A5101622667- Advanced Cellulose Research Studies
- Lignin and Wood Chemistry
- biodegradable polymer synthesis and properties
- Polysaccharides and Plant Cell Walls
- Nanocomposite Films for Food Packaging
- Carbohydrate Chemistry and Synthesis
- Hydrogels: synthesis, properties, applications
- Biofuel production and bioconversion
- Polysaccharides Composition and Applications
- Surfactants and Colloidal Systems
- Polymer Surface Interaction Studies
- Electrospun Nanofibers in Biomedical Applications
- Biopolymer Synthesis and Applications
- Catalysis for Biomass Conversion
- Food composition and properties
- Synthesis and properties of polymers
- Nanoparticle-Based Drug Delivery
- Click Chemistry and Applications
- Advanced Polymer Synthesis and Characterization
- Aerogels and thermal insulation
- Electrohydrodynamics and Fluid Dynamics
- Ionic liquids properties and applications
- Enzyme Catalysis and Immobilization
- Enzyme Production and Characterization
- Dyeing and Modifying Textile Fibers
Friedrich Schiller University Jena
2016-2025
Leibniz Institute of Photonic Technology
2010-2021
Åbo Akademi University
2010-2018
Humboldt-Universität zu Berlin
2014
Thuringian Institute of Textile and Plastics Research
2007-2012
Kyoto University
2011
University of Nottingham
2011
University of Maribor
2011
Innovent
2010
N2 Biomedical (United States)
2010
The availability of xylan-type polysaccharides, representing an immense resource biopolymers for practical application, is summarized. Xylans constitute 25–35% the dry biomass woody tissues dicots and lignified monocots occur up to 50% in some cereal grains. most potential sources xylans include many agricultural crops such as straw, sorghum, sugar cane, corn stalks cobs, hulls husks from starch production, well forest pulping waste products hardwoods, particular. structural diversity...
Abstract Summary: The application of different ionic liquids (IL), namely 1‐ N ‐butyl‐3‐methylimidazolium chloride ([C 4 mim] + Cl − ), 3‐methyl‐ ‐butyl‐pyridinium and benzyldimethyl(tetradecyl)ammonium were investigated as solvents for cellulose. ILs used have the ability to dissolve cellulose with a degree polymerization in range from 290 1 200 very high concentration. Using [C , no degradation polymer appears. By 13 C NMR measurement it was confirmed that this IL is so‐called...
Ionic liquids (ILs) namely 1-N-butyl-3-methylimidazolium chloride ([C4mim]+Cl−), 1-N-ethyl-3-methylimidazolium ([C2mim]+Cl−), 1-N-butyldimethylimidazolium ([C4dmim]+Cl−) and 1-N-allyl-2,3-dimethylimidazolium bromide ([Admim]+Br−) were investigated as solvent for the homogeneous acylation carbanilation of biopolymer cellulose. Cellulose acetates with a degree substitution (DS) in range from 2.5 to 3.0 are accessible within 2 h at 80 °C complete procedure. The cellulose fatty acid lauroyl...
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 with a degree of polymerization up to 650 can be dissolved in dimethyl sulfoxide containing 10 20% (w/v) tetrabutylammonium fluoride trihydrate without any pretreatment within 15 min at room temperature. The new solvent classified as non-derivatizing one concluded from 13C NMR measurements. used reaction medium for the homogeneous functionalization polymer. esters are prepared very effective by transesterification reactions. functional groups distributed order expected conversion,...
Steady state shear flow of different types cellulose (microcrystalline, spruce sulfite and bacterial) dissolved in 1-ethyl-3-methylimidazolium acetate was studied a large range concentrations (0−15%) temperatures (0−100 °C). Newtonian recorded for all experimental conditions; these viscosity values were used detailed viscosity−concentration viscosity−temperature analysis. The exponent the power law found to be around 4 from 0 40 °C, which is comparable with other solvents, 2.5−3 60−100 °C....
Nanoprecipitation is applied for the first time as a general concept manufacturing nanoparticles of versatile hydrophobic polymer classes. As result, molecules self-assemble into nanospheres or irregularly shaped during transition from dissolved state to solid while using different solvents and methods conversion.
Glycopolymers consisting of styrene (St) and pentafluorostyrene (PFS) were synthesized by a combination nitroxide-mediated polymerization "click" chemistry. A series well-defined homopolymers as well block random copolymers St PFS obtained with different ratios using Bloc Builder an alkoxyamine initiator. Some showed self-assembly behavior into regular nanospheres diameters ranging from 70 to 720 nm applying the nanoprecipitation technique. In addition, thiol−glycoside...
Abstract Summary: The copper‐catalyzed Huisgen reaction as a typical example of click chemistry was realized with the polysaccharide cellulose for first time. generality, selectivity, and efficiency perfectly fit requirements modification, which is demonstrated by introduction triazole‐spacer bound functional groups, i.e., carboxylic ester, thiophene, aniline moieties. Azide moieties introduced into via tosyl derivative were simply transferred ethynyl compounds under Cu(I) catalysis mild...
The use of ionic liquids (ILs) in the field cellulose chemistry opens up a broad variety new opportunities. Besides regeneration biopolymer to fibers, films, and beads, this class solvents is particularly useful for homogeneous chemical modification polysaccharide. In review, potential ILs as reaction medium functionalization discussed. It shown that numerous conversions proceed very efficiently may be recycled. But it also demonstrated some side reactions have considered.
Abstract Bacterial cellulose produced by the gram‐negative bacterium Gluconacetobacter xylinum was found to be an excellent native starting material for preparing shaped ultra‐lightweight aerogels. The procedure comprises thorough washing and sterilization of aquogel, quantitative solvent exchange subsequent drying with supercritical carbon dioxide at 40 °C 100 bar. average density obtained dry aerogels is only about 8 mg · cm −3 which comparable most lightweight silica distinctly lower than...
ABSTRACT Chronic wounds contain elevated levels of proteases, proinflammatory cytokines, and free radicals. The presence bacteria further exaggerates the tissue‐damaging processes. For successful treatment, wound dressing needs to manage exudates, create a moist environment, inhibit infection, bind pathophysiological factors that are detrimental healing, provide thermal isolation. Furthermore, it has relieve pain, be easy use, show no allergic potency, not release toxic residues. present...
Abstract Summary: Bacterial cellulose (BC), a unique type of cellulose, with high degree polymerization 6 500 could be dissolved easily in the ionic liquid 1‐ N ‐butyl‐3‐methylimidazolium chloride. For first time, well‐soluble BC acetates and carbanilates substitution (up to complete modification all hydroxyl groups) were accessible under homogeneous mild reaction conditions. Characterization new derivatives by NMR FTIR spectroscopy shows an unexpected distribution acetyl moieties order O‐6...