A5032438965- Surfactants and Colloidal Systems
- Lipid Membrane Structure and Behavior
- Surface Modification and Superhydrophobicity
- Polymer Surface Interaction Studies
- Fluid Dynamics and Thin Films
- Hydrogels: synthesis, properties, applications
- Advanced Polymer Synthesis and Characterization
- Pickering emulsions and particle stabilization
- Fluid Dynamics and Heat Transfer
- Molecular Junctions and Nanostructures
- Block Copolymer Self-Assembly
- Environmental Chemistry and Analysis
- biodegradable polymer synthesis and properties
- Analytical Chemistry and Chromatography
- Biotin and Related Studies
- Nanomaterials and Printing Technologies
- Supramolecular Self-Assembly in Materials
- Textile materials and evaluations
- Enzyme Catalysis and Immobilization
- Analytical Chemistry and Sensors
- Polymer Nanocomposites and Properties
- Dyeing and Modifying Textile Fibers
- Adhesion, Friction, and Surface Interactions
- Dendrimers and Hyperbranched Polymers
- Force Microscopy Techniques and Applications
Evonik (Germany)
2015-2025
Technical University of Darmstadt
2017
Xerox (France)
1991
Johannes Gutenberg University Mainz
1988-1991
Institute of Organic Chemistry
1989
Abstract The Part and the Whole . principle of self‐organization for creation functional units is not an invention modern natural sciences. It was already a basic idea ancient philosophies in Asia Europe: only mutuality parts creates whole its ability to function. Translated into language chemistry this means: molecules leads supramolecular systems responsible their functions. Thermotropic lyotropic liquid crystals are such units, formed by self‐organization. As highly oriented systems, they...
Der Teil und das Ganze. Nicht erst die moderne Naturwissenschaft hat Selbstorganisation für den Aufbau von Funktionseinheiten entdeckt, schon in alten Philosophien Asiens Europas ist sie ein Grundgedanke: Erst Gemeinsamkeit der Teile schafft Ganze seine Funktionsfähigkeit. Übersetzt Sprache Chemie bedeutet dies: Die Molekülen führt zu supramolekularen Systemen. Thermotrope lyotrope Flüssigkristalle sind solche Funktionseinheiten, sich durch bilden als hochorientierte Systeme neue...
ADVERTISEMENT RETURN TO ISSUEPREVArticleMethanol-water as a co-nonsolvent system for poly(N-isopropylacrylamide)Francoise M. Winnik, H. Ringsdorf, and J. VenzmerCite this: Macromolecules 1990, 23, 8, 2415–2416Publication Date (Print):April 1, 1990Publication History Published online1 May 2002Published inissue 1 April 1990https://pubs.acs.org/doi/10.1021/ma00210a048https://doi.org/10.1021/ma00210a048research-articleACS PublicationsRequest reuse permissionsArticle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorescence studies of hydrophobically modified poly(N-isopropylacrylamides)H. Ringsdorf, J. Venzmer, and F. M. WinnikCite this: Macromolecules 1991, 24, 7, 1678–1686Publication Date (Print):April 1, 1991Publication History Published online1 May 2002Published inissue 1 April 1991https://pubs.acs.org/doi/10.1021/ma00007a034https://doi.org/10.1021/ma00007a034research-articleACS PublicationsRequest reuse permissionsArticle...
Abstract The interplay between molecular self‐organization and recognition leads to the construction of functional supramolecular systems in which order mobility are combined whose function is based on their organization. These fascinating phenomena, for living cell a perfect example, can be understood only if wide range scientific disciplines work together. For this purpose, synthetic used simulate natural biomembrane processes. One example specific interaction membrane‐bound ligands...
Surfactants are widely used across the globe both in industrial and consumer products. The n-octanol/water partition ratio or coefficient (log Kow) distribution D) key parameters environmental risk assessment of chemicals as they often to estimate fate bioavailability thus exposure toxicity a compound. Determining log Kow data for surfactants is technical challenge due their amphiphilic properties. Currently several existing experimental OECD methods (e.g. slow-stirring, HPLC, solubility...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction of surfactants with hydrophobically-modified poly(N-isopropylacrylamides). 2. Fluorescence label studiesFrancoise M. Winnik, H. Ringsdorf, and J. VenzmerCite this: Langmuir 1991, 7, 5, 912–917Publication Date (Print):May 22, 1991Publication History Published online1 May 2002Published inissue 22 1991https://pubs.acs.org/doi/10.1021/la00053a017https://doi.org/10.1021/la00053a017research-articleACS PublicationsRequest reuse...
