Surface modification
hydrophobicity
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