| 학회 |
한국화학공학회 |
| 학술대회 |
2002년 가을 (10/24 ~ 10/26, 서울대학교) |
| 권호 |
8권 2호, p.3833 |
| 발표분야 |
분체공학 |
| 제목 |
아세트산과 티타늄 이소프로폭시드의 반응 기구에 관한 연구 |
| 초록 |
FT-IR spectroscopy has been used to investigate the chemical modification reaction mechanism of titanium isopropoxide by acetic acid. Most of the ester obtained by a ‘transesterification’ reaction rather than a direct esterification reaction. Free isopropanol reacts with bridging acetate ligands mainly, and created isopropyl acetate ester and Ti-OH bond. The choice of the starting alkoxides allowed a change of the reactivity and the functionality of the new precursors toward hydrolysis. In the wave number range 1020 to 1100 cm-1, only one kind of absorption band at about 1052 cm-1 has been found in a mixture of titanium isopropoxide with acetic acid from FT-IR analysis, while two kinds of absorption band at about 1034 and 1083 cm-1, respectively, attributed to terminal and bridging alkoxy groups, have been found in a mixture of tetra titanium butoxide and acetic acid. This result implies that trimer and/or dimer including the terminal and bridging alkoxy group can be generated readily in these latter mixture. In addition, we could know that progressive esterification to form isopropyl acetate ester results in a gradually increasing level of condensation and (Ti-O-Ti) oxo-bridging with time. |
| 저자 |
황운연, 채의석, 김선기, 이정운, 박형상, 유승준, 윤호성, 김용렬
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| 소속 |
서강대 |
| 키워드 |
Sol-Gel process; titanium alkoxide; acetic acid; esterification
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| 원문파일 |
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