A5070104966- Membrane Separation and Gas Transport
- Membrane Separation Technologies
- Fuel Cells and Related Materials
- Biodiesel Production and Applications
- Synthesis and properties of polymers
- Advanced Sensor and Energy Harvesting Materials
- Enzyme Catalysis and Immobilization
- Catalysis and Hydrodesulfurization Studies
- Membrane-based Ion Separation Techniques
- Lubricants and Their Additives
- Extraction and Separation Processes
- Surface Modification and Superhydrophobicity
- Graphene research and applications
- Polymer crystallization and properties
- Polymer Nanocomposites and Properties
- biodegradable polymer synthesis and properties
- Polymer Surface Interaction Studies
- Advanced Battery Materials and Technologies
- Dialysis and Renal Disease Management
- Covalent Organic Framework Applications
- Carbon Dioxide Capture Technologies
- Electrospun Nanofibers in Biomedical Applications
- Central Venous Catheters and Hemodialysis
- Advanced Battery Technologies Research
- Phase Equilibria and Thermodynamics
Universidade Federal do Rio de Janeiro
2015-2025
University of Waterloo
1979
ABSTRACT Worldwide, 12 million tonnes per year of lubricants are disposed in the environment through leakages, exhausted gas, incorrect disposal, water–oil emulsions and so on. Some resistant to biodegradation, representing an environmental threat. One solution modify this situation is replacement mineral oils by biodegradable synthetic lubricants. Esters, whose chemical structures similar natural triglycerides, excellent substitutes for oils. Castor oil contains around 90% ricinoleic acid,...
Membrane separation processes have been extensively used for some important industrial separations, substituting traditional methods. However, applications require the development of new membranes. In this work, we discuss recent progress achieved in field, focusing on gas and liquid using facilitated transport The advantages a carrier species either membrane or fixed polymer matrix to enhance both flux selectivity are summarized. most probable mechanisms these membranes presented...
In the present work, poly(vinylidene fluoride) (PVDF) hollow fiber membranes were obtained using adipic acid as an additive in dope solution. The PVDF fibers produced used gas-liquid membrane contactor process, aiming at CO2 capture. morphology of was also characterized by scanning electron microscopy and helium ion (HIM). These techniques, mainly HIM, allowed us to clearly observe presence nanopores outer surface, which may favor process efficiency preventing wetting. picnometry, gas...
Low-temperature plasma treatment has been used in the last years as a useful tool to modify surface properties of different materials, special polymers. In present work low temperature was treat asymmetric porous substrates polysulfone (PSf) membranes. The main purpose this study influence exposure time and power supplied argon on permeability Three rf levels, respectively 5, 10 15 W were used. Treatment ranged from 1 50 min. Reduction single gas observed with Ar treatments at energy...
The use of biolubricants is being considered an alternative to reduce problems derived from the actual mineral lubricants, such as pollution soil, water and other ecosystems. Originated vegetable raw materials, main advantage lies in their biodegradability. A promising novel biolubricant can be produced transesterification castor oil biodiesel with trimethylolpropane (TMP) using a lipase Candida rugosa biocatalyst. However, catalyst cost added energy purification costs are yet optimized...
The separation of olefin/paraffin mixtures is one the most important processes chemical industry. This typically carried out by distillation, which an energy and capital intensive process. One promising alternative use facilitated transport membranes, contain specific carrier agents in polymer matrix that interact reversibly with double bond olefin molecule, promoting simultaneous increase its permeability selectivity. In this study, polyurethane (PU) membranes were prepared using two...