نتایج جستجو برای: polyelectrolyte

تعداد نتایج: 3801  

Journal: :The journal of physical chemistry. B 2006
Junhwan Jeon Andrey V Dobrynin

Complexation between polyelectrolyte and polyampholyte chains in poor solvent conditions for the polyelectrolyte backbone has been studied by molecular dynamics simulations. In a poor solvent a polyelectrolyte forms a necklace-like structure consisting of polymeric globules (beads) connected by strings of monomers. The simulation results can be explained by assuming the existence of two differe...

2001
Yingjie Li

Dynamic light scattering, static light scattering, and turbidimetry were used to investigate the effect of polyelectrolyte molecular weight and concentration on complex formation between a strong polyelectrolyte, poly(dimethyldially1ammonium chloride) (PDMDAAC), and oppositely charged mixed micelles of Triton X-100 (TX100) and sodium dodecyl sulfate (SDS). The hydrodynamic radius (Rh) of the co...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2011
Martin F Haase Dmitry Grigoriev Helmuth Moehwald Brigitte Tiersch Dmitry G Shchukin

The affinity of weak polyelectrolyte coated oxide particles to the oil-water interface can be controlled by the degree of dissociation and the thickness of the weak polyelectrolyte layer. Thereby the oil in water (o/w) emulsification ability of the particles can be enabled. We selected the weak polyacid poly(methacrylic acid sodium salt) and the weak polybase poly(allylamine hydrochloride) for ...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2005
Gregory M Gratson Jennifer A Lewis

Three-dimensional (3-D) structures with micron-sized features have been fabricated via the direct-write assembly of polyelectrolyte inks. By mixing oppositely charged species under solution conditions that promote polyelectrolyte exchange reactions, we have created concentrated fluids capable of flowing through microscale deposition nozzles. Ink deposition into an alcohol/water coagulation rese...

Journal: :Journal of Chemical Physics 2021

Hybrid modeling approaches based on all-atom force fields to handle a solute and coarse-grained models account for the solvent are promising numerical tools that can be used understand properties of large multi-components solutions thus speed up development new industrial products obey standard green sustainable chemistry. Here, we discuss ability full polarizable hybrid approach coupled molecu...

Journal: :International Journal of Technology: IJ Tech 2021

Polyelectrolyte complexes (PECs) are attractive materials for drug delivery application as they offer simple preparations and high drug-loading efficiency. In this study, a novel method preparing polyelectrolyte complex nanoparticles using s

2010
Irina Marchenko Alexey Yashchenok Olga Inozemtseva Dmitry Gorin Helmuth Mohwald

Assembling polyelectrolyte multilayers in a bottom-up approach is reported for polymers, particles, nanoparticles, and carbon nanotubes. Effects of polyelectrolyte multilayers on evaporative self-assembly of particles, which are of interest to a number of applications including photonic crystals, films and substrates, are investigated. Polyelectrolyte multilayer coatings bring multifunctionalit...

2003
Jean-Francois Joanny Martin Castelnovo

In this chapter, we review our recent theoretical work on the formation of polyelectrolyte multilayers. The first layer is obtained by polyelectrolyte adsorption on a surface with an opposite charge. The adsorbed polyelectrolyte charge is sufficient to invert the charge of the surface. Each subsequent layer is bound to the previous one by the formation of a polyelectrolyte complex. Using a Deby...

Journal: :Soft matter 2015
Nan K Li William H Fuss Lei Tang Renpeng Gu Ashutosh Chilkoti Stefan Zauscher Yaroslava G Yingling

Self-assembly processes of polyelectrolyte block copolymers are ubiquitous in industrial and biological processes; understanding their physical properties can also provide insights into the design of polyelectrolyte materials with novel and tailored properties. Here, we report systematic analysis on how the ionic strength of the solvent and the length of the polyelectrolyte block affect the sel...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2003
Junhwan Jeon Andrey V Dobrynin

We present the results of Monte Carlo simulations of complexation between polyampholyte and polyelectrolyte chains. Polymers are modeled as bead-spring chains of charged Lennard-Jones particles each consisting of 32 monomers. Formation of a polyampholyte-polyelectrolyte complex is driven by polarization-induced attractive interactions. The complex is usually formed at the end of the polyelectro...

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