Polyallylamine hydrochloride PAH

Serizawa and Akashi [95] analyzed the monolayer adsorption of polystyrene latex particles with cationic polyvinylamine grafted on their surface, while Serizawa et al. [96,97] used commercial anionic latex particles. Both types of particles were adsorbed on polyelectrolyte-coated substrates previously prepared by alternating adsorption of cationic and anionic polyelectrolytes such as polyallylamine hydrochloride (PAH) and polystyrene sulfonate sodium salt (PSS) according to the method described by Decher [164]. Using... 

We used polyelectrolyte multilayer formed from polyallylamine hydrochloride (PAH) and PSS successfully for templating deposition of colloidal particles, as displayed in Fig. 12. The wavelength of the wrinkles was adjusted by the number of polyelectrolyte deposition cycles and, accordingly, single lines of particles or double lines, as well as other geometries, could be achieved [70],... 

PMMA itself does not possess ready-to-use fiinctional groups for covalent binding with biological molecules. The amine-terminated PMMA were often produced by immersing the freshly cleaned PMMA substrate into a 1.0 M ethylenediamine in dimethyl sulfoxide (DMSO) solution for 15 min at room temperature (115) or coated with a thin layer of polyethyleneimine (PEI) or polyallylamine hydrochloride (PAH). This was first treated in 1 N sodium hydroxide (NaOH) solution at 55 C for 30 min and then immersed in a PEI or PAH solution (0.2%, pH 7) at room temperature for 1 h (117). Tsai and Lin (2005) demonstrated that PEI-derivatized PMMA was used for the determination of alpha-fetoprotein by quartz crystal microbalance (QCM) (118). Furthermore, the amine-terminated PMMA could be generated by reacting with 10% hexamethylene diamine (HMD) (reaction shown in scheme 8.2) or 1,3-diaminopropane (DAP) in 100 mM borate buffer pH 11.5 for 2 h (119) or exposing to -lithioethylenediamine (120) (reaction shown in scheme 8.3). 

Capsule Permeability The most widely characterized polyelec-trol3 es in the formation of hollow capsules have been alternating layers of polystyrenesulphonate (PSS, negative) and polyallylamine hydrochloride (PAH, positive), and therefore the following permeability discussion will be based on that system. (PAH/PSS) will refer to a film of n bilayers. 

It has been shown [17] that the removal of the excess cationic polyelectrolyte led to a somewhat greater adsorption of complexes of polyallylamine hydrochloride (PAH) and polyacryhc acid (PAA) onto Si02 surfaces in water, with a net cationic charge and a degree of neutralization of 0.8, since the excess PAH diffused more rapidly to the surface and was adsorbed before the larger colloidal complexes could be adsorbed. When the PAH was removed, the complex adsorption dominated and the adsorbed amount thus increased. Similar results were found for the adsorption of cationic lattices onto cellulose fibres with an excess of cationic polyelectrolyte in solution [18], where it was found that a large excess of the cationic polyelectrolyte severely affected the amount adsorbed. Both these results show that the amount of free cationic polyelectrolyte in solution must be controlled in order to safely elucidate the mechanisms behind the adsorption of PEC onto any surface. 

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