A5062574033- Advanced Cellulose Research Studies
- Biofuel production and bioconversion
- biodegradable polymer synthesis and properties
- Material Properties and Processing
- Pigment Synthesis and Properties
- Lignin and Wood Chemistry
- Catalysis for Biomass Conversion
- Dyeing and Modifying Textile Fibers
- Enzyme Production and Characterization
- Force Microscopy Techniques and Applications
- Cultural Heritage Materials Analysis
- Food composition and properties
- Extraction and Separation Processes
- Conducting polymers and applications
- Organometallic Complex Synthesis and Catalysis
- Advanced Surface Polishing Techniques
- Advanced Battery Technologies Research
- Ionic liquids properties and applications
- Enzyme-mediated dye degradation
- Chemical Thermodynamics and Molecular Structure
- Catalysts for Methane Reforming
- Chemical and Physical Properties in Aqueous Solutions
- Adsorption and biosorption for pollutant removal
- Carbon dioxide utilization in catalysis
- Advanced Chemical Physics Studies
VTT Technical Research Centre of Finland
1999-2022
Tieto (Finland)
2019-2020
Espoo Music Institute
2016-2019
University of Helsinki
2006
Åbo Akademi University
1995
The sustainability of the global protein production is seriously challenged, why upgrading from new or under-utilized sources such as brewer's spent grain (BSG) desirable. In this article a method for high-yield extraction BSG with deep eutectic solvents (DESs) reported. Novel carboxylate salt - urea DESs are described and using 6 these mixtures compared. 90 wt% NaAcO : (molar ratio 1:2) was compared to choline chloride (1:2), which first found be more suitable extractant up 79% yields BSG....
Poultry feathers, a source of keratin, are significant side stream from the food industry, for which valorization is essential considering circular economy aspects. For this, ecofriendly processes tools that allow easy and feasible transformation feathers. Deep eutectic solvents (DESs) generally considered as inexpensive, relatively simple, mild environmentally friendly can dissolve proteins protein-rich biomasses. In this work, feathers were processed with an aqueous DES to produce uniform...
Summary A combination of molecular modelling and atomic force microscopy (AFM) techniques was used to study the surface structure crystalline cellulose. Two‐dimensional Fourier analysis AFM raw data gave crystal parameters as well a highly filtered inverse‐transformed image. Molecular generate Connolly surfaces based on electron diffraction for The modelled were interpret experimental images. Monoclinic ( ) faces identified. method enables structural cellulose at level, where all biological...
Abstract Green chemistry, sustainability and eco-efficiency are guiding the development of next generation industrial chemical processes. The use non-edible lignocellulosic biomass as a source chemicals fuels has recently raised interest due to need for an alternative fossil resources. Valorisation mainly focuses on cellulose, which been used various scale applications decades. However, creating economically more viable value chain would require exploitation other main components,...
Cellulose-based filaments produced with ionic liquid-based processes have high application potential in textiles and composites to replace cotton fibres.
To be regarded as environmentally friendly and economical, an industrial process using 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) oxidation requires recycling and/or recovery of chemicals.In this work, hypochlorite via electrolysis was evaluated potential means for TEMPO were explored.The most important variable affecting electrochemical conversion the concentration sodium chloride in feed solution.With 30 g/L NaCl salt, a sufficient 0.8% could obtained pulp up to 5% consistency.The...
This study deals with an investigation of how substitution alcohol group by a thiol in mixtures choline chloride series bio-sourceable molecules affects the physico-chemical properties and their ability to dissolve metal oxides. All studied showed higher affinity selectivity for late transition metals physical were improved compared analogues (i.e. lower viscosity, wider liquid range). The solubility was assessed via determination final concentration oxides dissolved inductively coupled...
Safe biodegradable “green” alternatives with minimal environmental and health risks have received widespread research interest. Thirty different kinds of bio-based flocculants (modified starches, modified celluloses, native chitosan, lignin-based flocculant) were pre-tested using a simple jar test for the examination applicability new organic in papermaking conditioning waste activated sludge from pulp paper industry. Three starch-based two cellulose-based polymers chosen further...
Abstract The electronic factors of external alkoxysilane donors used in modern Ziegler‐Natta catalyst systems were estimated by quantum mechanical MNDO (modified neglect diatomic overlap) calculations on model compounds. calculated electron densities oxygen atoms alkoxy groups plotted against the experimental activity and isotacticity propene polymerization. steric hindrance volume compounds investigated as structural important to results indicate that performance donor is affected both...
We study theoretically the light-scattering efficiency of paper coatings made starch acetate pigments. For code we use a discrete dipole approximation method. The coating layer is assumed to consists roughly equal-sized spherical pigments packed either at packing density 50% (large cylindrical slabs) or 37% 57% spheres). Because scanning electron microscope images samples show particulate porous structure, model in two complementary ways. material can be inside constituent spheres...
A surface model of crystalline cellulose was constructed based on the crystal structure sea alga Valonia ventricosa (Gardner and Blackwell, 1974). The optimized by minimizing intra- intermolecular energies. Interactions between tail domain CBH I were explored using molecular dynamics calculations carried out in vacuum. binding to a relatively large portion linear polysaccharide has shown involve numerous individually weak interactions (van der Waals H-bonds). This preliminary research is...
Abstract Crosslinking and stretching (2.5 times along the circumferential direction) of molten polymer during extrusion produced pipes with dominantly orientation a lower degree axial chain orientation. Differential scanning calorimetry (crystallinity crystal thickness), density measurements (crystallinity), X‐ray diffraction (c‐axis orientation), infrared dichroism (crystalline amorphous orientation) contraction (molecular draw ratio) assessed microstructure pipe material. The mechanical...