A5044109627- Polyoxometalates: Synthesis and Applications
- Lignin and Wood Chemistry
- Conducting polymers and applications
- Education Pedagogy and Practices
- Advanced Photocatalysis Techniques
- Clay minerals and soil interactions
- Business and Management Studies
- Petroleum Processing and Analysis
- Hydrogels: synthesis, properties, applications
- Biodiesel Production and Applications
- Lubricants and Their Additives
- Polymer Nanocomposites and Properties
- biodegradable polymer synthesis and properties
- Carbon dioxide utilization in catalysis
- Education and Digital Technologies
Universidade Federal do Piauí
2012-2025
In the present study, powders of α-Ag2WO4 (PAW) and β-Ag2MoO4 (PAM) were prepared through coprecipitation method, while poly(vinyl alcohol) nanofibers (FPVA) composite PVA/α-Ag2WO4 (FPAW) PVA/β-Ag2MoO4 (FPAM) using electrospinning technique. Several characterization techniques applied to evaluate structure obtained materials, as well studies for assessing their antimicrobial properties. The activities composites against Pseudomonas aeruginosa Staphylococcus aureus investigated minimum...
Este trabalho descreve a preparação de biodiesel proveniente óleo babaçu, mamona e misturas destes em várias proporções, utilizando compostos alcalinos estrôncio (SrO + SrCO 3 Sr(OH) 2 ) como catalisadores heterogêneos.A mistura óleos dessas oleaginosas foi utilizada na produção com parâmetros qualidade que atendam legislação vigente.O catalisador caracterizado por difratometria raios X (XRD), fisissorção gas (método BET), microscopia eletrônica varredura (SEM), espectroscopia dispersão...
Glycerol, a by-product from biodiesel production can react with di-carboxylic organic acids, resulting in polyesters, and be used the composition of urea/formaldehyde or phenol/formaldehyde resins to improve qualities adhesion moisture resistance them. In this work, six kinds derived glycerol, named as GAA (glycerol/adipic acid), GAAU acid/urea), GAF (glycerol/phtalic GU (glycerol/urea), GUF (glycerol/urea/formaldehyde) GF (glycerol/formaldehyde), were synthesized. The carboxylic acids had...
Modified clays with organic molecules have many applications, such as the adsorption of pollutants, catalysts, and drug delivery systems. Different methodologies for intercalating these structures moieties can be found in literature purposes. In this paper, a new methodology modifying Sodium Montmorillonite (Na-Mt) faster drying time was investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), BET, thermogravimetric analysis (TG DTG). modification process,...