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Greenall MJ, Derry MJ. Temperature dependence of micelle shape transitions in copolymer solutions: the role of inter-block incompatibility. SOFT MATTER 2024; 20:3628-3634. [PMID: 38619553 DOI: 10.1039/d4sm00331d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
The nature of the transition between worm-like and spherical micelles in block copolymer dispersions varies between systems. In some formulations, heating drives a transition from worms to spheres, while in other systems the same transition is induced by cooling. In addition, a sphere-worm interconversion can be accompanied either by an increase or a decrease in the core solvation, even if the direction of the temperature dependence is the same. Here, self-consistent field theory is used to provide a potential explanation of this range of behaviour. Specifically, we show that, within this model, the dependence of the transition on the incompatibility χBS of the solvophobic block B and the solvent S (the parameter most closely related to the temperature) is strongly influenced by the incompatibility χAB between B and the solvophilic block A. When χAB is small (χAB < 0.1), it is found that increasing χBS produces a transition from worm-like micelles to spheres (or, more generally, from less curved to more curved structures). When χAB is above 0.1, increasing χBS drives the system from spheres to worm-like micelles. Whether a transition is observed within a realistic range of χBS is also found to depend on the fraction of solvophilic material in the copolymer. The relevance of our calculations to experiments is discussed, and we suggest that the direction of the temperature dependence may be controlled not only by the solution behaviour of the solvophobic block (upper critical solution temperature-like versus lower critical solution temperature-like) but also by χAB.
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Affiliation(s)
- M J Greenall
- School of Mathematics and Physics, University of Lincoln, Brayford Pool, Lincoln, LN6 7TS, UK.
| | - M J Derry
- Aston Institute for Membrane Excellence, Aston University, Birmingham, B4 7ET, UK
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2
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Liu D, Yang S, Peng S, Chen Y, Zhang L, Tan J. Simultaneous Synthesis and Self-Assembly of Bottlebrush Block Copolymers at Room Temperature via Photoinitiated RAFT Dispersion Polymerization. Macromol Rapid Commun 2022; 43:e2100921. [PMID: 35212438 DOI: 10.1002/marc.202100921] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/04/2022] [Indexed: 11/10/2022]
Abstract
Bottlebrush polymers exhibiting unique properties have attracted considerable attention for applications in many research areas. Herein, we report the first simultaneous synthesis and self-assembly of bottlebrush block copolymers at room temperature via photoinitiated polymerization-induced self-assembly (photo-PISA) using multifunctional macromolecular chain transfer agents (macro-CTAs). Compare with linear block copolymers, the bottlebrush block copolymers could promote the formation of higher-order morphologies (e.g. vesicles) when targeting similar degrees of polymerization (DPs). Moreover, a higher polymerization rate was observed in the case of bottlebrush block copolymers. Gel permeation chromatography (GPC) analysis showed that good polymerization control was maintained when synthesizing bottlebrush block copolymers by photo-PISA. Finally, the obtained bottlebrush block copolymer vesicles were used as seeds for further chain extension and multicomponent nanoparticles with a sponge internal structure were formed. We expect this study will not only expand polymer architectures employed in PISA, but also provides a new strategy to synthesize polymer nanoparticles with unique structures. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Dongdong Liu
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Shuaiqi Yang
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Shaojie Peng
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Ying Chen
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou, 510006, P. R. China
| | - Li Zhang
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, P. R. China.,Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou, 510006, P. R. China
| | - Jianbo Tan
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, P. R. China.,Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou, 510006, P. R. China
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3
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Beattie DL, Deane OJ, Mykhaylyk OO, Armes SP. RAFT aqueous dispersion polymerization of 4-hydroxybutyl acrylate: effect of end-group ionization on the formation and colloidal stability of sterically-stabilized diblock copolymer nanoparticles. Polym Chem 2022. [DOI: 10.1039/d1py01562a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Poly(2-hydroxyethyl acrylate)-poly(4-hydroxybutyl acrylate) nano-objects are prepared by aqueous polymerization-induced self-assembly (PISA) using an ionic RAFT agent.
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Affiliation(s)
- Deborah L. Beattie
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF, UK
| | - Oliver J. Deane
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF, UK
| | - Oleksandr O. Mykhaylyk
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF, UK
| | - Steven P. Armes
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF, UK
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Sobotta FH, Kuchenbrod MT, Gruschwitz FV, Festag G, Bellstedt P, Hoeppener S, Brendel JC. Tuneable Time Delay in the Burst Release from Oxidation-Sensitive Polymersomes Made by PISA. Angew Chem Int Ed Engl 2021; 60:24716-24723. [PMID: 34542227 PMCID: PMC8596869 DOI: 10.1002/anie.202108928] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 09/07/2021] [Indexed: 01/12/2023]
Abstract
Reactive polymersomes represent a versatile artificial cargo carrier system that can facilitate an immediate release in response to a specific stimulus. The herein presented oxidation-sensitive polymersomes feature a time-delayed release mechanism in an oxidative environment, which can be precisely adjusted by either tuning the membrane thickness or partial pre-oxidation. These polymeric vesicles are conveniently prepared by PISA allowing the straightforward and effective in situ encapsulation of cargo molecules, as shown for dyes and enzymes. Kinetic studies revealed a critical degree of oxidation causing the destabilization of the membrane, while no release of the cargo is observed beforehand. The encapsulation of glucose oxidase directly transforms these polymersomes into glucose-sensitive vesicles, as small molecules including sugars can passively penetrate their membrane. Considering the ease of preparation, these polymersomes represent a versatile platform for the confinement and burst release of cargo molecules after a precisely adjustable time span in the presence of specific triggers, such as H2 O2 or glucose.
