Intercalation Matrices
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Intercalation of Apocarotenoids from Annatto (Bixa orellana L.) into Layered Double Hydroxides
Synthetic conditions were evaluated to intercalate norbixin into layered double hydroxides (LDH). Norbixin was isolated from a hydrosoluble commercial annatto extract. LDH samples comprising M2+/Al3+ (M = Mg, Zn) were synthesized by coprecipitation and characterized by X-ray diffraction, thermal analysis coupled to mass spectrometry, vibrational spectroscopi
J. Braz. Chem. Soc.. Publicado em: 2020-11
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2. Hybrid Materials Based on Bentonite Functionalized with Amine Groups via the Hydrolytic Sol-Gel Method
Bentonite is a natural clay that presents characteristics such as good capacity to exchange cations, large specific surface area, large porosity, and possibility to undergo intercalation and/or functionalization. This work reports on bentonite functionalization with organomodified alkoxides. Functionalization afforded hybrid materials displaying desirable pr
J. Braz. Chem. Soc.. Publicado em: 2016-05
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3. Mechanical and thermomechanical properties of polyamide 6/Brazilian organoclay nanocomposites
Abstract Polymer/clay nanocomposites are a new class of composites with polymer matrices where the disperse phase is a silicate with elementary particles that have at least one of dimensions in nanometer order. Polyamide 6/Brazilian organoclay nanocomposites were prepared by melt intercalation, and the mechanical, thermal and thermomechanical properties were
Polímeros. Publicado em: 15/03/2016
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4. Evaluation of impact strength of polyamide 6/bentonite clay nanocomposites
Nanocomposites of polymer/clay have had much attention in recent years, particularly those developed with layered silicates due to the need of engineering materials more efficient than pure polymers for certain applications. The level of exfoliation of layered silicates in crystalline structure of polymer matrices has been studied and has been observed that
Materials Research. Publicado em: 26/06/2012
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5. Nanocompósitos de PVC, argila organicamente modificada e óxidos metálicos : estudo do processo de preparação e propriedades de combustão e emissão de fumaça / PVC, organically modified montmorillonite and metallic oxides nanocomposites : evaluation of the preparation process and fire and smoke behavior
Poly(vinyl chloride) (PVC), copper (II), molybdenum and zinc oxides, and organically modified montmorillonite nanocomposites were prepared in a melt blending intercalation process. The morphology of the nanocomposites was evaluated using X-ray diffractometry (XRD) and transmission electron microscopy (TEM), and indirectly by the increment of the Young modulu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/08/2010
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6. Intercalação de íons lantanídeos e de poli(óxido de etileno) assistida por tensoativo na matriz hospedeira VOPO4.2H2O / Intercalation of ions Lanthanides and Poly (ethylene oxide) assisted by surfactant in host matrix of VOPO4.2H2O
Vanadium compounds are intensively studied due to their electrochemical, catalytic, magnetic and biological properties. In this work, our goal was to investigate the VOPO4.2H2O (vanadyl phosphate), which has a lamellar structure formed by VOPO4 sheets interconnected by weak interactions. Taking advantage of this structure, it is possible to synthesize severa
Publicado em: 2008
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7. Intercalação de aminas em fenilfosfonatos e fenilarsonato metalicos lamelares : um enfoque termoquimico
The isostructural lamellar compounds titanium phenylphosphonate (FFT), titanium phenylarsonate (FAT) and zirconium phenylphosphonate (FFZ) were synthesized and intercalated with alkylmonoamines (methyl- to heptylamines), alkyldiamines (diaminoethane and diaminobuthane) and aromatic amines (lutidine and a-picoline). They were characterized through ele mental
Publicado em: 2004
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8. Development of electrochemical interfaces based on poly(pyrrole) and lamellar vanadium pentoxide xerogel nanocomposites. / "Desenvolvimento de interfaces eletroquímicas à base de nanocompósitos de poli(Pirrol) e xerogel lamelar de pentóxido de vanádio"
Esta tese apresenta um estudo detalhado das propriedades eletroquímicas dos nanocompósitos de V2O5.nH2O e poli(pirrol) sobre a superfície de eletrodos. Demonstramos aqui que pelo controle de parâmetros de síntese é possível alterar a composição das interfaces eletroquímicas dos eletrodos modificados, fazendo com que o poli(pirrol) esteja por cima,
Publicado em: 2001
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9. Intercalation compounds involving inorganic layered structures
Two-dimensional inorganic networks can shown intracrystalline reactivity, i.e., simple ions, large species as Keggin ions, organic species, coordination compounds or organometallics can be incorporated in the interlayer region. The host-guest interaction usually causes changes in their chemical, catalytic, electronic and optical properties. The isolation of
Anais da Academia Brasileira de Ciências. Publicado em: 2000-03