1
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Hu N, Gao D, Song F, Yang C, Zhang J, Müller-Buschbaum P, Zhong Q. Effect of Embedded g-C 3N 4 Nanosheets on the Hydration and Thermal Response Behavior of Cross-Linked Thermoresponsive Copolymer Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 38953342 DOI: 10.1021/acs.langmuir.4c01630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
The effect of embedded graphitic carbon nitride (g-C3N4) nanosheets on hydration and thermal response behavior of cross-linked thermoresponsive poly(di(ethylene glycol) methyl ether methacrylate-co-oligo(ethylene glycol) methyl ether methacrylate), abbreviated as P(MA-co-MA300), thin films is probed by white light interferometry. Compared with that of the cross-linked pure P(MA-co-MA300) films, the surface roughness of the cross-linked hybrid films is slightly increased, which is caused by the minor aggregation of g-C3N4 nanosheets during the spin-coating process. After exposure to a water vapor atmosphere, both cross-linked pure and hybrid films can absorb water and swell. However, the introduction of g-C3N4 not only induces a larger hydration extent but also triggers a nonlinear transition behavior upon heating. This prominent difference might be related to the residual hydrophilic groups (-NH2 and N-H) on the surface of g-C3N4 nanosheets, which enhance the interaction and absorption capability for water molecules in the hybrid films. Upon further increasing the amount of embedded g-C3N4 nanosheets in films, more hydrogen bonds are formed and a larger hydration extent of films is observed. To break all of the hydrogen bonds in films, a higher transition temperature (TT) is required. The observed hydration and transition behaviors of hybrid films can be used to design hydrogel-based films for hydrogen evolution or wastewater treatment.
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Affiliation(s)
- Neng Hu
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province & Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
| | - Di Gao
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province & Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
| | - Feihong Song
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province & Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
| | - Chuanqi Yang
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province & Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
| | - Jianqi Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Peter Müller-Buschbaum
- TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Str. 1, 85748 Garching, Germany
- Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Lichtenbergstr. 1, 85748 Garching, Germany
| | - Qi Zhong
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province & Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
- TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Str. 1, 85748 Garching, Germany
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2
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Li Q, Yan F, Texter J. Polymerized and Colloidal Ionic Liquids─Syntheses and Applications. Chem Rev 2024; 124:3813-3931. [PMID: 38512224 DOI: 10.1021/acs.chemrev.3c00429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
The breadth and importance of polymerized ionic liquids (PILs) are steadily expanding, and this review updates advances and trends in syntheses, properties, and applications over the past five to six years. We begin with an historical overview of the genesis and growth of the PIL field as a subset of materials science. The genesis of ionic liquids (ILs) over nano to meso length-scales exhibiting 0D, 1D, 2D, and 3D topologies defines colloidal ionic liquids, CILs, which compose a subclass of PILs and provide a synthetic bridge between IL monomers (ILMs) and micro to macro-scale PIL materials. The second focus of this review addresses design and syntheses of ILMs and their polymerization reactions to yield PILs and PIL-based materials. A burgeoning diversity of ILMs reflects increasing use of nonimidazolium nuclei and an expanding use of step-growth chemistries in synthesizing PIL materials. Radical chain polymerization remains a primary method of making PILs and reflects an increasing use of controlled polymerization methods. Step-growth chemistries used in creating some CILs utilize extensive cross-linking. This cross-linking is enabled by incorporating reactive functionalities in CILs and PILs, and some of these CILs and PILs may be viewed as exotic cross-linking agents. The third part of this update focuses upon some advances in key properties, including molecular weight, thermal properties, rheology, ion transport, self-healing, and stimuli-responsiveness. Glass transitions, critical solution temperatures, and liquidity are key thermal properties that tie to PIL rheology and viscoelasticity. These properties in turn modulate mechanical properties and ion transport, which are foundational in increasing applications of PILs. Cross-linking in gelation and ionogels and reversible step-growth chemistries are essential for self-healing PILs. Stimuli-responsiveness distinguishes PILs from many other classes of polymers, and it emphasizes the importance of segmentally controlling and tuning solvation in CILs and PILs. The fourth part of this review addresses development of applications, and the diverse scope of such applications supports the increasing importance of PILs in materials science. Adhesion applications are supported by ionogel properties, especially cross-linking and solvation tunable interactions with adjacent phases. Antimicrobial and antifouling applications are consequences of the cationic nature of PILs. Similarly, emulsion and dispersion applications rely on tunable solvation of functional groups and on how such groups interact with continuous phases and substrates. Catalysis is another significant application, and this is an historical tie between ILs and PILs. This component also provides a connection to diverse and porous carbon phases templated by PILs that are catalysts or serve as supports for catalysts. Devices, including sensors and actuators, also rely on solvation tuning and stimuli-responsiveness that include photo and electrochemical stimuli. We conclude our view of applications with 3D printing. The largest components of these applications are energy related and include developments for supercapacitors, batteries, fuel cells, and solar cells. We conclude with our vision of how PIL development will evolve over the next decade.
