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Ayazbayeva AY, Shakhvorostov AV, Gussenov IS, Seilkhanov TM, Aseyev VO, Kudaibergenov SE. Temperature and Salt Responsive Amphoteric Nanogels Based on N-Isopropylacrylamide, 2-Acrylamido-2-methyl-1-propanesulfonic Acid Sodium Salt and (3-Acrylamidopropyl) Trimethylammonium Chloride. NANOMATERIALS 2022; 12:nano12142343. [PMID: 35889568 PMCID: PMC9320390 DOI: 10.3390/nano12142343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/23/2022] [Accepted: 07/04/2022] [Indexed: 01/27/2023]
Abstract
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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Affiliation(s)
- Aigerim Ye. Ayazbayeva
- Laboratory of Functional Polymers, Institute of Polymer Materials and Technology, Almaty 050019, Kazakhstan; (A.V.S.); (I.S.G.)
- Department of Chemical and Biochemical Engineering, Satbayev University, Almaty 050013, Kazakhstan
- Correspondence: (A.Y.A.); (S.E.K.)
| | - Alexey V. Shakhvorostov
- Laboratory of Functional Polymers, Institute of Polymer Materials and Technology, Almaty 050019, Kazakhstan; (A.V.S.); (I.S.G.)
| | - Iskander Sh. Gussenov
- Laboratory of Functional Polymers, Institute of Polymer Materials and Technology, Almaty 050019, Kazakhstan; (A.V.S.); (I.S.G.)
- Department of Chemical and Biochemical Engineering, Satbayev University, Almaty 050013, Kazakhstan
| | - Tulegen M. Seilkhanov
- Laboratory of NMR-Spectroscopy, Sh. Ualikhanov University, Kokshetau 020000, Kazakhstan;
| | - Vladimir O. Aseyev
- Department of Chemistry, University of Helsinki, 00014 Helsinki, Finland;
| | - Sarkyt E. Kudaibergenov
- Laboratory of Functional Polymers, Institute of Polymer Materials and Technology, Almaty 050019, Kazakhstan; (A.V.S.); (I.S.G.)
- Correspondence: (A.Y.A.); (S.E.K.)
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2
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Improved foam stability through the combination of silica nanoparticle and thixotropic polymer: An experimental study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117153] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Hofzumahaus C, Strauch C, Schneider S. Monte Carlo simulations of weak polyampholyte microgels: pH-dependence of conformation and ionization. SOFT MATTER 2021; 17:6029-6043. [PMID: 34076026 DOI: 10.1039/d1sm00433f] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We performed Metropolis Monte Carlo simulations to investigate the impact of varying acid and base dissociation constants on the pH-dependent ionization and conformation of weak polyampholyte microgels under salt-free conditions and under explicit consideration of the chemical ionization equilibria of the acidic and basic groups and their electrostatic interaction. Irrespective of their relative acid and base dissociation constant, all of the microgels undergo a pH-dependent charge reversal from positive to negative with a neutral charge at the isoelectric point. This charge reversal is accompanied by a U-shaped swelling transition of the microgels with a minimum of their size at the point of charge neutrality. The width of the U-shaped swelling transition, however, is found to depend on the chosen relative acid and base dissociation constants through which the extent of the favorable electrostatic intramolecular interaction of the ionized acidic and basic groups is altered. The pH-dependent swelling transition of the microgels is found to become broader, the stronger the intramolecular electrostatic interaction of the oppositely charged ionized species is. In addition, the intramolecular charge compensation of the acidic and basic groups of the microgels allows their counterions to abandon the microgel and the associated gain in translational entropy further amplifies the broadening of the pH-dependent swelling transition. The analysis of the radial ionization profiles of the acidic and basic groups of the differently composed microgels reveals a variety of radial ionization patterns with a dependence on the overall charge of the microgels.
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Affiliation(s)
- C Hofzumahaus
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany.
| | - C Strauch
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany.
| | - S Schneider
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany.
