Roger H. Bello
Universidade do Estado de Santa Catarina
FermentationExfoliated graphite nano-plateletsMiscibilityCuring (chemistry)KineticsCopolymerComposite materialEpoxyThermosetting polymerChemistryMaterials scienceBarium titanateEthanolEpoxy matrixMembraneChemical engineeringChromatographyPermeationCarbon nanotubeBiofuelPEG ratioPervaporationNanocomposite
14Publications
5H-index
80Citations
Publications 14
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#1Bruna Louise Silva (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
#2Marcia B. Schuster (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
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This work studies the effects of combining triblock copolymers with carbon nanoparticles (carbon nanotubes, graphene and carbon black) on curing kinetics. The chosen triblock copolymer was poly (propylene glycol)-block-poly (ethylene glycol)-block-poly (propylene glycol) (PPG-b-PEG-b-PPG), which has different contents of PEG in its structure. The main objective is to investigate the influence of the miscibility of the PPG-b-PEG-b-PPG copolymer in epoxy nanocomposites. The PEG fraction in the cop...
1 CitationsSource
#1Bruna Louise Silva (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
#2Marcia B. Schuster (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
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#1Juliana C. Frankowiak (UDESC: Universidade do Estado de Santa Catarina)
#2Roger H. Bello (UDESC: Universidade do Estado de Santa Catarina)H-Index: 5
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
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#1Roger H. Bello (UDESC: Universidade do Estado de Santa Catarina)H-Index: 5
#2Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
Abstract In this work the role of the addition of barium titanate (BaTiO 3 ) or multi-walled carbon nanotubes (MWCNT) on curing kinetics of the polyhexahydro-s-triazine (PHT) was investigated. The estimation of kinetic parameters triplet (activation energy, pre-exponential factor, and the reaction model) of PHT and its nanocomposites were made by isoconversional models. It is possible to state the conversion of the polyhemiaminal (PHA) into PHT polymer and all nanocomposites studied in this work...
2 CitationsSource
#1Roger H. Bello (UDESC: Universidade do Estado de Santa Catarina)H-Index: 5
#2Jacks P Priebe (UDESC: Universidade do Estado de Santa Catarina)H-Index: 1
Last. Luiz Af Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
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3 CitationsSource
#1Bruna Louise Silva (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
#2Roger H. Bello (UDESC: Universidade do Estado de Santa Catarina)H-Index: 5
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
view all 3 authors...
11 CitationsSource
#1Roger H. Bello (UDESC: Universidade do Estado de Santa Catarina)H-Index: 5
#2Luiz Af Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
Last. Daniela Becker (UDESC: Universidade do Estado de Santa Catarina)H-Index: 12
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The effects of the silanization of multi-walled carbon nanotubes and graphene nanoplatelets with 3-APTES on thermal, mechanical and electrical properties of epoxy nanocomposites were investigated. ...
7 CitationsSource
Abstract In this study it was used a numerical technique of successive approximations to estimate parameters of a conductivity model that includes the hopping process and the dipole relaxation for the purpose of describing the behavior of the conductivity measured on nanocomposites with carbon nanotubes in epoxy resin in the range of frequency of 100 Hz to 40 MHz. Two relaxation bands were detected, one with a response below 10 kHz and one above 10 MHz. For the first band, it was observed that t...
8 CitationsSource
#1Roger H. BelloH-Index: 5
A alteracao de propriedades termicas, mecânicas e eletricas de uma resina epoxidica apos a adicao de nanoparticulas alotropicas de carbono depende da concentracao, orientacao, tipo de particula, seu estado de dispersao e interacao destas com a matriz. A funcionalizacao quimica pode auxiliar na melhoria de ambos os problemas, com a incorporacao de grupos funcionais na superficie, paredes e pontas das nanoparticulas. Assim, a silanizacao tem sido usada em processos de funcionalizacao quimica dos n...