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Chemical-Physical Behaviour of Microgels Made of Interpenetrating Polymer Networks of PNIPAM and Poly(acrylic Acid)

Microgels composed of stimuli responsive polymers have attracted worthwhile interest as model colloids for theorethical and experimental studies and for nanotechnological applications. A deep knowledge of their behaviour is fundamental for the design of new materials. Here we report the current unde...

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Autores principales: Nigro, Valentina, Angelini, Roberta, Bertoldo, Monica, Buratti, Elena, Franco, Silvia, Ruzicka, Barbara
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8122350/
https://www.ncbi.nlm.nih.gov/pubmed/33919087
http://dx.doi.org/10.3390/polym13091353
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author Nigro, Valentina
Angelini, Roberta
Bertoldo, Monica
Buratti, Elena
Franco, Silvia
Ruzicka, Barbara
author_facet Nigro, Valentina
Angelini, Roberta
Bertoldo, Monica
Buratti, Elena
Franco, Silvia
Ruzicka, Barbara
author_sort Nigro, Valentina
collection PubMed
description Microgels composed of stimuli responsive polymers have attracted worthwhile interest as model colloids for theorethical and experimental studies and for nanotechnological applications. A deep knowledge of their behaviour is fundamental for the design of new materials. Here we report the current understanding of a dual responsive microgel composed of poly(N-isopropylacrylamide) (PNIPAM), a temperature sensitive polymer, and poly(acrylic acid) (PAAc), a pH sensitive polymer, at different temperatures, PAAc contents, concentrations, solvents and pH. The combination of multiple techniques as Dynamic Light Scattering (DLS), Raman spectroscopy, Small Angle Neutron Scattering (SANS), rheology and electrophoretic measurements allow to investigate the hydrodynamic radius behaviour across the typical Volume Phase Transition (VPT), the involved molecular mechanism and the internal particle structure together with the viscoelastic properties and the role of ionic charge in the aggregation phenomena.
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spelling pubmed-81223502021-05-16 Chemical-Physical Behaviour of Microgels Made of Interpenetrating Polymer Networks of PNIPAM and Poly(acrylic Acid) Nigro, Valentina Angelini, Roberta Bertoldo, Monica Buratti, Elena Franco, Silvia Ruzicka, Barbara Polymers (Basel) Review Microgels composed of stimuli responsive polymers have attracted worthwhile interest as model colloids for theorethical and experimental studies and for nanotechnological applications. A deep knowledge of their behaviour is fundamental for the design of new materials. Here we report the current understanding of a dual responsive microgel composed of poly(N-isopropylacrylamide) (PNIPAM), a temperature sensitive polymer, and poly(acrylic acid) (PAAc), a pH sensitive polymer, at different temperatures, PAAc contents, concentrations, solvents and pH. The combination of multiple techniques as Dynamic Light Scattering (DLS), Raman spectroscopy, Small Angle Neutron Scattering (SANS), rheology and electrophoretic measurements allow to investigate the hydrodynamic radius behaviour across the typical Volume Phase Transition (VPT), the involved molecular mechanism and the internal particle structure together with the viscoelastic properties and the role of ionic charge in the aggregation phenomena. MDPI 2021-04-21 /pmc/articles/PMC8122350/ /pubmed/33919087 http://dx.doi.org/10.3390/polym13091353 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Review
Nigro, Valentina
Angelini, Roberta
Bertoldo, Monica
Buratti, Elena
Franco, Silvia
Ruzicka, Barbara
Chemical-Physical Behaviour of Microgels Made of Interpenetrating Polymer Networks of PNIPAM and Poly(acrylic Acid)
title Chemical-Physical Behaviour of Microgels Made of Interpenetrating Polymer Networks of PNIPAM and Poly(acrylic Acid)
title_full Chemical-Physical Behaviour of Microgels Made of Interpenetrating Polymer Networks of PNIPAM and Poly(acrylic Acid)
title_fullStr Chemical-Physical Behaviour of Microgels Made of Interpenetrating Polymer Networks of PNIPAM and Poly(acrylic Acid)
title_full_unstemmed Chemical-Physical Behaviour of Microgels Made of Interpenetrating Polymer Networks of PNIPAM and Poly(acrylic Acid)
title_short Chemical-Physical Behaviour of Microgels Made of Interpenetrating Polymer Networks of PNIPAM and Poly(acrylic Acid)
title_sort chemical-physical behaviour of microgels made of interpenetrating polymer networks of pnipam and poly(acrylic acid)
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8122350/
https://www.ncbi.nlm.nih.gov/pubmed/33919087
http://dx.doi.org/10.3390/polym13091353
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