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Sixdenier L, Augé A, Zhao Y, Marie E, Tribet C. UCST-Type Polymer Capsules Formed by Interfacial Complexation. ACS Macro Lett 2022; 11:651-656. [PMID: 35570812 DOI: 10.1021/acsmacrolett.2c00021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Formation of aqueous-core polymer capsules exhibiting an upper critical solution temperature (UCST) was achieved using surfactant-polymer interfacial complexation in water-in-oil inverse emulsions. In fluorinated oil, Coulombic interactions between Krytox, an anionic oil-soluble surfactant, and a cationic poly(lysine) grafted with poly(acrylamide-co-acrylonitrile) enabled the formation of an adsorbed polymer shell at the surface of water droplets. The thermoresponsiveness of the polymer shell was assessed by fluorescence microscopy with and without the presence of nanoparticles, including gold particles. We show that, above the cloud point, polymers with a balanced fraction of UCST grafts form flat adlayers that (i) spontaneously entrap nanoparticles upon cooling and (ii) switch from fluid-like dynamics at high temperature to solid-like dynamics below the cloud point. This system offers a straightforward mean to prepare temperature-sensitive capsules in mild, biocompatible conditions and to concentrate nanoparticles (including nanoheaters) in their shell.
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Affiliation(s)
- Lucas Sixdenier
- P.A.S.T.E.U.R., Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Amélie Augé
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Yue Zhao
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Emmanuelle Marie
- P.A.S.T.E.U.R., Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Christophe Tribet
- P.A.S.T.E.U.R., Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
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Audureau N, Coumes F, Rieger J, Stoffelbach F. Poly(N-cyanoethylacrylamide), a new thermoresponsive homopolymer presenting both LCST and UCST behavior in water. Polym Chem 2022. [DOI: 10.1039/d2py00032f] [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
We have recently demonstrated that poly(N-cyanomethylacrylamide) (PCMAm) synthesized by reversible addition-fragmentation chain transfer (RAFT) radical polymerization exhibits a typical upper critical solution temperature (UCST)-type transition in water with a very...
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Micellar phase control of poly(acrylic-acid-co-acrylonitrile) polymeric micelles via upper critical solution temperature: Removal process of organic molecules. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2021.139224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Audureau N, Coumes F, Veith C, Guibert C, Guigner JM, Stoffelbach F, Rieger J. Synthesis and Characterization of Temperature-Responsive N-Cyanomethylacrylamide-Containing Diblock Copolymer Assemblies in Water. Polymers (Basel) 2021; 13:4424. [PMID: 34960975 PMCID: PMC8707179 DOI: 10.3390/polym13244424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/09/2021] [Accepted: 12/13/2021] [Indexed: 01/31/2023] Open
Abstract
We have previously demonstrated that poly(N-cyanomethylacrylamide) (PCMAm) exhibits a typical upper-critical solution temperature (UCST)-type transition, as long as the molar mass of the polymer is limited, which was made possible through the use of reversible addition-fragmentation chain transfer (RAFT) radical polymerization. In this research article, we use for the first time N-cyanomethylacrylamide (CMAm) in a typical aqueous dispersion polymerization conducted in the presence of poly(N,N-dimethylacrylamide) (PDMAm) macroRAFT agents. After assessing that well-defined PDMAm-b-PCMAm diblock copolymers were formed through this aqueous synthesis pathway, we characterized in depth the colloidal stability, morphology and temperature-responsiveness of the dispersions, notably using cryo-transmission electron microscopy (cryo-TEM), dynamic light scattering (DLS), small angle X-ray scattering (SAXS) and turbidimetry. The combined analyses revealed that stable nanometric spheres, worms and vesicles could be prepared when the PDMAm block was sufficiently long. Concerning the thermoresponsiveness, only diblocks with a PCMAm block of a low degree of polymerization (DPn,PCMAm < 100) exhibited a UCST-type dissolution upon heating at low concentration. In contrast, for higher DPn,PCMAm, the diblock copolymer nano-objects did not disassemble. At sufficiently high temperatures, they rather exhibited a temperature-induced secondary aggregation of primary particles. In summary, we demonstrated that various morphologies of nano-objects could be obtained via a typical polymerization-induced self-assembly (PISA) process using PCMAm as the hydrophobic block. We believe that the development of this aqueous synthesis pathway of novel PCMAm-based thermoresponsive polymers will pave the way towards various applications, notably as thermoresponsive coatings and in the biomedical field.
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Affiliation(s)
- Nicolas Audureau
- Polymer Chemistry Team, Institut Parisien de Chimie Moléculaire (IPCM), Sorbonne Université & CNRS, UMR 8232, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (N.A.); (F.C.); (C.V.)
| | - Fanny Coumes
- Polymer Chemistry Team, Institut Parisien de Chimie Moléculaire (IPCM), Sorbonne Université & CNRS, UMR 8232, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (N.A.); (F.C.); (C.V.)
| | - Clémence Veith
- Polymer Chemistry Team, Institut Parisien de Chimie Moléculaire (IPCM), Sorbonne Université & CNRS, UMR 8232, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (N.A.); (F.C.); (C.V.)
| | - Clément Guibert
- Laboratoire de Réactivité de Surface (LRS), Sorbonne Université, CNRS, 4 Place Jussieu, CEDEX 05, 75252 Paris, France;
| | - Jean-Michel Guigner
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC)-IRD-MNHN, Sorbonne Université & CNRS, UMR 7590, CEDEX 05, 75252 Paris, France;
| | - François Stoffelbach
- Polymer Chemistry Team, Institut Parisien de Chimie Moléculaire (IPCM), Sorbonne Université & CNRS, UMR 8232, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (N.A.); (F.C.); (C.V.)
| | - Jutta Rieger
- Polymer Chemistry Team, Institut Parisien de Chimie Moléculaire (IPCM), Sorbonne Université & CNRS, UMR 8232, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (N.A.); (F.C.); (C.V.)
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Playing construction with the monomer toy box for the synthesis of multi‐stimuli responsive copolymers by reversible deactivation radical polymerization protocols. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210590] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Nanogels Capable of Triggered Release. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2021; 178:99-146. [PMID: 33665715 DOI: 10.1007/10_2021_163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
This chapter provides an overview of soft and environmentally sensitive polymeric nanosystems, which are widely known as nanogels. These particles keep great promise to the area of drug delivery due to their high biocompatibility with body fluids and tissues, as well as due to their ability to encapsulate and release the loaded drugs in a controlled manner. For a long period of time, the controlled drug delivery systems were designed to provide long-termed or sustained release. However, some medical treatments such as cancer chemotherapy, protein and gene delivery do not require the prolonged release of the drug in the site of action. In contrast, the rapid increase of the drug concentration is needed for gaining the desired biological effect. Being very sensitive to surrounding media and different stimuli, nanogels can undergo physico-chemical transitions or chemical changes in their structure. Such changes can result in more rapid release of the drugs, which is usually referred to as triggered drug release. Herein we give the basic information on nanogel unique features, methods of sensitive nanogels preparation, as well as on main mechanisms of triggered release. Additionally, the triggered release of low-molecular drugs and biomacromolecules are discussed.
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Nie S, Lu J, Huang Y, Li QA. Zonisamide-loaded triblock copolymer nanomicelle as a controlled drug release platform for the treatment of oxidative stress -induced spinal cord neuronal damage. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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