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Farias-Mancilla B, Balestri A, Zhang J, Frielinghaus H, Berti D, Montis C, Destarac M, Schubert US, Guerrero-Sanchez C, Harrisson S, Lonetti B. Morphology and thermal transitions of self-assembled NIPAM-DMA copolymers in aqueous media depend on copolymer composition profile. J Colloid Interface Sci 2024; 662:99-108. [PMID: 38340518 DOI: 10.1016/j.jcis.2024.02.032] [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: 10/13/2023] [Revised: 01/18/2024] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
HYPOTHESIS There is a lack of understanding of the interplay between the copolymer composition profile and thermal transition observed in aqueous solutions of N-isopropyl acrylamide (NIPAM) copolymers, as well as the correlation between this transition and the formation and structure of copolymer self-assemblies. EXPERIMENTS For this purpose, we investigated the response of five copolymers with the same molar mass and chemical composition, but with different composition profile in aqueous solution against temperature. Using complementary analytical techniques, we probed structural properties at different length scales, from the molecular scale with Nuclear Magnetic Resonance (NMR) to the colloidal scale with Dynamic Light Scattering (DLS) and Small Angle Neutron Scattering (SANS). FINDINGS NMR and SANS investigations strengthen each other and allow a clear picture of the change of copolymer solubility and related copolymer self-assembly as a function of temperature. At the molecular scale, dehydrating NIPAM units drag N,N-dimethyl acrylamide (DMA) moieties with them in a gradual collapse of the copolymer chain; this induces a morphological transition of the self-assemblies from star-like nanostructures to crew-cut micelles. Interestingly, the transition spans a temperature range which depends on the monomer distribution profile in the copolymer chain, with the asymmetric triblock copolymer specimen revealing the broadest one. We show that the broad morphological transitions associated with gradient copolymers can be mimicked and even surpassed by the use of stepwise gradient (asymmetric) copolymers, which can be more easily and reproducibly synthesized than linear gradient copolymers.
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Affiliation(s)
- Barbara Farias-Mancilla
- Laboratoire Softmat, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, France
| | - Arianna Balestri
- Department of Chemistry "Ugo Schiff", University of Florence and CSGI, Florence, Italy
| | - Junliang Zhang
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Jena, Germany
| | - Henrich Frielinghaus
- Forschungszentrum Jülich GmbH, Jülich Center for Neutron Science at Heinz Maier-Leibnitz Zentrum, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Debora Berti
- Department of Chemistry "Ugo Schiff", University of Florence and CSGI, Florence, Italy
| | - Costanza Montis
- Department of Chemistry "Ugo Schiff", University of Florence and CSGI, Florence, Italy
| | - Mathias Destarac
- Laboratoire Softmat, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, France
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Jena, Germany
| | - Carlos Guerrero-Sanchez
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Jena, Germany.
| | - Simon Harrisson
- LCPO, CNRS/Bordeaux-INP/Université de Bordeaux, Pessac, France.
| | - Barbara Lonetti
- Laboratoire Softmat, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, France.
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2
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Linn JD, Rodriguez FA, Calabrese MA. Cosolvent incorporation modulates the thermal and structural response of PNIPAM/silyl methacrylate copolymers. SOFT MATTER 2024; 20:3322-3336. [PMID: 38536224 DOI: 10.1039/d4sm00246f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
Polymers functionalized with inorganic silane groups have been used in wide-ranging applications due to the silane reactivity, which enables formation of covalently-crosslinked polymeric structures. Utilizing stimuli-responsive polymers in these hybrid systems can lead to smart and tunable behavior for sensing, drug delivery, and optical coatings. Previously, the thermoresponsive polymer poly(N-isopropyl acrylamide) (PNIPAM) functionalized with 3-(trimethoxysilyl)propyl methacrylate (TMA) demonstrated unique aqueous self-assembly and optical responses following temperature elevation. Here, we investigate how cosolvent addition, particularly ethanol and N,N-dimethyl formamide (DMF), impacts these transition temperatures, optical clouding, and structure formation in NIPAM/TMA copolymers. Versus purely aqueous systems, these solvent mixtures can introduce additional phase transitions and can alter the two-phase region boundaries based on temperature and solvent composition. Interestingly, TMA incorporation strongly alters phase boundaries in the water-rich regime for DMF-containing systems but not for ethanol-containing systems. Cosolvent species and content also alter the aggregation and assembly of NIPAM/TMA copolymers, but these effects depend on polymer architecture. For example, localizing the TMA towards one chain end in 'blocky' domains leads to formation of uniform micelles with narrow dispersities above the cloud point for certain solvent compositions. In contrast, polydisperse aggregates form in random copolymer and PNIPAM homopolymer solutions - the size of which depends on solvent composition. The resulting optical responses and thermoreversibility also depend strongly on cosolvent content and copolymer architecture. Cosolvent incorporation thus increases the versatility of inorganic-functionalized responsive polymers for diverse applications by providing a simple way to tune the structure size and optical response.
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Affiliation(s)
- Jason D Linn
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Fabian A Rodriguez
- Department of Mechanical Engineering, The University of Texas Rio Grande Valley, Edinburg, TX 78539, USA
| | - Michelle A Calabrese
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
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3
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Xue X, Wang F, Shi M, Khan FI. Synthesis of Thermo-Responsive Monofunctionalized Diblock Copolymer Worms. Polymers (Basel) 2023; 15:4590. [PMID: 38231987 PMCID: PMC10708438 DOI: 10.3390/polym15234590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 01/19/2024] Open
Abstract
Poly(glycerol monomethacrylate)-block-poly(2-hydroxypropyl methacrylate) (PGMA-PHPMA) with worm-like morphology is a typical example of reversible addition-fragmentation chain transfer (RAFT) dispersion polymerized thermo-responsive copolymer via polymerization-induced self-assembly (PISA) in aqueous solution. Chain transfer agents (CTAs) are the key component in controlling RAFT, the structures of which determine the end functional groups of the polymer chain. It is therefore of interest to monofunctionalize the polymers via CTA moiety, for bioactive functionality conjugation and in the meantime maintain the precisely controlled morphology of the copolymers and the related property. In this work, a newly designed CTA 5-(2-(tert-butoxycarbonylamino) ethylamino)-2-cyano-5-oxopentan-2-yl benzodithioate (t-Boc CPDB) was synthesized and used for the RAFT polymerization of PGMA45-PHPMA120. Subsequently, PGMA45-PHPMA120 copolymers with primary amine, maleimide, and reduced L-glutathione (a tripeptide) monofunctionalized terminals were synthesized via deprotection and conjugation reactions. These monofunctionalized copolymers maintain worm-like morphology and thermo-responsive property in aqueous solution (10% w/v), as confirmed by the transmission electron microscopy (TEM) images, and the observation of the phase transition behavior in between 4 °C and room temperature (~20 °C), respectively. Summarily, a range of thermo-responsive monofunctionalized PGMA45-PHPMA120 diblock copolymer worms were successfully synthesized, which are expected to offer potential biomedical applications, such as in polymer therapeutics, drug delivery, and diagnostics.
