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Coca-Hidalgo JJ, Recillas-Mota M, Fernández-Quiroz D, Lizardi-Mendoza J, Peniche-Covas C, Goycoolea FM, Argüelles-Monal WM. Study of the Thermal Phase Transition of Poly( N,N-diethylacrylamide- co- N-ethylacrylamide) Random Copolymers in Aqueous Solution. Polymers (Basel) 2024; 16:1575. [PMID: 38891521 PMCID: PMC11175111 DOI: 10.3390/polym16111575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 05/29/2024] [Accepted: 05/30/2024] [Indexed: 06/21/2024] Open
Abstract
N-alkyl-substituted polyacrylamides exhibit a thermal coil-to-globule transition in aqueous solution driven by an increase in hydrophobic interactions with rising temperature. With the aim of understanding the role of N-alkyl substituents in the thermal transition, this study focuses on the molecular interactions underlying the phase transition of poly(N,N-diethylacrylamide-co-N-ethylacrylamide) random copolymers. Poly(N,N-diethylacrylamide) (PDEAm), poly(N-ethylacrylamide) (PNEAm), and their random copolymers were synthesized by free radical polymerization and their chemical structure characterized spectroscopically. It was found that the values of the cloud-point temperature increased with PNEAm content, and particle aggregation processes took place, increasing the negative charge density on their surface. The cloud-point temperature of each copolymer decreased with respect to the theoretical values calculated assuming an absence of interactions. It is attributed to the formation of intra- and interchain hydrogen bonding in aqueous solutions. These interactions favor the formation of more hydrophobic macromolecular segments, thereby promoting the cooperative nature of the transition. These results definitively reveal the dominant mechanism occurring during the phase transition in the aqueous solutions of these copolymers.
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Affiliation(s)
- José Javier Coca-Hidalgo
- Centro de Investigación en Alimentación y Desarrollo, Hermosillo 83304, Mexico; (J.J.C.-H.); (M.R.-M.); (J.L.-M.)
| | - Maricarmen Recillas-Mota
- Centro de Investigación en Alimentación y Desarrollo, Hermosillo 83304, Mexico; (J.J.C.-H.); (M.R.-M.); (J.L.-M.)
| | - Daniel Fernández-Quiroz
- Departamento de Ingeniería Química y Metalurgia, Universidad de Sonora, Hermosillo 83000, Mexico;
| | - Jaime Lizardi-Mendoza
- Centro de Investigación en Alimentación y Desarrollo, Hermosillo 83304, Mexico; (J.J.C.-H.); (M.R.-M.); (J.L.-M.)
| | | | | | - Waldo M. Argüelles-Monal
- Centro de Investigación en Alimentación y Desarrollo, Hermosillo 83304, Mexico; (J.J.C.-H.); (M.R.-M.); (J.L.-M.)
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2
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Salvatore L, Russo F, Natali ML, Rajabimashhadi Z, Bagheri S, Mele C, Lionetto F, Sannino A, Gallo N. On the effect of pepsin incubation on type I collagen from horse tendon: Fine tuning of its physico-chemical and rheological properties. Int J Biol Macromol 2024; 256:128489. [PMID: 38043667 DOI: 10.1016/j.ijbiomac.2023.128489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 11/10/2023] [Accepted: 11/27/2023] [Indexed: 12/05/2023]
Abstract
Type I collagen is commonly recognized as the gold standard biomaterial for the manufacturing of medical devices for health-care related applications. In recent years, with the final aim of developing scaffolds with optimal bioactivity, even more studies focused on the influence of processing parameters on collagen properties, since processing can strongly affect the architecture of collagen at various length scales and, consequently, scaffolds macroscopic performances. The ability to finely tune scaffold properties in order to closely mimic the tissues' hierarchical features, preserving collagen's natural conformation, is actually of great interest. In this work, the effect of the pepsin-based extraction step on the material final properties was investigated. Thus, the physico-chemical properties of fibrillar type I collagens upon being extracted under various conditions were analyzed in depth. Correlations of collagen structure at the supramolecular scale with its microstructural properties were done, confirming the possibility of tuning rheological, viscoelastic and degradation properties of fibrillar type I collagen.
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Affiliation(s)
- Luca Salvatore
- Typeone Biomaterials Srl, Via Europa 167, Calimera, 73021 Lecce, Italy.
| | - Francesca Russo
- Department of Engineering for Innovation, University of Salento, Via Monteroni, 73100 Lecce, Italy.
| | | | - Zahra Rajabimashhadi
- Department of Engineering for Innovation, University of Salento, Via Monteroni, 73100 Lecce, Italy.
| | - Sonia Bagheri
- Department of Engineering for Innovation, University of Salento, Via Monteroni, 73100 Lecce, Italy.
| | - Claudio Mele
- Department of Engineering for Innovation, University of Salento, Via Monteroni, 73100 Lecce, Italy.
| | - Francesca Lionetto
- Department of Engineering for Innovation, University of Salento, Via Monteroni, 73100 Lecce, Italy.
| | - Alessandro Sannino
- Department of Engineering for Innovation, University of Salento, Via Monteroni, 73100 Lecce, Italy.
| | - Nunzia Gallo
- Typeone Biomaterials Srl, Via Europa 167, Calimera, 73021 Lecce, Italy; Department of Engineering for Innovation, University of Salento, Via Monteroni, 73100 Lecce, Italy.
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3
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Schäfer JL, Meckel T, Poppinga S, Biesalski M. Chemical Gradients in Polymer-Modified Paper Sheets-Towards Single-Layer Biomimetic Soft Robots. Biomimetics (Basel) 2023; 8:biomimetics8010043. [PMID: 36810374 PMCID: PMC9944451 DOI: 10.3390/biomimetics8010043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/10/2023] [Accepted: 01/12/2023] [Indexed: 01/20/2023] Open
Abstract
Biomimetic actuators are typically constructed as functional bi- or multilayers, where actuating and resistance layers together dictate bending responses upon triggering by environmental stimuli. Inspired by motile plant structures, like the stems of the false rose of Jericho (Selaginella lepidophylla), we introduce polymer-modified paper sheets that can act as soft robotic single-layer actuators capable of hygro-responsive bending reactions. A tailored gradient modification of the paper sheet along its thickness entails increased dry and wet tensile strength and allows at the same time for hygro-responsiveness. For the fabrication of such single-layer paper devices, the adsorption behavior of a cross-linkable polymer to cellulose fiber networks was first evaluated. By using different concentrations and drying procedures fine-tuned polymer gradients throughout the thickness can be achieved. Due to the covalent cross-linking of polymer with fibers, these paper samples possess significantly increased dry and wet tensile strength properties. We furthermore investigated these gradient papers with respect to a mechanical deflection during humidity cycling. The highest humidity sensitivity is achieved using eucalyptus paper with a grammage of 150 g m-2 modified with the polymer dissolved in IPA (~13 wt%) possessing a polymer gradient. Our study presents a straightforward approach for the design of novel hygroscopic, paper-based single-layer actuators, which have a high potential for diverse soft robotic and sensor applications.