This study is devoted to the experimental and theoretical investigation of aerodynamic drop breakup phenomena. We show that phenomena impact onto a rigid wall, binary collisions, deformation are similar if correct scaling applied. Then we use observations deforming estimate evolution film thickness bag, value determines size fine child drops produced by bag breakup. prediction thickness, based on kinematics, validated for initial stage direct measurements at latest data obtained from...
The thermoreversible coil-globule transition of polymers at the lower critical demixing temperature is a popular theme in polymer chemistry. Here, this phenomenon exploited to induce reversible contraction/expansion by changes membrane-achored N-isopropylacrylamide copolymer (shown schematically below). With liposome-anchored "molecular accordion" dynamics cytoskeleton biological systems can be roughly simulated.
In this paper, we comparatively investigated the wetting performance of aqueous surfactant solutions in a wide range concentrations, including conventional ionic surfactants (CTAB, SDS) and two nonionic polyether-modified trisiloxane (TSS6/3, TSS10/2), over hydrophobic polypropylene substrates. all cases, scaling analysis experimental data spreading drops showed that early stage was dominated by inertia duration not influenced addition surfactant. For solutions, only observed...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBis(1-pyrenylmethyl) ether as an excimer-forming probe of hydrophobically modified poly(N-isopropylacrylamides) in waterFrancoise M. Winnik, Mitchell A. H. Ringsdorf, and J. VenzmerCite this: Phys. Chem. 1991, 95, 6, 2583–2587Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March 1991https://pubs.acs.org/doi/10.1021/j100159a087https://doi.org/10.1021/j100159a087research-articleACS...
Abstract Das Zusammenspiel von molekularer Selbstorganisation und Erkennung führt zum Aufbau funktionellen supramolekularen Systemen, in denen Ordnung Beweglichkeit kombiniert sind deren Funktion auf ihrer Organisation beruht. Diese faszinierenden Phänomene – die lebende Zelle ist bislang perfekteste Ausführung nur im Zusammenwirken verschiedener Bereiche unserer Wissenschaften zu verstehen. Mit synthetischen Systemen lassen sich natürliche Biomembranprozesse wie spezifische...
In spite of the numerous studies dealing with interaction between lipid membranes and surfactants at subsolubilizing membrane concentrations, quantifying detailed bilayer structure, as for instance pore formation, on phospholipid bilayers upon addition single chain lipids continues to be a challenge. Herein, we analyze effects lysophosphatidylcholine (18 : 1 LPC or lysolipid) soybean phosphatidylcholine (SPC) extruded liposomes, where vesicles containing additional exhibit approximately 10%...
Spreading of water drops resting in equilibrium on polypropylene surfaces was initiated by dispensing surfactant-laden droplets their apex. Upon contact the two processes were kicked-off: surfactant from spread along water/air interface sessile and a train capillary waves propagated drops. The line remained initially pinned started spreading only when reached it while did not have an apparent effect initiating drop spreading. However, influenced propagation velocity waves. Though dynamics...
Abstract The lipid bilayers of cell membranes are usually connected to two types biopolymers: the cytoskeleton and glycocalix. These structures not only responsible for stabilization bilayer, they also alter surface properties cells. Among various attempts mimick membrane using polymeric systems( 1 ), one method is fixation amphiphilic polymers via hydrophobic anchor groups bilayers. In experiments reported here influence on morphology giant unilamellar liposomes has been investigated....
The aim of our work was to study the structure a typical modern cosmetic oil-in-water emulsion (o/w-emulsion), based on emulsifier polyglyceryl-3 dicitrate/stearate and glycerylstearate/stearyl alcohol as consistency enhancer. We have used systematic approach building up step by step, characterizing all systems using Small Angle Neutron Scattering (SANS), Differential Scanning Calorimetry (DSC), Freeze Fracture Transmission Electron Microscopy (FF-TEM), light microscopy rheology. starting...
Nanofluids hold promise for a wide range of areas industry. However, understanding the wetting behavior and deposition formation in course drying spreading nanofluids, particularly containing surfactants, is still poor. In this paper, evaporation dynamics quantum dot-based nanofluids evaporation-driven self-assembly nanocolloidal suspensions on hexamethyldisilazane-, polystyrene-, polypropylene-coated hydrophobic surfaces have been studied experimentally. Moreover, very first time, we make...
Vesicles have recently found widespread use in applications such as conditioning of textiles, paper and hair, well transdermal drug delivery. The mode treatment several cases involves the application droplets aqueous dispersions vesicles onto dry porous substrates like textiles. One factors which affects performance treatments is rate at spread imbibe on substrate. Depending upon specific purpose either a fast or slow droplet spreading kinetics could be desired. Therefore, it important to...