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Affiliation(s)
- Xuan Xue
- Department of Chemistry, School of Science, Xi’an Jiaotong-Liverpool University, Suzhou 215123, China; (F.W.); (M.S.)
| | - Feifei Wang
- Department of Chemistry, School of Science, Xi’an Jiaotong-Liverpool University, Suzhou 215123, China; (F.W.); (M.S.)
| | - Minhao Shi
- Department of Chemistry, School of Science, Xi’an Jiaotong-Liverpool University, Suzhou 215123, China; (F.W.); (M.S.)
| | - Faez Iqbal Khan
- Department of Biological Sciences, School of Science, Xi’an Jiaotong-Liverpool University, Suzhou 215123, China;
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4
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Bowman JI, Eades CB, Vratsanos MA, Gianneschi NC, Sumerlin BS. Ultrafast Xanthate-Mediated Photoiniferter Polymerization-Induced Self-Assembly (PISA). Angew Chem Int Ed Engl 2023; 62:e202309951. [PMID: 37793989 DOI: 10.1002/anie.202309951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 09/12/2023] [Accepted: 10/04/2023] [Indexed: 10/06/2023]
Abstract
Polymerization-induced self-assembly (PISA) is a powerful technique for preparing block copolymer nanostructures. Recently, efforts have been focused on applying photochemistry to promote PISA due to the mild reaction conditions, low cost, and spatiotemporal control that light confers. Despite these advantages, chain-end degradation and long reaction times can mar the efficacy of this process. Herein, we demonstrate the use of ultrafast photoiniferter PISA to produce polymeric nanostructures. By exploiting the rapid photolysis of xanthates, near-quantitative monomer conversion can be achieved within five minutes to prepare micelles, worms, and vesicles at various core-chain lengths, concentrations, or molar compositions.
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Affiliation(s)
- Jared I Bowman
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Cabell B Eades
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Maria A Vratsanos
- Department of Materials Science & Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Nathan C Gianneschi
- Department of Materials Science & Engineering, Northwestern University, Evanston, IL 60208, USA
- International Institute for Nanotechnology, Simpson-Querrey Institute, Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Department of Chemistry, Department of Biomedical Engineering, Department of Pharmacology, Northwestern University, Evanston, IL 60208, USA
| | - Brent S Sumerlin
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
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5
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Prause A, Hechenbichler M, Schmidt RF, Simon M, Prévost S, Cavalcanti LP, Talmon Y, Laschewsky A, Gradzielski M. Rheological Control of Aqueous Dispersions by Thermoresponsive BAB* Copolymers of Different Architectures. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Albert Prause
- FG Physical Chemistry/Molecular Material Science, Technische Universität Berlin, Straße des 17. Juni 135, Berlin10623, Germany
| | - Michelle Hechenbichler
- Department of Chemistry, Universität Potsdam, Karl-Liebknecht-Straße 24−25, Potsdam14476, Germany
| | - Robert F. Schmidt
- FG Physical Chemistry/Molecular Material Science, Technische Universität Berlin, Straße des 17. Juni 135, Berlin10623, Germany
| | - Miriam Simon
- Department of Chemical Engineering and The Russell Berrie Nanotechnology Institute (RBNI), Technion-Israel Institute of Technology, Haifa3200003, Israel
| | - Sylvain Prévost
- Institut Laue−Langevin, DS/LSS, 71 Avenue des Martyrs, CS 20 156, Grenoble Cedex 9F-38042, France
| | - Leide P. Cavalcanti
- ISIS Facility, STFC, Rutherford Appleton Laboratory, Harwell Campus, DidcotOX11 0QX, UK
| | - Yeshayahu Talmon
- Department of Chemical Engineering and The Russell Berrie Nanotechnology Institute (RBNI), Technion-Israel Institute of Technology, Haifa3200003, Israel
| | - André Laschewsky
- Department of Chemistry, Universität Potsdam, Karl-Liebknecht-Straße 24−25, Potsdam14476, Germany
- Fraunhofer Institute of Applied Polymer Research IAP, Geiselbergstraße 69, Potsdam14476, Germany
| | - Michael Gradzielski
- FG Physical Chemistry/Molecular Material Science, Technische Universität Berlin, Straße des 17. Juni 135, Berlin10623, Germany
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6
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Fortenberry AW, Jankoski PE, Stacy EK, McCormick CL, Smith AE, Clemons TD. A Perspective on the History and Current Opportunities of Aqueous RAFT Polymerization. Macromol Rapid Commun 2022; 43:e2200414. [PMID: 35822936 PMCID: PMC10697073 DOI: 10.1002/marc.202200414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/15/2022] [Indexed: 02/06/2023]
Abstract
Reversible addition-fragmentation chain transfer (RAFT) polymerization has proven itself as a powerful polymerization technique affording facile control of molecular weight, molecular weight distribution, architecture, and chain end groups - while maintaining a high level of tolerance for solvent and monomer functional groups. RAFT is highly suited to water as a polymerization solvent, with aqueous RAFT now utilized for applications such as controlled synthesis of ultra-high molecular weight polymers, polymerization induced self-assembly, and biocompatible polymerizations, among others. Water as a solvent represents a non-toxic, cheap, and environmentally friendly alternative to organic solvents traditionally utilized for polymerizations. This, coupled with the benefits of RAFT polymerization, makes for a powerful combination in polymer science. This perspective provides a historical account of the initial developments of aqueous RAFT polymerization at the University of Southern Mississippi from the McCormick Research Group, details practical considerations for conducting aqueous RAFT polymerizations, and highlights some of the recent advances aqueous RAFT polymerization can provide. Finally, some of the future opportunities that this versatile polymerization technique in an aqueous environment can offer are discussed, and it is anticipated that the aqueous RAFT polymerization field will continue to realize these, and other exciting opportunities into the future.
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Affiliation(s)
| | - Penelope E Jankoski
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Evan K Stacy
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Charles L McCormick
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Adam E Smith
- Department of Chemical Engineering, The University of Mississippi, Oxford, MS, 38677, USA
| | - Tristan D Clemons
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA
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7
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Hongyan T, Xuebin W, Jincheng W, Guosheng W. Preparation and properties of potassium alginate soil conditioner microspheres coated with poly(N-isopropyl acrylamide) microgel membrane. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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8
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Sun C, Zhou S, Li J, Qi C, Gao Y. Formation of n-Hexane-in-DMF Nonaqueous Pickering Emulsions: ABC Triblock Worms versus AB Diblock Worms. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10128-10138. [PMID: 35951599 DOI: 10.1021/acs.langmuir.2c01021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nonaqueous Pickering emulsions exhibit promising applications in many industrial areas but have been relatively less studied in the past. In this study, n-hexane-in-DMF nonaqueous Pickering emulsions stabilized by core cross-linked copolymer worms with mixed shells are demonstrated for the first time. Core cross-linked copolymer worms with mixed shells were prepared by seeded reversible addition-fragmentation chain transfer (RAFT) quasi-solution polymerization. Specifically, polystyrene-poly(4-vinylpyridine) (PS-P4VP) diblock copolymer worms were first prepared via RAFT-mediated dispersion polymerization in toluene under the given conditions using PS as both the macro-CTA and the stabilizer block. After the chemical cross-linking of P4VP cores, PS-P4VP diblock copolymer worms were chain-extended with LMA in DMF/toluene (1:9, weight ratio) mixed solvents, producing core cross-linked PS-P4VP-PLMA worms with PS/PLMA mixed shells. The as-prepared core cross-linked PS-P4VP-PLMA worms with mixed PS/PLMA shells were further utilized as Pickering emulsifiers for the generation of nonaqueous n-hexane-in-DMF Pickering emulsions. The emulsifying performances of mixed-shell copolymer worms were compared with those of their spherical and linear analogues with entirely identical chemical compositions as well as PS-P4VP diblock copolymer worm precursors, respectively.
