PDADMAC diallyldimethylammonium

Abstract Investigations of alternate adsorption regularities of cationic polyelectrolytes a) copolymer of styrene and dimethylaminopropyl-maleimide (CSDAPM) and b) poly(diallyldimethylammonium chloride) (PDADMAC) and anionic surfactant - sodium dodecyl sulfate (SDS) on fused quartz surface were carried out by capillary electrokinetic method. The adsorption/desorption kinetics, structure and properties of adsorbed layers for both polyelectrolytes and also for the second adsorbed layer were studied in dependence on different conditions molecular weight of polyelectrolyte, surfactant and polyelectrolyte concentration, the solution flow rate through the capillary during the adsorption, adsorbed layer formation... 

Cellulose sulfate (sodium) Poly(diallyldimethylammonium-chloride) (PDADMAC) [60]... 

Poly(diallyldimethylammonium chloride) (pDADMAC) [35, 36] has low UV absorption. Using pyridine as background and PEG200 as sieving medium analysis of standards in the molecular mass range from 56,000 to... 

Polyelectrolyte multilayers on silica colloids are investigated here using a combination of fast MAS and DQ solid-state NMR techniques. 2D DQ H NMR spectra of the bulk complex and the multilayer films are found to be similar, revealing complexation between the alternating layers of poly(sodium 4-styrenesulfonate) (PSS) and poly(diallyldimethylammonium chloride) (PDADMAC). 

We carried out potentiometric investigations with a Cl sensitive electrode [40] to determine the degree of conversion, i.e., the release of the low molecular counterions in the reactions between sodium poly(styrene sulfonate) (NaPSS) and poly(diallyldimethylammonium chloride) (PDADMAC) and its copolymers with acrylamide of various compositions (for synthesis and characterization of the samples see [41]). The basic idea of these studies on PEC formation is the change of the Cl ion activity coefficient due to the release of the counterions. According to Manning s theory [31], the activity coefficient of the counterions of a polyelectrolyte is given by... 

Poly (diallyldimethylammonium chloride)-copolyacrylate guanidines (PDADMAC-co-PAG),... 

In an early work by Petzold and Lunkwitz [9], this efficiency of recharging of the fibres using cationic complexes of poly(diallyldimethylammonium chloride), PDADMAC, and poly(maleic acid-co-a-methylstyrene), MS-a-MeSty, was used to flocculate cellulose fibres, but the actual adsorption of the complexes was not measured. The adsorption of anionic complexes of polyethyleneimine (PEI) and CMC on fibres pretreated with a cationic PDMDAAC has also been studied by Hubbe et al. [24]. These authors found that when the charge of the complexes was decreased there was an increase in adsorption, indicative of an electrosorption process, but the authors also detected signs of nonionic interaction although they were not able to establish the molecular reason for this behaviour. 

Mixing two oppositely charged PELs usually results in the separatimi of a nulky polymer-rich phase from a clear polymer-depleted phase. Given the task of preparing a PEL complex from standard PELs Uke poly(diallyldimethylammonium chloride) (PDADMAC) and polyfstyrenesulfonate) (PSS), one would expect a similar... 

Polyelectrolyte multilayers (PEMs) are very important materials due to having a wide range of application helds such as encapsulation of drugs and enzymes, membrane-based separations, antibacterial coatings, membrane reactors and fuel cells. Polyelectrolyte multilayer (PEM) has a wide range of transport properties, simple deposition and small thickness, so it can be used in separation membranes. Polyelectrolyte concentration, duration and temperature of adsorption, deposition and solution pH are key parameters for specific separations. In addition the number of poly electrolyte layers can alter the properties of poly electrolyte. Poly (styrene sulfonate) (PSS)/poly(diallyldimethylammonium chloride) (PDADMAC) films are utilized in separation membranes. The adsorption of Cu(II) or Fe(III) ions can be carried out with PSS/poly(allylamine hydrochloride) (PAH) membranes. 

Many naturally occurring polymers, such as collagen, fibrinogen, hyaluronic acid, chitosan and heparin, have been used to make hybrid hydrogels with synthetic polymers, such as PEG, PNIPAm and PVA [31-35]. The hybridization can be performed by covalent bonding or physically interactions. For example, the IPN hydrogel composed of sodium alginate (SA) and poly(diallyldimethylammonium chloride) (PDADMAC) exhibited pH and electrical sensitive behavior [36]. 

Poly(diallyldimethylammonium chloride) (PDADMAC) and ferri-/ferrocyanide show a similar behavior [233]. In most cases, the ferri-/ferrocyanide (trivalent/ tetravalent hexacyanoferrate[lll]/[ll]) couple exhibits an unexpected interaction pattern with strong cationic polyelectrolytes. Hereby, the trivalent ferricyanide favors complexation compared with the tetravalent ferrocyanide [234, 235]. Although the higher charged ferrocyanide is supposed to release a higher number of monovalent counterions, this entropic contribution is less dominant for the ferrocyanide. This conclusion was derived from entropy measurements [232], clearly emphasizing the enthalpic repulsion between the highly hydrated, weakly polarizable ferrocyanide and the somewhat hydrophobic polymeric backbone [236]. This leads to pronounced ion-specific effects. In contrast, some systems... 

Malaisamy et al. [ 119] showed that the magnitude of the zeta potential increased with an increase in the number of bilayers on the surface of composite PA membranes modified by the LbL method with PSS/poly(diallyldimethylammonium chloride) (PDADMAC). It was also found that the positive or negative sign of the zeta potential of the membranes was dependent on the last poly electrolyte layer on top of the membrane surface. Thus, by controlling the type of final polyelectrolyte layer and the number of bilayers, the membrane zeta potential, and thus separation performance and antifouling suitability of the membranes, can be controlled. 

---