Liquid Films
Mostrando 1-12 de 70 artigos, teses e dissertações.
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1. Evaluation of Carbon Nanotubes/Polyaniline Thin Films for Development of Electrochemical Sensors
Thin films of multiwalled carbon nanotubes/polyaniline nanocomposites (CNT/PAni) were synthesized through the liquid/liquid (L/L) interfacial route, deposited over glass substrates, and evaluated through cyclic voltammetry and amperometry as electrochemical sensor, using L-ascorbic acid as probe. Films with three different CNT/PAni ratios have been prepared.
J. Braz. Chem. Soc.. Publicado em: 2020-06
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2. Película biodegradable de almidón de maíz termoplástico y quitosano con actividad antimicrobiana empleada como envase activo
ABSTRACT One of the research lines related to active packaging takes into account the incorporation of antimicrobial agents such as chitosan, a polysaccharide derived from the crustaceans’ exoskeleton. However, because of chitosan high molar mass, its diffusion from the package to the food surface is restricted, so the use of oligomers is an interesting bu
Matéria (Rio J.). Publicado em: 19/07/2018
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3. Surface Modification of Aluminized Cu-10Fe Alloy by High Current Pulsed Electron Beam
A Cu-10Fe alloy with magnetron sputtered Al films was irradiated by high current pulsed electron beam (HCPEB) with various pulse numbers, next changes of its microstructure and corrosion property were investigated. Compared with the initial sample, microhardness and corrosion resistance of the aluminized Cu-10Fe alloys after the HCPEB treatment are remarkabl
Mat. Res.. Publicado em: 24/11/2016
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4. NANOPARTÍCULAS DE Au EM LÍQUIDO IÔNICO SUPORTADAS EM FILMES BIOPOLIMÉRICOS: UMA AULA PRÁTICA PARA INVESTIGAÇÃO DA ATIVIDADE ANTIMICROBIANA
The synthesis of Au nanoparticles (NPs) in ionic liquid (IL) supported on biopolymers films applied in the investigation of antimicrobial activity was introduced as a new experimental practice for undergraduates in the nanotechnology discipline at the Department of chemistry, at University Federal of Rio Grande- FURG. The Au NPs were synthesized by reduction
Quím. Nova. Publicado em: 2016-09
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5. Self-Organization in Ionic Liquids: From Bulk to Interfaces and Films
In this contribution we present an overview on the relation between the complex structure of ionic liquids (ILs) and its impact in the field of surface science. The results herein described result mainly from modeling and simulation work carried out at Centro de Química Estrutural, Universidade de Lisboa, complemented in some cases by experimental results o
J. Braz. Chem. Soc.. Publicado em: 2016-02
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6. CÉLULAS SOLARES SENSIBILIZADAS POR CORANTES NATURAIS: UM EXPERIMENTO INTRODUTÓRIO SOBRE ENERGIA RENOVÁVEL PARA ALUNOS DE GRADUAÇÃO
An interesting practical experiment about the preparation of dye–sensitized solar cells (DSSC) using natural dyes were carried out by the undergraduate students in the chemistry course at UNICAMP . Natural dyes were extracted from blueberries (Vaccinium myrtillus L.), jabuticabas (Myrciaria cauliflora), raw and cooked beets (Beta vulgaris L.), and annattos
Quím. Nova. Publicado em: 2015-12
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7. Synthesis and Characterization of Methylcellulose Produced from Bacterial Cellulose under Heterogeneous Condition
In this work, methylcellulose (MC) was produced from bacterial cellulose (BC), using dimethyl sulfate in a 3 h (MC3h) or 5 h (MC5h) reaction under heterogeneous conditions, with reagent substitution at each hour. MC3h showed a degree of substitution (DS) of 2.26 ± 0.13 and MC5h showed a DS of 2.33 ± 0.05. The two samples were characterized by Fourier trans
J. Braz. Chem. Soc.. Publicado em: 2015-09
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8. Sensor químico baseado em microponte de impedância = : Chemical sensor based on impedance microbridge / Chemical sensor based on impedance microbridge
A integração de sistemas microeletrônicos em lab-on-a-chip está sendo cada vez mais necessária para concretizar novas aplicações dentro do emergente campo da microfluídica. Tanto na química quanto na bioquímica e até mesmo na medicina e bioengenharia, a microfluídica evolui conquistando um espaço crescente. Entretanto, desafios tecnológicos res
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/07/2012
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9. Aplicação da técnica de elipsometria de emissão para caracterização de materiais luminescentes
In this work we demonstrated the potential of the emission ellipsometry in the scope of the Stokes theory for electromagnetic field to the photophysics study of luminescent materials, in addition we introduce a new methodology using an achromatic quarter-wave plate. Moreover, the use of linearly polarized light allowed "selectively" the study of various phot
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/02/2012
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10. Polipropileno clarificado recoberto com filme de carbono amorfo hidrogenado pelo processo PECVD / Clarified polypropylene coated with hydrogenated amorphous carbon film by PECVD process
This work aimed to study the feasibility of application of clarified polypropylene (cPP) coated with hydrogenated amorphous carbon films (a-C:H) deposited by Plasma Enhanced Chemical Vapour Deposition (PECVD) in food packaging, mainly targeting the segment of bottles for carbonated beverages. For the deposition of films of a-C:H using different deposition pa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/10/2011
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11. Estudo das propriedades estruturais, mecânicas e ópticas de filmes elastoméricos. / Study of structural, mechanical and optical properties of films elastomeric.
Este trabalho visa o estudo de elastômeros de uretano/uréia (PU/PBDO) e elastômeros de acetoxipropilcelulose (APC). No caso dos elastômeros de PU/PBDO, sintetizamos filmes com e sem a presença de grãos magnéticos orientados ou não na matriz elastomérica. Após o processo de síntese, algumas amostras de PU/PBDO com e sem as nanopartículas foram exp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/03/2011
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12. Mechanical and tribological properties of Ti-containing carbon nanocomposite coatings deposited on TiAlV alloys
Ti-doped carbon coatings were deposited on TiAlV alloys by reactive dc-magnetron sputtering in Ar/CH4 mixed gas. When Ar flow increases the incorporation of Ti into films raises while the concentration of C decreases. The formed nanometric TiC crystals were more noticeable for coatings deposited with higher Ar flows. Hardness (H) and elastic modulus (E) of c
Materials Research. Publicado em: 2010-12