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Affiliation(s)
- Changsheng Sun
- College of Chemistry and Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan, Hunan Province 411105, China
| | - Shujing Zhou
- School of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang Province 154007, China
| | - Jinjing Li
- School of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang Province 154007, China
| | - Chenze Qi
- Key Laboratory of Alternative Technologies for Fine Chemicals Process of Zhejiang Province, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
- School of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang Province 154007, China
| | - Yong Gao
- School of Materials Science & Engineering, Changzhou University, Changzhou, Jiangsu Province 213164, China
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9
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Pasban S, Raissi H. PNIPAM/Hexakis as a thermosensitive drug delivery system for biomedical and pharmaceutical applications. Sci Rep 2022; 12:14363. [PMID: 35999242 PMCID: PMC9399122 DOI: 10.1038/s41598-022-18459-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 08/11/2022] [Indexed: 11/29/2022] Open
Abstract
Many technologies ranging from drug delivery approaches to tissue engineering purposes are beginning to benefit from the unique ability of "smart polymers." As a special case, thermo-sensitive hydrogels have great potential, e.g. in actuators, microfluidics, sensors, or drug delivery systems. Here, the loading of Doxorubicin (DOX) with novel thermo-sensitive polymer N-isopropyl acrylamide (PNIPAM) and its copolymers are investigated in order to increase the Doxorubicin's drug efficacy on the targeted tumor site. Therefore, a rational design accurate based on the use of classical molecular dynamics (MD) and well-tempered metadynamics simulations allows for predicting and understanding the behavior of thermo-responsive polymers in the loading of DOX on Hexakis nano-channel at 298 and 320 K. Furthermore, this work investigates the efficacy of this drug carrier for the release of DOX in response to stimuli like variations in temperature and changes in the physiological pH. The study concludes that the Hexakis-polymer composite is capable of adsorbing the DOX at neutral pH and by increasing the temperature of the simulated systems from 298 to 320 K, the strength of intermolecular attraction decreases. In addition, the obtained results of MD simulation revealed that the dominant interaction between DOX and Hexakis in the DOX/polymer/Hexakis systems is the Lennard-Jones (LJ) term due to the formation of strong π-π interaction between the adsorbate and substrate surface. Obtained results show that a higher aggregation of DMA chains around the Hexakis and the formation of stronger bonds with DOX. The results of the well-tempered metadynamics simulations revealed that the order of insertion of drug and polymer into the system is a determining factor on the fate of the adsorption/desorption process. Overall, our results explain the temperature-dependent behavior of the PNIPAM polymers and the suitability of the polymer-Hexakis carrier for Doxorubicin delivery.
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Affiliation(s)
- Samaneh Pasban
- Department of Chemistry, University of Birjand, Birjand, Iran
| | - Heidar Raissi
- Department of Chemistry, University of Birjand, Birjand, Iran.
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10
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Dau H, Tsogtgerel E, Matyjaszewski K, Harth E. One-For-All Polyolefin Functionalization: Active Ester as Gateway to Combine Insertion Polymerization with ROP, NMP, and RAFT. Angew Chem Int Ed Engl 2022; 61:e202205931. [PMID: 35588082 DOI: 10.1002/anie.202205931] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Indexed: 12/29/2022]
Abstract
This work develops the Polyolefin Active-Ester Exchange (PACE) process to afford well-defined polyolefin-polyvinyl block copolymers. α-Diimine PdII -catalyzed olefin polymerizations were investigated through in-depth kinetic studies in comparison to an analog to establish the critical design that facilitates catalyst activation. Simple transformations lead to a diversity of functional groups forming polyolefin macroinitiators or macro-mediators for various subsequent controlled polymerization techniques. Preparation of block copolymers with different architectures, molecular weights, and compositions was demonstrated with ring-opening polymerization (ROP), nitroxide-mediated polymerization (NMP), and photoiniferter reversible addition-fragmentation chain transfer (PI-RAFT). The significant difference in the properties of polyolefin-polyacrylamide block copolymers was harnessed to carry out polymerization-induced self-assembly (PISA) and study the nanostructure behaviors.
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Affiliation(s)
- Huong Dau
- Department of Chemistry, Center of Excellence in Polymer Chemistry, University of Houston, 3585 Cullen Boulevard, Houston, TX 77030, USA
| | - Enkhjargal Tsogtgerel
- Department of Chemistry, Center of Excellence in Polymer Chemistry, University of Houston, 3585 Cullen Boulevard, Houston, TX 77030, USA
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA
| | - Eva Harth
- Department of Chemistry, Center of Excellence in Polymer Chemistry, University of Houston, 3585 Cullen Boulevard, Houston, TX 77030, USA
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11
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Prause A, Hechenbichler M, von Lospichl B, Feoktystov A, Schweins R, Mahmoudi N, Laschewsky A, Gradzielski M. Aggregation Behavior of Nonsymmetrically End-Capped Thermoresponsive Block Copolymers in Aqueous Solutions: Between Polymer Coils and Micellar States. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Albert Prause
- FG Physical Chemistry/Molecular Material Science, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Michelle Hechenbichler
- Department of Chemistry, Universität Potsdam, Karl-Liebknecht-Straße 24−25, 14476 Potsdam, Germany
| | - Benjamin von Lospichl
- FG Physical Chemistry/Molecular Material Science, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Artem Feoktystov
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstraße 1, 85748 Garching, Germany
| | - Ralf Schweins
- Institut Laue−Langevin, DS/LSS, 71 Avenue des Martyrs, CS 20 156, F-38042 Grenoble Cedex 9, France
| | - Najet Mahmoudi
- ISIS Facility, STFC, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, U.K
| | - André Laschewsky
- Department of Chemistry, Universität Potsdam, Karl-Liebknecht-Straße 24−25, 14476 Potsdam, Germany
- Fraunhofer Institute of Applied Polymer Research IAP, Geiselbergstraße 69, 14476 Potsdam, Germany
| | - Michael Gradzielski
- FG Physical Chemistry/Molecular Material Science, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
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12
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Harth E, Dau H, Tsogtgerel E, Matyjaszewski K. One‐For‐All Polyolefin Functionalization: Active Ester as Gateway to Combine Insertion Polymerization with ROP, NMP, and RAFT. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Eva Harth
- University of Houston Chemistry 406 STL BuildingUnited States 77004 Houston UNITED STATES
| | - Huong Dau
- University of Houston Chemistry UNITED STATES
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13
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Hechenbichler M, Prause A, Gradzielski M, Laschewsky A. Thermoresponsive Self-Assembly of Twofold Fluorescently Labeled Block Copolymers in Aqueous Solution and Microemulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5166-5182. [PMID: 34734729 DOI: 10.1021/acs.langmuir.1c02318] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A nonionic double hydrophilic block copolymer with a long permanently hydrophilic and a small thermoresponsive block is synthesized by reversible addition-fragmentation chain-transfer polymerization (RAFT). By employing a specifically designed chain-transfer agent, the polymer is functionalized with complementary end groups which are suited for Förster resonance energy transfer (FRET). The end group attached to the permanently hydrophilic block of poly(N,N-dimethylacrylamide) pDMAm is designed as a permanently hydrophobic segment ("sticker") comprising a long alkyl chain and the 4-aminonaphthalimide fluorophore. The other end attached to the thermoresponsive block of poly(N-isopropylacrylamide) pNiPAm incorporates a coumarin fluorophore. The temperature-dependent self-assembly of the twofold fluorescently labeled copolymer is studied in pure aqueous solution as well as in an o/w microemulsion by several techniques including turbidimetry, dynamic light scattering (DLS), and fluorescence spectroscopy. It is compared to the behaviors of the analogous twofold-labeled pDMAm and pNiPAm homopolymer references. The findings indicate that the block copolymer behaves as a polymeric surfactant at low temperatures, with one relatively small hydrophobic end block and an extended hydrophilic chain forming "hairy micelles". At elevated temperatures above the LCST phase transition of the pNiPAm block, however, the copolymer behaves as an associative telechelic polymer with two nonsymmetrical hydrophobic end blocks, which do not mix. Thus, instead of a network of bridged "flower micelles", large dynamic aggregates are formed. These are connected alternatingly by the original micellar cores as well as by clusters of the collapsed pNiPAm blocks. This type of structure is even more favored in the o/w microemulsion than in pure aqueous solution, as the microemulsion droplets constitute an attractive anchoring point for the hydrophobic dodecyl sticker but not for the collapsed pNiPAm chains.