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Affiliation(s)
- Qi Li
- Department of Materials Science, School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, Jiangsu, PR China
| | - Feng Yan
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, PR China
| | - John Texter
- Strider Research Corporation, Rochester, New York 14610-2246, United States
- School of Engineering, Eastern Michigan University, Ypsilanti, Michigan 48197, United States
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3
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Engel N, Hoffmann T, Behrendt F, Liebing P, Weber C, Gottschaldt M, Schubert US. Cryogels Based on Poly(2-oxazoline)s through Development of Bi- and Trifunctional Cross-Linkers Incorporating End Groups with Adjustable Stability. Macromolecules 2024; 57:2915-2927. [PMID: 38560346 PMCID: PMC10977347 DOI: 10.1021/acs.macromol.3c02030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 02/19/2024] [Accepted: 02/22/2024] [Indexed: 04/04/2024]
Abstract
1,4-Bis(iodomethyl)benzene and 1,3,5-tris(iodomethyl)benzene were used as initiators for the cationic ring-opening polymerization (CROP) of 2-ethyl-2-oxazoline (EtOx) and its copolymerization with tert-butyl (3-(4,5-dihydrooxazol-2-yl)propyl)carbamate (BocOx) or methyl 3-(4,5-dihydrooxazol-2-yl)propanoate (MestOx). Kinetic studies confirmed the applicability of these initiators. Termination with suitable nucleophiles resulted in two- and three-armed cross-linkers featuring acrylate, methacrylate, piperazine-acrylamide, and piperazine-methacrylamide as polymerizable ω-end groups. Matrix-assisted laser desorption/ionization mass spectrometry and nuclear magnetic resonance (NMR) spectroscopy confirmed the successful attachment of the respective ω-end groups at all initiation sites for every prepared cross-linkers. Except for acrylate, each ω-end group remained stable during deprotection of BocOx containing cross-linkers. The cryogels were prepared using EtOx-based cross-linkers, as confirmed by solid-state NMR spectroscopy, scanning electron microscopy, and thermogravimetric analysis. Stability tests revealed a complete dissolution of the acrylate-containing gels at pH = 14, whereas the piperazine-acrylamide-based cryogels featured excellent hydrolytic stability.
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Affiliation(s)
- Nora Engel
- Laboratory
of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University at Jena, Humboldtstraße 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich
Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Tim Hoffmann
- Laboratory
of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University at Jena, Humboldtstraße 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich
Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Florian Behrendt
- Laboratory
of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University at Jena, Humboldtstraße 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich
Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Phil Liebing
- Institute
of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University at Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Christine Weber
- Laboratory
of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University at Jena, Humboldtstraße 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich
Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Michael Gottschaldt
- Laboratory
of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University at Jena, Humboldtstraße 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich
Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory
of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University at Jena, Humboldtstraße 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich
Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
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Belthle T, Lantzius-Beninga M, Pich A. Pre- and post-functionalization of thermoresponsive cationic microgels with ionic liquid moieties carrying different counterions. Polym Chem 2023. [DOI: 10.1039/d2py01477g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We investigate the effect of different anions on the temperature-dependent solution properties of poly(N-vinylcaprolactam) microgels carrying alkylated ionic liquid vinylimidazolium moieties synthesized by a pre- and post-functionalization approach.