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Affiliation(s)
- Jan-Lukas Schäfer
- Department of Chemistry, Macromolecular Chemistry & Paper Chemistry, Technical University of Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Tobias Meckel
- Department of Chemistry, Macromolecular Chemistry & Paper Chemistry, Technical University of Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Simon Poppinga
- Department of Biology, Botanical Garden, Technical University of Darmstadt, Schnittspahnstraße 10, 64287 Darmstadt, Germany
| | - Markus Biesalski
- Department of Chemistry, Macromolecular Chemistry & Paper Chemistry, Technical University of Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
- Correspondence: ; Tel.: +49-6151-1623721
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4
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Bhat MA, Rather RA, Yaseen Z, Shalla AH. Viscoelastic and smart swelling disposition of Carboxymethylcellulose based hydrogels substantiated by Gemini surfactant and in-vitro encapsulation and controlled release of Quercetin. Int J Biol Macromol 2022; 207:374-386. [PMID: 35257735 DOI: 10.1016/j.ijbiomac.2022.02.162] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 12/28/2021] [Accepted: 02/25/2022] [Indexed: 02/07/2023]
Abstract
CMC-SA-12-E2-12 hydrogels were prepared from Carboxymethylcellulose (CMC), succinic acid (SA) (biocompatible cross-linker) and Ethane-1,2-diyl-bis(N, N-dimethyl-N-dodecylammoniumacetoxy) (referred as 12-E2-12) (0.0006, 0.0015, 0.003, 0.0045 mMoles) by thermal treatment with economical and easy solution polymerization strategy. The CMC-SA-12E2-12 hydrogels were characterized for mechanical and viscoelastic properties like self-healing, viscosity and modulus using rheological analysis. Further the structural, morphological and thermal properties were investigated by FTIR, SEM and TGA analysis. The investigation revealed significant modulation in mechanical, viscoelastic, self-healing and drug release behavior with the addition of 12-E2-12. The CMC-SA-12-E2-12 hydrogels were investigated for drug release studies in PBS 7.4 for 48 h using Quercetin dihydrate. The results showed sustained release behavior at optimised concentration values of surfactant. Release data fitted nicely to the Higuchi model and hence the release could be seen to be diffusion controlled phenomenon or Fickian diffusion. The biocompatibility of cross-linker and surfactant may potentially make the hydrogels suitable for drug delivery applications.
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Affiliation(s)
- Mushtaq A Bhat
- Soft Material Laboratory, Department of Chemistry, Islamic University of Science and Technology Awantipora, Pulwama, Jammu and Kashmir 192122,India
| | - Reyaz A Rather
- Soft Material Laboratory, Department of Chemistry, Islamic University of Science and Technology Awantipora, Pulwama, Jammu and Kashmir 192122,India
| | - Zahid Yaseen
- Govt. College for Women MA Road Srinagar, Jammu and Kashmir 190001, India
| | - Aabid H Shalla
- Soft Material Laboratory, Department of Chemistry, Islamic University of Science and Technology Awantipora, Pulwama, Jammu and Kashmir 192122,India.
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Cai L, Xiong X, Qiao M, Guo J, Zhang H, Lin J, Liu S, Jia YG. Aggregation-induced emission luminogen based self-healing hydrogels fluorescent sensors for α-amylase. Polym Chem 2022. [DOI: 10.1039/d1py01505b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A self-healing hydrogel with a dual network was prepared through the host–guest recognition of acrylate γ-cyclodextrins with tetraphenylethylenes, and the fluorescence of hydrogel was enhanced in the presence of α-amylase.
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Affiliation(s)
- Lili Cai
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Xueru Xiong
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Mingyu Qiao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Jianwei Guo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Huatang Zhang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Jiawei Lin
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Sa Liu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Yong-Guang Jia
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
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6
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Ben-Miled A, Nabiyan A, Wondraczek K, Schacher FH, Wondraczek L. Controlling Growth of Poly (Triethylene Glycol Acrylate- Co-Spiropyran Acrylate) Copolymer Liquid Films on a Hydrophilic Surface by Light and Temperature. Polymers (Basel) 2021; 13:polym13101633. [PMID: 34069828 PMCID: PMC8157298 DOI: 10.3390/polym13101633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
A quartz crystal microbalance with dissipation monitoring (QCM-D) was employed for in situ investigations of the effect of temperature and light on the conformational changes of a poly (triethylene glycol acrylate-co-spiropyran acrylate) (P (TEGA-co-SPA)) copolymer containing 12-14% of spiropyran at the silica-water interface. By monitoring shifts in resonance frequency and in acoustic dissipation as a function of temperature and illumination conditions, we investigated the evolution of viscoelastic properties of the P (TEGA-co-SPA)-rich wetting layer growing on the sensor, from which we deduced the characteristic coil-to-globule transition temperature, corresponding to the lower critical solution temperature (LCST) of the PTEGA part. We show that the coil-to-globule transition of the adsorbed copolymer being exposed to visible or UV light shifts to lower LCST as compared to the bulk solution: the transition temperature determined acoustically on the surface is 4 to 8 K lower than the cloud point temperature reported by UV/VIS spectroscopy in aqueous solution. We attribute our findings to non-equilibrium effects caused by confinement of the copolymer chains on the surface. Thermal stimuli and light can be used to manipulate the film formation process and the film's conformational state, which affects its subsequent response behavior.
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Affiliation(s)
- Aziz Ben-Miled
- Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University Jena, D-07743 Jena, Germany;
| | - Afshin Nabiyan
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, D-07743 Jena, Germany; (A.N.); (F.H.S.)
| | - Katrin Wondraczek
- Leibniz Institute of Photonic Technology (Leibniz IPHT), D-07745 Jena, Germany;
| | - Felix H. Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, D-07743 Jena, Germany; (A.N.); (F.H.S.)
