Naslov
Interactions between poly(L-lysine) and poly(L-glutamic acid) in solution and at interfaces

Autori
Nakić, Natali ; Salopek, Jasmina ; Selmani, Atiđa ; Dutour Sikirić, Maja ; Kovačević, Davor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
27th Conference of European Colloid and Interface Society (ECIS 2013) : abstracts / - , 2013, Xx-xx

Skup
Conference of European Colloid and Interface Society (27 ; 2013)

Mjesto i datum
Sofija, Bugarska, 01.09.2013. - 07.09.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
interactions ; poly(L-lysine) ; poly(L-glutamic acid) ; polyelectrolyte complexes

Sažetak
Mixing aqueous solutions of positively and negatively charged polyelectrolytes results in the formation of polyelectrolyte complexes, predominantly due to the electrostatic interactions between oppositely charged chains. The formation of such complexes is influenced by the presence of various supporting electrolytes and by ionic strength. On the other hand, it is known that same factors significantly influence the process of formation and erosion of polyelectrolyte multilayers obtained by alternatingly dipping a substrate into, or flushing with, solutions that contain the negative and the positive polyelectrolyte, respectively. The influence of different salts as well as the effect of titration direction on polyelectrolyte complexes formed by mixing aqueous solutions of poly(L-lysine hydrobromide) (PLL) and poly(L-glutamic acid) (PGA) was investigated at t = 25 ºC and at ionic strength Ic = 0.001 mol dm-3. The methods used for the investigation of complex formation were conductometry and electrophoretic light scattering (i.e. zeta potential and particle size measurements). The obtained results were compared with results obtained by investigating the effects of salts on multilayer formation process. These experiments were based on alternate adsorption of same components (PLL and PGA) on silica using stagnation point optical reflectometry method. The comparison with various literature data was also performed. It has been shown that the behavior of polyelectrolyte complexes in solution is governed by the same principles as that of corresponding polyelectrolyte multilayers formed on metal oxides.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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