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Affiliation(s)
- Michelle Hechenbichler
- Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam-Golm, Germany
| | - Albert Prause
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, FG Physical Chemistry/Molecular Material Science Institute of Chemistry, Technische Universität Berlin, Straße des 17 Juni 124, 10623 Berlin, Germany
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, FG Physical Chemistry/Molecular Material Science Institute of Chemistry, Technische Universität Berlin, Straße des 17 Juni 124, 10623 Berlin, Germany
| | - André Laschewsky
- Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam-Golm, Germany
- Fraunhofer Institute of Applied Polymer Research IAP, Fraunhofer Institute, Geiselbergstr. 69, 14476 Potsdam-Golm, Germany
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14
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Nabiyan A, Max JB, Schacher FH. Double hydrophilic copolymers - synthetic approaches, architectural variety, and current application fields. Chem Soc Rev 2022; 51:995-1044. [PMID: 35005750 DOI: 10.1039/d1cs00086a] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Solubility and functionality of polymeric materials are essential properties determining their role in any application. In that regard, double hydrophilic copolymers (DHC) are typically constructed from two chemically dissimilar but water-soluble building blocks. During the past decades, these materials have been intensely developed and utilised as, e.g., matrices for the design of multifunctional hybrid materials, in drug carriers and gene delivery, as nanoreactors, or as sensors. This is predominantly due to almost unlimited possibilities to precisely tune DHC composition and topology, their solution behavior, e.g., stimuli-response, and potential interactions with small molecules, ions and (nanoparticle) surfaces. In this contribution we want to highlight that this class of polymers has experienced tremendous progress regarding synthesis, architectural variety, and the possibility to combine response to different stimuli within one material. Especially the implementation of DHCs as versatile building blocks in hybrid materials expanded the range of water-based applications during the last two decades, which now includes also photocatalysis, sensing, and 3D inkjet printing of hydrogels, definitely going beyond already well-established utilisation in biomedicine or as templates.
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Affiliation(s)
- Afshin Nabiyan
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller University Jena, Lessingstraße 8, D-07743 Jena, Germany. .,Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, D-07743 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Philosophenweg 7a, 07743 Jena, Germany
| | - Johannes B Max
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller University Jena, Lessingstraße 8, D-07743 Jena, Germany. .,Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, D-07743 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Philosophenweg 7a, 07743 Jena, Germany
| | - Felix H Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller University Jena, Lessingstraße 8, D-07743 Jena, Germany. .,Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, D-07743 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Philosophenweg 7a, 07743 Jena, Germany
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15
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Wang J, Guo M. Thermo-responsive, Mechanically-robust and 3D Printable Supramolecular Hydrogels. Polym Chem 2022. [DOI: 10.1039/d2py00127f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, poly(N-isopropylacrylamide) (PNIPAm) grafted and multi-urea linkage segmented linear polyurethane-urea (PUU) copolymers were synthesized using α-dihydroxyl terminated PNIPAm as chain extender and water as an indirect chain extender,respectively....
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16
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Ionic liquid-containing non-aqueous Pickering emulsions prepared with sterically-stabilized polymer nanoparticles: A highly efficient platform for Knoevenagel reaction. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126995] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Riabtseva A, Ellis SN, Champagne P, Jessop PG, Cunningham MF. CO 2-Responsive Branched Polymers for Forward Osmosis Applications: The Effect of Branching on Draw Solute Properties. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Anna Riabtseva
- Department of Chemical Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada
- Department of Chemistry, Queen’s University, Kingston, ON K7L 3N6, Canada
| | - Sarah N. Ellis
- Department of Chemistry, Queen’s University, Kingston, ON K7L 3N6, Canada
| | - Pascale Champagne
- Department of Chemistry, Queen’s University, Kingston, ON K7L 3N6, Canada
- Department of Civil Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada
- Beaty Water Research Centre, Queen’s University, Kingston, ON K7L 3N6, Canada
- INRS, 490, rue de la Couronne, Québec, QC G1K 9A9, Canada
| | - Philip G. Jessop
- Department of Chemistry, Queen’s University, Kingston, ON K7L 3N6, Canada
| | - Michael F. Cunningham
- Department of Chemical Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada
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Thermally Switchable Electrically Conductive Thermoset rGO/PK Self-Healing Composites. Polymers (Basel) 2021; 13:polym13030339. [PMID: 33494537 PMCID: PMC7865638 DOI: 10.3390/polym13030339] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/07/2021] [Accepted: 01/18/2021] [Indexed: 01/14/2023] Open
Abstract
Among smart materials, self-healing is one of the most studied properties. A self-healing polymer can repair the cracks that occurred in the structure of the material. Polyketones, which are high-performance thermoplastic polymers, are a suitable material for a self-healing mechanism: a furanic pendant moiety can be introduced into the backbone and used as a diene for a temperature reversible Diels-Alder reaction with bismaleimide. The Diels-Alder adduct is formed at around 50 °C and broken at about 120 °C, giving an intrinsic, stimuli-responsive self-healing material triggered by temperature variations. Also, reduced graphene oxide (rGO) is added to the polymer matrix (1.6-7 wt%), giving a reversible OFF-ON electrically conductive polymer network. Remarkably, the electrical conductivity is activated when reaching temperatures higher than 100 °C, thus suggesting applications as electronic switches based on self-healing soft devices.
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Depoorter J, Yan X, Zhang B, Sudre G, Charlot A, Fleury E, Bernard J. All poly(ionic liquid) block copolymer nanoparticles from antagonistic isomeric macromolecular blocks via aqueous RAFT polymerization-induced self-assembly. Polym Chem 2021. [DOI: 10.1039/d0py00698j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
All-poly(ionic liquid) block copolymer nanoparticles are prepared by aqueous RAFT PISA using a couple of isomeric ionic liquid monomers leading to macromolecular building blocks with antagonistic solution behavior in water.
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Affiliation(s)
| | - Xibo Yan
- Univ Lyon
- INSA Lyon
- CNRS
- IMP UMR 5223
- Villeurbanne
| | - Biao Zhang
- Univ Lyon
- INSA Lyon
- CNRS
- IMP UMR 5223
- Villeurbanne
| | - Guillaume Sudre
- Univ Lyon
- Université Claude Bernard Lyon 1
- CNRS
- IMP UMR 5223
- Villeurbanne
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Falireas PG, Ladmiral V, Ameduri B. Synthesis, aqueous solution behavior and self-assembly of a dual pH/thermo-responsive fluorinated diblock terpolymer. Polym Chem 2021. [DOI: 10.1039/d0py01515f] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of fluorinated dual-responsive block terpolymers via sequential reversible addition–fragmentation chain transfer (RAFT) polymerization is presented.
