Abstract Novel quaternized polysulfones (PSFs) with two ionic chlorine contents were investigated, namely, their morphology and antimicrobial activity. Atomic force microscopy (AFM) studies on membranes showed ordered domains, in which pores nodules of different sizes intensities distributed. The charge density the PSFs history formed from solutions solvent/nonsolvent mixtures influenced aspects surface images. adhesion Escherichia coli ATCC 10536 Staphylococcus aureus ATCCC 6538...

The progress achieved in recent years the biomedical field justifies objective evaluation of new techniques and materials obtained by using silver different forms as metallic silver, salts, nanoparticles. Thus, antibacterial, antiviral, antifungal, antioxidant, anti-inflammatory activity nanoparticles (AgNPs) confers to newly characteristics that make them ideal candidates a wide spectrum applications. In present study, use hydroxypropyl methyl cellulose (HPMC) formulation, embedding AgNPs...

Quaternized polysulfones with different ionic chlorine content tested for biomedical applications were obtained by quaternization reaction of chloromethylated N,N-dimethylethanolamine. The relationship between the physical and chemical characteristics these polymers their biocompatible antimicrobial properties was established maximizing selectivity performance materials applications. Therefore, topographic reorganization polysulfonic films induced type nonsolvent in casting solutions polymer...

Abstract The conformational behavior and unperturbed dimensions of polysulfone chloromethylated with different degrees substitution were investigated by viscometry in N,N ‐dimethylformamide; we intended to use these results more complicated structures properties applications. effects concentration temperature on the coil densities chlorine content dimension parameters are discussed. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 524–531,

Some properties of polysulfone, chlorometylated polysulfone and quaternized were studied by viscometry, interferometry dialysis equilibrium. Modification intrinsic viscosity, preferential total adsorbtion coefficients explained the changes hydrodynamic dimensions with solvent quality. POLYM. ENG. SCI., 46: 827–836, 2006. © 2006 Society Plastics Engineers

A series of blends obtained from polysulfone ( PSF ) or chloromethylated CMPSF and poly(vinyl alcohol) PVA in N ‐methyl‐2‐pyrrolidone were investigated by means attenuated total reflection Fourier transform infrared FTIR spectroscopy, differential scanning calorimetry (DSC), rheology atomic force microscopy AFM ). Mechanisms through which specific interactions developed via hydrogen bonding ternary systems affect the blend properties established spectra. The results confirm presence / at 0.5...

Modification of intrinsic viscosity, temperature coefficient, and preferential adsorption coefficient polysulfones with different alkyl side groups in N,N-dimethylformamide/methanol N,N-dimethylformamide/water was investigated at compositions temperatures. The specific interactions, such as hydrogen bonding polyelectrolyte effect induced by an enhanced dissociation the ionizable groups, determine both modification solvation power polymer coil difference composition mixed solvent inside outside coil.

Modification of intrinsic viscosity and the preferential adsorption coefficients quaternized polysulfones with various contents ionic chlorine in N,N‐dimethylformamide/water methanol/water mixed solvents was investigated at different compositions temperatures. The polyelectrolyte effect induced by an enhanced dissociation ionizable groups determines both modification swelling degree polymer coil difference composition solvent inside outside coil. results obtained were correlated interaction...

Siloxane polymers possess a unique set of properties that makes them highly suitable for optical applications. Our data present some these properties, namely refractivity, dielectric transmittance characteristics, and flexibility, variety poly(dimethylsiloxane)s obtained by equilibrium ring-opening cationic polymerization anionic copolymerization. The study illustrates the importance such structural compositional characteristics in tailoring specific

The synthesis of cationic amphiphilic pullulan having dimethylaminopropyl groups was performed in dimethyl sulfoxide using N, N′-carbonyldiimidazole as activator. derivatives with three different substitution degrees were characterized by FTIR, 1 H and 13 C NMR, elemental analysis, conductometric titrations. aggregates characteristics determined steady-state fluorescence (critical aggregation concentration polarity) capillary viscometry measurements. Their behavior aqueous dilute semidilute...

Composite membranes based on a polymer mixture solution of quaternized polysulfone (PSFQ), cellulose acetate phthalate (CAP), and polyvinylidene fluoride (PVDF) for biomedical applications were successfully obtained through the electrospinning technique. To ensure membranes’ functionality in targeted applications, selection conditions was essential. Moreover, understanding geometric characteristics morphology fibrous is crucial designing them to meet performance standards necessary future...

Abstract Theoretical and experimental aspects on the specific interactions developed via electrostatic hydrogen‐bonding in a ternary system formed of proton‐donor solvent ( N,N ‐dimethylformamide or methanol), proton‐acceptor (water), quaternized polysulfone with various contents ionic chlorine, which indicates character, are investigated. Thus, systems corrected basis association phenomena defined through constants. Numerical values for these constants were evaluated as function...

Abstract Refractive index and specific refractive increments in N,N‐dimethylformamide of the polysulfone chlormethylated were determined experimentally by theoretical equations. The contribution ratio molar refraction, proportional to induced dipole moment, volume for different atoms present studied polymers optical properties was investigated. Keywords: propertiespolysulfones Acknowledgments authors thank Institute Atomic Physics Romania financial support this work a Grant Scientific...

Theoretical and experimental aspects of the association phenomena generated by hydrogen bonding, dispersive, electrostatic interactions in ternary systems consisting a proton-donor solvent (N,N-dimethylformamide or methanol), proton-acceptor (water), polymer (polysulfones with different alkyl side groups) are investigated. In this context, binary thermodynamic interaction parameters corrected on basis constants. Numerical values these constants were evaluated as function system composition,...