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Affiliation(s)
- Fabian H. Sobotta
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstrasse 1007743JenaGermany), E-mail: J. C. Brendel
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 707743JenaGermany
| | - Maren T. Kuchenbrod
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstrasse 1007743JenaGermany), E-mail: J. C. Brendel
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 707743JenaGermany
| | - Franka V. Gruschwitz
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstrasse 1007743JenaGermany), E-mail: J. C. Brendel
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 707743JenaGermany
| | - Grit Festag
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstrasse 1007743JenaGermany), E-mail: J. C. Brendel
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 707743JenaGermany
| | - Peter Bellstedt
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstrasse 1007743JenaGermany), E-mail: J. C. Brendel
| | - Stephanie Hoeppener
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstrasse 1007743JenaGermany), E-mail: J. C. Brendel
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 707743JenaGermany
| | - Johannes C. Brendel
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstrasse 1007743JenaGermany), E-mail: J. C. Brendel
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 707743JenaGermany
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5
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Sobotta FH, Kuchenbrod MT, Gruschwitz FV, Festag G, Bellstedt P, Hoeppener S, Brendel JC. Kontrollierbare Zeitverzögerung beim Aufplatzen von oxidationsempfindlichen, mittels PISA synthetisierten Polymersomen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fabian H. Sobotta
- Institut für Organische und Makromolekulare Chemie (IOMC) Friedrich-Schiller Universität Jena Humboldtstraße 10 07743 Jena Deutschland
- Jena Center for Soft Matter (JCSM) Friedrich Schiller Universität Jena Philosophenweg 7 07743 Jena Deutschland
| | - Maren T. Kuchenbrod
- Institut für Organische und Makromolekulare Chemie (IOMC) Friedrich-Schiller Universität Jena Humboldtstraße 10 07743 Jena Deutschland
- Jena Center for Soft Matter (JCSM) Friedrich Schiller Universität Jena Philosophenweg 7 07743 Jena Deutschland
| | - Franka V. Gruschwitz
- Institut für Organische und Makromolekulare Chemie (IOMC) Friedrich-Schiller Universität Jena Humboldtstraße 10 07743 Jena Deutschland
- Jena Center for Soft Matter (JCSM) Friedrich Schiller Universität Jena Philosophenweg 7 07743 Jena Deutschland
| | - Grit Festag
- Institut für Organische und Makromolekulare Chemie (IOMC) Friedrich-Schiller Universität Jena Humboldtstraße 10 07743 Jena Deutschland
- Jena Center for Soft Matter (JCSM) Friedrich Schiller Universität Jena Philosophenweg 7 07743 Jena Deutschland
| | - Peter Bellstedt
- Institut für Organische und Makromolekulare Chemie (IOMC) Friedrich-Schiller Universität Jena Humboldtstraße 10 07743 Jena Deutschland
| | - Stephanie Hoeppener
- Institut für Organische und Makromolekulare Chemie (IOMC) Friedrich-Schiller Universität Jena Humboldtstraße 10 07743 Jena Deutschland
- Jena Center for Soft Matter (JCSM) Friedrich Schiller Universität Jena Philosophenweg 7 07743 Jena Deutschland
| | - Johannes C. Brendel
- Institut für Organische und Makromolekulare Chemie (IOMC) Friedrich-Schiller Universität Jena Humboldtstraße 10 07743 Jena Deutschland
- Jena Center for Soft Matter (JCSM) Friedrich Schiller Universität Jena Philosophenweg 7 07743 Jena Deutschland
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6
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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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7
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Hausig F, Sobotta FH, Richter F, Harz DO, Traeger A, Brendel JC. Correlation between Protonation of Tailor-Made Polypiperazines and Endosomal Escape for Cytosolic Protein Delivery. ACS APPLIED MATERIALS & INTERFACES 2021; 13:35233-35247. [PMID: 34283557 DOI: 10.1021/acsami.1c00829] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Responsive polymers, which become protonated at decreasing pH, are considered a milestone in the development of synthetic cell entry vectors. Exact correlations between their properties and their ability to escape the endosome, however, often remain elusive due to hydrophobic interactions or limitations in the design of water-soluble materials with suitable basicity. Here, we present a series of well-defined, hydrophilic polypiperazines, where systematic variation of the amino moiety facilitates an unprecedented fine-tuning of the basicity or pKa value within the physiologically relevant range (pH 6-7.4). Coincubation of HEK 293T cells with various probes, including small fluorophores or functioning proteins, revealed a rapid increase of endosomal release for polymers with pKa values above 6.5 or 7 in serum-free or serum-containing media, respectively. Similarly, cytotoxic effects became severe at increased pKa values (>7). Although the window for effective transport appears narrow, the discovered correlations offer a principal guideline for the design of effective polymers for endosomal escape.
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Affiliation(s)
- Franziska Hausig
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
| | - Fabian H Sobotta
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
| | - Friederike Richter
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
| | - Dominic O Harz
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
| | - Anja Traeger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Johannes C Brendel
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
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