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, D-07743 Jena, Germany
| | - Lothar Wondraczek
- Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University Jena, D-07743 Jena, Germany;
- Correspondence: ; Tel.: +49-3641-9-48500
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7
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Kasza G, Stumphauser T, Bisztrán M, Szarka G, Hegedüs I, Nagy E, Iván B. Thermoresponsive Poly( N, N-diethylacrylamide- co-glycidyl methacrylate) Copolymers and Its Catalytically Active α-Chymotrypsin Bioconjugate with Enhanced Enzyme Stability. Polymers (Basel) 2021; 13:987. [PMID: 33806995 PMCID: PMC8004754 DOI: 10.3390/polym13060987] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/19/2021] [Accepted: 03/20/2021] [Indexed: 12/11/2022] Open
Abstract
Responsive (smart, intelligent, adaptive) polymers have been widely explored for a variety of advanced applications in recent years. The thermoresponsive poly(N,N-diethylacrylamide) (PDEAAm), which has a better biocompatibility than the widely investigated poly(N,N-isopropylacrylamide), has gained increased interest in recent years. In this paper, the successful synthesis, characterization, and bioconjugation of a novel thermoresponsive copolymer, poly(N,N-diethylacrylamide-co-glycidyl methacrylate) (P(DEAAm-co-GMA)), obtained by free radical copolymerization with various comonomer contents and monomer/initiator ratios are reported. It was found that all the investigated copolymers possess LCST-type thermoresponsive behavior with small extent of hysteresis, and the critical solution temperatures (CST), i.e., the cloud and clearing points, decrease linearly with increasing GMA content of these copolymers. The P(DEAAm-co-GMA) copolymer with pendant epoxy groups was found to conjugate efficiently with α-chymotrypsin in a direct, one-step reaction, leading to enzyme-polymer nanoparticle (EPNP) with average size of 56.9 nm. This EPNP also shows reversible thermoresponsive behavior with somewhat higher critical solution temperature than that of the unreacted P(DEAAm-co-GMA). Although the catalytic activity of the enzyme-polymer nanoconjugate is lower than that of the native enzyme, the results of the enzyme activity investigations prove that the pH and thermal stability of the enzyme is significantly enhanced by conjugation the with P(DEAAm-co-GMA) copolymer.
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Affiliation(s)
- György Kasza
- Polymer Chemistry Research Group, Institute of Materials and Environment Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2., H-1117 Budapest, Hungary; (T.S.); (M.B.); (G.S.)
| | - Tímea Stumphauser
- Polymer Chemistry Research Group, Institute of Materials and Environment Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2., H-1117 Budapest, Hungary; (T.S.); (M.B.); (G.S.)
| | - Márk Bisztrán
- Polymer Chemistry Research Group, Institute of Materials and Environment Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2., H-1117 Budapest, Hungary; (T.S.); (M.B.); (G.S.)
| | - Györgyi Szarka
- Polymer Chemistry Research Group, Institute of Materials and Environment Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2., H-1117 Budapest, Hungary; (T.S.); (M.B.); (G.S.)
| | - Imre Hegedüs
- Chemical and Biochemical Procedures Laboratory, Institute of Biomolecular and Chemical Engineering, Faculty of Engineering, University of Pannonia, Egyetem u. 10, H-8200 Veszprém, Hungary; (I.H.); (E.N.)
- Department of Biophysics and Radiation Biology, Semmelweis University, Tűzoltó u. 37–47, H-1094 Budapest, Hungary
| | - Endre Nagy
- Chemical and Biochemical Procedures Laboratory, Institute of Biomolecular and Chemical Engineering, Faculty of Engineering, University of Pannonia, Egyetem u. 10, H-8200 Veszprém, Hungary; (I.H.); (E.N.)
| | - Béla Iván
- Polymer Chemistry Research Group, Institute of Materials and Environment Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2., H-1117 Budapest, Hungary; (T.S.); (M.B.); (G.S.)
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Kolouchová K, Lobaz V, Beneš H, de la Rosa VR, Babuka D, Švec P, Černoch P, Hrubý M, Hoogenboom R, Štěpánek P, Groborz O. Thermoresponsive properties of polyacrylamides in physiological solutions. Polym Chem 2021. [DOI: 10.1039/d1py00843a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We show that the cloud point temperature (TCP) of thermoresponsive polyacrylamides is considerably lower in physiologically relevant solvents (phosphate-buffered saline, serum) than in pure water. This decrease of TCP may be critical for some biomedical applications.
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Affiliation(s)
- Kristýna Kolouchová
- Institute of Macromolecular Chemistry, Czech Academy of Science, Heyrovsky square 2, 162 06 Prague 6, Czech Republic
| | - Volodymyr Lobaz
- Institute of Macromolecular Chemistry, Czech Academy of Science, Heyrovsky square 2, 162 06 Prague 6, Czech Republic
| | - Hynek Beneš
- Institute of Macromolecular Chemistry, Czech Academy of Science, Heyrovsky square 2, 162 06 Prague 6, Czech Republic
| | - Victor R. de la Rosa
- Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Ghent, Belgium
- AVROXA BV, Technologiepark-Zwijnaarde 82, B-9052 Ghent, Belgium
| | - David Babuka
- Institute of Macromolecular Chemistry, Czech Academy of Science, Heyrovsky square 2, 162 06 Prague 6, Czech Republic
- Department of Biophysics, Institute of Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, Prague 2, 121 16, Czech Republic
| | - Pavel Švec
- Institute of Macromolecular Chemistry, Czech Academy of Science, Heyrovsky square 2, 162 06 Prague 6, Czech Republic
- Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University, Hlavova 8, Prague 2, 128 00, Czech Republic
| | - Peter Černoch
- Institute of Macromolecular Chemistry, Czech Academy of Science, Heyrovsky square 2, 162 06 Prague 6, Czech Republic
| | - Martin Hrubý
- Institute of Macromolecular Chemistry, Czech Academy of Science, Heyrovsky square 2, 162 06 Prague 6, Czech Republic
| | - Richard Hoogenboom
- Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Ghent, Belgium
| | - Petr Štěpánek
- Institute of Macromolecular Chemistry, Czech Academy of Science, Heyrovsky square 2, 162 06 Prague 6, Czech Republic
| | - Ondřej Groborz
- Institute of Macromolecular Chemistry, Czech Academy of Science, Heyrovsky square 2, 162 06 Prague 6, Czech Republic
- Institute of Biophysics and Informatics, Charles University, First Faculty of Medicine, Salmovská 1, 120 00 Prague 2, Czech Republic
- Department of Organic and Medicinal Chemistry, Charles University, Faculty of Science, Hlavova 8, 128 43 Prague 2, Czech Republic
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9
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van Hees IA, Hofman AH, Dompé M, van der Gucht J, Kamperman M. Temperature-responsive polyelectrolyte complexes for bio-inspired underwater adhesives. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.110034] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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10
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Poly(N,N-bis(2-methoxyethyl)acrylamide), a thermoresponsive non-ionic polymer combining the amide and the ethyleneglycolether motifs. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04701-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AbstractPoly(N,N-bis(2-methoxyethyl)acrylamide) (PbMOEAm) featuring two classical chemical motifs from non-ionic water-soluble polymers, namely, the amide and ethyleneglycolether moieties, was synthesized by reversible addition fragmentation transfer (RAFT) polymerization. This tertiary polyacrylamide is thermoresponsive exhibiting a lower critical solution temperature (LCST)–type phase transition. A series of homo- and block copolymers with varying molar masses but low dispersities and different end groups were prepared. Their thermoresponsive behavior in aqueous solution was analyzed via turbidimetry and dynamic light scattering (DLS). The cloud points (CP) increased with increasing molar masses, converging to 46 °C for 1 wt% solutions. This rise is attributed to the polymers’ hydrophobic end groups incorporated via the RAFT agents. When a surfactant-like strongly hydrophobic end group was attached using a functional RAFT agent, CP was lowered to 42 °C, i.e., closer to human body temperature. Also, the effect of added salts, in particular, the role of the Hofmeister series, on the phase transition of PbMOEAm was investigated, exemplified for the kosmotropic fluoride, intermediate chloride, and chaotropic thiocyanate anions. A pronounced shift of the cloud point of about 10 °C to lower or higher temperatures was observed for 0.2 M fluoride and thiocyanate, respectively. When PbMOEAm was attached to a long hydrophilic block of poly(N,N-dimethylacrylamide) (PDMAm), the cloud points of these block copolymers were strongly shifted towards higher temperatures. While no phase transition was observed for PDMAm-b-pbMOEAm with short thermoresponsive blocks, block copolymers with about equally sized PbMOEAm and PDMAm blocks underwent the coil-to-globule transition around 60 °C.