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Brunato S, Mastrotto F, Bellato F, Garofalo M, Göddenhenrich T, Mantovani G, Alexander C, Gross S, Salmaso S, Caliceti P. Thermosensitive "Smart" Surfaces for Biorecognition Based Cell Adhesion and Controlled Detachment. Macromol Biosci 2020; 21:e2000277. [PMID: 33146950 DOI: 10.1002/mabi.202000277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/20/2020] [Indexed: 11/07/2022]
Abstract
The biorecognition-based control of attachment/detachment of MCF-7 cancer cells from polymer-coated surfaces is demonstrated. A glass surface is coated with a thermoresponsive statistical copolymer of poly(N-isopropylacrylamide-co-acrylamide) [p(NIPAm-co-Am)], which is end-capped with the Gly-Arg-Gly-Asp-Ser (GRGDS) peptide, and the hydrophilic polymer poly(ethylene glycol) (PEG). Below the lower critical solution temperature (LCST) of p(NIPAm-co-Am) (38 °C), the copolymers are in the extended conformation, allowing for accessibility of the GRGDS peptides to membrane-associated integrins thus enabling cell attachment. Above the LCST, the p(NIPAm-co-Am) polymers collapse into globular conformations, resulting in the shielding of the GRGDS peptides into the PEG brush with consequent inaccessibility to cell-surface integrins, causing cell detachment. The surface coating is carried out by a multi-step procedure that included: glass surface amination with 3-aminopropyltriethoxysilane; reaction of mPEG5kDa -N-hydroxysuccinimide (NHS) and p(NIPam-co-Am)15.1kDa -bis-NHS with the surface aminopropyl groups and conjugation of GRGDS to the carboxylic acid termini of p(NIPam-co-Am)15.1kDa -COOH. A range of spectrophotometric, surface, and microscopy assays confirmed the identity of the polymer-coated substrates. Competition studies prove that MCF-7 cancer cells are attached via peptide recognition at the coated surfaces according to the mPEG5kDa /p(NIPam-co-Am)15.1kDa -GRGDS molar ratio. These data suggest the system can be exploited to modulate cell integrin/GRGDS binding for controlled cell capture and release.
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Affiliation(s)
- Silvia Brunato
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Francesca Mastrotto
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Federica Bellato
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Mariangela Garofalo
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Thomas Göddenhenrich
- Institute of Physics, Giessen University, Heinrich-Buff-Ring 16, Giessen, 35392, Germany
| | - Giuseppe Mantovani
- Molecular Therapeutics and Formulation Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Cameron Alexander
- Molecular Therapeutics and Formulation Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Silvia Gross
- Department of Chemical Sciences, University of Padova, via F. Marzolo 1, Padova, 35131, Italy
| | - Stefano Salmaso
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Paolo Caliceti
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
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22
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Massi L, Najer A, Chapman R, Spicer CD, Nele V, Che J, Booth MA, Doutch JJ, Stevens MM. Tuneable peptide cross-linked nanogels for enzyme-triggered protein delivery. J Mater Chem B 2020; 8:8894-8907. [PMID: 33026394 PMCID: PMC7613372 DOI: 10.1039/d0tb01546f] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Many diseases are associated with the dysregulated activity of enzymes, such as matrix metalloproteinases (MMPs). This dysregulation can be leveraged in drug delivery to achieve disease- or site-specific cargo release. Self-assembled polymeric nanoparticles are versatile drug carrier materials due to the accessible diversity of polymer chemistry. However, efficient loading of sensitive cargo, such as proteins, and introducing functional enzyme-responsive behaviour remain challenging. Herein, peptide-crosslinked, temperature-sensitive nanogels for protein delivery were designed to respond to MMP-7, which is overexpressed in many pathologies including cancer and inflammatory diseases. The incorporation of N-cyclopropylacrylamide (NCPAM) into N-isopropylacrylamide (NIPAM)-based copolymers enabled us to tune the polymer lower critical solution temperature from 33 to 44 °C, allowing the encapsulation of protein cargo and nanogel-crosslinking at slightly elevated temperatures. This approach resulted in nanogels that were held together by MMP-sensitive peptides for enzyme-specific protein delivery. We employed a combination of cryogenic transmission electron microscopy (cryo-TEM), dynamic light scattering (DLS), small angle neutron scattering (SANS), and fluorescence correlation spectroscopy (FCS) to precisely decipher the morphology, self-assembly mechanism, enzyme-responsiveness, and model protein loading/release properties of our nanogel platform. Simple variation of the peptide linker sequence and combining multiple different crosslinkers will enable us to adjust our platform to target specific diseases in the future.
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Affiliation(s)
- Lucia Massi
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK.
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23
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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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24
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Summers GJ, Motsoeneng TS, Summers CA. RAFT polymerization of styrene mediated by oxazolyl-functionalized trithiocarbonate RAFT agents. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03211-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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25
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Li J, Mizutani S, Sato SI, Narumi A, Haba O, Kawaguchi S, Kikuchi M, Kakuchi T, Shen X. Thermoresponsive properties of poly(N-isopropyl,N-methylacrylamide) and its statistical and block copolymers with poly(N,N-dimethylacrylamide) prepared by B(C6F5)3-catalyzed group transfer polymerization. Polym Chem 2020. [DOI: 10.1039/d0py00015a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
B(C6F5)3-catalyzed GTP synthesis of poly(N-isopropyl,N-methylacrylamide) as a new thermoresponsive material.
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Affiliation(s)
- Jian Li
- Research Center for Polymer Materials
- School of Materials Science and Engineering
- Changchun University of Science and Technology
- Jilin
- China
| | - Shunsuke Mizutani
- Division of Applied Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Shin-ichiro Sato
- Division of Applied Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Atsushi Narumi
- Graduate School of Organic Materials Science
- Yamagata University
- Yonezawa
- Japan
| | - Osamu Haba
- Graduate School of Organic Materials Science
- Yamagata University
- Yonezawa
- Japan
| | - Seigou Kawaguchi
- Graduate School of Organic Materials Science
- Yamagata University
- Yonezawa
- Japan
| | | | - Toyoji Kakuchi
- Research Center for Polymer Materials
- School of Materials Science and Engineering
- Changchun University of Science and Technology
- Jilin
- China
| | - Xiande Shen
- Research Center for Polymer Materials
- School of Materials Science and Engineering
- Changchun University of Science and Technology
- Jilin
- China
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27
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Zhao X, Shan G. PSMA-b-PNIPAM copolymer micelles with both a hydrophobic segment and a hydrophilic terminal group: synthesis, micelle formation, and characterization. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04556-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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28
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Sponchioni M, Capasso Palmiero U, Moscatelli D. Thermo-responsive polymers: Applications of smart materials in drug delivery and tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 102:589-605. [PMID: 31147031 DOI: 10.1016/j.msec.2019.04.069] [Citation(s) in RCA: 173] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/02/2019] [Accepted: 04/22/2019] [Indexed: 01/01/2023]
Abstract
Synthetic polymers are attracting great attention in the last decades for their use in the biomedical field as nanovectors for controlled drug delivery, hydrogels and scaffolds enabling cell growth. Among them, polymers able to respond to environmental stimuli have been recently under growing consideration to impart a "smart" behavior to the final product, which is highly desirable to provide it with a specific dynamic and an advanced function. In particular, thermo-responsive polymers, materials able to undergo a discontinuous phase transition or morphological change in response to a temperature variation, are among the most studied. The development of the so-called controlled radical polymerization techniques has paved the way to a high degree of engineering for the polymer architecture and properties, which in turn brought to a plethora of sophisticated behaviors for these polymers by simply switching the external temperature. These can be exploited in many different fields, from separation to advanced optics and biosensors. The aim of this review is to critically discuss the latest advances in the development of thermo-responsive materials for biomedical applications, including a highly controlled drug delivery, mediation of cell growth and bioseparation. The focus is on the structural and design aspects that are required to exploit such materials for cutting-edge applications in the biomedical field.
