51
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György C, Verity C, Neal TJ, Rymaruk MJ, Cornel EJ, Smith T, Growney DJ, Armes SP. RAFT Dispersion Polymerization of Methyl Methacrylate in Mineral Oil: High Glass Transition Temperature of the Core-Forming Block Constrains the Evolution of Copolymer Morphology. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01528] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Csilla György
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
| | - Chloe Verity
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
| | - Thomas J. Neal
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
| | - Matthew J. Rymaruk
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
| | - Erik J. Cornel
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
| | - Timothy Smith
- Lubrizol Ltd., Nether Lane, Hazelwood, Derbyshire DE56 4AN, U.K
| | | | - Steven P. Armes
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
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52
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Raphael E, Derry MJ, Hippler M, Armes SP. Tuning the properties of hydrogen-bonded block copolymer worm gels prepared via polymerization-induced self-assembly. Chem Sci 2021; 12:12082-12091. [PMID: 34667573 PMCID: PMC8457373 DOI: 10.1039/d1sc03156b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 08/04/2021] [Indexed: 12/19/2022] Open
Abstract
Polymerization-induced self-assembly (PISA) is exploited to design hydrogen-bonded poly(stearyl methacrylate)-poly(benzyl methacrylate) [PSMA-PBzMA] worm gels in n-dodecane. Using a carboxylic acid-based RAFT agent facilitates hydrogen bonding between neighboring worms to produce much stronger physical gels than those prepared using the analogous methyl ester-based RAFT agent. Moreover, tuning the proportion of these two types of end-groups on the PSMA chains enables the storage modulus (G') of a 20% w/w worm gel to be tuned from ∼4.5 kPa up to ∼114 kPa. This is achieved via two complementary routes: (i) an in situ approach using binary mixtures of acid- and ester-capped PSMA stabilizer chains during PISA or (ii) a post-polymerization processing strategy using a thermally-induced worm-to-sphere transition to mix acid- and ester-functionalized spheres at 110 °C that fuse to form worms on cooling to 20 °C. SAXS and rheology studies of these hydrogen-bonded worm gels provide detailed insights into their inter-worm interactions and physical behavior, respectively. In the case of the carboxylic acid-functionalized worms, SAXS provides direct evidence for additional inter-worm interactions, while rheological studies confirm both a significant reduction in critical gelation concentration (from approximately 10% w/w to 2-3% w/w) and a substantial increase in critical gelation temperature (from 41 °C to 92 °C). It is remarkable that a rather subtle change in the chemical structure results in such improvements in gel strength, gelation efficiency and gel cohesion.
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Affiliation(s)
- Eleanor Raphael
- Chemistry Department, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
| | - Matthew J Derry
- Chemistry Department, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
| | - Michael Hippler
- Chemistry Department, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
| | - Steven P Armes
- Chemistry Department, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
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53
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Cao J, Tan Y, Chen Y, Zhang L, Tan J. Expanding the Scope of Polymerization-Induced Self-Assembly: Recent Advances and New Horizons. Macromol Rapid Commun 2021; 42:e2100498. [PMID: 34418199 DOI: 10.1002/marc.202100498] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/18/2021] [Indexed: 12/26/2022]
Abstract
Over the past decade or so, polymerization-induced self-assembly (PISA) has become a versatile method for rational preparation of concentrated block copolymer nanoparticles with a diverse set of morphologies. Much of the PISA literature has focused on the preparation of well-defined linear block copolymers by using linear macromolecular chain transfer agents (macro-CTAs) with high chain transfer constants. In this review, a recent process is highlighted from an unusual angle that has expanded the scope of PISA including i) synthesis of block copolymers with nonlinear architectures (e.g., star block copolymer, branched block copolymer) by PISA, ii) in situ synthesis of blends of polymers by PISA, and iii) utilization of macro-CTAs with low chain transfer constants in PISA. By highlighting these important examples, new insights into the research of PISA and future impact these methods will have on polymer and colloid synthesis are provided.