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11
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Matsumoto M, Tada T, Asoh TA, Shoji T, Nishiyama T, Horibe H, Katsumoto Y, Tsuboi Y. Dynamics of the Phase Separation in a Thermoresponsive Polymer: Accelerated Phase Separation of Stereocontrolled Poly( N, N-diethylacrylamide) in Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13690-13696. [PMID: 30362770 DOI: 10.1021/acs.langmuir.8b02848] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We studied the dependence on tacticity of the dynamic phase separation behavior of thermoresponsive poly( N, N-diethylacrylamide) (PDEA) in an aqueous solution. Using a laser temperature-jump technique combined with transient photometry, we determined the time constants of the phase separation and found that both atactic and isotactic-rich PDEAs had fast and slow phase separation processes (τfast and τslow). The fast process (τfast) was independent of the tacticity, irrespective of the concentration. On the other hand, the slow process had a strong dependence on the tacticity. We found the slow phase separation process got considerably faster with increasing isotacticity in dilute solutions. This effect due to the tacticity of the PDEA is totally different from that of poly( N-isopropylacrylamide) and can be explained on the basis of the difference between the hydrophobicity of atactic PDEA and that of isotactic-rich PDEA.
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Affiliation(s)
| | - Takanori Tada
- Graduate School of Chemical Sciences and Engineering , Hokkaido University , Sapporo 060-0810 , Japan
| | | | | | | | | | - Yukiteru Katsumoto
- Department of Chemistry, Faculty of Science , Fukuoka University , 8-19-1 Nanakuma , Jonan-ku, Fukuoka 814-0180 , Japan
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12
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Sukul PK, Malik S. Co(II) Induced Aggregation of Chiral Perylene Derivatives and Macroscopic Formation of Supramolecular Networks. CHEM LETT 2018. [DOI: 10.1246/cl.171192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Pradip Kumar Sukul
- Department of Chemistry, National Institute of Technology Patna, Ashok Rajpath, Patna-800005, Bihar, India
| | - Sudip Malik
- Polymer Science Unit, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Rd., Jadavpur, Kolkata-700032, India
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13
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Işıklan N, Kazan H. Thermoresponsive and biocompatible poly(vinyl alcohol)-graft-poly(N,N-diethylacrylamide) copolymer: Microwave-assisted synthesis, characterization, and swelling behavior. J Appl Polym Sci 2017. [DOI: 10.1002/app.45969] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Nuran Işıklan
- Department of Chemistry, Faculty of Arts and Sciences; Kırıkkale University; Yahşihan 71450 Kırıkkale Turkey
| | - Hacer Kazan
- Department of Chemistry, Faculty of Arts and Sciences; Kırıkkale University; Yahşihan 71450 Kırıkkale Turkey
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14
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Sun Z, Tian Y, Hom WL, Gang O, Bhatia SR, Grubbs RB. Translating Thermal Response of Triblock Copolymer Assemblies in Dilute Solution to Macroscopic Gelation and Phase Separation. Angew Chem Int Ed Engl 2017; 56:1491-1494. [DOI: 10.1002/anie.201609360] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 11/30/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Zhe Sun
- Department of ChemistryStony Brook University Stony Brook NY 11764-3400 USA
| | - Ye Tian
- Center for Functional NanomaterialsBrookhaven National Laboratory Upton NY 11974 USA
| | - Wendy L. Hom
- Department of ChemistryStony Brook University Stony Brook NY 11764-3400 USA
| | - Oleg Gang
- Center for Functional NanomaterialsBrookhaven National Laboratory Upton NY 11974 USA
- Department of Chemical EngineeringColumbia University New York NY 10027 USA
- Department of Applied Physics and Applied MathematicsColumbia University New York NY 10027 USA
| | - Surita R. Bhatia
- Department of ChemistryStony Brook University Stony Brook NY 11764-3400 USA
| | - Robert B. Grubbs
- Department of ChemistryStony Brook University Stony Brook NY 11764-3400 USA
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15
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Sun Z, Tian Y, Hom WL, Gang O, Bhatia SR, Grubbs RB. Translating Thermal Response of Triblock Copolymer Assemblies in Dilute Solution to Macroscopic Gelation and Phase Separation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609360] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zhe Sun
- Department of Chemistry; Stony Brook University; Stony Brook NY 11764-3400 USA
| | - Ye Tian
- Center for Functional Nanomaterials; Brookhaven National Laboratory; Upton NY 11974 USA
| | - Wendy L. Hom
- Department of Chemistry; Stony Brook University; Stony Brook NY 11764-3400 USA
| | - Oleg Gang
- Center for Functional Nanomaterials; Brookhaven National Laboratory; Upton NY 11974 USA
- Department of Chemical Engineering; Columbia University; New York NY 10027 USA
- Department of Applied Physics and Applied Mathematics; Columbia University; New York NY 10027 USA
| | - Surita R. Bhatia
- Department of Chemistry; Stony Brook University; Stony Brook NY 11764-3400 USA
| | - Robert B. Grubbs
- Department of Chemistry; Stony Brook University; Stony Brook NY 11764-3400 USA
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16
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Herfurth C, Laschewsky A, Noirez L, von Lospichl B, Gradzielski M. Thermoresponsive (star) block copolymers from one-pot sequential RAFT polymerizations and their self-assembly in aqueous solution. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.09.089] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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He N, Wang Y, Lu Z. Temperature-responsive “tadpole-shaped” protein-polymer hybrids and their self-assembly behavior. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3806] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Naipu He
- College of Chemical and Biological Engineering; Lanzhou Jiaotong University; 88 Anning Xilu Lanzhou 730070 China
| | - Yue Wang
- College of Chemical and Biological Engineering; Lanzhou Jiaotong University; 88 Anning Xilu Lanzhou 730070 China
| | - Zhenwu Lu
- College of Chemical and Biological Engineering; Lanzhou Jiaotong University; 88 Anning Xilu Lanzhou 730070 China
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18
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Rancan F, Asadian-Birjand M, Dogan S, Graf C, Cuellar L, Lommatzsch S, Blume-Peytavi U, Calderón M, Vogt A. Effects of thermoresponsivity and softness on skin penetration and cellular uptake of polyglycerol-based nanogels. J Control Release 2016; 228:159-169. [DOI: 10.1016/j.jconrel.2016.02.047] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 01/08/2016] [Accepted: 02/29/2016] [Indexed: 12/19/2022]
