@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 = "27 abr. 2024"
}