A5081844968- Advanced Cellulose Research Studies
- Adsorption and biosorption for pollutant removal
- Electrospun Nanofibers in Biomedical Applications
- Material Properties and Processing
- Lignin and Wood Chemistry
- Membrane Separation Technologies
- Recycling and Waste Management Techniques
- Surface Modification and Superhydrophobicity
- biodegradable polymer synthesis and properties
- Microplastics and Plastic Pollution
- Nanocomposite Films for Food Packaging
- Enzyme-mediated dye degradation
- Nanomaterials for catalytic reactions
- Advanced Sensor and Energy Harvesting Materials
- Pickering emulsions and particle stabilization
- Analytical chemistry methods development
- Radioactive element chemistry and processing
- Advanced Polymer Synthesis and Characterization
- Granular flow and fluidized beds
- Fiber-reinforced polymer composites
- Biosensors and Analytical Detection
- Chemical Synthesis and Characterization
- Extraction and Separation Processes
- Arsenic contamination and mitigation
- Hydrogels: synthesis, properties, applications
Université du Québec à Trois-Rivières
2016-2025
Stockholm University
2021
Laboratoire de Cristallographie et Sciences des Matériaux
1978
Centre National de la Recherche Scientifique
1978
In this study three different ways of applying ultrasound for the production nanocellulose from native cellulose were explored. first option bleached hardwood kraft pulp was oxidized with (US) assisted TEMPO/NaBr/NaOCl-system (US-TEMPO-system) followed by mechanical separation nanocellulose. The US-TEMPO-system had higher carboxyls content and ca. 10% increase in yield when compared to TEMPO-system without sono catalysis. second pretreated using TEMPO-system. Although there no gain process...
In this study application of ultrasound in oxidizing native cellulose for the production nanocellulose has been explored first time. Bleached hardwood kraft pulp was oxidized with an (US) catalyzed 2,2,6,6-tetramethylepiperidin-1-oxyl (TEMPO) system (US-TEMPO-system) at five different temperatures – 5, 15, 25, 35, and 45°C two pH ranges, 8.5-9.0 10.0-10.5 to obtain optimum reaction conditions. The temperature have significant effect on kinetics formation carboxylate pulps produce...
Abstract Presence of aldehydes on cellulose nanofibers (alternatively called nanocellulose) produced from TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyle)-oxidized pulp could interfere with the grafting selected compounds carboxyls group oxidized or such pulps. A simple protocol, post-oxidation, utilizing sodium chlorite under acidic conditions has been developed for TEMPO-oxidized native to oxidize carboxyls. The chemical nature, degree polymerization, nanocellulose yield, and brightness...
Abstract Paper packaging coated with synthetic materials raises major environmental and health concerns. As a response, new promising approaches consist of using sustainable coatings based on nano‐biocomposites. In this work, polylactic acid (PLA)/organoclays (OC) aqueous dispersions thickened by xanthan gum were applied paper the bar coating technique. Morphological topographical analyses scanning electron microscopy laser confocal showed smooth polymeric layer completely covering fibrous...
The properties of phosphorylated kraft fibers, including their flame retardancy and behavior in water, such as electrical charge swelling capacity, were investigated this study. Two different phosphorus contents three forms fibers (ammonium, acid, sodium) analyzed. All types exhibited high char formation limiting oxygen index (LOI) values, indicating good retardancy. In particular, the ammonium form best highest LOI value. density capacity significantly increased by phosphorylation. Alkaline...