A5070078694- Conducting polymers and applications
- Plant-Derived Bioactive Compounds
- Electrospun Nanofibers in Biomedical Applications
- biodegradable polymer synthesis and properties
- Advanced Sensor and Energy Harvesting Materials
- Electrochemical sensors and biosensors
- Polydiacetylene-based materials and applications
- Analytical Chemistry and Sensors
- Microplastics and Plastic Pollution
- Supercapacitor Materials and Fabrication
- Polymer Nanocomposites and Properties
- Natural Fiber Reinforced Composites
- Nanocomposite Films for Food Packaging
- Plant biochemistry and biosynthesis
- Advanced Photocatalysis Techniques
- Collagen: Extraction and Characterization
- Electromagnetic wave absorption materials
- Adsorption and biosorption for pollutant removal
- Extraction and Separation Processes
- Academic Research in Diverse Fields
- Silicon Effects in Agriculture
- Chemistry Education and Research
- Cellular and Composite Structures
- Advanced NMR Techniques and Applications
- Biotechnology and Related Fields
Universidade Estadual Paulista (Unesp)
2011-2024
Universidade Federal de São Carlos
2024
Federal Institute of São Paulo
2024
Hospital Regional de Presidente Prudente
2024
Universidade de São Paulo
2019-2024
Faculdade de Tecnologia e Ciências
2014
Departamento de Ciência e Tecnologia
2014
ABSTRACT This article describes a new approach of recycling the leather waste (shavings) using it as filler in natural rubber foams composites. The were prepared different amounts (0–60 parts per hundred rubber) and submitted to morphological (SEM microscopy) mechanical analyses (cyclic stress–strain compression). increase shavings on composite causes an viscosity mixture, which reflects foaming process. results smaller fairly uniform cells. Furthermore, expanded has biggest cell size, with...
Leather tanning processes cause environmental impact as a result of the generation solid waste, wastewater, and release gases. The improper disposal such waste may promote oxidation chromium, for example, changing it from chromium (III) to (VI), in which becomes extremely toxic. In this study, composites were prepared natural rubber (NR) with industrial leather ( L w ), varying amount 20 80 phr, aim recycling waste. microstructure, mechanical properties rheological investigated. results...
ABSTRACT In this article, the results of process and fabrication ammonia gas sensors are obtained through production poly(vinyl alcohol) polyaniline (PVA/PANI) nanofibers in different concentrations deposited on interdigitated electrodes (IDEs) The showed good interaction between PVA PANI, as well solvents involved, with adhesion substrate, shown for morphological analysis by scanning electron microscopy (SEM). performance sensor was carried out direct current measurements. It has been...
Waste recycling has been the subject of numerous scientific researches regarding environmental care. This paper reports redirecting sugarcane bagasse ash (SBA) as new filler to natural rubber (NR/SBA). The NR/SBA composites were prepared using an opened cylinder mixer incorporate vulcanization agents and different proportions residue (SBA). contains about 70-90% inorganic compounds, with silica (SiO2) being main compound. SBA incorporation improved mechanical properties vulcanized rubber....
The present work shows study of the CO2 capture by amidines DBN and PMDBD using 13C solid-state NMR thermal techniques. solid state analyses demonstrate formation a single PMDBD-CO2 product which was assigned to stable bicarbonate. In case DBN, it is shown that two DBN-CO2 products are formed, suggested be bicarbonate unstable carbamate. role water in as well stability environmental moisture also investigated. results suggest carbamate favored dry but presence decompose form Thermal analysis...
Abstract Natural rubber/gold nanoparticles membranes (NR/Au) were studied by ultrasensitive detection and chemical analysis through surface‐enhanced Raman scattering resonance in our previous work (Cabrera et al., J. Spectrosc. 2012, 43, 474). This article describes the studies of thermal stability mechanical properties SERS‐active substrate sensors. The composites prepared using NR obtained casting latex solution as an active support (reducing/establishing agents) for incorporation...
ABSTRACT The application of fibers associated with drugs is a promising alternative to meet the clinical needs tissue repair. Curcumin exhibits great cicatricial potential because it has numerous pharmacological properties. This research aimed produce polycaprolactone and copolymer F‐108 curcumin evaluate in vivo their action on process wound healing. were produced by electrospinning technique characterized scanning electron microscopy (SEM), X‐ray diffractometry (XRD), fluorescence...
ABSTRACT Natural rubber membranes were fabricated using latex from Hevea brasiliensis trees (clone RRIM 600) by casting, and controlling the time temperature of thermal treatment. Three temperatures used: 65, 80 120 °C corresponding annealing times 6, 8, 10 12 h. The centrifugation produces constituent phases: solid (F1), serum or protein components (F2) bottom fraction (F3). photoluminescence properties could be correlated with organic acid latex. used as active substrate (reducing agent)...
Due to the generation of difficult-to-separate waste by industrial and agricultural activities, concern for preserving environment natural resources has gained significant attention in scientific discussions, as increased concentration these materials impacted entire food chain. In this perspective, production polymeric micro nanofiber membranes pollutant remediation been extensively studied mitigate impacts. Using a solution blow spinning technique with commercial airbrush, concentrations...
This work presents the results obtained in production of poly (vinyl alcohol) (PVA) nanofibers with different concentrations polypyrrole (PPy) doped dodecylbenzene sulfonic acid (DBSA) - PPy.DBSA. The morphology was studied by scanning electron microscopy (SEM) technique. were deposited on interdigitated electrodes (IDEs) for direct current electrical characterization (DC) and tested as ammonia gas sensors. showed a rapid detection higher PPy.DBSA several alternating cycles atmospheric N2.
With the advancement of nanotechnology, nanomaterials such as nanofibers have gained attention, they applications in technological, environmental and health areas. In this context, electrospinning stands out for being considered a simple versatile technique that allows production nanofibers. Carbon-based additives been used to compose polymeric matrix responsible obtaining nanofibers, graphene, which among its has gas sensors, it can detect some molecules, including ammonia. Thus, is...