Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/89380
Type: Artigo de periódico
Title: Odtma+ And Hdtma+ Organo-montmorillonites Characterization: New Insight By Waxs, Saxs And Surface Charge
Author: Bianchi A.E.
Fernandez M.
Pantanetti M.
Vina R.
Torriani I.
Sanchez R.M.T.
Punte G.
Abstract: In this work we investigate the microstructure and properties of organo-montmorillonites (OMts) synthesized by intercalation of a Patagonian Mt with different surfactant/CEC ratios (0.5, 1 and 2) of octadecyl trimethylammonium (ODTMA+) and hexadecyl trimethylammonium (HDTMA+) cations. X-ray diffraction (XRD) patterns showed that in all OMt samples d001 value increases with respect to raw Mt (1.258nm). Small angle and wide angle X-ray scattering (SAXS and WAXS) curves, particle apparent diameters (determined by laser), zeta potential values and scanning electron microscopy (SEM) images, showed the presence of assorted d001 values (which depend on storage conditions), aggregate formation and charge reversal (which varied with loading and cation length) for samples obtained with 1 and 2 CEC. However, for samples intercalated with 0.5 CEC, we found evidence of smaller aggregate formation, no charge reversal, and similar d001 and zeta potential values (both higher than those of Mt). Findings reported here will help attain better conditions to functionalize highly charged Mt making them suitable to be used as nanocomposite precursors for different applications. © 2013 Elsevier B.V.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/j.clay.2013.08.032
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-84885033547&partnerID=40&md5=667b100e667eeecea81c6f9eaf8f4c03
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-84885033547.pdf706.97 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.