The paper reports new hydrogels based on quaternary ammonium salts of chitosan designed as biocidal products. derivative was crosslinked with salicylaldehyde via reversible imine bonds and supramolecular self-assemble to give dynamic which respond environmental stimuli. crosslinking mechanism demonstrated by 1H NMR FTIR spectroscopy, X-ray diffraction polarized light microscopy. hydrogel nature, self-healing thixotropy were proved rheological investigation visual observation, their...

The formation of supramolecular bottle-brush polymers consisting a noncovalent backbone assembled through directional hydrogen bonds and poly(isobutylene) (PIB) side-chains was investigated in cyclohexane by light scattering. Two limiting cases were observed depending on the balance between favorable unfavorable stretching PIB chains within bottle-brushes, agreement with theoretical model developed Wang et al. On one hand, bisurea self-assembling unit able to form four cooperative per...

A triblock poly(2-methacryloyloxyethyl acrylate)-b-poly(ethylene oxide)-b-poly(2-methacryloyloxyethyl acrylate) (PMEA-b-PEO-b-PMEA) copolymer bearing polymerizable groups on the hydrophobic blocks was synthesized and self-assembled in water. The transient micellar structures formed selective solvent were permanently fixed by cross-linking methacrylate moieties micelles cores under UV light. obtained after characterized static dynamic light scattering (SLS DLS), size exclusion chromatography...

Abstract Block copolymers based on poly(vinylidene fluoride), PVDF, and a series of poly(aromatic sulfonate) sequences were synthesized from controlled radical polymerizations (CRPs). According to the aromatic monomers, appropriate techniques CRP chosen: either iodine transfer polymerization (ITP) or atom (ATRP) PVDF‐I macromolecular chain agents (CTAs) PVDF‐CCl 3 macroinitiator, respectively. These precursors produced by ITP VDF with C 6 F 13 I telomerization chloroform, Poly(vinylidene...

Asymmetric poly(ethylene oxide)-b-poly(ethyl acrylate) block copolymers bearing polymerizable (meth)acrylate groups at the end of hydrophobic were synthesized and self-assembled in water. The micellar structures studied by static light scattering (SLS), dynamic (DLS) small angle neutrons (SANS). micelles checked to be dynamical a thermodynamic equilibrium. In order stabilize micelles, photoinitiator was added UV applied initiate cross-linking cores. Light SANS showed very weak influence...

Poly(ethylene oxide)-b-poly(ethyl acrylate) amphiphilic diblock copolymers were synthesized by atom transfer radical polymerization (ATRP). The controlled character of the was confirmed kinetic studies, evolution number-average molecular weight and polydispersity index with conversion. Various block different PEA/PEO molar ratio their self-assembling properties in aqueous medium studied fluorescence measurements, static light scattering (SLS), dynamic (DLS). critical micelle concentrations...

It is shown how interpenetrated polymer networks can be formed by self-assembly in water of two different amphiphilic triblock copolymers, which preserve and combine the properties stimuli-responsiveness each polymer. Aqueous solutions a pH UV-sensitive copolymer spontaneously self-assembled network when mixed. The polymers were based on poly(acrylic acid) poly(ethylene oxide), respectively, had hydrophobic end blocks. structure mixed was studied with light scattering dynamic mechanical...

For the first time, polymersomes were obtained by self-assembly in water of amphiphilic grafted glycopolymers based on dextran polysaccharidic backbone and polymeric liquid crystal grafts (poly(diethylene glycol cholesteryl ether acrylate), PDEGCholA). After measuring properties these term surfactancy, influence their structural parameters self-assemblies once dispersed was investigated static dynamic light scattering cryogenic transmission electron microscopy (cryo-TEM). Based results, a...

Atomistic simulations of two isomers polybutadiene (PB), cis-1,4-PB and 1,2-PB, have been conducted using the end-bridging Monte Carlo algorithm. The maximum mean molecular lengths polymer chains were C1000 C161 for respectively. simulated ensembles configurations evaluated in terms equilibration rate conformational, volumetric, structural properties. results illustrate correlation between successful end-bridging, reptation, concerted rotation (CONROT) moves enhanced large systems with long...

