A5071198573- Polymer Nanocomposites and Properties
- Tribology and Wear Analysis
- Polymer crystallization and properties
- Biodiesel Production and Applications
- Lubricants and Their Additives
- 2D Materials and Applications
- Graphene research and applications
- Microplastics and Plastic Pollution
- Natural Fiber Reinforced Composites
- Advanced Nanomaterials in Catalysis
- Polymer Science and PVC
- Elasticity and Material Modeling
- Polymer Nanocomposite Synthesis and Irradiation
- Recycling and Waste Management Techniques
- Effects and risks of endocrine disrupting chemicals
- Nanoplatforms for cancer theranostics
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- MXene and MAX Phase Materials
Universidade Presbiteriana Mackenzie
2020-2023
Universidade Federal do ABC
2011-2021
Universidade de São Paulo
2018
Brazilian Center for Research in Energy and Materials
2018
Microwave devulcanization is known to be a promising and an efficient rubber recycling method which makes possible for the regain its fluidity, it capable of being remolded revulcanized.The focus this work understand physical chemical changes that occur in ground tire after different microwave exposure periods.For purpose chemical, thermal, rheological morphological analyses were performed on rubber, contains natural (NR) styrene-butadiene (SBR) as polymeric material.The results showed...
Lubricant friction modifier additives are used on lower-viscosity engine oils to mitigate the impact boundary friction. In this work, use of Graphene nanoplatelets, with an average 9 layers, was first investigated as additive a fully formulated SAE 0W-20 oil during reciprocating tribological tests at 40 and 120 °C Hertzian pressure up 1.2 GPa. Then, fuel consumption evaluated in vehicle emission test by adding 0.1% GNP, improved booster, onto 5W-20 oil. Adding GNP reduced 2.6% FTP-75 cycle...
Lubricant friction modifier additives are used on lower viscosity engine oils to mitigate boundary friction. This work presents the development of a graphene-based material as an oil additive, from formulation actual vehicle tests. The graphene was initially characterized using scanning electron microscopy (SEM) and Raman spectroscopy, which revealed predominance nanoplatelets (GNPs) with average nine layers. After functionalization, two GNP additive variants were mixed fully formulated SAE...
In this work, flower-like molybdenum disulfide (MoS2) microspheres were produced with polyethylene glycol (PEG) to form MoS2-PEG. Likewise, gold nanoparticles (AuNPs) added MoS2-PEG/Au investigate its potential application as a theranostic nanomaterial. These nanomaterials fully characterized by scanning electron microscopy (SEM), transmission (TEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS), Fourier-transformed infrared (FTIR), cyclic voltammetry and impedance spectroscopy....
For the first time, polystyrene (PS)/molybdenum disulfide (MoS2) nanocomposites were produced using melt compounding technique. The presented better thermo stability due to improvements in heat dissipation. Mechanical evaluations of showed that when only 0.002 wt% MoS2 was added PS, it possible achieve an improvement 27, 93.7, and 100% tensile strength, elongation at break, toughness, respectively. Thermo-mechanical results indicated strong intermolecular physical interactions between filler...
Many studies have been carried out in order to enable the use of recycled polymers food packaging. The main problem is presence residual contaminants plastic, because it could pose a risk public health when contact with food. Our purpose evaluate different types mechanical recycling decontaminate polypropylene. Firstly, pellets polypropylene were contaminated, following protocol recommended by FDA. subsequently recovered (washed and dried) samples submitted extrusion processes. In...
The full understanding of the mechanisms involved in development polymer blend microstructure during its processing has not yet been achieved; blends composed by a highly elastic dispersed phase is even more indefinite.The proposal this work to analyze deformation behavior new system partially devulcanized rubber polypropylene using 2D and 3D images, both as complementary tools.For purpose, ground tire (GTR) was microwave irradiation for different exposure periods.After step, each treated...
Lubricant friction modifier additives are used on lower-viscosity engine oils to mitigate the impact boundary friction. In this work, use of Graphene nanoplatelets, with an average 9 layers, was first investigated as additive a fully formulated SAE 0W-20 oil during reciprocating tribological tests at 40 and 120 °C Hertzian pressure up 1.2 GPa. Then, fuel consumption evaluated in vehicle emission test by adding 0.1% GNP, improved booster, onto 5W-20 oil. Adding GNP reduced 2.6% FTP-75 cycle...
Os resíduos sólidos urbanos (RSUs) são atualmente um dos maiores problemas ambientais, por serem gerados em grande quantidade e ocuparem extensos espaços longo período, resultando na diminuição do tempo de vida útil aterros sanitários. polímeros constituem percentual da composição RSUs, sendo que as embalagens plásticas contribuem com maior volume massa. Apesar reciclagem estarem se consolidando no Brasil, graças ao seu mercado ascendente promissor, existem ainda restrições quanto a sua...
Abstract In this work, we designed and studied two synthetic routes, based on modified Hummers method, to obtain graphene oxide (GO), investigated their influence the performance of polypropylene (PP)/GO nanocomposites. The routes differed in application condition oxidizing agent, potassium permanganate (KMnO 4 ), which was added either as a powder (GO‐P) or water solution (GO‐S). This apparently subtle change yielded GOs with different degrees oxidation particle sizes, where GO‐P presented...
Abstract This work aims to investigate the effect of adding vulcanized or partially devulcanized rubbers on recycled polypropylene (PPr), considering thermomechanical and morphological properties. The study proposes better understand how structural changes underwent by rubber (after devulcanization) contributed improving mechanical properties PPr. PPr/rubber blends were prepared a co‐rotating twin‐screw extruder then injected. composed most microwaves with refined microstructure showed...
Abstract In this work, polymer blend nanocomposites based on carbon fillers were produced via melt‐compounding in a twin‐screw extruder. A combination of several matrices (LLDPE, EMA, and LLDPE/EMA) (FLG, FWCNT, FLG/FWCNT) was used. Thermal enhancement as the consequence few‐walled nanotube addition, led to significant improvements initial degradation temperatures LLDPE (383.2 > 441.2°C), EMA (371.2 417.3°C), LLDPE/EMA (390.55 430.62°C) matrixes, respectively. The evaluation...