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Journal of the Korean Ceramic Society 1998;35(9): 958. |
| 유기물 첨가에 따른 다공성 실리카 세라믹스의 제조 및 특성(I) |
| 신진용, 이범재, 노재성 |
| 충남대학교 공과대학 정밀공업화학과 |
| Synthesis and Characteristics of Porous Silica Ceramics with Organic Additives(I) |
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| ABSTRACT |
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Porous silica ceramics were prepared using DCCA(Drying Control Chemical Additives) Such as uncharged polymer(Polyethylene glycol) and protein (Lipase) under H2O/Low-grade TEOS=10 C2H5OH/Low-grade TEOS=1 HC1/Low=grade TEOS=0.01 After Plain which doesn't added DCCA and samples of 11 sorts which varied molecular weight of PEG(Mw=600, 1000, 2000) quantity of Lipase and concentration of wat-er were synthesized gellation time and thermal analysis were investigated. After heat-treated at 600, cry-stal structures analyses of SiO2 polymer and characteristics of pores were investigated. Gellation time was retarded about 2-6 times as compared with plain resulting in addition of DCCA and crystal structures ex-hibited amorphous state. Moreover as increase of water a short gellation time was obtained. The samples added PEG showed increase of specific surface areas up to 20-40% and had micropores while those of Lipase were decreased about 90% and showed broad pore size distribution. |
| Key words:
DCCA, Polyethlene glycol(PEG), Lipase, Specific surface area, Pore size distribution |
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