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19
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Costa MC, Silva SM, Antunes FE. Adjusting the low critical solution temperature of poly(N-isopropyl acrylamide) solutions by salts, ionic surfactants and solvents: A rheological study. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.02.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Li H, Wu R, Zhu J, Guo P, Ren W, Xu S, Wang J. pH/temperature double responsive behaviors and mechanical strength of laponite-crosslinked poly(DEA-co
-DMAEMA) nanocomposite hydrogels. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23713] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Huili Li
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering; Xinjiang University, No. 666 Shengli Road Urumqi Xinjiang 830046 China
| | - Ronglan Wu
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering; Xinjiang University, No. 666 Shengli Road Urumqi Xinjiang 830046 China
| | - Jinlong Zhu
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering; Xinjiang University, No. 666 Shengli Road Urumqi Xinjiang 830046 China
| | - Pingping Guo
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering; Xinjiang University, No. 666 Shengli Road Urumqi Xinjiang 830046 China
| | - Wenchen Ren
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering; Xinjiang University, No. 666 Shengli Road Urumqi Xinjiang 830046 China
| | - Shimei Xu
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering; Xinjiang University, No. 666 Shengli Road Urumqi Xinjiang 830046 China
| | - Jide Wang
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering; Xinjiang University, No. 666 Shengli Road Urumqi Xinjiang 830046 China
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21
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Cheng B, Cui S. Supramolecular Chemistry and Mechanochemistry of Macromolecules: Recent Advances by Single-Molecule Force Spectroscopy. Top Curr Chem (Cham) 2015; 369:97-134. [DOI: 10.1007/128_2015_628] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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22
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Simula A, Nikolaou V, Anastasaki A, Alsubaie F, Nurumbetov G, Wilson P, Kempe K, Haddleton DM. Synthesis of well-defined α,ω-telechelic multiblock copolymers in aqueous medium: in situ generation of α,ω-diols. Polym Chem 2015. [DOI: 10.1039/c4py01802h] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of well-defined α,ω-dihydroxyl telechelic multiblock copolymers by sequential in situ chain extensions via aqueous Cu(0) mediated living radical polymerization (SET-LRP) is reported.
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Affiliation(s)
| | | | | | | | | | - Paul Wilson
- University of Warwick
- Chemistry Department
- Coventry
- UK
- Monash Institute of Pharmaceutical Sciences
| | - Kristian Kempe
- University of Warwick
- Chemistry Department
- Coventry
- UK
- Monash Institute of Pharmaceutical Sciences
| | - David M. Haddleton
- University of Warwick
- Chemistry Department
- Coventry
- UK
- Monash Institute of Pharmaceutical Sciences
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23
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Pena-Francesch A, Montero L, Borrós S. Tailoring the LCST of thermosensitive hydrogel thin films deposited by iCVD. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7162-7167. [PMID: 24874567 DOI: 10.1021/la5003594] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Using the iCVD (initiated chemical vapor deposition) polymerization technique, we generated a library of thermosensitive thin film hydrogels in the physiological temperature range. The library shows how a specific hydrogel with a desired temperature response can be synthesized via the copolymerization of three main components: (a) the main thermosensitive monomer, which determines the temperature range of the LCST; (b) the comonomer, which modulates the temperature according to its hydrophilic/hydrophobic behavior; and (c) the cross-linker, which determines the swelling degree and the polymer chain mobility of the resulting hydrogel. The thermosensitive thin films included in the library have been characterized by the water contact angle (WCA), revealing a switchable hydrophobic/hydrophilic behavior depending on the temperature and a decrease in the WCA with the incorporation of hydrophilic moieties. Moreover, a more accurate characterization by quartz crystal microbalance (QCM) is performed. With temperature and flow control, the switchable swelling properties of the thermosensitive thin films (due to the polymer mixture transition) can be recorded and analyzed in order to study the effects of the comonomer moieties on the lower critical solution temperature (LCST). Thus, the LCST tailoring method has been successfully used in this paper, and thermoresponsive thin films (50 nm in thickness) have been deposited by iCVD, exhibiting LCSTs in the 32-49 °C range. Due to the presented method's ability to tailor the LCST in the physiological temperature range, the developed thermoresponsive films present potential biosensing and drug delivery applications in the biomedical field.
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Affiliation(s)
- Abdon Pena-Francesch
- Grup d'Enginyeria de Materials, Institut Químic de Sarrià-Universitat Ramon Llull , Via Augusta 390, 08017 Barcelona, Spain
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24
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Reinelt S, Steinke D, Ritter H. End-group-functionalized poly(N,N-diethylacrylamide) via free-radical chain transfer polymerization: Influence of sulfur oxidation and cyclodextrin on self-organization and cloud points in water. Beilstein J Org Chem 2014; 10:680-91. [PMID: 24778720 PMCID: PMC3999829 DOI: 10.3762/bjoc.10.61] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 02/26/2014] [Indexed: 01/09/2023] Open
Abstract
In this work we report the synthesis of thermo-, oxidation- and cyclodextrin- (CD) responsive end-group-functionalized polymers, based on N,N-diethylacrylamide (DEAAm). In a classical free-radical chain transfer polymerization, using thiol-functionalized 4-alkylphenols, namely 3-(4-(1,1-dimethylethan-1-yl)phenoxy)propane-1-thiol and 3-(4-(2,4,4-trimethylpentan-2-yl)phenoxy)propane-1-thiol, poly(N,N-diethylacrylamide) (PDEAAm) with well-defined hydrophobic end-groups is obtained. These end-group-functionalized polymers show different cloud point values, depending on the degree of polymerization and the presence of randomly methylated β-cyclodextrin (RAMEB-CD). Additionally, the influence of the oxidation of the incorporated thioether linkages on the cloud point is investigated. The resulting hydrophilic sulfoxides show higher cloud point values for the lower critical solution temperature (LCST). A high degree of functionalization is supported by 1H NMR-, SEC-, FTIR- and MALDI–TOF measurements.