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Affiliation(s)
- Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy; Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland.
| | - Umberto Capasso Palmiero
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Davide Moscatelli
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy
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ABA-type triblock copolymer micellar system with lower critical solution temperature-type sol-gel transition. J Colloid Interface Sci 2019; 545:220-230. [PMID: 30889413 DOI: 10.1016/j.jcis.2019.03.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 03/11/2019] [Accepted: 03/12/2019] [Indexed: 01/17/2023]
Abstract
A temperature sensitive sol-gel transition induced by the self-assembly of amphiphilic copolymers and its application in industry have been the objects of increasing study. We demonstrate here a two-step, reversible addition-fragmentation chain transfer (RAFT) polymerization of an ABA-type copolymer consisting of poly(N,N-dimethylacrylamide)-b-poly(diacetone acrylamide)-b-poly(N,N-dimethylacrylamide) (PDMAA-b-PDAAM-b-PDMAA). This copolymer can be easily dispersed in water, and this dispersion is critical for its lower critical solution temperature (LCST)-type sol-gel transition, which was monitored using dynamic light scattering (DLS), transmission electron microscopy (TEM), and rheology analysis, in addition to temperature-dependent 1H nuclear magnetic resonance (1H NMR) and Fourier transform infrared spectroscopy (FTIR). Results revealed an abnormal sphere-to-worm micellar transition of this ABA copolymer at the LCST point, which could be affected by the length of the PDAAM block (B-block), the length as well as the distribution of the PDMAA block (A-block), and the concentration of the copolymer dispersion. Thus, copolymer dispersion could be feasibly used for drug loading at a low temperature, which could then be transformed into a gel at an elevated temperature. The loading and controllable release of the model drug of paracetamol into and out of a copolymer gel was further determined. The sustained release behavior was also studied using the Rigter-Peppas model.
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Hu H, Yan X, Wang H, Tanaka J, Wang M, You W, Li Z. Perfluorocarbon-based O 2 nanocarrier for efficient photodynamic therapy. J Mater Chem B 2019; 7:1116-1123. [PMID: 32254779 DOI: 10.1039/c8tb01844h] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Tumor hypoxia is considered as one of the major factors that limit the efficiency of photodynamic therapy (PDT), in which oxygen (O2) is needed to generate singlet oxygen (1O2) for cell destruction. Inspired by the excellent O2 carrying ability of perfluorocarbon molecules in artificial blood, we prepared a series of polymer micelles with a perfluorocarbon core to carry both photo-sensitizer and O2 to the tumor site, aiming to improve PDT efficiency. We found that the accelerated generation of 1O2 correlated with the increased perfluorocarbon amount in solution. In vitro cell study further showed that the new perfluorocarbon formulation not only improved the production of 1O2, leading to enhanced photodynamic therapy efficiency, but also significantly reduced cell toxicity when compared with the one without these perfluoro units. This work provides a new option for improving PDT efficiency with the new perfluorocarbon-incorporated nanoplatform.
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Affiliation(s)
- Huamin Hu
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, USA.
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He K, Li J, Shen Y, Yu Y. pH-Responsive polyelectrolyte coated gadolinium oxide-doped mesoporous silica nanoparticles (Gd2O3@MSNs) for synergistic drug delivery and magnetic resonance imaging enhancement. J Mater Chem B 2019; 7:6840-6854. [PMID: 31609370 DOI: 10.1039/c9tb01654f] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Theranostic platforms that combine therapeutic and imaging modalities have received increasing interest.
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Affiliation(s)
- Kewu He
- Department of Radiology
- The First Affiliated Hospital of Anhui Medical University
- Hefei
- China
| | - Jiajia Li
- Central Laboratory
- The First Affiliated Hospital of Anhui Medical University
- Hefei
- China
| | - Yuxian Shen
- School of Basic Medical Sciences
- Anhui Medical University
- Hefei
- China
| | - Yongqiang Yu
- Department of Radiology
- The First Affiliated Hospital of Anhui Medical University
- Hefei
- China
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33
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One step synthesis of monodisperse thiol-ene clickable polymer microspheres and application on biological functionalization. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.11.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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34
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Ohnsorg ML, Ting JM, Jones SD, Jung S, Bates FS, Reineke TM. Tuning PNIPAm self-assembly and thermoresponse: roles of hydrophobic end-groups and hydrophilic comonomer. Polym Chem 2019. [DOI: 10.1039/c9py00180h] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Systematic study of hydrophobic and hydrophilic modifications to poly(N-isopropylacrylamide) elucidates design rules for control over cloud point and aqueous self-assembly.
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Affiliation(s)
| | - Jeffrey M. Ting
- Departments of Chemical Engineering and Materials Science
- University of Minnesota
- Minneapolis
- USA
| | - Seamus D. Jones
- Departments of Chemical Engineering and Materials Science
- University of Minnesota
- Minneapolis
- USA
| | - Seyoung Jung
- Departments of Chemical Engineering and Materials Science
- University of Minnesota
- Minneapolis
- USA
| | - Frank S. Bates
- Departments of Chemical Engineering and Materials Science
- University of Minnesota
- Minneapolis
- USA
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36
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Skandalis A, Pispas S. pH- and thermo-responsive solution behavior of amphiphilic, linear triblock terpolymers. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.10.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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37
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Yang Y, Chen P, Cao Y, Huang Z, Zhu G, Xu Z, Dai X, Chen S, Miao B, Yan LT. How Implementation of Entropy in Driving Structural Ordering of Nanoparticles Relates to Assembly Kinetics: Insight into Reaction-Induced Interfacial Assembly of Janus Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9477-9488. [PMID: 30016871 DOI: 10.1021/acs.langmuir.8b01378] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The ability to understand and exploit entropic contributions to ordering transition is of essential importance in the design of self-assembling systems with well-controlled structures. However, much less is known about the role of assembly kinetics in entropy-driven phase behaviors. Here, by combining computer simulations and theoretical analysis, we report that the implementation of entropy in driving phase transition significantly depends on the kinetic process in the reaction-induced self-assembly of newly designed nanoparticle systems. In particular, such systems comprise binary Janus nanoparticles at the fluid-fluid interface and undergo phase transition driven by entropy and controlled by the polymerization reaction initiated from the surfaces of just one component of nanoparticles. Our simulations demonstrate that the competition between the reaction rate and the diffusive dynamics of nanoparticles governs the implementation of entropy in driving the phase transition from randomly mixed phase to intercalated phase in these interfacial nanoparticle mixtures, which thereby results in diverse kinetic pathways. At low reaction rates, the transition exhibits abrupt jump in the mixing parameter, in a similar way to first-order, equilibrium phase transition. Increasing the reaction rate diminishes the jumps until the transitions become continuous, behaving as a second-order-like phase transition, where a critical exponent, characterizing the transition, can be identified. We finally develop an analytical model of the blob theory of polymer chains to complement the simulation results and reveal essential scaling laws of the entropy-driven phase behaviors. In effect, our results allow for further opportunities to amplify the entropic contributions to the materials design via kinetic control.
