A5106791100- Membrane Separation and Gas Transport
- Membrane Separation Technologies
- Membrane-based Ion Separation Techniques
- Electrospun Nanofibers in Biomedical Applications
- biodegradable polymer synthesis and properties
- Nerve injury and regeneration
- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- Nerve Injury and Rehabilitation
- Surface Modification and Superhydrophobicity
- Adsorption, diffusion, and thermodynamic properties of materials
- Microplastics and Plastic Pollution
- Environmental remediation with nanomaterials
- Graphene and Nanomaterials Applications
- Fuel Cells and Related Materials
- Textile materials and evaluations
- Advanced Battery Technologies Research
- Parallel Computing and Optimization Techniques
- Mesenchymal stem cell research
- Material Properties and Processing
- Carbon Dioxide Capture Technologies
Ministry of Defence
2025
Universidade Federal do Rio de Janeiro
2000-2020
National Institute of Technology Durgapur
2009
Brazilian Agricultural Research Corporation
2002-2004
During hollow fiber spinning many variables are involved whose effects still not completely clear. However, its understanding is of great interest because the control these may originate membranes with desired morphologies and physical properties. In this work, phase inversion process induced by immersion precipitation technique was applied to prepare fibers membranes. It verified that some involved, can promote a visco-elastic polymer solution expansion, called die-swell phenomenon, which...
ABSTRACT Poly(lactic acid) (PLA) hollow‐fiber (HF) membranes were prepared by wet spinning with a phase‐inversion technique. Dimethyl sulfoxide (DMSO), N ‐methyl‐2‐pyrrolidone (NMP), and 1,4‐dioxane (DIO) applied as solvents (Ss), water was nonsolvent in the precipitation bath. The polymer solution viscosities, PLA–S–water miscibility regions, onsets measured related to Hansen solubility Flory–Huggins interaction parameters. We observed morphological transition from fingerlike spongelike...
Abstract This work investigated membrane formation using Lewis acid–base complexes in a polymer solution, which consisted of poly(ether sulfone) (PES), formed by N ‐methyl‐2‐pyrrolidone (NMP, base), and dicarboxylic or monocarboxylic acids from homologous series (Lewis acids). The solutions were characterized viscosity measurements, IR spectroscopy, cloud point determination, light transmission experiments. membranes scanning electron microscopy gas permeation tests. results indicated that...
Summary Biodegradable and biocompatible polymers have been evaluated as materials for membrane separation based processes due to their flexibility highly aggregated value in biomedical, food packaging applications. Polylactides is a promising class of biodegradable mostly its mechanical properties ease processing. In this work, flat sheet Poly(L‐lactic acid) (PLLA) membranes were made by liquid induced phase (LIPS) technique using water non‐solvent N‐methyl‐2‐pyrrolidone (NMP) solvent....
Abstract In the present work, hollow fiber formation was investigated by using Lewis acid : base complexes in polymer solution. The studied systems consisted of poly(ether sulfone); N ‐methyl‐2‐pyrrolidone (NMP) as solvent and base, acetic, propionic, n ‐caproic, adipic acids additives acids. Bore liquid formed water/NMP solutions, well vaseline; whereas water used external precipitation bath. spinneret bath distance (i.e., air gap) also varied. membranes were characterized scanning electron...
Abstract In the present work, different poly(vinil fluoride) (PVDF) were selected for preparing membranes, based on fact that they are able to form polymer solutions with viscosities. This characteristic can affect spinning, as well as, mass transfer between solution and precipitation bath; therefore, each PVDF differently membrane formation. The effect of additives in was also investigated. Flat sheet hollow fiber membranes characterized by Scanning Electron Microscopy analysis, contact...
ABSTRACT Poly(lactic acid) membranes are being developed as biomaterials for several purposes such artificial implants peripheral nerve injury, also known neural guide conduits (NGC). These need to meet standards of mechanical, degradability, and permeability properties, besides dimensional structural requirements. Among the stereoisomers polylactides, poly( l ‐lactic acid), d , most used biomaterials, having significant differences in solubility, crystallinity thermal, mechanical...