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Affiliation(s)
- Sebastian Reinelt
- Heinrich-Heine-University of Düsseldorf, Institute of Organic Chemistry and Macromolecular Chemistry, Department of Preparative Polymer Chemistry, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Daniel Steinke
- Heinrich-Heine-University of Düsseldorf, Institute of Organic Chemistry and Macromolecular Chemistry, Department of Preparative Polymer Chemistry, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Helmut Ritter
- Heinrich-Heine-University of Düsseldorf, Institute of Organic Chemistry and Macromolecular Chemistry, Department of Preparative Polymer Chemistry, Universitätsstraße 1, 40225 Düsseldorf, Germany
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25
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Pang X, Cui S. Single-chain mechanics of poly(N,N-diethylacrylamide) and poly(N-isopropylacrylamide): comparative study reveals the effect of hydrogen bond donors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12176-12182. [PMID: 24003907 DOI: 10.1021/la403132e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The single-chain mechanics of two similar thermosensitive polymers, poly(N,N-diethylacrylamide) (PDEAM) and poly(N-isopropylacrylamide) (PNIPAM), have been studied by atomic force microscopy-based single-molecule force spectroscopy (SMFS). In a typical nonpolar organic solvent, octane, both of the polymers show the same inherent elasticity, although they have different substitutional groups. However, the mechanics of the two polymers presents large differences in water. The energies needed for the rearrangement of the bound water during elongation at room temperature are estimated by the SMFS method at the single-chain level, which is ~1.13 ± 0.10 and ~5.19 ± 0.10 kJ/mol for PDEAM and PNIPAM, respectively. In addition, PNIPAM shows a temperature-dependent single-chain mechanics when the temperature is increased across the lower critical solution temperature (LCST), while PDEAM does not. These differences observed in aqueous solution originate from the different structures of the two polymers. With a hydrogen bond donor in the amide group, PNIPAM will be more hydrated when T < LCST. When T > LCST, PNIPAM will have larger changes in both conformation and hydration. These findings also suggest that PNIPAM is a good candidate for a thermo-driven single-molecule motor, while PDEAM is not.
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Affiliation(s)
- Xiangchao Pang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University , Chengdu 610031, China
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26
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Peters O, Ritter H. Supramolekulare Steuerung der Wasseraufnahme makroskopischer Materialien durch Cyclodextrin-induzierte Änderung der Hydrophilie. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Peters O, Ritter H. Supramolecular Controlled Water Uptake of Macroscopic Materials by a Cyclodextrin-Induced Hydrophobic-to-Hydrophilic Transition. Angew Chem Int Ed Engl 2013; 52:8961-3. [DOI: 10.1002/anie.201301286] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 05/02/2013] [Indexed: 11/09/2022]
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28
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Ma YZ, Shaw RW, Yu X, O’Neill HM, Hong K. Excited-State Dynamics of Water-Soluble Polythiophene Derivatives: Temperature and Side-Chain Length Effects. J Phys Chem B 2012; 116:14451-60. [DOI: 10.1021/jp304526h] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ying-Zhong Ma
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge,
Tennessee 37831, United States
| | - Robert W. Shaw
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge,
Tennessee 37831, United States
| | - Xiang Yu
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge,
Tennessee 37831, United States
| | - Hugh M. O’Neill
- Center for Structural Molecular Biology, Biology & Soft Matter Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831, United States
| | - Kunlun Hong
- Center for Nanophase Materials
Sciences, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831, United States
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29
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Strandman S, Lessard DG, van Dusschoten D, Wilhelm M, Wood-Adams PM, Spiess HW, Zhu X. Two-dimensional Fourier transform rheological study on thermosensitivity of poly(N,N-diethylacrylamide) in aqueous solutions. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.08.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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30
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Lessard DG, Li YF, Zhu XX. Thermosensitive superabsorbents based on poly(N,N-diethylacrylamide-co-sodium acrylate). CHINESE JOURNAL OF POLYMER SCIENCE 2012. [DOI: 10.1007/s10118-012-1186-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Role of intermolecular interactions for upper and lower critical solution temperature behaviors in polymer solutions: Molecular simulations and thermodynamic modeling. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.06.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Savoji MT, Strandman S, Zhu XX. Block Random Copolymers of N-Alkyl-Substituted Acrylamides with Double Thermosensitivity. Macromolecules 2012. [DOI: 10.1021/ma2027269] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohammad T. Savoji
- Department of Chemistry, Université de Montréal, CP 6128, Succursale Centre-ville,
Montreal, QC H3C 3J7, Canada
| | - Satu Strandman
- Department of Chemistry, Université de Montréal, CP 6128, Succursale Centre-ville,
Montreal, QC H3C 3J7, Canada
| | - X. X. Zhu
- Department of Chemistry, Université de Montréal, CP 6128, Succursale Centre-ville,
Montreal, QC H3C 3J7, Canada
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33
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Saeed A, Georget DM, Mayes AG. Solution thermal properties of a family of thermo-responsive N-isopropyl acrylamide-co-N-hydroxymethyl acrylamide copolymers – Aspects intrinsic to the polymers. REACT FUNCT POLYM 2012. [DOI: 10.1016/j.reactfunctpolym.2011.10.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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35
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Barroso T, Viveiros R, Coelho M, Casimiro T, Botelho do Rego AM, Aguiar-Ricardo A. Influence of poly(N
-isopropylacrylamide) and poly(N
,N
′-diethyl acrylamide) coatings on polysulfone/polyacrylonitrile-based membranes for protein separation. POLYM ADVAN TECHNOL 2011. [DOI: 10.1002/pat.2057] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Telma Barroso
- REQUIMTE, Departamento de Química; Faculdade de Ciências e Tecnologia; Universidade Nova de Lisboa; 2829-516 Caparica Portugal
| | - Raquel Viveiros
- REQUIMTE, Departamento de Química; Faculdade de Ciências e Tecnologia; Universidade Nova de Lisboa; 2829-516 Caparica Portugal
| | - Margarida Coelho
- REQUIMTE, Departamento de Química; Faculdade de Ciências e Tecnologia; Universidade Nova de Lisboa; 2829-516 Caparica Portugal
| | - Teresa Casimiro
- REQUIMTE, Departamento de Química; Faculdade de Ciências e Tecnologia; Universidade Nova de Lisboa; 2829-516 Caparica Portugal
| | - Ana M. Botelho do Rego
- Centro de Química-Física Molecular (CQFM) and Institute of Nanoscience and Nanotechnology (IN),; Departamento de Engenharia Química e Biológica; Instituto Superior Técnico - Universidade Técnica de Lisboa; Lisboa Portugal
| | - Ana Aguiar-Ricardo
- REQUIMTE, Departamento de Química; Faculdade de Ciências e Tecnologia; Universidade Nova de Lisboa; 2829-516 Caparica Portugal
