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Effect of Hydraulic Activity on Crystallization of Precipitated Calcium Carbonate (PCC) for Eco-Friendly Paper
Department of Systems Innovation, Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo Bunkyo–ku 113-8656 Tokyo, Japan
Korea Institute of Geoscience and Mineral Resources (KIGAM), 92 Gwahang-no, Yuseong-gu, Daejeon 305-350, Korea
Department of Material Science and Engineering, College of Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
* Author to whom correspondence should be addressed.
Received: 29 October 2009; in revised form: 8 November 2009 / Accepted: 11 November 2009 / Published: 11 November 2009
Abstract: Wt% of aragonite, a CaCO3 polymorph, increased with higher hydraulic activity (°C) of limestone in precipitated calcium carbonate (PCC) from the lime-soda process (Ca(OH)2-NaOH-Na2CO3). Only calcite, the most stable polymorph, was crystallized at hydraulic activity under 10 °C, whereas aragonite also started to crystallize over 10 °C. The crystallization of PCC is more dependent on the hydraulic activity of limestone than CaO content, a factor commonly used to classify limestone ores according to quality. The results could be effectively applied to the determination of polymorphs in synthetic PCC for eco-friendly paper manufacture.
Keywords: hydraulic activity; precipitated calcium carbonate (PCC); crystallization; calcite; aragonite; limestone; eco-friendly paper
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Kim, J.-A.; Han, G.-C.; Lim, M.; You, K.-S.; Ryu, M.; Ahn, J.-W.; Fujita, T.; Kim, H. Effect of Hydraulic Activity on Crystallization of Precipitated Calcium Carbonate (PCC) for Eco-Friendly Paper. Int. J. Mol. Sci. 2009, 10, 4954-4962.
Kim J-A, Han G-C, Lim M, You K-S, Ryu M, Ahn J-W, Fujita T, Kim H. Effect of Hydraulic Activity on Crystallization of Precipitated Calcium Carbonate (PCC) for Eco-Friendly Paper. International Journal of Molecular Sciences. 2009; 10(11):4954-4962.
Kim, Jung-Ah; Han, Gi-Chun; Lim, Mihee; You, Kwang-Suk; Ryu, Miyoung; Ahn, Ji-Whan; Fujita, Toyohisa; Kim, Hwan. 2009. "Effect of Hydraulic Activity on Crystallization of Precipitated Calcium Carbonate (PCC) for Eco-Friendly Paper." Int. J. Mol. Sci. 10, no. 11: 4954-4962.