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Vol. 25 No. 10 (2013): Vol 25 Issue 10

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Study of Surface Modification of Ultra-Fine CaCO3 With Different Coupling Agent

https://doi.org/10.14233/ajchem.2013.OH19
Guojun Cheng
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, P.R. China
Xiuhua Yu
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, P.R. China
Guoxin Ding
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, P.R. China
Chuyang Xu
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, P.R. China

Corresponding Author(s) : Guojun Cheng

chengguojun0436@126.com

Asian Journal of Chemistry, Vol. 25 No. 10 (2013): Vol 25 Issue 10

Abstract

To compare the superficial capacity of ultra-fine calcium carbonate powder, the coupling agents of g-aminopropyl triethoxyl silane (KH550), g-methacryloxypropyl trimethoxy silane (KH-570), vinyltrimethoxy silane (SG-Si 171) and di(dioctylpyrophosphato)ethylene titanate (NDZ-311) were used as modifiers to modify its surface activity. The structural changes and properties of the unmodified and modified ultra-fine CaCO3 powder were characterized by Fourier transform infrared spectroscopy, contact angle measuring instrument (CAMI) and sedimentation stability experiment. The results showed that the coupling agent bonds covalently onto the surface of CaCO3 particles and forms an organic coating layer. Contact angle measuring instrument indicated that the coupling agent molecules were absorbed or anchored on the surface of CaCO3 particles, which facilitates to hinder the aggregation of CaCO3 particles.

Keywords

Ultra-fine CaCO3 Silane coupling agent Surface modification
Cheng, G., Yu, X., Ding, G., & Xu, C. (2013). Study of Surface Modification of Ultra-Fine CaCO3 With Different Coupling Agent. Asian Journal of Chemistry, 25(10), 5558–5560. https://doi.org/10.14233/ajchem.2013.OH19
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