A5102028414- Advanced Cellulose Research Studies
- Lignin and Wood Chemistry
- Pickering emulsions and particle stabilization
- Polysaccharides and Plant Cell Walls
- Polysaccharides Composition and Applications
- Polymer composites and self-healing
- Electrospun Nanofibers in Biomedical Applications
- Ionic liquids properties and applications
- Membrane-based Ion Separation Techniques
- Proteins in Food Systems
- Enhanced Oil Recovery Techniques
- biodegradable polymer synthesis and properties
- Biofuel production and bioconversion
- Membrane Separation Technologies
- Surfactants and Colloidal Systems
- Catalysis for Biomass Conversion
- Rheology and Fluid Dynamics Studies
- Drilling and Well Engineering
- Material Properties and Processing
Mid Sweden University
2017-2024
Pontifical Catholic University of Rio de Janeiro
2018
Sundsvall Municipality
2017
Cellulose is the most abundant polymer and a very important renewable resource. Since cellulose cannot be shaped by melting, major route for its use novel materials, new chemical compounds energy must go via solution state. Investigations during several decades have led to identification of solvents notably different character. The mechanisms dissolution in terms intermolecular interactions been discussed from early work but, even on fundamental aspects, conflicting opposite views appear. In...
Poly(butylene succinate) (PBS) has been drawing attention as a reliable biodegradable and sustainable alternative to synthetic petroleum-based polymers. In this study, PBS-lignin composites were developed using recently extracted lignin (LA-lignin) from pine wood residues employing an innovative approach. These systematically compared with PBS-based formed commonly used technical lignins. The molecular weight of the lignins was evaluated, along various structural performance-related...
Diffusing wave spectroscopy (DWS) is a powerful optical technique suitable to investigate turbid samples in nondestructive and reproducible way, providing information on the static dynamic properties of system. This includes relative displacement emulsion droplets over time changes viscoelastic properties. Here, novel promising cellulose-based oil-in-water (O/W) emulsions were prepared studied, for first time, by DWS. Cellulose plays role eco-friendly emulsifying agent. The hydrolysis...
Cellulose-based oil-in-water (O/W) emulsions were studied by diffusing wave spectroscopy (DWS) regarding the effect of cellulose concentration and mixing rate on average droplet size, microrheological features stability. Furthermore, microstructure these was imaged cryo-scanning electron microscopy (cryo-SEM). The micrographs showed that effectively adsorbed at oil-water interface, resembling a film-like shell protected oil droplets from coalescing. non-adsorbed observed in continuous...
Aqueous sodium hydroxide solutions are extensively used as solvents for lignin in kraft pulping. These also appealing systems cellulose dissolution due to their inexpensiveness, ease recycle and low toxicity. Cellulose occurs a narrow concentration region at temperatures. Dissolution is often incomplete but additives, such zinc oxide or urea, have been found significantly improve dissolution. In this work, was explored possible beneficial additive Lignin cold alkali, extending the NaOH range...
The selective extraction and recovery of different lignocellulosic molecules interest from forestry residues is increasing every day not only to satisfy the needs driving a society toward more sustainable approaches materials (rethinking waste as valuable resource) but also because have several applications. For this purpose, development new ecologically benign has grown significantly. Deep eutectic solvents (DESs) appear promising alternative for processing manipulation biomass. In present...
Some aspects of the interfacial behavior cellulose dissolved in an aqueous solvent were investigated. Cellulose was found to significantly decrease tension (IFT) between paraffin oil and 85 wt% phosphoric acid solutions. This similar magnitude that displayed by non-ionic derivatives. Cellulose's activity indicated a significant amphiphilic character derivatives is not only related derivatization but inherent backbone. finding suggests would have ability stabilizing dispersions, like...
Novel mixed matrix polymeric membranes were prepared by incorporating self-produced zinc oxide coated polyaniline (ZnO-PANI) nanoparticles into polyethersulfone (PES) using phase inversion method. Nanoparticles synthesized, characterized and incorporated in PES with loadings from 0.05 to 0.6 wt %. ZnO-PANI demonstrated effectiveness as a low-cost adsorbent, especially at loading of 0.2 wt%. was used for adsorbing total phenolic compounds (TPC) olive leaf extract (OLE) different initial...
With amphiphilic properties, cellulose molecules are expected to adsorb at the O/W interface and be capable of stabilizing emulsions. The effect solvent quality on formation stability cellulose-based emulsions was evaluated in different alkaline systems: NaOH, NaOH-urea tetrabutylammonium hydroxide (TBAH). optimal solvency conditions for adsorption were found with an intermediate polarity (NaOH-urea), which is line favorable polymer. A very good (in TBAH) interfacial activity cation lead...