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Affiliation(s)
- Thomke Belthle
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074 Aachen, Germany
- Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
| | - Marcus Lantzius-Beninga
- Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
| | - Andrij Pich
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074 Aachen, Germany
- Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
- Aachen Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Brightlands Chemelot Campus, Urmonderbaan 22, 6167 RD Geleen, The Netherlands
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5
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Wang J, Pan Z, Liu J, Shao Q, Liang Y, Huang S, Jin W, Li Z, Zhang Z, Ye C, Chen Y, Wei P, Wang Y, He Y, Xia Y. Thermoresponsive homo-polymeric ionic liquid as molecular transporters via tailoring interchain π-π interactions and its unique Temp-resistance behavior during ions pairing. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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6
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Kar M, Anas M, Singh A, Basak A, Sen P, Mandal TK. Ion-/Thermo-Responsive fluorescent perylene-poly(ionic liquid) conjugates: One-pot microwave synthesis, self-aggregation and biological applications. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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7
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Polyoxazoline: A review article from polymerization to smart behaviors and biomedical applications. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111484] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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8
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Zhang J, Li S, Wang Z, Liu P, Zhao Y. Multitunable Thermoresponsive and Aggregation Behaviors of Linear and Cyclic Polyacrylamide Copolymers Comprising Heterofunctional Y Junctions. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00794] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jian Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Siyu Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Zhigang Wang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Peng Liu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Youliang Zhao
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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9
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Jiang Y, Li G, Yang C, Kong F, Yuan Z. Multiresponsive Cellulose Nanocrystal Cross-Linked Copolymer Hydrogels for the Controlled Release of Dyes and Drugs. Polymers (Basel) 2021; 13:1219. [PMID: 33918822 PMCID: PMC8070268 DOI: 10.3390/polym13081219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/03/2021] [Accepted: 04/06/2021] [Indexed: 11/16/2022] Open
Abstract
Multiresponsive hydrogels have attracted tremendous interest due to their promising applications in tissue engineering, wearable devices, and flexible electronics. In this work, we report a multiresponsive upper critical solution temperature (UCST) composite hydrogel based on poly (acrylic acid-co-acrylamide), PAAc-co-PAAm, sequentially cross-linked by acid-hydrolysis cellulose nanocrystals (CNCs). Scanning electron microscopy (SEM) observations demonstrated that the hydrogels are formed by densely cross-linked porous structures. The PAAc/PAAm/CNC hybrid hydrogels exhibit swelling and shrinking properties that can be induced by multiple stimuli, including temperature, pH, and salt concentration. The driving force of the volume transition is the formation and dissociation of hydrogen bonds in the hydrogels. A certain content of CNCs can greatly enhance the shrinkage capability and mechanical strength of the hybrid hydrogels, but an excess addition may impair the contractility of the hydrogel. Furthermore, the hydrogels can be used as a matrix to adsorb dyes, such as methylene blue (MB), for water purification. MB may be partly discharged from hydrogels by saline solutions, especially by those with high ionic strength. Notably, through temperature-controlled hydrogel swelling and shrinking, doxorubicin hydrochloride (DOX-HCl) can be controllably adsorbed and released from the prepared hydrogels.
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Affiliation(s)
- Yuchen Jiang
- Key Laboratory of Fine Chemicals in Universities of Shandong, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Y.J.); (C.Y.)
| | - Guihua Li
- Key Laboratory of Fine Chemicals in Universities of Shandong, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Y.J.); (C.Y.)
| | - Chenyu Yang
- Key Laboratory of Fine Chemicals in Universities of Shandong, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Y.J.); (C.Y.)
| | - Fangong Kong
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China;
| | - Zaiwu Yuan
- Key Laboratory of Fine Chemicals in Universities of Shandong, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Y.J.); (C.Y.)
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China;
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10
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Jana S, Uchman M. Poly(2-oxazoline)-based stimulus-responsive (Co)polymers: An overview of their design, solution properties, surface-chemistries and applications. Prog Polym Sci 2020. [DOI: 10.1016/j.progpolymsci.2020.101252] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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11
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Banerjee P, Anas M, Jana S, Mandal TK. Recent developments in stimuli-responsive poly(ionic liquid)s. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02091-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Banerjee P, Jana S, Mandal TK. Coulomb interaction-driven UCST in poly(ionic liquid) random copolymers. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109747] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Anas M, Jana S, Mandal TK. Vesicular assemblies of thermoresponsive amphiphilic polypeptide copolymers for guest encapsulation and release. Polym Chem 2020. [DOI: 10.1039/d0py00135j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Thermoresponsive amphiphilic polypeptide copolymers are synthesized via different polymerization techniques for their self-assembly into vesicular aggregates for guest encapsulation and release.