We report on the introduction of small organic hydrophilic molecules (fluorescein, rhodamine B, and two coumarin-based dyes) in multilayers strong polyelectrolytes, studied by X-ray reflectometry, UV/visible spectroscopy, fluorescence measurements. Very low diffusion coefficients (about 10-17 cm2·s-1) were found for inward fluorescein preformed multilayers. In addition, was accompanied substantial variations thickness multilayer (up to 300%), ruling out practical significance as a tool dope...

Poly(ethylene oxide) (PEO) end capped with an alkyl group is a highly asymmetric diblock copolymer that forms spherical micelles in aqueous solution resembling multiarm star polymers. The effect of varying the length on structure and viscoelasticity was investigated for pure mixed micelle suspensions. aggregation number (p) increased critical association concentration (CAC) decreased increasing group. At high concentrations discontinuous reversible liquid-solid transition observed below...

Abstract In this study, the polymerization of (2‐hydroxyethyl) acrylate (HEA), in polar media, using Cu(0)‐mediated radical also called single‐electron transfer–living (SET‐LRP) is reported. The kinetics aspects both homopolymerization and copolymerization from a poly(ethylene oxide) (PEO) macroinitiator were analyzed by 1 H NMR. effects ligand solvent studied. was shown to reach very high monomer conversions proceed well‐controlled fashion presence tris[2‐(dimethylamino)ethyl]amine Me6‐TREN...

Poly(ethylene oxide) (PEO) was end-capped with short poly(methacryloyloxyethyl acrylate) (PMEA) chains. In aqueous solutions the end-blocks self-assembled, leading to flower-like polymeric micelles at low concentrations that associated through bridging higher concentrations. Above a critical percolation concentration (Cp) system-spanning transient network formed. The self-assemblies were locked-in in situ by UV irradiation which caused photo-cross-linking of PMEA blocks. structure and...

Abstract Janus cylinders are one-dimensional colloids that have two faces with different compositions and functionalities, useful as building blocks for advanced functional materials. Such anisotropic objects difficult to prepare nanometric dimensions. Here we describe a robust versatile strategy form micrometer long nanorods diameters in the 10-nanometer range, by self-assembly water of end-functionalized polymers. The topology is not result phase segregation incompatible polymer arms, but...

Macroporous hydrogels have great potential for biomedical applications. Liquid or gel-like pores were created in a photopolymerizable hydrogel by forming water-in-water emulsions upon mixing aqueous solutions of gelatin and poly(ethylene oxide) (PEO)-based triblock copolymer. The copolymer constituted the continuous matrix, which dominated mechanical properties once photopolymerized. dispersed phase, macropores hydrogel. microstructures porous determined volume fraction phase. When fractions...

Long and robust NDI-containing nanocylinders formed by supramolecular self-assembly <italic>via</italic> hydrogen bonds aromatic interactions in aqueous medium.

The formation of polystyrene (PS) supramolecular bottle-brushes by self-assembly in cyclohexane hydrogen-bonding tris(urea) units decorated PS chains was investigated using light and neutron scattering. Atom transfer radical polymerization (ATRP) used to control the length side-chains allowed straightforward synthesis targeted tris(urea)s. It shown that their extent strongly depended on degree chemical nature polymer side chains, contrast with what previously observed cyclic oligopeptides,...

Atmospheric pressure plasma jets (APPJ) have great potential in wound healing, bacterial disinfection and cancer therapy. Recent studies pointed out that hydrogels can be used as screens during APPJ treatment, or even reservoirs for reactive oxygen nitrogen species generated by liquids. Thus, novel applications are emerging which deserve fundamental exploration of the possible modifications undergone polymers solution due to reactivity with plasmas. Here we investigate occurred treatment an...

Janus nanocylinders exhibit nanometric dimensions, a high aspect ratio, and two faces with different chemistries (Janus character), making them potentially relevant for applications in optics, magnetism, catalysis, surface nanopatterning, or interface stabilization, but they are also very difficult to prepare by conventional strategies. In the present work, were prepared supramolecular coassembly water of polymers functionalized complementary assembling units. The originality our approach...