Stearic acid modified tourmaline powder had been investigated to improve the compatibility and dispersed stability between tourmaline and polymer matrix. The experimental results indicated that the activation index was 100% and contact angle reached 120° when the ratio of the ore slurry is 5:50, the dosage of stearic acid and p-toluenesulfonic acid is 10% and 0.5% (of tourmaline powder’s quantity) respectively with reaction at 80°C for 6.0 h, and the modified tourmaline exhibited an excellent hydrophobic property. The introduction of stearic groups reduced the reunion of tourmaline particles clearly and improved the dispersivity in polymers, and the amount of negative ions released of modified tourmaline increased obviously for both modified tourmaline powders and its composite with polyamide-66 compared to the unmodified tourmaline. Moreover, the structure of modified tourmaline was also characterized by means of Fourier Transform infrared spectroscopy, X-ray diffraction, thermal gravimetric analysis, scanning electron microscope.
 Jiang, K., Sun, T.H., Sun, L.N. and Li, H.B. (2006) Adsorption Characteristics of Copper, Lead, Zinc and Cadmium Ions by Tourmaline. Journal of Environmental Sciences, 18, 1221-1225.
 Eduardo, G., Sergio, A., Christian, F.L., Paolo, C., Pietro, V., Valier, G. and Maarten, L. (2011) Mineralogical and Chemical Variability of Fluvial Sediments 2. Suspended-Load Silt (Ganga-Brahmaputra, Bangladesh). Earth and Planetary Science Letters, 302, 107-120.
 Ekosse, G.I.E. (2010) Kaolin Deposits and Occurrences in Africa: Geology, Mineralogy and Utilization. Applied Clay Science, 50, 212-236. http://dx.doi.org/10.1016/j.clay.2010.08.003
 Xu, H.Y., Prasad, M. and Liu, Y. (2009) Schorl: A Novel Catalyst in Mineral-Catalyzed Fenton-Like System for Dyeing Wastewater Discoloration. Journal of Hazardous Materials, 165, 1186-1192. http://dx.doi.org/10.1016/j.jhazmat.2008.10.108
 Liu, S.M., Li, D.C., Hu, W.T., Qin, G.Q. and Li, L.F. (2008) Ion-Beam Deposition of Tourmaline Film on Glass. Journal of Non-Crystalline Solids, 354, 1444-1446.
 Park, S.H. and Bandaru, P.R. (2010) Improved Mechanical Properties of Carbon Nanotube/Polymer Composites through the Use of Carboxyl-Epoxide Functional Group Linkages. Polymer, 51, 5071-5077. http://dx.doi.org/10.1016/j.polymer.2010.08.063
 Lvov, Y. and Abdullayev, E. (2013) Functional Polymer-Clay Nanotube Composites with Sustained Release of Chemical Agents. Progress Polymer Science, 38, 1690-1719.
 Zhang, J., Ju, S., Jiang, D. and Peng, H.X. (2013) Reducing Dispersity of Mechanical Properties of Carbon Fiber/ Epoxy Composites by Introducing Multi-Walled Carbon Nanotubes. Composites Part B, 54, 371-376. http://dx.doi.org/10.1016/j.compositesb.2013.05.046
 Bhui, D.K. and Misra, A. (2012) Synthesis of Worm Like Silver Nanoparticles in Methyl Cellulose Polymeric Matrix and Its Catalytic Activity. Carbohydrate Polymers, 89, 830-835.
 Harald, G.D. (2010) The “Chessboard” Classification Scheme of Mineral Deposits: Mineralogy and Geology from Aluminum to Zirconium. Earth-Science Reviews, 100, 1-420.
 Jana, S., Saikia, A., Purkait, M.K. and Mohanty, K. (2011) Chitosan Based Ceramic Ultrafiltration Membrane: Preparation, Characterization and Application to Remove Hg(II) and As(III) Using Polymer Enhanced Ultrafiltration. Chemical Engineering Journal, 170, 209-219.
 Groat, L.A., Giuliani, G., Marshall, D.D. and Turner, D. (2008) Emerald Deposits and Occurrences: A Review. Ore Geology Reviews, 34, 87-112.
 Liang, J.S., Wang, L.J., Xu, G.K., Meng, J.P. and Ding, Y. (2006) Far Infrared Radiation Property of Rare Earth Mineral Composite Materials. Journal of Rare Earths, 24, 281-283.
 Prasad, P.S.R. and Sarma, D.S. (2005) Study of Structural Disorder in Natural Tourmalines by Infrared Spectroscopy. Gondwana Research (Gondwana Newsletter Section), 8, 265-270.