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Affiliation(s)
- Ye Yang
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Pengyu Chen
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Yufei Cao
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Zihan Huang
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Guolong Zhu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Ziyang Xu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Xiaobin Dai
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Shi Chen
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Bing Miao
- College of Materials Science and Opto-Electronic Technology , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Li-Tang Yan
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
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38
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Mellot G, Beaunier P, Guigner JM, Bouteiller L, Rieger J, Stoffelbach F. Beyond Simple AB Diblock Copolymers: Application of Bifunctional and Trifunctional RAFT Agents to PISA in Water. Macromol Rapid Commun 2018; 40:e1800315. [DOI: 10.1002/marc.201800315] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 05/19/2018] [Indexed: 12/18/2022]
Affiliation(s)
- Gaëlle Mellot
- Sorbonne Université; CNRS; Institut Parisien de Chimie Moléculaire; UMR 8232; Equipe chimie des polymères; F-75252 Paris Cedex 05 France
| | - Patricia Beaunier
- Sorbonne Université; CNRS; Laboratoire de Réactivité de Surface; UMR 7197 F-75252 Paris Cedex 05 France
| | - Jean-Michel Guigner
- Sorbonne Université; CNRS; Institut de Minéralogie; de Physique des Matériaux et de Cosmochimie; UMR 7590 - IRD - MNHN F-75005 Paris France
| | - Laurent Bouteiller
- Sorbonne Université; CNRS; Institut Parisien de Chimie Moléculaire; UMR 8232; Equipe chimie des polymères; F-75252 Paris Cedex 05 France
| | - Jutta Rieger
- Sorbonne Université; CNRS; Institut Parisien de Chimie Moléculaire; UMR 8232; Equipe chimie des polymères; F-75252 Paris Cedex 05 France
| | - François Stoffelbach
- Sorbonne Université; CNRS; Institut Parisien de Chimie Moléculaire; UMR 8232; Equipe chimie des polymères; F-75252 Paris Cedex 05 France
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39
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Li B, Thompson ME. Phase transition in amphiphilic poly(N-isopropylacrylamide): controlled gelation. Phys Chem Chem Phys 2018; 20:13623-13631. [PMID: 29737361 DOI: 10.1039/c8cp01609g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Thermally reversible gelation of polymers is of converging interest in both the fundamental research and practical biomedical or pharmaceutical applications. While the block structure is widely reported to favor gelation, there are few studies regarding the behavior of amphiphilic random copolymers. Herein, hydrophobically modified poly(N-isopropylacrylamide) (pNIPAM) polymers were designed and synthesized by reversible addition-fragmentation chain transfer (RAFT) copolymerization of NIPAM and butyl acrylate (BA). A library of polymer systems was created by varying the BA : NIPAM ratio, molecular weight (Mw) and concentrations. While a coil-to-globule transition induced microphase separation occurred in the dilute solution, diverse phase behaviors were observed by phase diagram study. A transparent gel phase was identified in p(NIPAM-co-BA) systems, which was missing in its block counterpart pNIPAM-b-pBA, and existed over a wider temperature range with increased BA content, Mw and concentrations. A dynamic rheological analysis revealed that the gel properties were strongly dependent on temperature, which regulated the interchain hydrophobic association, and the gel proved to be highly elastic, stable, reversible and self-healable under the optimized conditions. The p(NIPAM-co-BA) system will be highly desirable for injectable in situ forming hydrogel materials, and the study demonstrated here can be potentially extended to other amphiphilic pNIPAM copolymers.
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Affiliation(s)
- Bin Li
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Mark E Thompson
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA and Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA.
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40
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Chakraborty I, Mukherjee K, De P, Bhattacharyya R. Monitoring Coil–Globule Transitions of Thermoresponsive Polymers by Using NMR Solvent Relaxation. J Phys Chem B 2018; 122:6094-6100. [DOI: 10.1021/acs.jpcb.8b02179] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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41
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Dong Q, Luo C, Li N, Chi J, Zhang Q. Temperature and Recognition Dual Responsive Poly(N-Isopropylacrylamide) and Poly(N,N-Dimethylacrylamide) with Adamantyl Side Group. MATERIALS 2018; 11:ma11040473. [PMID: 29565307 PMCID: PMC5951319 DOI: 10.3390/ma11040473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 03/21/2018] [Accepted: 03/21/2018] [Indexed: 11/23/2022]
Abstract
A series of copolymers with an adamantyl side group (poly(NIPAM-co-AdMA) and poly(DMAM-co-AdMA)) were prepared by radical copolymerization of N-isopropylacrylamide (NIPAM) and N,N-dimethylacrylamide (DMAM) with a 2-methyl-2-adamantylmethacrylate (AdMA) monomer. The structure and composition of the as-synthesized copolymers were characterized by Fourier transform infrared (FT-IR) spectroscopy, proton nuclear magnetic resonance (1H NMR) spectroscopy, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), and elemental analysis. Temperature and recognition dual responsivity of the copolymers was investigated by cloud point (Tcp) and dynamic light scattering (DLS), respectively. The results show that the as-synthesized copolymers are a kind of temperature-responsive polymer with a lower critical solution temperature (LCST). Tcp was approximately consistent with the critical temperature of intermolecular copolymer association (Tass) from DLS. For these copolymers, Tcp decreases with increasing content of AdMA unit in the copolymers. After the addition of β-cyclodextrins (β-CD), Tcp increases, and the increment of Tcp values gradually became large with increasing content of AdMA in the copolymers. It is host-guest molecular recognition of β-CD and adamantyl groups that endows the as-synthesized copolymers with recognition-tunable thermosensitivity.
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Affiliation(s)
- Qiujing Dong
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China.
- Anhui Provincial Key Laboratory for Degradation and Monitoring of the Pollution of the Environment, Fuyang 236037, China.
| | - Chunhua Luo
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China.
- Anhui Provincial Key Laboratory for Degradation and Monitoring of the Pollution of the Environment, Fuyang 236037, China.
| | - Na Li
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China.
| | - Jiaxiang Chi
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China.
| | - Qingqing Zhang
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China.
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42
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Huang B, Chen F, Shen Y, Qian K, Wang Y, Sun C, Zhao X, Cui B, Gao F, Zeng Z, Cui H. Advances in Targeted Pesticides with Environmentally Responsive Controlled Release by Nanotechnology. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E102. [PMID: 29439498 PMCID: PMC5853733 DOI: 10.3390/nano8020102] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 01/30/2018] [Accepted: 01/31/2018] [Indexed: 11/16/2022]
Abstract
Pesticides are the basis for defending against major biological disasters and important for ensuring national food security. Biocompatible, biodegradable, intelligent, and responsive materials are currently an emerging area of interest in the field of efficient, safe, and green pesticide formulation. Using nanotechnology to design and prepare targeted pesticides with environmentally responsive controlled release via compound and chemical modifications has also shown great potential in creating novel formulations. In this review, special attention has been paid to intelligent pesticides with precise controlled release modes that can respond to micro-ecological environment changes such as light-sensitivity, thermo-sensitivity, humidity sensitivity, soil pH, and enzyme activity. Moreover, establishing intelligent and controlled pesticide release technologies using nanomaterials are reported. These technologies could increase pesticide-loading, improve the dispersibility and stability of active ingredients, and promote target ability.
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Affiliation(s)
- Bingna Huang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
- College of Plant Protection, Southwest University, Chongqing 400715, China.
| | - Feifei Chen
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
- College of Plant Protection, Southwest University, Chongqing 400715, China.
| | - Yue Shen
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
| | - Kun Qian
- College of Plant Protection, Southwest University, Chongqing 400715, China.
| | - Yan Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
| | - Changjiao Sun
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
| | - Xiang Zhao
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
| | - Bo Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
| | - Fei Gao
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
| | - Zhanghua Zeng
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
| | - Haixin Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academic of Agriculture Sciences, Beijing 100081, China.
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43
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Biais P, Beaunier P, Stoffelbach F, Rieger J. Loop-stabilized BAB triblock copolymer morphologies by PISA in water. Polym Chem 2018. [DOI: 10.1039/c8py00914g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Assemblies of BAB triblock copolymers are prepared by PISA via aqueous RAFT dispersion polymerization. The importance of charges in the middle of the hydrophilic stabilizer loops is highlighted.
