Surface modification of anhydrous borax powders with stearic acid via mechanical dry powder coating

Yıl 2019, , 7 - 15, 16.03.2019

Süleyman Akpınar , Zeyni Arsoy , R. Sena Şenol

https://doi.org/10.30728/boron.414410

Öz

Surface modification of anhydrous borax powders with
stearic acid in the laboratory-scale planetary ball mill via mechanical dry
powder coating approach was investigated.
The alteration of hydrophilic surface properties of anhydrous borax with stearic
acid was optimized by modifier amount and activation time. The cohesion
mechanisms of powders, which processed at conditions of 0.5, 1 and 2 wt. % stearic
acid amount with the function of 30, 60 and 120 minute activation time, were
evaluated in terms of the solubility test, contact angle measurements, particle
size distributions, and scanning electron
microscopy (SEM) analysis. Results indicate that anhydrous borax surface could
be switched from hydrophilic to hydrophobic with changing contact angle from
wetting (17^o) to non-wetting (99^o). Water-insoluble amount of anhydrous borax powders, as a coating
efficiency indicator, was increased from 73 % to 91 % by coating with 1 wt. % stearic
acid for 60 min. Furthermore, SEM analysis results demonstrate that stearic
acid was discretely coated over the anhydrous
borax surface. As a conclusion, an effective mechanical dry coating processing
by a one-step coating approach could be
applied to obtain a modified anhydrous
borax surface, which offers controlled solubility behaviour in water-based
suspensions. 

Anahtar Kelimeler

Anhydrous borax, Stearic acid, Surface modification, Dry Coating

Kaynakça

• [1] McMillian P. W., Glass-Ceramics, 2nd Edition, Academic Press, New York, 1979.
• [2] Kingery W. D., Bowen H. K., Uhlmann, D. R., Introduction to Ceramics, John Wiley and Sons, New York, 1976.
• [3] Hawthorne F. C., Burns P. C., Grice J. D., The crystal chemistry of boron. In Boron Mineralogy, Petrology and Geology (E. S. Grew and L. M. Anevitz, Eds.), Mineral Society American, MSA Reviews in Mineralogy, 33 (2), 41-116, 1996.
• [4] Helvaci C. Borates, in Encyclopedia of Geology, (Selley R.C., Cocks, L.R.M and Plimer, I.R., eds.), Elsevier, (3), 510-522, 2005.
• [5] Kirk-Othmer, Encyclopedia of Chemical Technology, Ch.4, 5th Edition, 241-294, 2004.
• [6] Akpinar S., Yazici Z.O., Can M.F., Investigation of surface-modified anhydrous borax utilisation in raw glazes, Ceram. Int 44, 18344–18351, 2018.
• [7] ECETOC Technical Report No. 63, Reproductive and General Toxicology of Some Inorganic Borates and Risks Assessment for Human Beings, European Centre for Ecotoxicology and Toxicology of Chemicals (ECETOC), Brussels, Belgium, 3, 1995.
• [8] Kaplan J., Zamek J., A substitute for gerstley borate, Ceramics Technical, 32, 24-29, 2011.
• [9] Otles M. S., Modification of surface properties of biopowders by dry particle coating, Ph.D. Thesis, Université de Toulouse, National Institute of Posts and Telecommunications, Rabat, 2008.
• [10] Pfeffer R., Dave R. N., Dongguang W., Ramlakhan M., Synthesis of engineered particulates with tailored properties using dry particle coating, Powder Technol., 117, pp.40-67, 2001.
• [11] Yoshihara I., Pieper W., Hybridization–technology for surface modification of powders without binders, Swiss Pharma 6, 21, 1999.
• [12] Ouabbas Y., Chamayou A., Galet L., Baron M., Thomas G., Grosseau P., Guilhot B., Surface modification of silica particles by dry coating: Characterization and powder ageing, Powder Technol., 190a, 200-209, 2009.
• [13] Lefebvre G., Galet L., Chamayou A., Dry coating of talc particles: Effect of material and process modifications on their wettability and dispersibility, AIChE Journal, 57 (1), 79-86, 2011.
• [14] Sonoda R., Horibe M., Oshima T., Iwasaki T., Watano S., Improvement of dissolution property of poorly water-soluble drug by novel dry coating method using planetary ball mill, Chem. Pharm. Bull. 56 (9),1243-7, 2008.
• [15] Tsai W. T., Microstructural characterization of calcite-based powder materials prepared by planetary ball milling, Materials, 6, 3361-3372, 2013.
• [16] Suryanarayana C., Mechanical alloying and milling, Prog. Mater Sci., 46, 1–184, 2001.
• [17] Baláž P., Mechanochemistry in Nanoscience and Minerals Engineering, Chapter 2, High Energy Milling, Springer, Hardcover, Netherland, 2008.
• [18] Hersey J. A., Ordered mixing: A new concept in powder mixing practice, Powder Technology, 11 (1) 41-44, 1975.
• [19] Dahmash J., Dry particle coating-a unique solution for pharmaceutical formulation, Pharmaceutical Technology, 42 (3) 26-30, 2018.
• [20] Gilbert M., Petiraksakul P., Mathieson I., Characterization of stearate-stearic acid coated fillers, Mater. Sci. Technol., (17), 1472–1478, 2001.
• [21] Jeong S. B., Yang, Y. C., Chae Y.B., Kim B. G., Characteristics of the treated ground calcium carbonate powder with stearic acid using the dry process coating system, Mater. Trans., 50 (2), 409–414, 2009.
• [22] Mihajlovic S. R., Vucinic D. R., Sekulic Z. T., Milicevic S. Z., Kolonja B. M., Mechanism of stearic acid adsorption to calcite, Powder Technol., 245, 208–216, 2013.
• [23] Gilbert M., Sutherland I., Guest A., Characterization of coated particulate fillers, J. Mater. Sci., 35, 391–397, 2000.
• [24] Griffin M., The Structure and Biological Functions of Lipids, Bio Factsheets, 3, 2000.
• [25] Markley K. S., Fatly Acids: Their chemistry and physical properties, Part 1, 2nd ed., Interscience Publishers Inc., New York. 1960. [26] Agernäs O., Tengberg T., Development of two methods to evaluate lubricating greases using a rheometer, B.Sc. Thesis in Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden, 2011.
• [27] Hashmi S., Effect of surface roughness on wetting properties, in Comprehensive Materials Finishing, 285, 2017.
• [28] Kanimozhi D., Ratha Bai V., Analysis of bioactive components of ethanolic extract of coriandrum sativum L., IJRPS 2012, 2 (3),97-110, 2012.
• [29] Jeong S. B., Yang Y. C., Chae Y. B., Kim B. G., Characteristics of the treated ground calcium carbonate powder with stearic acid using the dry process coating system, Mater. Trans., (50–2), 409 - 414, 2009.
• [30] Liao J., Du G., Qiao X., Hao D., Surface modification of diatomite by stearic acid and its effects on reinforcing for natural rubber/styrene-butadiene rubber blend. J. Chin. Ceram Soc., (39), 641-645, 2011 . [31] Wang Y., Lee W. C., Characterization and treatment of calcium carbonate: A comparative study, Polym. Compos., (24), 119–131, 2003.
• [32] Wang B. B., Feng J. T., Zhao Y. P., Yu T. X., Fabrication of novel superhydrophobic surfaces and water droplet bouncing behavior, J. Adhes. Sci. Technol., 24, 2693-2705, 2010.