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@Article{BaruelDutBalLopCas:2018:OrSiAr,
               author = "Baruel, Amanda F. and Dutra, Rita C. L. and Baldan, 
                         Maur{\'{\i}}cio Ribeiro and Lopes, Cristina M. A. and Cassu, 
                         Silvana N.",
          affiliation = "{Instituto Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and 
                         {Instituto Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and {Instituto 
                         Tecnol{\'o}gico da Aeron{\'a}utica (ITA)}",
                title = "Organofiliza{\c{c}}{\~a}o e silaniza{\c{c}}{\~a}o de argila 
                         bentonita",
              journal = "Qu{\'{\i}}mica Nova",
                 year = "2018",
               volume = "41",
               number = "2",
                pages = "134--139",
                month = "fev.",
             keywords = "organoclay, bentonite, silane, quaternary phosponium salt.",
             abstract = "Clays have been used in several technological areas. One of the 
                         most usual applications is their incorporation into organic 
                         materials. Nonetheless, natural clays are hydrophobic being 
                         incompatible with organic medium. Clay organophilization can be 
                         reached by several methods such as by exchange of the interlayer 
                         sodium cations by organic cations, and by silanization of the clay 
                         layers. In this study the bentonite clay was organophilized by the 
                         addition of the methoxymethyltriphenylphosphonium chloride (CTFF). 
                         Further, the organoclay was silanized with (3-glycidyloxypropyl) 
                         trimethoxysilane (GPTMS). X-ray fluorescence results, infrared and 
                         XPS spectroscopy showed the presence of phosphorus in the 
                         organophilic clay. The interlayer space, obtained by X-ray 
                         diffraction, increased in 55% after the CTFF addition showing the 
                         cationic exchange in the clay lamellar region. After the 
                         silanization of the organoclay the interlayer space was slightly 
                         reduced from 1,78 nm to 1,72 nm, indicating that the silane 
                         molecules were preferential bound in the clay edges.",
                  doi = "10.21577/0100-4042.20170160",
                  url = "http://dx.doi.org/10.21577/0100-4042.20170160",
                 issn = "0100-4042",
             language = "pt",
           targetfile = "baruel_organofilizacao.pdf",
        urlaccessdate = "04 dez. 2020"
}


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