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Affiliation(s)
- Junpeng Cao
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yingxin Tan
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China
| | - Ying Chen
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou, 510006, China
| | - Li Zhang
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou, 510006, China
| | - Jianbo Tan
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou, 510006, China
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54
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The self-assembly and thermoresponsivity of poly(isoprene-b-methyl methacrylate) copolymers in non-polar solvents. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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55
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He J, Lin D, Chen Y, Zhang L, Tan J. One-Step Preparation of Thermo-Responsive Poly(N-isopropylacrylamide)-Based Block Copolymer Nanoparticles by Aqueous Photoinitiated Polymerization-Induced Self-Assembly. Macromol Rapid Commun 2021; 42:e2100201. [PMID: 34145660 DOI: 10.1002/marc.202100201] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/17/2021] [Indexed: 12/18/2022]
Abstract
Poly(N-isopropylacrylamide) (PNIPAM) is an important thermo-responsive polymer that finds applications in many areas. However, the preparation of PNIPAM-based block copolymer nanoparticles with higher-order morphologies at high solids is challenging. Herein, aqueous photoinitiated polymerization-induced self-assembly (photo-PISA) of N-isopropylacrylamide (NIPAM) using an asymmetrical cross-linker is developed for one-step preparation of PNIPAM-based block copolymer nanoparticles with various morphologies (spheres, worms, and vesicles). It is demonstrated that reaction temperature has a great effect on both polymerization kinetics and morphologies of block copolymer nanoparticles. Reversible addition-fragmentation chain transfer (RAFT) reactive groups embedded inside the PNIPAM core provide a landscape for further functionalization. PNIPAM-based block copolymer nanoparticles with different surface properties are prepared by seeded photo-PISA at room temperature. Finally, these block copolymer nanoparticles are also used as additives to tune mechanical properties of hydrogels via covalent cross-linking.
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Affiliation(s)
- Jun He
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China
| | - Dongni Lin
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China
| | - Ying Chen
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangdong University of Technology, Guangzhou, 510006, China
| | - Li Zhang
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangdong University of Technology, Guangzhou, 510006, China
| | - Jianbo Tan
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.,Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangdong University of Technology, Guangzhou, 510006, China
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56
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Beattie DL, Mykhaylyk OO, Ryan AJ, Armes SP. Rational synthesis of novel biocompatible thermoresponsive block copolymer worm gels. SOFT MATTER 2021; 17:5602-5612. [PMID: 33998622 DOI: 10.1039/d1sm00460c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
It is well known that reversible addition-fragmentation chain transfer (RAFT) aqueous dispersion polymerization of 2-hydroxypropyl methacrylate (HPMA) enables the rational design of diblock copolymer worm gels. Moreover, such hydrogels can undergo degelation on cooling below ambient temperature as a result of a worm-to-sphere transition. However, only a subset of such block copolymer worms exhibit thermoresponsive behavior. For example, PMPC26-PHPMA280 worm gels prepared using a poly(2-(methacryloyloxy)ethyl phosphorylcholine) (PMPC26) precursor do not undergo degelation on cooling to 6 °C (see S. Sugihara et al., J. Am. Chem. Soc., 2011, 133, 15707-15713). Informed by our recent studies (N. J. Warren et al., Macromolecules, 2018, 51, 8357-8371), we decided to reduce the mean degrees of polymerization of both the PMPC steric stabilizer block and the structure-directing PHPMA block when targeting a pure worm morphology. This rational approach reduces the hydrophobic character of the PHPMA block and hence introduces the desired thermoresponsive character, as evidenced by the worm-to-sphere transition (and concomitant degelation) that occurs on cooling a PMPC15-PHPMA150 worm gel from 40 °C to 6 °C. Moreover, worms are reconstituted on returning to 40 °C and the original gel modulus is restored. This augurs well for potential biomedical applications, which will be examined in due course. Finally, small-angle X-ray scattering studies indicated a scaling law exponent of 0.67 (≈2/3) for the relationship between the worm core cross-sectional diameter and the PHPMA DP for a series of PHPMA-based worms prepared using a range of steric stabilizer blocks, which is consistent with the strong segregation regime for such systems.
