Temperature responsive complex coacervate core micelles with a PEO and PNIPAAm corona
| العنوان: | Temperature responsive complex coacervate core micelles with a PEO and PNIPAAm corona |
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| المؤلفون: | Christine Jérôme, Arie de Keizer, Abdelhafid Aqil, Puck M. Moll, Martien A. Cohen Stuart, Ilja K. Voets, Pieter de Waard, Christophe Detrembleur |
| المصدر: | The Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical 112 (2008) 35 The Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical, 112(35), 10833-10840 |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | block-copolymers, Laboratorium voor Fysische chemie en Kolloïdkunde, water, Biophysics, Lower critical solution temperature, Micelle, chemistry.chemical_compound, 2 diblock copolymers, Polymer chemistry, Materials Chemistry, Physical and Theoretical Chemistry, Ionomer, Physical Chemistry and Colloid Science, polyelectrolyte, laser-light scattering, Coacervate, Aqueous solution, raft polymerization, aggregation, aqueous-solutions, Polyelectrolyte, Surfaces, Coatings and Films, Biofysica, chemistry, Ionic strength, Critical micelle concentration, poly(n-isopropylacrylamide-co-acrylic acid), n-isopropylacrylamide |
| الوصف: | In aqueous solutions at room temperature, poly( N-methyl-2-vinyl pyridinium iodide)- block-poly(ethylene oxide), P2MVP 38- b-PEO 211 and poly(acrylic acid)- block-poly(isopropyl acrylamide), PAA 55- b-PNIPAAm 88 spontaneously coassemble into micelles, consisting of a mixed P2MVP/PAA polyelectrolyte core and a PEO/PNIPAAm corona. These so-called complex coacervate core micelles (C3Ms), also known as polyion complex (PIC) micelles, block ionomer complexes (BIC), and interpolyelectrolyte complexes (IPEC), respond to changes in solution pH and ionic strength as their micellization is electrostatically driven. Furthermore, the PNIPAAm segments ensure temperature responsiveness as they exhibit lower critical solution temperature (LCST) behavior. Light scattering, two-dimensional 1H NMR nuclear Overhauser effect spectrometry, and cryogenic transmission electron microscopy experiments were carried out to investigate micellar structure and solution behavior at 1 mM NaNO 3, T = 25, and 60 degrees C, that is, below and above the LCST of approximately 32 degrees C. At T = 25 degrees C, C3Ms were observed for 7pH12 and NaNO 3 concentrations below approximately 105 mM. The PEO and PNIPAAm chains appear to be (randomly) mixed within the micellar corona. At T = 60 degrees C, onion-like complexes are formed, consisting of a PNIPAAm inner core, a mixed P2MVP/PAA complex coacervate shell, and a PEO corona. |
| وصف الملف: | application/pdf; application/octet-stream |
| اللغة: | English |
| تدمد: | 1520-6106 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2491548f44184f4fd9fc14ad3f61a5ae https://doi.org/10.1021/jp8014832 |
| حقوق: | RESTRICTED |
| رقم الأكسشن: | edsair.doi.dedup.....2491548f44184f4fd9fc14ad3f61a5ae |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15206106 |
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