We have applied a continuum self-consistent field (SCF) theory to flexible polyelectrolytes on flat surfaces which are either uncharged or carrying the opposite charge as the polyelectrolytes. We examined in detail the effects of various parameters on the polyelectrolyte adsorption and surface charge compensation by the adsorbed polyelectrolytes. The ground-state dominance approximation (GSDA) ...

We have developed a statistical theory for columnar aggregates of semi-flexible polyelectrolytes. The applicability of previous, simplified theories was limited to polyelectrolytes with unrealistically high effective charge and, hence, with strongly suppressed thermal undulations. To avoid this problem, we utilized more consistent approximations for short-range image-charge forces and steric co...

We tested the hypothesis that the level of protein adsorption onto polyelectrolyte multilayers (PEMs) is influenced by the chain stiffness of the polymers forming the multilayer. The implication being that by altering the chain stiffness, PEMs can be formed that promote or inhibit protein adsorption. Protein adsorption to PEMs consisting of flexible and semi-flexible polyelectrolytes was invest...

Multilayer thin films prepared from weak polyelectrolytes can exhibit a rich suite of anomalous physicochemical properties. One of the major factors that influence the properties of such films is the acid/base chemistry of the weak functional groups of the polyelectrolytes. In fact, the apparent dissociation constants of weak polyelectrolytes can shift by as much as 1–4 pH units upon incorporat...

Multilayers with low charge density polyelectrolytes assembled on thin films of cellulose were studied by piezoelectric microgravimetry. The substrates were produced from colloidal suspensions of cotton fibers before and after modification with cationic and anionic groups via epoxy intermediates of quaternary ammonium and carboxymethylation, respectively. Two different levels of ionicity were u...

This thesis presents a study of the in-situ precipitation of polyelectrolytes during droplet impacts and its applications in enhancing the retention efficiency of sprays. Large amounts of agricultural sprays are wasted worldwide, due to the poor retention on hydrophobic plants. As the harmful effects of pesticides in particular are more and more pointed out, there is an increasing pressure to r...

The interaction of polymers having the characteristics of synthetic or natural, biocompatible and biodegradable polyelectrolytes with biomolecules exhibits the presence of biologically important mechanisms and has a great importance for biomedical uses. Researches about artificial immunization systems are still continuing thanks to the adjuvant effect which stimulates the immunity and which is ...

Many biomaterials exhibit pronounced swelling and consequently pronounced porous structure when exposed to water. Characterization and tuning of the porosity are important for the fundamental understanding of the behaviour of the biomaterials as well as for many of their applications, both traditional and novel. Here, the porous structure of cellulosic fibres (chemical wood pulp) was analysed i...

Abstract There are so many significant developments made in drug delivery system (DDS) which Polymer DDS has reached great developments. The main motive of this paper is to focus on developing by Polyelectrolytes. Polymers have achieved much importance DDS. Polyelectrolytes shows an exceptional category polymer compounds containing opposite charged polyions mainly cationic or anionic charges; t...