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Liu Y, Mao S, Zhu L, Chen S, Wu C. Based on tannic acid and thermoresponsive microgels design a simple and high-efficiency multifunctional antibacterial coating. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110498] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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5
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Lopez CG, Lohmeier T, Wong JE, Richtering W. Electrostatic expansion of polyelectrolyte microgels: Effect of solvent quality and added salt. J Colloid Interface Sci 2020; 558:200-210. [DOI: 10.1016/j.jcis.2019.07.042] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 07/05/2019] [Accepted: 07/16/2019] [Indexed: 11/24/2022]
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Gelissen APH, Scotti A, Turnhoff SK, Janssen C, Radulescu A, Pich A, Rudov AA, Potemkin II, Richtering W. An anionic shell shields a cationic core allowing for uptake and release of polyelectrolytes within core-shell responsive microgels. SOFT MATTER 2018; 14:4287-4299. [PMID: 29774926 DOI: 10.1039/c8sm00397a] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To realize carriers for drug delivery, cationic containers are required for anionic guests. Nevertheless, the toxicity of cationic carriers limits their practical use. In this study, we investigate a model system of polyampholyte N-isopropylacrylamide (NIPAM)-based microgels with a cationic core and an anionic shell to study whether the presence of a negative shell allows the cationic core to be shielded while still enabling the uptake and release of the anionic guest polyelectrolytes. These microgels are loaded with polystyrene sulfonate of different molecular weights to investigate the influence of their chain length on the uptake and release process. By means of small-angle neutron scattering, we evaluate the spatial distribution of polystyrene sulfonate within the microgels. The guest molecules are located in different parts of the core-shell microgels depending on their size. By combining these scattering results with UV-vis spectroscopy, electrophoretic mobility and potentiometric titrations we gain complementary results to investigate the uptake and release process of polyelectrolytes in polyampholyte core-shell microgels. Moreover, Brownian molecular dynamic simulations are performed to compare the experimental and theoretical results of this model. Our findings demonstrate that the presence of a shell still enables efficient uptake of guest molecules into the cationic core. These anionic guest molecules can be released through an anionic shell. Furthermore, the presence of a shell enhances the stability of the microgel-polyelectrolyte complexes with respect to the cationic precursor microgel alone.
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Affiliation(s)
- Arjan P H Gelissen
- Institute of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany.
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7
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Yang Z, Zhang S, Tarabara VV, Bruening ML. Aqueous Swelling of Zwitterionic Poly(sulfobetaine methacrylate) Brushes in the Presence of Ionic Surfactants. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b01830] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Shouwei Zhang
- Department
of Chemical and Biomolecular Engineering and Department of Chemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | | | - Merlin L. Bruening
- Department
of Chemical and Biomolecular Engineering and Department of Chemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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Chen H, Nofen EM, Rykaczewski K, Dai LL. Colloidal lattices of environmentally responsive microgel particles at ionic liquid-water interfaces. J Colloid Interface Sci 2017; 504:440-447. [PMID: 28599243 DOI: 10.1016/j.jcis.2017.04.083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/26/2017] [Accepted: 04/26/2017] [Indexed: 10/19/2022]
Abstract
This work reports new evidence of the versatility of soft and environmentally responsive micron-sized colloidal gel particles as stabilizers at ionic liquid-water droplet interfaces. These particles display a duality with properties ascribed typically to both polymeric and colloidal systems. The utilization of fluorescently labeled composite microgel particles allows in-situ and facile visualization without the necessity of invasive sample preparation. When the prepared particles form monolayers equilibrated at the ionic liquid-water interface on fully covered droplets, the colloidal lattice re-orders itself depending on the surface charge of these particles. Finally, we demonstrate that the spontaneously formed and densely packed layer of microgel particles can be employed for extraction applications, as the interface remains permeable to small active species.
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Affiliation(s)
- Haobo Chen
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85287, United States
| | - Elizabeth M Nofen
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85287, United States
| | - Konrad Rykaczewski
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85287, United States
| | - Lenore L Dai
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85287, United States.
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Rudov AA, Gelissen APH, Lotze G, Schmid A, Eckert T, Pich A, Richtering W, Potemkin II. Intramicrogel Complexation of Oppositely Charged Compartments As a Route to Quasi-Hollow Structures. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00553] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Andrey A. Rudov
- Physics
Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
- DWI—Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52056, Germany
| | | | - Gudrun Lotze
- High
Brilliance Beamline ID02, ESRF—The European Synchrotron, 71, Avenue des Martyrs, CS40220, 38043 Grenoble Cedex 9, France
| | - Andreas Schmid
- Institute of Physical Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Thomas Eckert
- Institute of Physical Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Andrij Pich
- DWI—Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52056, Germany
- Institute
of Technical and Macromolecular Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Walter Richtering
- Institute of Physical Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Igor I. Potemkin
- Physics
Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
- DWI—Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52056, Germany
- National Research South Ural State University, Chelyabinsk 454080, Russian Federation
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Chai SG, Zhang H, Xie L, Zou QC, Zhang JZ. A study of the interaction between polyvinylpyrrolidone and gemini surfactant G12-3-12 by NMR. POLYMER SCIENCE SERIES A 2016. [DOI: 10.1134/s0965545x16030032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Schmid AJ, Schroeder R, Eckert T, Radulescu A, Pich A, Richtering W. Synthesis and solution behaviour of stimuli-sensitive zwitterionic microgels. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3749-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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