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Affiliation(s)
- Pauline Biais
- Sorbonne Université
- CNRS
- UMR 8232
- Institut Parisien de Chimie Moléculaire (IPCM)
- 75252 Paris Cedex 05
| | - Patricia Beaunier
- Sorbonne Université
- CNRS
- UMR 7197
- Laboratoire de Réactivité de Surface (LRS)
- 75252 Paris Cedex 05
| | - François Stoffelbach
- Sorbonne Université
- CNRS
- UMR 8232
- Institut Parisien de Chimie Moléculaire (IPCM)
- 75252 Paris Cedex 05
| | - Jutta Rieger
- Sorbonne Université
- CNRS
- UMR 8232
- Institut Parisien de Chimie Moléculaire (IPCM)
- 75252 Paris Cedex 05
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44
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Wang Y, Fantin M, Park S, Gottlieb E, Fu L, Matyjaszewski K. Electrochemically Mediated Reversible Addition-Fragmentation Chain-Transfer Polymerization. Macromolecules 2017; 50:7872-7879. [PMID: 29977098 PMCID: PMC6028042 DOI: 10.1021/acs.macromol.7b02005] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
An electrochemically mediated reversible addition-fragmentation chain-transfer polymerization (eRAFT) of (meth)acrylates was successfully carried out via electroreduction of either benzoyl peroxide (BPO) or 4-bromobenzenediazonium tetrafluoroborate (BrPhN2+) which formed aryl radicals, acting as initiators for RAFT polymerization. Direct electroreduction of chain transfer agents was unsuccessful since it resulted in the formation of carbanions by a two-electron transfer process. Reduction of BrPhN2+ under a fixed potential showed acceptable control, but limited conversion due to the generation of a passivating organic layer grafted on the working electrode surface. However, using fixed current conditions, easier to implement than fixed potential conditions, conversions > 80% were achieved. Well-defined homopolymers and block copolymers with a broad range of targeted degrees of polymerization were prepared.
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Affiliation(s)
- Yi Wang
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
| | - Marco Fantin
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
| | - Sangwoo Park
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
| | - Eric Gottlieb
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
| | - Liye Fu
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
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45
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Liu B, Wang J, Zhang Y, Wu S, Ru G, Feng J. Inhomogeneous-collapse driven micelle-vesicle transition of amphiphilic block copolymers. SOFT MATTER 2017; 13:7106-7111. [PMID: 28852756 DOI: 10.1039/c7sm01540b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Understanding the morphological transition dynamics related to the hydrophilic-hydrophobic interface has been a challenge due to the lack of an effective evaluation method. Herein, nuclear magnetic resonance spectroscopy was employed to study the morphological transition related chain collapse of poly(N,N'-diethylaminoethylmethacrylate)-b-poly(N-isopropylacrylamide) (PDEAEMA133-b-PNIPA322) and poly(N,N'-dimethylaminoethylmethacrylate)-b-poly(N-isopropylacrylamide) (PDMAEMA95-b-PNIPA228) and was proved to be a powerful technique in morphological transition mechanism studies once combined with dynamic light scattering and transmission electron microscopy. Unlike the cooperative coil collapse of two blocks in the PDMAEMA95-b-PNIPA228 alkaline solution upon heating which induces the assembly of a nanostructure (∼200 nm) with a hydrophobic core containing both collapsed PDMAEMA and PNIPA segments and a hydrophilic surface part consisting of un-shrunk PDMAEMA and PNIPA segments, PDEAEMA133-b-PNIPA322 with a low-temperature core-shell micelle structure showed a micelle-vesicle transition due to temperature-induced inhomogeneous-collapse of PNIPA. The PNIPA segments in the shell sequentially collapse outside (starting at the core-shell interface), accompanied by a gradual decrease in micelle size. Above the critical temperature, the residual hydrophilic PNIPA segments become too short to stabilize the micelle structure, the micelles then transform into vesicles of a slightly larger size, instead of micelle aggregation and precipitation as normally expected.
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Affiliation(s)
- Biaolan Liu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P. R. China.
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46
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Yeow J, Boyer C. Photoinitiated Polymerization-Induced Self-Assembly (Photo-PISA): New Insights and Opportunities. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2017; 4:1700137. [PMID: 28725534 PMCID: PMC5514979 DOI: 10.1002/advs.201700137] [Citation(s) in RCA: 264] [Impact Index Per Article: 37.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 04/20/2017] [Indexed: 05/17/2023]
Abstract
The polymerization-induced self-assembly (PISA) process is a useful synthetic tool for the efficient synthesis of polymeric nanoparticles of different morphologies. Recently, studies on visible light initiated PISA processes have offered a number of key research opportunities that are not readily accessible using traditional thermally initiated systems. For example, visible light mediated PISA (Photo-PISA) enables a high degree of control over the dispersion polymerization process by manipulation of the wavelength and intensity of incident light. In some cases, the final nanoparticle morphology of a single formulation can be modulated by simple manipulation of these externally controlled parameters. In addition, temporal (and in principle spatial) control over the Photo-PISA process can be achieved in most cases. Exploitation of the mild room temperature polymerizations conditions can enable the encapsulation of thermally sensitive therapeutics to occur without compromising the polymerization rate and their activities. Finally, the Photo-PISA process can enable further mechanistic insights into the morphological evolution of nanoparticle formation such as the effects of temperature on the self-assembly process. The purpose of this mini-review is therefore to examine some of these recent advances that have been made in Photo-PISA processes, particularly in light of the specific advantages that may exist in comparison with conventional thermally initiated systems.
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Affiliation(s)
- Jonathan Yeow
- School of Chemical EngineeringCentre for Advanced Macromolecular Design (CAMD) and Australian Centre for Nanomedicine (ACN)UNSW SydneySydneyNSW2052Australia
| | - Cyrille Boyer
- School of Chemical EngineeringCentre for Advanced Macromolecular Design (CAMD) and Australian Centre for Nanomedicine (ACN)UNSW SydneySydneyNSW2052Australia
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47
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Li H, Liu P, Yuan J, Si J, Liu Y, Li H, Gao Y. Thermo-Responsive Brush Copolymers by “Grafting Through” Strategy Implemented on the Surface of the Macromonomer Micelles and Their High Emulsifying Performance. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Heng Li
- College of Chemistry and Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, and; Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province; Xiangtan University; 411105 Hunan Province China
| | - Pin Liu
- College of Chemistry and Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, and; Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province; Xiangtan University; 411105 Hunan Province China
| | - Jun Yuan
- College of Chemistry and Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, and; Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province; Xiangtan University; 411105 Hunan Province China
| | - Jiaqing Si
- College of Chemistry and Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, and; Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province; Xiangtan University; 411105 Hunan Province China
| | - Yijiang Liu
- College of Chemistry and Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, and; Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province; Xiangtan University; 411105 Hunan Province China
| | - Huaming Li
- College of Chemistry and Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, and; Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province; Xiangtan University; 411105 Hunan Province China
| | - Yong Gao
- College of Chemistry and Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, and; Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province; Xiangtan University; 411105 Hunan Province China
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48
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Skandalis A, Pispas S. PDMAEMA-b-PLMA-b-POEGMA triblock terpolymers via RAFT polymerization and their self-assembly in aqueous solutions. Polym Chem 2017. [DOI: 10.1039/c7py00905d] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Novel PDMAEMA-b-PLMA-b-POEGMA triblock terpolymers were synthesized by RAFT polymerization. Triblock polyelectrolytes were obtained by quaternization. PDMAEMA-b-PLMA-b-POEGMA and QPDMAEMA-b-PLMA-b-POEGMA terpolymers self-assemble into spherical micelles with a mixed corona in aqueous media.
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Affiliation(s)
- Athanasios Skandalis
- Theoretical and Physical Chemistry Institute
- National Hellenic Research Foundation
- 11635 Athens
- Greece
| | - Stergios Pispas
- Theoretical and Physical Chemistry Institute
- National Hellenic Research Foundation
- 11635 Athens
- Greece
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49
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Responsive Polymer Nanostructures. POLYMER-ENGINEERED NANOSTRUCTURES FOR ADVANCED ENERGY APPLICATIONS 2017. [DOI: 10.1007/978-3-319-57003-7_6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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50
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Qu Y, Chang X, Chen S, Zhang W. In situ synthesis of thermoresponsive 4-arm star block copolymer nano-assemblies by dispersion RAFT polymerization. Polym Chem 2017. [DOI: 10.1039/c7py00508c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Thermoresponsive 4-arm star block copolymer nano-assemblies were synthesized, and their interesting thermoresponse was investigated.
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Affiliation(s)
- Yaqing Qu
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Xueying Chang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Shengli Chen
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Wangqing Zhang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
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