Rheological Properties of Polysulfone-Sepiolite Nanocomposites
Polysulfone (PSU) is a specialty engineering polymer having various industrial applications. PSU is especially used in waste water treatment membranes due to its good mechanical properties, structural and chemical stability. But it is a hydrophobic material and therefore its surface aim to pollute easily. In order to resolve this problem and extend the properties of membrane, PSU surface is rendered hydrophilic by addition of the sepiolite nanofibers. Sepiolite is one of the natural clays, which is a hydrate magnesium silicate fiber, also one of the well known layered clays of the montmorillonites where has several unique channels and pores within. It has also moisture durability, strength and low price. Sepiolite channels give great capacity of absorption and good surface properties. In this study, nanocomposites of commercial PSU and Sepiolite were prepared by solvent mixing method. Different organic solvents and their mixtures were used. Rheological characteristics of PSU-Sepiolite solvent mixtures were analyzed, the solubility of nanocomposite content in those mixtures were studied.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1099330Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2723
 P. H. C. Camargo, K. G. Satyanarayana and F. Wypych, “Nanocomposites: Synthesis, Structure, Properties and New Application Opportunities,” Materials Research, vol. 12, no. 1, pp. 1-39, 2009.
 P. Anadão, L. F. Sato, H. Wiebeck, F. R. Valenzuela-Díaz, “Montmorillonite as a component of polysulfone nanocomposite membranes,” Applied Clay Science, vol. 48, pp. 127-132, March 2010.
 E. Thostenson, C. Li, and T. Chou, “Review Nanocomposites in Context,” Journal of Composites Science & Technology, vol. 65, pp. 491–516, 2005.
 M. Okamoto, “Recent advances in polymer/layered silicate nanocomposites: an overview from science to technology,” Material Science and Technology, vol.22, pp. 756-779, Manley, 2006.
 J. X. Guo, G. J. Zhang, W. Wu, S. L. Ji, Z. P. Qin, and Z. Z. Liu, “Dynamically formed inner skin hollow fiber polydimethylsiloxane/ polysulfonecomposite membrane for alcohol permselective pervaporation,” Chemical Engineering Journal, vol. 158, pp. 558-565, April 2010.
 T. Hanemann, D. V. Szabó, “Polymer-Nanoparticle composites: From synthesis to modern applications,” Materails, vol. 3, p.3468-3517, May 2010.
 D. Schmidt, D. Shah and E. P. Giannelis, “New Advances in Polymer/Layered Silicate Nanocomposites,” Current Opinion in Solid State and Materials Science, vol. 6, pp. 205–212, June 2012.
 S. R. Suprakas, Clay-Containing Polymer Nanocomposites: From Fundamentals to Real Applications, Elsevier, 2013, ch. 1-3.
 M. A. V. Rodriguez, J. D. L. Gonzalez, and M. A. B. Munoz, “Acid Activation of a Spanish Sepiolite: Physicochemical Characterization, Free Silica Content and Surface Area of Products Obtained,” Clay Minerals, vol. 29, pp. 361-367, 1994.
 A. Singer, “Palygorskite and sepiolite,” Soil Mineralogy with Environmental Applications, Soil Science Society of America, 2012, ch. 18.
 M. Z. Yunos, Z. Harun, H. Basri, A. F. Ismail, “Effects of Water as Non-Solvent Additive on Performance of Polysulfone Ultrafiltration Membrane,” Advanced Materials Research, vol. 448, pp. 46-50, April 2012.
 G. J. Summers, M. P. Ndawuni, C. A. Summers, “Chemical modification of poly-sulfone: anionic synthesis of dipyridyl functionalized polysulfone,” Polymer, vol. 42, pp.397–402, May 2001.
 H. L. Richards, P. G. L. Baker, E. Iwuoha, “Metal Nanoparticle Modified Polysulfone Membranes for Use in Wastewater Treatment: A Critical Review,” Journal of Surface Engineered Materials and Advanced Technology, vol. 2, pp. 183-193, June 2012.
 H. Eslami, M. Grmela, and M. Buismina, “Linear and nonlinear rheology of polymer/layered silicate nanocomposites,” Inc. J. Rheol. vol. 54, pp. 539-562, May 2010.
 S. R. Suprakas, “Rheoloy of polymer/layered silicate nanocomposites,” J. Ind. Eng. Chem., vol. 12, pp.811-842, Nov. 2006.
 J. U. Park, J. L. Kim, D. H. Kim, K. H. Ahn and S. J. Lee, “Rheological behavior of polymer/layered Silicate nanocomposites under uniaxial extensional flow,” Macromolecular Research, vol. 14, pp. 318-323, March 2006.