Journal of the Korean Industrial and Engineering Chemistry, Vol.7, No.5, 823-831, October, 1996
연구논문-TEOS의 부분가수분해에 의한 실리카 졸의 합성과 유리섬유 제조
Preparation of Silica Sol by Partial Hydrolysis of TEOS and High Purity Silica Glass Fiber
초록
본 연구는 [H2O]/[TEOS]=1.7에서 산촉매를 첨가한 부분가수분해를 행하여 졸을 합성하였다. 최적의 방사성을 갖는 졸을 결정하기 위하여 부분가수분해에 의하뎌 합성된 졸을 trimethylsilylation하여 안정화시킨 후에 반응시간에 따르는 분자량과 점도의 변화를 관찰하였다. 최적조건하에서 제조된 졸용액에서 용매를 제거한 후 겔섬유를 제조하였고 이를 1,000℃에서 열처리하여 실리카섬유를 제조하였다. 제조된 섬유는 단면적이 원형이며 인장강도는 83±20kg/㎟이었고, 순도는 약 99.997%이었다.
At the ratio [H2O]/[TEOS] = 1.7, the silica sol was synthesized by partial hydrolysis in the presence of acid catalyst. After stabilizing the silica sol by trimethylsilylation, the molecular weight and viscosity of the sol obtained at various reaction times were examined to determine a best spinnability of the sol. Gel fibers were prepared from the sol solution after removing solvent in the solution, and the gel fibers were heated at 1,000℃. The prepared silica fibers were in the shape of circular cross-section and their tensile strength and SiO2 purity were 83 ± 20kg/㎟ and about 99.997%, respectively.
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