Influence of Solution pH on the Nanostructure of Adsorption Layer of Selected Ionic Polyamino Acids and Their Copolymers at the Solid-Liquid Interface
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Polymers adsorption at the solid–liquid interface is a very sophisticated process depending on various factors, but at the same time this phenomenon finds numerous applications in many industrial branches as well as in human activities (Wiśniewska et al. React Funct Polym 72:791–798, 2012). The interactions between the adsorbent and the particular copolymer blocks are decisive for macromolecular substance binding on the solid particles surface. The structure of the polymer adsorption layer formed at the solid–liquid interface also depends on the forces present between the segments belonging to different macromolecules. As a result, complex aggregates may be formed on the solid surface (Louget et al. J Colloid Interface Sci 359:413–422, 2011). Additionally, the key role in the ionic copolymers adsorption phenomena is played by the solution pH, which affects the binding mechanism (Hoogeveen et al. Faraday Discuss 98:161–172, 1994).
The solution pH impact on the adsorption process of the block copolymers on the colloidal silica surface was investigated. All polymeric chains consist of the poly(ethylene glycol) (PEG) fragment and the suitable ionic polyamino acid segment (poly-L-lysine or poly-L-aspartic acid). Despite different polymer chain structures, the analyzed substances are characterized by similar molecular weight.
- 11.Katsnelson BA, Privalova LI, Sutunkova MP, Gurvich VB, Loginova NV, Minigalieva IA, Kireyeva EP, Shur VY, Shishkina EV, Beikin YB, Makeyev OH, Valamina IE (2015) Some inferences from in vivo experiments with metal and metal oxide nanoparticles: the pulmonary phagocytosis response, subchronic systemic toxicity and genotoxicity, regulatory proposals, searching for bioprotectors (a self-overview). Int J Nanomedicine 10:3013–3029CrossRefGoogle Scholar
- 14.Kumagai M, Imai Y, Nakamura T, Yamasaki Y, Sekino M, Ueno S, Hanaoka K, Kikuchi K, Nagano T, Kaneko E, Shimokado K, Kataoka K (2007) Iron hydroxide nanoparticles coated with poly(ethylene glycol)-poly(aspartic acid) block copolymer as novel magnetic resonance contrast agents for in vivo imaging. Colloids Surf B Biointerfaces 56:74–181CrossRefGoogle Scholar
- 20.Studenovská H, Vodicka P, Proks V, Hlucilová J, Motlík J, Rypácek F (2010) Synthetic poly(amino acid) hydrogels with incorporated cell-adhesion peptides for tissue engineering. J Tissue Eng Regen Med 4:454–463Google Scholar
- 27.Janusz W (1999) Electrical double layer at metal oxide-electrolyte interface in “interfacial forces and fields theory and applications”. M. Dekker, New YorkGoogle Scholar