A5076719382- Polymer Surface Interaction Studies
- Surfactants and Colloidal Systems
- Electrostatics and Colloid Interactions
- Advanced Polymer Synthesis and Characterization
- Proteins in Food Systems
- Pickering emulsions and particle stabilization
- Material Dynamics and Properties
- Force Microscopy Techniques and Applications
- Surface Modification and Superhydrophobicity
- Hydrogels: synthesis, properties, applications
- Supramolecular Self-Assembly in Materials
- Dendrimers and Hyperbranched Polymers
- Nanoparticle-Based Drug Delivery
- Microfluidic and Capillary Electrophoresis Applications
- Silk-based biomaterials and applications
- Block Copolymer Self-Assembly
- Supramolecular Chemistry and Complexes
- Rheology and Fluid Dynamics Studies
- Polysaccharides Composition and Applications
- Bacteriophages and microbial interactions
- Lipid Membrane Structure and Behavior
- Adhesion, Friction, and Surface Interactions
- Enhanced Oil Recovery Techniques
- Molecular Junctions and Nanostructures
- Microencapsulation and Drying Processes
State Key Laboratory of Chemical Engineering
2017-2025
East China University of Science and Technology
2017-2025
Wageningen University & Research
2013-2024
State Council of the People's Republic of China
2019-2021
University of Twente
2006-2018
Beijing National Laboratory for Molecular Sciences
2010
State Key Laboratory for Structural Chemistry of Unstable and Stable Species
2010
University of Groningen
2005-2010
University Medical Center Groningen
2007-2010
Peking University
2010
Sequential addition of anionic and cationic polyelectrolytes may lead to the formation multilayers at a solid surface. The buildup such is characterized by stepwise increase adsorbed amount layer thickness alternating highly positive negative values for ζ-potential. prime variables which determine stability these structures are polymer charge ionic strength. Very stable formed when both polymers charged strength low. For weakly complexation surface first occur, followed desorption complexes....
When oppositely charged polyelectrolytes are mixed below a critical salt concentration, their mixtures show macroscopic phase separation into dilute and dense, polyelectrolyte complex phase. Binodal compositions of the complexes have been measured experimentally using fluorescently labeled polyelectrolytes. We used fluorescein-labeled poly(acrylic acid) (PAA) four different chain lengths (N = 20, 50, 150, 510) to determine binodal PAA poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA)...
Underwater adhesion is crucial to many marine life forms living a sedentary lifestyle. Amongst them, mussel has been mostly studied, which inspires numerous investigations of 3,4-dihydroxyphenylalanine (DOPA)-based organic adhesives. In contrast, reef-building oysters represent another important "inorganic" strategy molluscs for by generating biomineralized organic–inorganic adhesives, still rarely studied and no synthetic analogues have ever reported so far. Here, novel type oyster-inspired...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamics of wetting: effects surface roughnessA. M. Cazabat and A. Cohen StuartCite this: J. Phys. Chem. 1986, 90, 22, 5845–5849Publication Date (Print):October 1, 1986Publication History Published online1 May 2002Published inissue 1 October 1986https://pubs.acs.org/doi/10.1021/j100280a075https://doi.org/10.1021/j100280a075research-articleACS PublicationsRequest reuse permissionsArticle Views2205Altmetric-Citations208LEARN ABOUT THESE...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrodynamic thickness of adsorbed polymer layersM. A. Cohen Stuart, F. H. W. Waajen, T. Cosgrove, B. Vincent, and L. CrowleyCite this: Macromolecules 1984, 17, 9, 1825–1830Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Published inissue 1 September 1984https://pubs.acs.org/doi/10.1021/ma00139a035https://doi.org/10.1021/ma00139a035research-articleACS PublicationsRequest reuse permissionsArticle...
Micelles are commonly regarded as colloidal structures spontaneously formed by amphiphilic molecules, that is, molecules consisting of two distinct parts which one is soluble and the other insoluble. This definition too restrictive: kinds can also form micelles. We report on formation micelles from a mixture (water-soluble) polyanion diblock copolymer with entirely water-soluble blocks: cationic neutral. The block forms complex coacervate poly(acrylic acid); neutral serves stablizing block,...
Complex coacervation core micelles were prepared with various polyelectrolytes and oppositely charged diblock copolymers. The copolymers consist of a block water-soluble neutral block. Our experimental technique was dynamic light scattering in combination titrations. At mixing ratios where the excess charge polyelectrolyte mixture is approximately zero, may be formed. colloidal stability these depends on lengths molecular weight homopolymers. In addition, chemical nature corona blocks ionic...
Abstract In many cases, polymer adsorption is studied by measuring isotherms. Quite often it found that the results are at variance with theoretical predictions. However, usually these isotherms interpreted in terms of a single polymeric solute. Most polymers used experimental studies polydisperse and should be treated as mixtures. It well established larger molecules such mixtures adsorb preferentially over smaller ones. this paper we show discrepancies between theory experiment (e.g.,...
In this Letter we show that in the rheology of electrostatically assembled soft materials, salt concentration plays a similar role as temperature for polymer melts, and strain rate solids. We rescale linear nonlinear rheological data set model electrostatic complexes at different concentrations to access range time scales is otherwise inaccessible. This provides new insights into relaxation mechanisms complexes, which rationalize terms microscopic mechanism underlying salt-enhanced activated...
Complex coacervation is the associative phase separation in a solution of positively and negatively charged macroions. Despite widespread use e.g. micellar assemblies (complex coacervate core micelles), drug carriers thin films, there virtually no experimental data on interfacial tension between such phases (polyelectrolyte complexes) their coexisting aqueous or influence salt thereon. In this paper we colloidal probe AFM measurements capillary adhesion forces to obtain complex two...
Asymmetric disk-shaped Janus micelles form spontaneously and reversibly when simple water-soluble diblock copolymers in aqueous solutions are mixed. The combination of associative segregative phase separation within one nanostructure results a micelle with complex coacervate core an asymmetric water-swollen corona which is microphase-separated into two distinct domains or faces.
Two flexible, oppositely charged polymers can form liquid-like complex coacervate phases with rich but poorly understood viscoelastic properties. They serve as an experimental model system for many biological and man-made materials made from macromolecules. We use rheology to systematically study the properties a function of salt concentration, chain length, length matching, mixing stoichiometry coacervates poly(N,N-dimethylaminoethyl methacrylate), PDMAEMA, poly(acrylic acid), PAA. The...