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J. Korean Ceram. Soc. > Volume 39(11); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(11): 1090.
doi: https://doi.org/10.4191/kcers.2002.39.11.1090
벤토나이트 유동성 개질제의 제조 및 특성
이석기, 구광모, 양경수1, 박성우2, 이병교2
경일대학교 공업화학과
1경북대학교 고분자공학과
2경북대학교 무기재료공학과
Preparation and Characterization of Bentonite Rheology Modifiers
Suk-Kee Lee, Kwang-Mo Koo, Kyung-Su Yang1, Sung-Woo Park2, Byung-Kyo Lee2
Department of Industrial Chemistry, Kyungil University
1Department of Polymer Science, Kyungpook National University
2Department of Inorganic Materials Engineering, Kyungpook National University
Six different composition of water-swellable bentonite rheology modifiers(WSB-1~WSB-6) were prepared by the compounding of peptizers and anionic surfactants as an additives with Bentonite(BEN) of montmorillonite group. Average particle size, particle morphology and water-swellability of WSB and the viscosity with additives were measured, respectively. And the rheological behavior of WSB were investigated using the rheometer. The viscosity of WSB-1 increased with decreasing both pH and average particle size of BEN, WSB-2 treated $Na_2CO_3$ as a peptizer showed the maximum viscosity. These results can be interpretated cause for rearrangment as the edge-to-face structure of BEN particles containing WSB. Also, WSB-4∼WSB-6 containing both peptizer and anionic surfactant was sol phase that their viscosity was not nearly with the shear rate, however, WSB-3 containing Tetrasodium Pyrophosphate(TSPP) as an anionic surfactant showed the thixotropy by the viscosity difference of 1000 times with the shear rate. From this result, the anions of TSPP can be explained to arrange in edge of BEN particles containing WSB-3.
Key words: Bentonite, Rheology modifier, Peptizer, Anionic surfactant, Thixotropy
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