A Comparison of Interpolyelectrolyte Complexes (IPECs) Made from Anionic Block Copolymer Micelles and PDADMAC or q-Chitosan as Polycation
| Autor: | Özge Azeri, Dennis Schönfeld, Bin Dai, Uwe Keiderling, Laurence Noirez, Michael Gradzielski |
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| Přispěvatelé: | Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
[PHYS]Physics [physics]
Polymers and Plastics ionic assembly interpolyelectrolyte complexes atom transfer radical polymerization (ATRP) General Chemistry small angle neutron scattering small angle neutron scattering (SANS) atom transfer radical polymerization interpolyelectrolyte complexes (IPECs) amphiphilic copolymers chitosan [CHIM]Chemical Sciences 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften |
| Zdroj: | Polymers Polymers, 2023, 15, ⟨10.3390/polym15092204⟩ Polymers; Volume 15; Issue 9; Pages: 2204 Polymers, 2023, 15 (9), pp.2204. ⟨10.3390/polym15092204⟩ |
| ISSN: | 2073-4360 |
| DOI: | 10.3390/polym15092204⟩ |
| Popis: | International audience; Block copolymers synthesized via Atom Transfer Radical Polymerization from alkyl acrylate and t-butyl acrylate and the subsequent hydrolysis of the t-butyl acrylate to acrylic acid were systematically varied with respect to their hydrophobic part by the variation in the alkyl chain length and the degree of polymerisation in this block. Depending on the architecture of the hydrophobic part, they had a more or less pronounced tendency to form copolymer micelles in an aqueous solution. They were employed for the preparation of IPECs by mixing the copolymer aggregates with the polycations polydiallyldimethylammonium chloride (PDADMAC) or q-chit. The IPEC structure as a function of the composition was investigated by Static Light and Small Angle Neutron Scattering. For weakly-associated block copolymers (short alkyl chain), complexation with polycation led to the formation of globular complexes, while already existing micelles (long alkyl chain) grew further in mass. In general, aggregates became larger upon the addition of further polycation, but this growth was much more pronounced for PDADMAC compared to q-chit, thereby leading to the formation of clusters of aggregates. Accordingly, the structure of such IPECs with a hydrophobic block depended largely on the type of complexing polyelectrolyte, which allowed for controlling the structural organisation via the molecular architecture of the two oppositely charged polyelectrolytes. |
| Databáze: | OpenAIRE |
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