Hybrid Organic Inorganic Materials
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. Performance eletrocatalítica frente a nitrito de um filme híbrido de fosfomolibdato e sílica organomodificada
RESUMO Materiais híbridos orgânico-inorgânicos nanoestruturados são produzidos com a finalidade de desenvolver e/ou aprimorar uma propriedade de interesse. Uma forma de obtenção de materiais híbridos é através da imobilização de um componente inorgânico em uma rede de sílica organicamente modificada (ormosil). Neste trabalho, um polioxometalato
Matéria (Rio J.). Publicado em: 25/11/2019
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2. COMPARATIVE STUDY OF TiO2 AND ZnO APPLICATION IN HYBRID SOLAR CELLS USING COPOLYMER P3OT/P3MT
Hybrid inorganic-organic solar cells are an attractive alternative energy source because of their low-cost production and ability to make use of a large amount of solar radiation available. This work aims to evaluate different solar cells composed of TiO2 and ZnO with P3OT/P3MT copolymer. Layers of semiconductor oxides were deposited on transparent fluorine-
Quím. Nova. Publicado em: 02/05/2019
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3. PONTOS QUÂNTICOS AMBIENTALMENTE AMIGÁVEIS: DESTAQUE PARA O ÓXIDO DE ZINCO
Semiconductor nanocrystals with sizes in the quantum confinement regime (2-10 nm) present special physical and chemical properties. Additionally, environment-friendly quantum dots (QDs), as zinc oxide and zinc sulfide, offer many practical usages. Herein the ZnO semiconductor nanocrystals properties will be preferentially explored, such as its luminescence,
Quím. Nova. Publicado em: 2017-10
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4. Synthesis, characterization and cytotoxicity of Chitosan/Polyvinyl Alcohol/Bioactive Glass hybrid scaffolds obtained by lyophilization
ABSTRACT One of the important research topics in tissue engineering is the development of optimum three-dimensional scaffolds for regeneration and growth of bone tissue. The scaffold developed should promote an initial biomechanical support, provide the formation, deposition and organization of the new organic matrix generated, and degrade proportionally to
Matéria (Rio J.). Publicado em: 2016-12
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5. Electrochromic Properties of Polyaniline-Based Hybrid Organic/Inorganic Materials
Hybrid materials based on polyaniline (PAni) were obtained by in situ polymerization of aniline with chitosan and/or organically modified clay (nanomer I-24) in HCl. The samples were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and direct current (DC) electrical conductivity. Thi
J. Braz. Chem. Soc.. Publicado em: 2016-10
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6. Time domain NMR evaluation of poly(vinyl alcohol) xerogels
Abstract Poly(vinyl alcohol) (PVA)-based chemically cross-linked xerogels, both neat and loaded with nanoparticulate hydrophilic silica (SiO2), were obtained and characterized mainly through time domain NMR experiments (TD-NMR). Fourier-transform infrared (FT-IR) and wide angle X-ray diffraction (WAXD) analyses were employed as secondary methods. TD-NMR, thr
Polímeros. Publicado em: 08/08/2016
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7. Geopolymer/PEG Hybrid Materials Synthesis and Investigation of the Polymer Influence on Microstructure and Mechanical Behavior
Geopolymers are aluminosilicate inorganic polymers, obtained from the alkali activation of powders containing SiO2+Al2O3>80wt%, mainly proposed as environmentally friendly building materials. In this work, metakaolin-based geopolymers have been prepared and a water-soluble polymer, polyethylene glycol (PEG), has been added in different percentages to obtain
Mat. Res.. Publicado em: 25/08/2015
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8. Study on the adsorption of heavy metal ions from aqueous solution on modified SBA-15
Amino-functionalized SBA-15 mesoporous silica was prepared, characterized, and used as an adsorbent for heavy metal ions. The organic - inorganic hybrid material was obtained by a grafting procedure using SBA-15 silica with 3-aminopropyl-triethoxysilane and bis(2,4,4-trimethylpentyl) phosphinic acid (Cyanex 272), respectively. The structure and physicochemic
Mat. Res.. Publicado em: 05/04/2013
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9. Inorganic-organic hybrids based on poly (ε-Caprolactone) and silica oxide and characterization by relaxometry applying low-field NMR
Poly (ε-caprolactone) (PCL) based hybrids containing different amounts of modified (Aerosil® R972) and unmodified (Aerosil® A200) silica oxide were prepared employing the solution method, using chloroform. The relationships of the amount of nanofillers, organic coating, molecular structure and intermolecular interaction of the hybrid materials were invest
Mat. Res.. Publicado em: 25/09/2012
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10. Uso de silicatos modificados na remoção de corantes de efluentes aquosos
This thesis describes the preparation, characterization and application of new inorganic/organic hybrid materials, obtained from organo-functionalization of lamellar surface of derivatives of keniaíta, magadeíta and RUB-18 silicates. The products obtained were treated with silylating agents by different methods. The materials were characterized by FTIR for
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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11. Nanopartículas de dióxido de titânio como aditivos em materiais híbridos orgânico-inogânico fotocrômicos baseados em fosfotungstatos / Titanium dioxide nanoparticles as an additive for photochromic hybrid organic-inorganic materials based on phosphotungstate
Nesse estudo procurou-se avaliar o impacto do aditivo dióxido de titânio, mistura anatase-rutila, no comportamento fotocrômico de nanocompósitos baseados em materiais híbridos do tipo silicatos orgânicos (Ormosis) contendo ácido fosfotúngstico, \ H IND.3\ PW IND.12\ O IND.40\ . O material híbrido foi obtido via processo sol-gel tendo sido caracteriz
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/02/2011
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12. Síntese caracterização de materiais híbridos de poliamida-imida (PAI) e copolissilsesquioxanos de 3-aminopropiltrietoxissilano (APES) e feniltrietoxissilano (PTES) / Synthesis and characterization of hybrid organic-inorganic materials of polyamide-imide (PAI) and copolisilsesquioxanes of 3-aminopropyltriethoxisilane (APES) and phenyltriethoxysilane (PTES).
O polímero poliamida-imida (PAI) é amplamente utilizado em fios esmaltados para aplicações elétricas devido ao balanço de suas propriedades mecânicas, elétricas e térmicas. Este polímero pode ser melhorado pela adição de cargas inorgânicas em sua matriz, dentre elas os silsesquioxanos, formando híbridos orgânicos/inorgânicos. O presente traba
Publicado em: 2011