Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 10, pp. 1465−1469.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © I.V. Loukhina, B.N. Dudkin, A.Yu. Bugaeva, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 10, pp. 1505−1510.
AND INDUSTRIAL INORGANIC CHEMISTRY
Synthesis of Organically modiﬁ ed Layered Magnesium Silicate
by the Sol-Gel Method
I. V. Loukhina, B. N. Dudkin, and A. Yu. Bugaeva
Institute of Chemistry, Komi Scientiﬁ c Center, Ural Branch, Russian Academy of Sciences,
Syktyvkar, Komi Republic, Russia
e-mail: firstname.lastname@example.org, email@example.com
Received June 25, 2013
Abstract—Organically modiﬁ ed layered magnesium silicate was for the ﬁ rst time synthesized by thermal treatment
of a sol of silicon dioxide, magnesium hydroxide, and hexadecyl trimethylammonium bromide, with reﬂ ux of the
liquid phase. The material obtained can be used as an ultradispersed component in polymer-inorganic composites.
The rapid advances in the modern materials
science has resulted in the development of materials
with prescribed properties, including polymeric
nanocomposites based on layered silicates . The
nanocomposites have a high mechanical strength and
heat resistance, lowered combustibility, and good
chemical stability, which makes them promising for use
in automotive, aerospace, and other industries [1–3].
The problem of compatibility of hydrophilic layered
silicates with hydrophobic polymeric matrices can
be solved by using organoclays (organically modiﬁ ed
clays) [3, 4]. Organically modiﬁ ed clays are used
as high-efﬁ ciency ﬁ llers in production of polymeric
nanocomposite materials, precursors for fabrication
of mesoporous materials, sorbents for puriﬁ cation of
water and soils, and components of drilling muds.
Te conventional way to obtain organoclays is by
intercalation of an organic component into the interlayer
space of a natural [5, 6] or synthetic silicate [7–9]. The
most frequently used organic modiﬁ ers are quaternary
ammonium compounds with hydrocarbon radicals of
varied structure and length [10–12].
The advantages of synthetic layered structures over
their natural analogs are in their purity, reproducible
characteristics, and possibility of controlling the
composition in the course of synthesis .
Template syntheses of organically modiﬁ ed
montmorillonites and hectorites have been described
in the literature [13, 14], but no reports of template
synthesis of organically modiﬁ ed talc are available.
The goal of the present study was to synthesize a
layered magnesium silicate with the composition and
structure of talc and an organically modiﬁ ed layered
magnesium silicate in the presence of quaternary
ammonium compounds (hexadecyl trimethylammonium
bromide) by thermal treatment with reﬂ uxed liquid
phase and to determine the role played by the organic
component when the structure of organically modiﬁ ed
layered magnesium silicate is formed.
As starting substances in all syntheses served
magnesium hydroxide freshly prepared by the method
described in  and a silicon dioxide sol produced
by ion exchange of sodium metasilicate on KU-2
ion-exchange resin. The particle sizes of the starting
substances were determined with a Malvern Zetasizer
system for characterization of nanoparticles. The
average particle sizes of magnesium hydroxide and
silicon dioxide sol were 1 μm and 39 nm, respectively.
The amounts of the reagents were calculated on the
basis of the empirical formula of talc, Mg
Molar ratios of the starting components: 1.0MgO :
(synthesis of magnesium silicate); 1.0MgO :
: xR, where R is hexadecyl trimethylammonium