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Affiliation(s)
- Mahammad Anas
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
| | - Somdeb Jana
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
| | - Tarun K. Mandal
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
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14
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Poly(2-oxazoline) macromonomers as building blocks for functional and biocompatible polymer architectures. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109258] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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15
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16
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Ding L, Zhang P, Fu C, Yin J, Mao Y, Liu N, Li S, Yang C, Zhao R, Deng K. Synthesis of Temperature and Light Sensitive Copolymers with Controlled Aggregation during Phase Transitions. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Lan Ding
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
| | - Pengfei Zhang
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
| | - Congcong Fu
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
| | - Jialin Yin
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
| | - Yongwang Mao
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
| | - Na Liu
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
| | - Shihua Li
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
| | - Chunying Yang
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
| | - Ronghui Zhao
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
| | - Kuilin Deng
- College of Chemistry & Environmental ScienceAffiliated HospitalHebei University Baoding 071002 China
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17
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Baddam V, Missonen R, Hietala S, Tenhu H. Molecular Mass Affects the Phase Separation of Aqueous PEG-Polycation Block Copolymer. Macromolecules 2019; 52:6514-6522. [PMID: 31543553 PMCID: PMC6748676 DOI: 10.1021/acs.macromol.9b01327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/08/2019] [Indexed: 11/30/2022]
Abstract
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Mechanisms of the phase separation
and remixing of cationic PEG-containing
block copolymers have been investigated in aqueous lithium triflate
solutions. The polycation was poly(vinylbenzyl trimethylammonium triflate).
We have previously reported on one such block copolymer, which upon
cooling of a hot clear solution first underwent phase separation into
a turbid colloid and, later, partially cleared again with further
cooling. To better understand the balance of various interactions
in the solutions/dispersions, a series of polymers with varying DP
of the cationic block was synthesized. From one of the polymers, the
alkyl end group (a fragment of the chain transfer agent) was removed.
The length of the cationic block affected critically the behavior,
but the hydrophobic end group had a minimal effect. Polymers with
a short cationic block turn cloudy and partially clear again during
a temperature decrease, whereas those with a long cationic block phase
separate and slowly precipitate and remix only when heated. Phase
separation takes place via particle formation, and we suggest different
mechanisms for colloidal stabilization of particles composed of short
or long chains.
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Affiliation(s)
- Vikram Baddam
- Department of Chemistry, University of Helsinki, PB 55, FIN-00014 Helsinki, Finland
| | - Reetta Missonen
- Department of Chemistry, University of Helsinki, PB 55, FIN-00014 Helsinki, Finland
| | - Sami Hietala
- Department of Chemistry, University of Helsinki, PB 55, FIN-00014 Helsinki, Finland
| | - Heikki Tenhu
- Department of Chemistry, University of Helsinki, PB 55, FIN-00014 Helsinki, Finland
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18
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Zheng Z, Zhang L, Ling Y, Tang H. Triblock copolymers containing UCST polypeptide and poly(propylene glycol): Synthesis, thermoresponsive properties, and modification of PVA hydrogel. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.03.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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19
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Jana S, Anas M, Maji T, Banerjee S, Mandal TK. Tryptophan-based styryl homopolymer and polyzwitterions with solvent-induced UCST, ion-induced LCST and pH-induced UCST. Polym Chem 2019. [DOI: 10.1039/c8py01512k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A multi-stimuli responsive tryptophan-based styryl homopolymer and polyzwitterions with solvent-induced UCST, ion-induced LCST and pH-induced UCST under different conditions are presented.
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Affiliation(s)
- Somdeb Jana
- Polymer Science Unit
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Mahammad Anas
- Polymer Science Unit
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Tanmoy Maji
- Polymer Science Unit
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Sanjib Banerjee
- Polymer Science Unit
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Tarun K. Mandal
- Polymer Science Unit
- School of Chemical Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
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