Investigation of the modification process of natural sedimentary calcite by organosilicon compounds
DOI:
https://doi.org/10.15587/2312-8372.2017.111246Keywords:
filler-film former system, sedimentary calcite, mechanochemical activation by organosilicon compoundsAbstract
The object of this research is the process of natural sedimentary calcite modification. The main problems that are solved in this research are the choice of the most suitable low molecular weight modifier among potassium methylsiliconate, sodium methylsiliconate and polymethylhydride siloxane, as well as the selection of optimal grinding regimes for the raw mineral.
It is found that during the mechanochemical activation in the presence of organosilicon modifiers, hydrophilicity coefficient of the surface of the sedimentary chalk is significantly reduced. The most effective modifier for the surface of sedimentary calcite is polymethylhydride siloxane. It is established that in the presence of modifiers, grinding and amorphization of carbonate raw materials are activated, which is confirmed by a decrease in the intensity of calcite reflections to 9 % in the case of the use of polymethylhydride siloxane and by 5–7 % in the case of methyl siliconates. It is shown that the modification of the sedimentary chalk surface leads to a decrease in the capacity of its adsorption layer by 20 % of the capacity of the processed material. The strength of the coagulation structure in the filler-film former system also decreases: the yield point of the system with untreated material is 20 % higher than this limit for the system where chalk is modified with polymethylhydride siloxane.
Despite the advantages of the proposed technical improvement, it is likely that the use of traditional fatty acid-based materials will remain more attractive in continuous production. Since this method has advantages from the point of view of the absence of the need to change the existing composites formulations, and from the point of view of minimizing the cost price. Research results will be more interesting in those industries where improving the properties of the material plays a decisive role.
References
- Mihajlovic, S., Sekulic, Z, Dakovic, A., Vucinic, D., Jovanovic, V., Stojanovic, J. (2009). Surface properties of natural calcite filler treated with stearic acid. Ceramics – Silikaty, 53 (4), 268–275.
- Diedel, R., Dorr, H., Geiß, P. L., Presser, M., Roth, E., Wittwer, W. (2010). Identification and modification of the surface properties of calcite fillers as a basis for new, highly filled adhesives. Geotechnologien Science Report, 16, 96–110.
- Deshmukh, G. S., Pathak, S. U., Peshwe, D. R., Ekhe, J. D. (2010). Effect of uncoated calcium carbonate and stearic acid coated calcium carbonate on mechanical, thermal and structural properties of poly(butylene terephthalate) (PBT)/calcium carbonate composites. Bulletin of Materials Science, 33 (3), 277–284. doi:10.1007/s12034-010-0043-7
- Mihajlovic, S. R., Vucinic, D. R., Sekulic, Z. T., Milicevic, S. Z., Kolonja, B. M. (2013). Mechanism of stearic acid adsorption to calcite. Powder Technology, 245, 208–216. doi:10.1016/j.powtec.2013.04.041
- Zhang, J., Guo, J., Li, T., Li, X. (2010). Chemical Surface Modification of Calcium Carbonate Particles by Maleic Anhydride Grafting Polyethylene Wax. International Journal of Green Nanotechnology: Physics and Chemistry, 1 (2), 65–71. doi:10.1080/19430871003684341
- Zhiyuan, Y., Yanjun, T., Junhua, Z. (2013). Surface modification of CaCO3 nanoparticles with silane coupling agent for improvement of the interfacial compatibility with styrene-butadiene rubber (SBR) latex. Chalcogenide Letters, 10 (4), 131–141.
- Nakatsuka, T., Kawasaki, H., Itadani, K., Yamashita, S. (1979). Functional silane-modified calcium carbonate. Journal of Applied Polymer Science, 24 (9), 1985–1995. doi:10.1002/app.1979.070240906
- Ding, H., Lu, S., Deng, Y., Du, G. (2007). Mechano-activated surface modification of calcium carbonate in wet stirred mill and its properties. Transactions of Nonferrous Metals Society of China, 17 (5), 1100–1104. doi:10.1016/s1003-6326(07)60232-5
- Cao, Z., Daly, M., Clemence, L., Geever, L. M., Major, I., Higginbotham, C. L., Devine, D. M. (2016). Chemical surface modification of calcium carbonate particles with stearic acid using different treating methods. Applied Surface Science, 378, 320–329. doi:10.1016/j.apsusc.2016.03.205
- Gutman, E. M. (1994). Mechanochemistry of Solid Surfaces. Singapore: World Scientific Publishing Company, 332. doi:10.1142/9789814354066_fmatter
- Cui, Z.-G., Binks, B. P., Clint, J. H. (2005). Determination of Contact Angles on Microporous Particles Using the Thin-Layer Wicking Technique. Langmuir, 21 (18), 8319–8325. doi:10.1021/la0510578
- Blagojevic, S. L., Kovacevic, V., Leskovac, M., Vrsaljko, D., Volovsek, V., Nover, C. (2004). Silane pre-treatment of calcium carbonate nanofillers for polyurethane composites. e-Polymers, 4 (1), 14. doi:10.1515/epoly.2004.4.1.384
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2017 Denis Baklan, Dmytro Arshynnikov, Valentin Sviderskiy, Oleksiy Myronyuk
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
