A5086695618- Advanced Cellulose Research Studies
- Lignin and Wood Chemistry
- Polysaccharides and Plant Cell Walls
- Nanocomposite Films for Food Packaging
- Biofuel production and bioconversion
- biodegradable polymer synthesis and properties
- Surface Modification and Superhydrophobicity
- Material Properties and Processing
- Pickering emulsions and particle stabilization
- Natural Fiber Reinforced Composites
- Electrospun Nanofibers in Biomedical Applications
- Polymer Surface Interaction Studies
- Polysaccharides Composition and Applications
- Aerogels and thermal insulation
- Enzyme-mediated dye degradation
- Adhesion, Friction, and Surface Interactions
- Liquid Crystal Research Advancements
- Polymer Nanocomposites and Properties
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Polymer Foaming and Composites
- Advanced Materials and Mechanics
- Enzyme Catalysis and Immobilization
- Dyeing and Modifying Textile Fibers
- Force Microscopy Techniques and Applications
- Advanced Sensor and Energy Harvesting Materials
Chalmers University of Technology
2018-2025
Wallenberg Wood Science Center
2019-2025
Aalto University
2011-2025
Fraunhofer Chalmers Research Centre for Industrial Mathematics
2021
BOKU University
2016-2017
North Carolina State University
2014-2016
Forest Products Laboratory
2010
Polysaccharides are among the most abundant bioresources on earth and consequently need to play a pivotal role when addressing existential scientific challenges like climate change shift from fossil-based sustainable biobased materials. The Research Roadmap 2040 of European Polysaccharide Network Excellence (EPNOE) provides an expert's view how future research development strategies evolve fully exploit vast potential polysaccharides as renewable bioresources. It is addressed academic...
Cellulose nanofi brils (CNF), also known as brillar cellulose (NFC), are an advanced biomaterial made mainly from renewable forest and agricultural resources that have demonstrated exceptional performance in composites. In addition, they been utilized barrier coatings, food, transparent fl exible fi lms other applications. Research on CNF has rapidly over the last decade several of fundamental questions about production characterization addressed. An interesting shift focus recent reported...
Taking advantage of the aromatic and cross-linking tendency lignin macromolecules extracted from plants, we present a novel method for their assembly into supracolloidal structures. Specifically, spherical particles with controllable size (∼90 nm to 1 μm) were obtained water-in-oil (W/O) microemulsions formulated mixture nonionic surfactants colloidal dispersion low molecular weight alkali lignin. After spontaneous emulsification, internal lignin-rich phase was cross-linked produce solid...
The cleavage of the C2–C3 bond in building units 1 → 4-linked polysaccharides by periodate formally results two aldehyde units, which are present several masked forms. structural elucidation such polysaccharide dialdehydes remains a big challenge. Since derivatives increasingly applied materials technology, unveiling exact structure is utmost importance. To address this issue for xylan, dialdehyde xylan (DAX, oxidation degree 91.5%) has been synthesized as water-soluble polymer. ATR-FTIR...
Cellulose nanocrystals (CNCs) self-assemble and can be flow-assembled to liquid crystalline orders in a water suspension. The range from nano- macroscale with the contributions of individual crystals, their micron clusters, macroscopic assemblies. resulting hierarchies are optically active materials that exhibit iridescence, reflectance, light transmission. Although these assemblies have potential for future renewable materials, details about structures on different hierarchical levels span...
Abstract The limited access to fast and facile general analytical methods for cellulosic and/or biocomposite materials currently stands as one of the main barriers progress these disciplines. To that end, a diverse set narrow techniques are typically employed often time-consuming, costly, not necessarily available on daily basis practitioners. Herein, we rigorously demonstrate quantitative NMR spectroscopic method structural determination crystalline cellulose samples. Our relies use readily...
The thixotropy of cellulose nanocrystal (CNC) water suspensions is intrinsically dependent on the hierarchical structure suspension. diverse hierarchies that comprise individual CNC nanoparticles and mesophase liquid crystalline domains, chiral nematic structures, contribute selectively to rheological material response. Here, we combine rheology with polarized light imaging (PLI) elucidate thixotropic behavior CNCs suspended in water. simultaneous monitoring PLI tests enables observation...
Bio-based compounds have become the focus in development of next-generation materials. The polyphosphated structure and availability phytic acid has sparked an interest to understand its properties apply it making fire-retardant fabrics. However, degradative effect on natural fibers sets limitations potential uses. In this study, we unveiled a new dimension explore with acid: cellulose fiber foams. Phytic enabled synergistic foaming carboxymethyl albeit causing issues long-term wet foam...
Cellulose microbeads can be used as immobilization supports. We report on the design and preparation of magneto-responsive cellulose microcapsules by self-assembled shells nanocrystals (CNC) carrying magnetic CoFe2O4 nanoparticles, that is, a mixture isotropic anisotropic nanomaterials. The CNCs formed structured layer, mesh, consisting particles bound together surface distinct droplets hexadecane styrene dispersed in water. Because presence highly crystalline mesh was targeted to provide an...
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...
Cellulose II gels from a stream of the Lyocell fiber process were transformed into spherical nanoparticles by carboxymethylation and subsequent homogenization.
Abstract Cellulose nanocrystals (CNCs) self-assemble in water suspensions into liquid crystalline assemblies. Here, we elucidate the microstructural changes associated with nonlinear deformations (2–9 wt%) CNC through rheological analysis, that was performed parallel coupled rheology—polarized light imaging. We show material parameters from Fourier-transform rheology and stress decomposition are sensitive to all phases investigated, i.e. isotropic, biphasic crystalline. This is contrast...
Xylan is a biopolymer readily available from forest resources. Various modification methods, including oxidation with sodium periodate, have been shown to facilitate the engineering applications of xylan. However, procedures are often optimized for semicrystalline high molecular weight polysaccharide cellulose rather than lower and amorphous This paper elucidates procedure periodate xylan into dialdehyde its further reduction dialcohol form focused on work up. The oxidation-reduction...
Nanocellulose-based self-standing films are becoming a substrate for flexible electronics, diagnostics, and sensors. Strength surface chemistry vital variables these film-based endeavors, the former is one of assets nanocellulose. To contribute to latter, nanocellulose tuned with side-specific functionalization, having an aldehyde carboxyl side. The functionalities were obtained combining premodification film components by periodate oxidation ozone post-treatment. Periodate cellulose...
Abstract Organization of nanoparticles is essential in order to control their light-matter interactions. We present cellulose nanocrystal suspension organization flow towards a unidirectional state. Visualization evolving polarization patterns the suspensions combined with steady and oscillatory shear rheology. Elucidation chiral nematic mesophase continuous process enables alignment precursor for structural films reveals thus far situ unrevealed transition states that were not detectable by...
Bacteria are known to form biofilms on various surfaces. Biofilms multicellular aggregates, held together by an extracellular matrix, which is composed of biological polymers. Three principal components the biofilm matrix exopolysaccharides (EPS), proteins, and nucleic acids. The essential for remain organized under mechanical stress. Thanks their polymeric nature, exhibit both elastic viscous characteristics; therefore, accurate description needs take into account viscoelastic nature. Their...