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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.
| | - Oleksandr O Mykhaylyk
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, UK.
| | - Anthony J Ryan
- 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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57
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Rymaruk MJ, O'Brien CT, György C, Darmau B, Jennings J, Mykhaylyk OO, Armes SP. Small-Angle X-Ray Scattering Studies of Block Copolymer Nano-Objects: Formation of Ordered Phases in Concentrated Solution During Polymerization-Induced Self-Assembly. Angew Chem Int Ed Engl 2021; 60:12955-12963. [PMID: 33725372 PMCID: PMC8252599 DOI: 10.1002/anie.202101851] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/12/2021] [Indexed: 01/13/2023]
Abstract
We report that polymerization-induced self-assembly (PISA) can be used to prepare lyotropic phases comprising diblock copolymer nano-objects in non-polar media. RAFT dispersion polymerization of benzyl methacrylate (BzMA) at 90 °C using a trithiocarbonate-capped hydrogenated polybutadiene (PhBD) steric stabilizer block in n-dodecane produces either spheres or worms that exhibit long-range order at 40 % w/w solids. NMR studies enable calculation of instantaneous copolymer compositions for each phase during the BzMA polymerization. As the PBzMA chains grow longer when targeting PhBD80 -PBzMA40 , time-resolved small-angle X-ray scattering reveals intermediate body-centered cubic (BCC) and hexagonally close-packed (HCP) sphere phases prior to formation of a final hexagonal cylinder phase (HEX). The HEX phase is lost on serial dilution and the aligned cylinders eventually form disordered flexible worms. The HEX phase undergoes an order-disorder transition on heating to 150 °C and a pure HCP phase forms on cooling to 20 °C.
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Affiliation(s)
- Matthew J. Rymaruk
- Dainton BuildingDepartment of ChemistryThe University of SheffieldSheffieldS3 7HFUK
- Present address: SyngentaJealott's HillBracknellBerkshireRG42 6EYUK
| | - Cate T. O'Brien
- Dainton BuildingDepartment of ChemistryThe University of SheffieldSheffieldS3 7HFUK
| | - Csilla György
- Dainton BuildingDepartment of ChemistryThe University of SheffieldSheffieldS3 7HFUK
| | - Bastien Darmau
- Dainton BuildingDepartment of ChemistryThe University of SheffieldSheffieldS3 7HFUK
| | - James Jennings
- Dainton BuildingDepartment of ChemistryThe University of SheffieldSheffieldS3 7HFUK
| | | | - Steven P. Armes
- Dainton BuildingDepartment of ChemistryThe University of SheffieldSheffieldS3 7HFUK
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58
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Rymaruk MJ, O'Brien CT, György C, Darmau B, Jennings J, Mykhaylyk OO, Armes SP. Small‐Angle X‐Ray Scattering Studies of Block Copolymer Nano‐Objects: Formation of Ordered Phases in Concentrated Solution During Polymerization‐Induced Self‐Assembly. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Matthew J. Rymaruk
- Dainton Building Department of Chemistry The University of Sheffield Sheffield S3 7HF UK
- Present address: Syngenta Jealott's Hill Bracknell Berkshire RG42 6EY UK
| | - Cate T. O'Brien
- Dainton Building Department of Chemistry The University of Sheffield Sheffield S3 7HF UK
| | - Csilla György
- Dainton Building Department of Chemistry The University of Sheffield Sheffield S3 7HF UK
| | - Bastien Darmau
- Dainton Building Department of Chemistry The University of Sheffield Sheffield S3 7HF UK
| | - James Jennings
- Dainton Building Department of Chemistry The University of Sheffield Sheffield S3 7HF UK
| | - Oleksandr O. Mykhaylyk
- Dainton Building Department of Chemistry The University of Sheffield Sheffield S3 7HF UK
| | - Steven P. Armes
- Dainton Building Department of Chemistry The University of Sheffield Sheffield S3 7HF UK
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59
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Li Y, Busatto N, Roth PJ. Perfluorophenyl Azides: Photo, Staudinger, and Multicomponent Postpolymerization Reactions on Homopolymers and PISA-Made Nanoparticles. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02833] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Yuman Li
- Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, U.K
| | - Nicolas Busatto
- Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, U.K
| | - Peter J. Roth
- Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, U.K
