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Temperature and Salt Responsive Amphoteric Nanogels Based on N-Isopropylacrylamide, 2-Acrylamido-2-methyl-1-propanesulfonic Acid Sodium Salt and (3-Acrylamidopropyl) Trimethylammonium Chloride.
Ayazbayeva, Aigerim Ye; Shakhvorostov, Alexey V; Gussenov, Iskander Sh; Seilkhanov, Tulegen M; Aseyev, Vladimir O; Kudaibergenov, Sarkyt E.
Afiliación
  • Ayazbayeva AY; Laboratory of Functional Polymers, Institute of Polymer Materials and Technology, Almaty 050019, Kazakhstan.
  • Shakhvorostov AV; Department of Chemical and Biochemical Engineering, Satbayev University, Almaty 050013, Kazakhstan.
  • Gussenov IS; Laboratory of Functional Polymers, Institute of Polymer Materials and Technology, Almaty 050019, Kazakhstan.
  • Seilkhanov TM; Laboratory of Functional Polymers, Institute of Polymer Materials and Technology, Almaty 050019, Kazakhstan.
  • Aseyev VO; Department of Chemical and Biochemical Engineering, Satbayev University, Almaty 050013, Kazakhstan.
  • Kudaibergenov SE; Laboratory of NMR-Spectroscopy, Sh. Ualikhanov University, Kokshetau 020000, Kazakhstan.
Nanomaterials (Basel) ; 12(14)2022 Jul 08.
Article en En | MEDLINE | ID: mdl-35889568
Polyampholyte nanogels based on N-isopropylacrylamide (NIPAM), (3-acrylamidopropyl) trimethylammonium chloride (APTAC) and 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPS) were synthesized via conventional redox-initiated free radical copolymerization. The resultant nanogels of various compositions, specifically [NIPAM]:[APTAC]:[AMPS] = 90:5:5; 90:7.5:2.5; 90:2.5:7.5 mol.%, herein abbreviated as NIPAM90-APTAC5-AMPS5, NIPAM90-APTAC7.5-AMPS2.5 and NIPAM90-APTAC2.5-AMPS7.5, were characterized by a combination of 1H NMR and FTIR spectroscopy, TGA, UV-Vis, DLS and zeta potential measurements. The temperature and salt-responsive properties of amphoteric nanogels were studied in aqueous and saline solutions in a temperature range from 25 to 60 °C and at ionic strengths (µ) of 10-3 to 1M NaCl. Volume phase transition temperatures (VPTT) of the charge-balanced nanogel were found to reach a maximum upon the addition of salt, whereas the same parameter for the charge-imbalanced nanogels exhibited a sharp decrease at higher saline concentrations. A wide bimodal distribution of average hydrodynamic sizes of nanogel particles had a tendency to transform to a narrow monomodal peak at elevated temperatures and higher ionic strengths. According to the DLS results, increasing ionic strength results in the clumping of nanogel particles.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Año: 2022 Tipo del documento: Article País de afiliación: Kazajstán Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Año: 2022 Tipo del documento: Article País de afiliación: Kazajstán Pais de publicación: Suiza