A5025456283- Advanced Cellulose Research Studies
- Electrospun Nanofibers in Biomedical Applications
- Nanocomposite Films for Food Packaging
- Biosensors and Analytical Detection
- biodegradable polymer synthesis and properties
- Natural Fiber Reinforced Composites
- Advanced biosensing and bioanalysis techniques
- Advanced Chemical Sensor Technologies
- Advanced Sensor and Energy Harvesting Materials
- Analytical Chemistry and Sensors
- Electrochemical sensors and biosensors
- Conducting polymers and applications
- Wound Healing and Treatments
- Burn Injury Management and Outcomes
- Polydiacetylene-based materials and applications
- Polymer Nanocomposites and Properties
- Postharvest Quality and Shelf Life Management
- Nanoparticles: synthesis and applications
- Graphene and Nanomaterials Applications
- Agricultural and Food Sciences
- Carbon and Quantum Dots Applications
- Academic Research in Diverse Fields
- Advanced Nanomaterials in Catalysis
- Chemistry Education and Research
- Dye analysis and toxicity
Brazilian Agricultural Research Corporation
2013-2025
Universidade Federal de São Carlos
2010-2020
Laboratório Nacional de Nanotecnologia
2012
Hydrogen peroxide (H2O2) is an important compound for several industrial sectors, but it becomes harmful to human health under high concentrations. Thus, the development of simple, low cost and fast analytical methods capable detect monitor H2O2 fundamentally important. In present study, we report a simple route synthesizing silver nanoparticles (AgNPs) in presence nanostructured polysaccharide (cellulose nanowhiskers) produce hybrid material, which was employed as colorimetric probe...
Mercury is a heavy metal highly deleterious for the environment being associated to several diseases. Thus, novel and expedite techniques capable of detecting this in water, even at trace levels, are sought human environmental safety purposes. Here we developed electrochemical sensor mercury(II) using green hybrid nanoarchitecture composed reduced graphene oxide (rGO), cellulose nanowhiskers (CNW) polyamide 6 (PA6) electrospun nanofibers. Scanning transmission electron microscopy (STEM),...
Low-cost, instrument-free colorimetric tests were developed to detect SARS-CoV-2 using plasmonic biosensors with Au nanoparticles functionalized polyclonal antibodies (f-AuNPs). Intense color changes noted the naked eye owing plasmon coupling when f-AuNPs form clusters on virus, high sensitivity and a detection limit of 0.28 PFU mL-1 (PFU stands for plaque-forming units) in human saliva. Plasmon was corroborated computer simulations finite-difference time-domain (FDTD) method. The strategies...
Therapeutic intervention to skin wounds requires covering the affected area with wound dressings. Interdisciplinary efforts have focused on development of smart bandages that can perform multiple functions. In this direction, here, we designed a low cost (U$0.012 per cm2) multifunctional therapeutic dressing fabricated by loading curcumin (CC) into poly(ϵ-caprolactone) (PCL) nanofibers using solution blow spinning (SBS). The freestanding PCL/CC were characterized distinct physicochemical...
Abstract This work evaluates the use of cotton cellulose nanofibers (CCN) as a reinforcing agent to prepare thermoplastic corn starch (TPS) matrix plasticized with 30 wt % glycerol. The nanocomposites were filled 0.5–5.0 CCN on dry‐starch basis. dried resuspended through an ultrasonicator and then introduced in fixed water formulation for obtaining TPS. compounded corotating twin‐screw extruder. Scanning transmission electron microscopy (STEM), field emission gun (FEG), X‐ray diffraction...
Neste trabalho, os efeitos de diferentes condições tempo e temperatura usados para a preparação whiskers sisal foram investigados com o objetivo se determinar influência destes parâmetros experimentais na morfologia, cristalinidade estabilidade térmica dos materiais preparados. A obtenção deu-se após pré-branqueamento da fibra solução alcalina peróxido hidrogênio. branqueada foi submetida ao processo hidrólise ácido sulfúrico 60% (m/m) sob três tempos extração: 45 °C 60 minutos (WS45_60); 75...
Abstract Sisal whiskers (SW) were prepared by acid hydrolysis for subsequent evaluation as reinforcing material biodegradable matrices of thermoplastic starch (TPS) and TPS/polycaprolactone (TPS/PCL) blends. The hydrolyzed SW had dimensions 5 ± 2 nm in diameter 210 60 length 78% crystallinity. nanocomposite blends consisted whisker contents 10 wt% coextruded with either TPS or TPS/PCL which formed the matrix material. influence on morphology, crystallinity, thermal properties, mechanical...
Open injuries, resulting from skin tissue ruptures, can expose the human body to pathogenic bacteria, presenting a significant risk for hospitalized patients and individuals with compromised immune systems. At same time, developing alternative therapies usinginnovative methods of drug administration is crucial combating antibacterial resistance. In this study, we present an approach wound healing that synergistically combines traditional antibiotic active natural compound in polymer...
Fibras de sisal com quatro tratamentos, a saber: fibra lavada água, cicloexano/etanol, tratamento alcalino (NaOH) e peróxido (branqueamento), foram incorporadas na blenda amido termoplástico/policaprolactona 80/20 (TPS/PCL). As propriedades morfológicas, mecânicas térmicas dos biocompósitos TPS/PCL/Sisal analisadas. Os compósitos branqueada apresentaram os melhores resultados resistência à tração estabilidade térmica. Verificou-se também melhora da adesão fibra-matriz no compósito...
Cellulose, the main component of plant cell walls, is a biopolymer widely used for industrial applications, including, food, paper and textile fabrication. More recently, hybrid materials composed cellulose nanostructures metal nanoparticles have been applied in diverse areas such as medical pharmaceutical applications. In this work, cellulose-silver (AgNPs) material was synthesized influence cellulose, employed stabilizer agent, investigated. Specifically, whiskers (CCW) were extracted from...
The presence of contaminants in water is a subject paramount importance nowadays, which can make improper to human consumption even when these are present at very low concentrations, causing health issues and economic losses. In this work, we evaluated the performance nanocomposites based on nylon 6,6/chitosan electrospun nanofibers modified by cellulose nanowhiskers combined with functional materials like silver nanoparticles, gold reduced graphene oxide be used as sensing layers an...
Abstract Poly[ethylene‐ co ‐(vinyl acetate)] (EVA) and cellulose nanocrystals (CNCs) from curaua fibers were used to obtain nanocomposites. Due polarity that acetate groups promote in EVA, they tend present better affinity with nanostructures without compatibilizers. In addition, the influence of drying conditions CNCs suspension on their dispersion through matrix was also evaluated. obtained via acid hydrolysis a mixture sulfuric hydrochloric acids. Part neutral freeze‐dried part dried an...
Surface functional groups of molybdenum disulfide (MoS2) quantum dots (QDs) can play a fundamental role in their optical properties. Nonetheless, the use fluorescent MoS2 QDs as probes still requires further investigation regarding surface properties and groups. Because such features depend on synthesis procedures employed, which influence nanomaterials' morphologies structure, it becomes essential to understand influences parameters material Here, we demonstrate how tune by alterations they...
Geosmin (GSM) and 2‐Methylisoborneol (MIB) are substances commonly found in river water arise due to eutrophication process. Such contaminants affect the organoleptic properties of water, hampering its consumption, use beverage industries. As human perception threshold for these compounds is low, devices aimed at their detection must be sensitive enough detect concentrations as low a few nanogram per liter order guarantee quality parameters. Due experimental simplicity, fast analysis,...