A5083652512- Advanced Cellulose Research Studies
- Lignin and Wood Chemistry
- Biofuel production and bioconversion
- Polysaccharides and Plant Cell Walls
- Material Properties and Processing
- Nanocomposite Films for Food Packaging
- Chemical synthesis and alkaloids
- Polysaccharides Composition and Applications
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Alkaloids: synthesis and pharmacology
- Carbohydrate Chemistry and Synthesis
- Effects and risks of endocrine disrupting chemicals
- Microplastics and Plastic Pollution
- biodegradable polymer synthesis and properties
- Advanced Synthetic Organic Chemistry
- Recycling and Waste Management Techniques
- Chemical Synthesis and Reactions
- Polymer Foaming and Composites
- Pickering emulsions and particle stabilization
- Pigment Synthesis and Properties
- Thermochemical Biomass Conversion Processes
- Electromagnetic wave absorption materials
- Plant Gene Expression Analysis
- Consumer Packaging Perceptions and Trends
- Coordination Chemistry and Organometallics
VTT Technical Research Centre of Finland
2012-2023
Tieto (Finland)
2019
Keskuslaboratorio
1997-2009
University of Helsinki
1995-1998
We present wetting, hygroscopicity, and interfacial activity of hemicellulose with respect to etherification contrast it their potential as modifiers, which is demonstrated by oil-in-water emulsification containing up 60 vol% the oil phase. Tunable amphiphilicity hardwood softwood hemicelluloses, xylans, galactoglucomannans, respectively, was accomplished via controlled etherification. A series degree substitution (DS) hydroxypropylated 3-butoxy-2-hydroxypropylated ("butylated") grades...
Influence of the supramolecular structure thin films more crystalline cellulose (left) and highly amorphous (middle) on water vapour induced behaviour (right).
Biomass is a promising alternative for the production of energy, novel materials, chemicals, and other valuable products. A certain degree processing required to achieve those results. Hydrothermal processes offer unique way obtain wide range biorefinery They can be considered as environmentally friendly processes, using solely water at different temperatures process medium convert abundant inexpensive biomass into We provide short overview on hydrothermal that use in its liquid state,...
A new type of polysaccharide (hemicellulose) nanocrystal, bearing the shape an anisotropic nanoflake, emerged from a dimethyl sulfoxide (DMSO) dispersion wood-based xylan through heat-induced crystallization. The dimensions these nanocrystals were controlled by crystallization conditions. Sharp signals in solid-state NMR indicated well-ordered crystal structure. unit cell is constituted two asymmetric xylose residues, and DMSO molecules resided host–guest arrangement with more than one local...
Summary In modern structural analysis of complex mixtures wood polysaccharides, methylation is still a valuable and powerful tool for linkage analysis. this paper, described the procedure methylation, methanolysis, silylation GC/MS. The retention time indexes partly methylated methyl glycosides relevant polysaccharides are listed together with ratios isomers different units. A calculation model relative molar response factors suggested based on published FID detection experimental data....
Abstract Residual lignin carbohydrate complexes (RLCC) were isolated enzymatically from spruce and pine pulp. The RLCCs contained 4.9–9.4% carbohydrates, with an enrichment of galactose arabinose compared to the original pulp samples. main units present in all studied 4-substituted xylose, 4-, 3- 3,6-substituted galactose, glucose 4 4,6-substituted mannose. These assigned residues xylan, 1,4- 1,3/6-linked galactan, cellulose glucomannan. surface material inner part kraft fiber obtain...
ABSTRACT Toxic mineral oils can migrate into foods from cardboard boxes made of recycled fibers. This is an emerging issue for the whole dry‐food‐packaging industry. Breakfast cereals, example, are typically packaged in with or without inner bags and consumed further processing. Currently, fossil‐based high‐density polyethylene (HDPE) films used as a major raw material such bags. However, HDPE very poor barrier against mineral‐oil migration. Biobased coatings cellulose nanofibrils (CNFs),...
Softwood bark is a rich source of renewable chemicals, including phenolic compounds known as tannins. Tannins can be extracted from with hot water, but the yield relatively low, leading to dilute extracts. Next tannin, considerable amount dry matter comprised carbohydrates, and carbohydrates limit applicability extract in applications that demand high purity. This study used membrane filtration refine concentrate tannins produced water extracts softwood bark. Enzymatic hydrolysis prior was...
Abstract The effect of refining on the fiber wall was studied for bleached kraft pulp fractions from pine first thinnings and sawmill chips. Hydrocyclone fractionation both pulps produced enriched in earlywood latewood fibers. Some external fibrillation but no changes thickness were observed thin-walled fibers during refining. Refining thick-walled led to extensive a decrease thickness. pore structure opened up all fractions. Earlywood more porous than fibers, those had large pores other In...
This study relates to the release of non-cellulosic components (cell wall heteropolysaccharides, lignin, and extractives) from swollen wood fibers in presence an anionic surfactant (sodium dodecyl sulfate, SDS) at submicellar concentrations. Highly surface-active aggregates form between SDS leached, components, which otherwise do not occur cationic or nonionic surfactants. The situ efficient generation liquid foams leached species is demonstrated. foaming capacity foam stability, as well...
ABSTRACT Hot melt adhesives (HMAs) are formulated for the first time with different lignins as major components, and developed HMA formulations were tested gluing paperboard. The best showed equal or even better bond strength compared to a commercial reference. A maximum of 16.1 N was achieved formulation oxidized cellulose acetate, organosolv lignin, triethyl citrate, whereas reference 10.5 N. performance adjusted via selection formulation, chemical modification. Lignin modification not...
Abstract A method for testing the mineral oil barrier properties of packaging materials has been developed as a response concerns on contamination food by compounds. The aim was to provide an efficient tool evaluate with respect this. is modification so‐called cup test using model compounds comparable components different length and configuration hydrocarbon chain. are introduced in gas phase penetrants. absorbed amounts, which have migrated through barrier, analysed from simulant or...
Abstract Development of physical properties bleached eucalyptus kraft pulp is typically based on the refining process. However, many studies have reported that xylan deposition a viable alternative. As mechanisms and cellulose interactions are not clear, main goal this study was to achieve better understanding these interactions. Considering sample enriched with very complex matrix, model system developed. Cellulosic thin films were prepared by spincoating Langmuir-Schaefer (LS) method from...