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36
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Maleki A, Kjøniksen AL, Zhu K, Nyström B. Temperature-Induced Aggregation Kinetics in Aqueous Solutions of a Temperature-Sensitive Amphiphilic Block Copolymer. J Phys Chem B 2011; 115:8975-80. [DOI: 10.1021/jp202607p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Atoosa Maleki
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
- Department of Pharmacy, School of Pharmacy, University of Oslo, Oslo, Norway
| | - Anna-Lena Kjøniksen
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
- Department of Pharmacy, School of Pharmacy, University of Oslo, Oslo, Norway
| | - Kaizheng Zhu
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Bo Nyström
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
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37
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Luo S, Han M, Cao Y, Ling C, Zhang Y. Temperature- and pH-responsive unimolecular micelles with a hydrophobic hyperbranched core. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2448-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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38
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In situ-forming chitosan/nano-hydroxyapatite/collagen gel for the delivery of bone marrow mesenchymal stem cells. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.02.029] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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39
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Fischer F, Zufferey D, Tahoces R. Lower critical solution temperature in superheated water: the highest in the poly(N,N-dialkylacrylamide) series. POLYM INT 2011. [DOI: 10.1002/pi.3071] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Luo S, Ling C, Hu X, Liu X, Chen S, Han M, Xia J. Thermoresponsive unimolecular micelles with a hydrophobic dendritic core and a double hydrophilic block copolymer shell. J Colloid Interface Sci 2011; 353:76-82. [DOI: 10.1016/j.jcis.2010.09.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2010] [Revised: 09/08/2010] [Accepted: 09/10/2010] [Indexed: 11/29/2022]
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41
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Lu Y, Zhou K, Ding Y, Zhang G, Wu C. Origin of hysteresis observed in association and dissociation of polymer chains in water. Phys Chem Chem Phys 2010; 12:3188-94. [PMID: 20237708 DOI: 10.1039/b918969f] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By choosing poly(N,N-diethylacrylamide) which lacks the possibility to form intra- or inter-chain hydrogen bonds, we studied its chain association and dissociation in water by using laser light scattering (LLS), ultrasensitive differential scanning calorimetry (US-DSC) and Fourier transform infrared spectroscopy (FTIR). As the solution temperature increases, the average hydrodynamic radius (R(h)) and average radius of gyration (R(g)) decrease, indicating the intrachain shrinking. When the temperature is higher than its lower critical solution temperature (LCST, approximately 30 degrees C), the apparent weight-average molar mass (M(w,app)) increases, reflecting the interchain association. At the same time, FTIR study reveals that as the temperature increases, the area ratio of two absorption peaks, respectively, associated to one hydrogen bonded carbonyl >C=O...H-O-H and free carbonyl >C=O groups increases, while that related to two hydrated hydrogen bonded carbonyl groups decreases, indicating heating-induced dehydration. In the reversible cooling process, R(h), R(g), M(w,app) and area ratios of the absorption peak are similar to those in the heating process for each given temperature, indicating that there is no hysteresis in the interchain association and dissociation. This present study confirms that the hysteresis previously observed for a sister polymer, poly(N-isopropylacrylamide), is due to the formation of some additional hydrogen bonds in its collapsed state at temperatures higher than the LCST.
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Affiliation(s)
- Yijie Lu
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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42
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Aseyev V, Tenhu H, Winnik FM. Non-ionic Thermoresponsive Polymers in Water. ADVANCES IN POLYMER SCIENCE 2010. [DOI: 10.1007/12_2010_57] [Citation(s) in RCA: 374] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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43
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Marcelo G, J. V. Prazeres T, Charreyre MT, Martinho JMG, Farinha JPS. Thermoresponsive Micelles of Phenanthrene-α-end-labeled Poly(N-decylacrylamide-b-N,N-diethylacrylamide) in Water. Macromolecules 2009. [DOI: 10.1021/ma902103q] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gema Marcelo
- Centro de Química-Física Molecular and IN-Institute for Nanoscience and Nanotechnology Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Telmo J. V. Prazeres
- Centro de Química-Física Molecular and IN-Institute for Nanoscience and Nanotechnology Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Unité Mixte CNRS-bioMérieux, ENS, 46 Allée d’Italie, 69364 Lyon Cedex 07, France
| | | | - José M. G. Martinho
- Centro de Química-Física Molecular and IN-Institute for Nanoscience and Nanotechnology Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - José Paulo S. Farinha
- Centro de Química-Física Molecular and IN-Institute for Nanoscience and Nanotechnology Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Root BE, Hammock ML, Barron AE. Thermoresponsive N-alkoxyalkylacrylamide polymers as a sieving matrix for high-resolution DNA separations on a microfluidic chip. Electrophoresis 2009; 29:4677-83. [PMID: 19053065 DOI: 10.1002/elps.200800354] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In recent years, there has been an increasing demand for a wide range of DNA separations that require the development of materials to meet the needs of high resolution and high throughput. Here, we demonstrate the use of thermoresponsive N-alkoxyalkylacrylamide polymers as a sieving matrix for DNA separations on a microfluidic chip. The viscosities of the N-alkoxyalkylacrylamide polymers are more than an order of magnitude lower than that of a linear polyacrylamide (LPA) of corresponding molecular weight, allowing rapid loading of the microchip. At 25 degrees C, N-alkoxyalkylacrylamide polymers can provide improved DNA separations compared with LPA in terms of reduced separation time and increased separation efficiency, particularly for the larger DNA fragments. The improved separation efficiency in N-alkoxyalkylacrylamide polymers is attributed to the peak widths increasing only slightly with DNA fragment size, while the peak widths increase appreciably above 150 bp using an LPA matrix. Upon elevating the temperature to 50 degrees C, the increase in viscosity of the N-alkoxyalkylacrylamide solutions is dependent upon their overall degree of hydrophobicity. The most hydrophobic polymers exhibit a lower critical solution temperature below 50 degrees C, undergoing a coil-to-globule transition followed by chain aggregation. DNA separation efficiency at 50 degrees C therefore decreases significantly with increasing hydrophobic character of the polymers, and no separations were possible with solutions with a lower critical solution temperature below 50 degrees C. The work reported here demonstrates the potential for this class of polymers to be used for applications such as PCR product and RFLP sizing, and provides insight into the effect of polymer hydrophobicity on DNA separations.
