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Sol-Gel법에 의해 제조된 실리카 졸의 방사성과 유변학적 특성
(Ⅱ)알코올 및 반응온도 효과
Spinnability and Rheological Properties of Silica Sols Prepared by the Sol-Gel Method - (Ⅱ) Effects of Alcohol and Reaction Temperature
HWAHAK KONGHAK, October 1997, 35(5), 627-632(6), NONE
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Abstract
Sol-Gel법에 의해 제조된 실리카 졸의 유변학적 특성을 출발용액 중의 알코올량 및 반응온도의 함수로써 조사하였다. 에탄올 함유량이 다르게 제조된 모든 용액에 있어서 10-400 P의 고점도 영역에서 방사성이 나타났고, 이때의 흐름곡선은 뉴톤유체 혹은 shear thinning의 거동을 보였다. 한편 반응온도의 상승은 방사가능한 점도영역에 도달하는데 걸리는 시간을 급격히 줄일 수 있었으나, 섬유의 인출가능한 시간을 짧게 했다.
The rheological properties of silica sols prepared from the Sol-Gel method have been investigated as a function of the alcohol contents of starting solution and reaction temperature. The spinnability of gel fibers appeared at a high viscosity range of 10-400P in all of the solutions prepared with different ethanol contents. The spinnable solutions showed Newtonian or shear thinning behaviors at the high viscosity range. The rise of the reaction temperature led to a remarkable shortening of the time needed for obtaining these spinnable solutions. But the time available for fiber drawing was shorter for the solutions with higher reaction temperatures.
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References
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Kamiya K, Sakka S, Mizutani M, Yogyo-Kyokai-Shi, 84, 614 (1976)
Sakka S, Mater. Res. Soc. Symp. Proc., 32, 91 (1984)
Song KC, Chung IJ, HWAHAK KONGHAK, 33(3), 292 (1995)
Sakka S, Kamiya K, J. Non-Cryst. Solids, 48, 31 (1982)
Song KC, Chung IJ, HWAHAK KONGHAK, 34(3), 389 (1996)
Yu P, Liu H, Wang Y, J. Non-Cryst. Solids, 52, 511 (1982)
Sakka S, Kamiya K, J. Non-Cryst. Solids, 48, 31 (1980)
Nogma M, Moriya Y, J. Non-Cryst. Solids, 37, 191 (1980)
Brinker CJ, Keefer KD, Schaefer DW, Assink RA, Kay BD, Ashley CS, J. Non-Cryst. Solids, 63, 45 (1984)
Kamiya K, Yoko T, Suzuki H, J. Non-Cryst. Solids, 93, 407 (1987)