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Affiliation(s)
- Brian E Root
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
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Li Y, Pan S, Zhang W, Du Z. Novel thermo-sensitive core-shell nanoparticles for targeted paclitaxel delivery. NANOTECHNOLOGY 2009; 20:065104. [PMID: 19417372 DOI: 10.1088/0957-4484/20/6/065104] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Novel thermo-sensitive nanoparticles self-assembled from poly(N,N-diethylacrylamide-co-acrylamide)-block-poly(gamma-benzyl L-glutamate) were designed for targeted drug delivery in localized hyperthermia. The lower critical solution temperature (LCST) of nanoparticles was adjusted to a level between physiological body temperature (37 degrees C) and that used in local hyperthermia (about 43 degrees C). The temperature-dependent performances of the core-shell nanoparticles were systemically studied by nuclear magnetic resonance (NMR), circular dichroism (CD), fluorescence spectroscopy, dynamic light scattering (DLS), and atom force microscopy (AFM). The mean diameter of the nanoparticles increased slightly from 110 to 129 nm when paclitaxel (PTX), a poorly water-soluble anti-tumor drug, was encapsulated. A stability study in bovine serum albumin (BSA) solution indicated that the PTX loaded nanoparticles may have a long circulation time under physiological environments as the LCST was above physiological body temperature and the shell remained hydrophilic at 37 degrees C. The PTX release profiles showed thermo-sensitive controlled behavior. The proliferation inhibiting activity of PTX loaded nanoparticles was evaluated against Hela cells in vitro, compared with Taxol (a formulation of paclitaxel dissolved in Cremophor EL and ethanol). The cytotoxicity of PTX loaded nanoparticles increased obviously when hyperthermia was performed. The nanoparticles synthesized here could be an ideal candidate for thermal triggered anti-tumor PTX delivery system.
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Affiliation(s)
- Yuanpei Li
- The First Affiliated Hospital, Sun Yat Sen University, Guangzhou 510080, People's Republic of China
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Kjøniksen AL, Zhu K, Karlsson G, Nyström B. Novel transition behavior in aqueous solutions of a charged thermoresponsive triblock copolymer. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2008.09.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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47
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Thermal response of low molecular weight poly-(N-isopropylacrylamide) polymers in aqueous solution. Polym Bull (Berl) 2008. [DOI: 10.1007/s00289-008-0029-4] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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48
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Zhu K, Pamies R, Kjøniksen AL, Nyström B. Temperature-induced intermicellization of "hairy" and "crew-cut" micelles in an aqueous solution of a thermoresponsive copolymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:14227-14233. [PMID: 19360967 DOI: 10.1021/la8030073] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Temperature-induced intermicellar structures in aqueous solutions of the thermoresponsive methoxypoly(ethylene glycol)-block-poly(N-isopropylacrylamide) (MPEGn-b-NIPAAM71) copolymer that exhibit a lower critical solution temperature were studied by means of turbidimetry, dynamic light scattering (DLS), shear viscosity, and rheo small-angle light scattering (rheo-SALS) methods. The length of the hydrophilic chains (MPEG) of the copolymer varies from n=0 to n=114. It is shown that this change has a major impact on the temperature-induced association behavior of the polymer in solution. The turbidity results at quiescent conditions revealed a transition peak in the turbidity curve at intermediate temperatures, and this peak as well as the cloud point is shifted toward higher temperatures with increasing length of the hydrophilic chains of the copolymer. The DLS measurements disclosed a fast and a slow relaxation mode, which both are diffusive. From the fast and slow relaxation times the sizes of unimers/micelles and intermicellar clusters, respectively, can be determined. The temperature-induced aggregation is less pronounced in solutions of copolymers with long hydrophilic chains, and the intermicellar structures exhibit an interesting transition at intermediate temperatures. In the shear viscosity measurements large association complexes are formed at high temperatures and at low shear flow for the polymers with short hydrophilic chains, whereas at high shear rates breakup of interaggregate chains was observed. For the copolymer with the highest number of hydrophilic chains (n=114), a novel transition peak was found in the viscosity data. The rheo-SALS results divulged shear-induced structural changes of the association complexes at elevated temperatures. For copolymers with short hydrophilic chains, shear-induced disruption of association complexes was found at higher temperatures, whereas for hairy micelles augmented shear flow promoted the growth of complexes.
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Affiliation(s)
- Kaizheng Zhu
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
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49
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Thermo-responsiveness of poly(-diethylacrylamide) polymers at the air–water interface: The effect of a hydrophobic block. J Colloid Interface Sci 2008; 327:129-37. [DOI: 10.1016/j.jcis.2008.08.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Revised: 07/28/2008] [Accepted: 08/01/2008] [Indexed: 11/20/2022]
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Zhou K, Lu Y, Li J, Shen L, Zhang G, Xie Z, Wu C. The Coil-to-Globule-to-Coil Transition of Linear Polymer Chains in Dilute Aqueous Solutions: Effect of Intrachain Hydrogen Bonding. Macromolecules 2008. [DOI: 10.1021/ma8019128] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kejin Zhou
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China; The Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, China; and Department of Chemistry, The Chinese University of Hong Kong,Shatin, N.T., Hong Kong, China
| | - Yijie Lu
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China; The Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, China; and Department of Chemistry, The Chinese University of Hong Kong,Shatin, N.T., Hong Kong, China
| | - Junfang Li
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China; The Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, China; and Department of Chemistry, The Chinese University of Hong Kong,Shatin, N.T., Hong Kong, China
| | - Lei Shen
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China; The Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, China; and Department of Chemistry, The Chinese University of Hong Kong,Shatin, N.T., Hong Kong, China
| | - Guangzhao Zhang
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China; The Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, China; and Department of Chemistry, The Chinese University of Hong Kong,Shatin, N.T., Hong Kong, China
| | - Zuowei Xie
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China; The Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, China; and Department of Chemistry, The Chinese University of Hong Kong,Shatin, N.T., Hong Kong, China
| | - Chi Wu
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China; The Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, China; and Department of Chemistry, The Chinese University of Hong Kong,Shatin, N.T., Hong Kong, China
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