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60
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György C, Derry MJ, Cornel EJ, Armes SP. Synthesis of Highly Transparent Diblock Copolymer Vesicles via RAFT Dispersion Polymerization of 2,2,2-Trifluoroethyl Methacrylate in n-Alkanes. Macromolecules 2021; 54:1159-1169. [PMID: 33583957 PMCID: PMC7879428 DOI: 10.1021/acs.macromol.0c02646] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 01/06/2021] [Indexed: 01/28/2023]
Abstract
RAFT dispersion polymerization of 2,2,2-trifluoroethyl methacrylate (TFEMA) is performed in n-dodecane at 90 °C using a relatively short poly(stearyl methacrylate) (PSMA) precursor and 2-cyano-2-propyl dithiobenzoate (CPDB). The growing insoluble poly(2,2,2-trifluoroethyl methacrylate) (PTFEMA) block results in the formation of PSMA-PTFEMA diblock copolymer nano-objects via polymerization-induced self-assembly (PISA). GPC analysis indicated narrow molecular weight distributions (M w/M n ≤ 1.34) for all copolymers, with 19F NMR studies indicating high TFEMA conversions (≥95%) for all syntheses. A pseudo-phase diagram was constructed to enable reproducible targeting of pure spheres, worms, or vesicles by varying the target degree of polymerization of the PTFEMA block at 15-25% w/w solids. Nano-objects were characterized using dynamic light scattering, transmission electron microscopy, and small-angle X-ray scattering. Importantly, the near-identical refractive indices for PTFEMA (1.418) and n-dodecane (1.421) enable the first example of highly transparent vesicles to be prepared. The turbidity of such dispersions was examined between 20 and 90 °C. The highest transmittance (97% at 600 nm) was observed for PSMA9-PTFEMA294 vesicles (237 ± 24 nm diameter; prepared at 25% w/w solids) in n-dodecane at 20 °C. Interestingly, targeting the same diblock composition in n-hexadecane produced a vesicle dispersion with minimal turbidity at a synthesis temperature of 90 °C. This solvent enabled in situ visible absorption spectra to be recorded during the synthesis of PSMA16-PTFEMA86 spheres at 15% w/w solids, which allowed the relatively weak n→π* band at 515 nm assigned to the dithiobenzoate chain-ends to be monitored. Unfortunately, the premature loss of this RAFT chain-end occurred during the RAFT dispersion polymerization of TFEMA at 90 °C, so meaningful kinetic data could not be obtained. Furthermore, the dithiobenzoate chain-ends exhibited a λmax shift of 8 nm relative to that of the dithiobenzoate-capped PSMA9 precursor. This solvatochromatic effect suggests that the problem of thermally labile dithiobenzoate chain-ends cannot be addressed by performing the TFEMA polymerization at lower temperatures.
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Affiliation(s)
- Csilla György
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | | | | | - Steven P. Armes
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
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61
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Gibson RR, Fernyhough A, Musa OM, Armes SP. RAFT dispersion polymerization of N, N-dimethylacrylamide in a series of n-alkanes using a thermoresponsive poly( tert-octyl acrylamide) steric stabilizer. Polym Chem 2021. [DOI: 10.1039/d1py00045d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Poly(tert-octyl acrylamide)-poly(N,N-dimethylacrylamide) nanoparticles are prepared by RAFT dispersion polymerization at 70 °C in various n-alkanes. Thermoreversible flocculation occurs in higher n-alkanes on cooling to 20 °C.
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Affiliation(s)
- R. R. Gibson
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
| | | | | | - S. P. Armes
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
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62
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Dorsman IR, Derry MJ, Cunningham VJ, Brown SL, Williams CN, Armes SP. Tuning the vesicle-to-worm transition for thermoresponsive block copolymer vesicles prepared via polymerisation-induced self-assembly. Polym Chem 2021. [DOI: 10.1039/d0py01713b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Does statistical copolymerization of n-butyl methacrylate with benzyl methacrylate lower the critical temperature required for vesicle-to-worm and worm-to-sphere transitions for diblock copolymer nano-objects in mineral oil?
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Affiliation(s)
| | - Matthew J. Derry
- Department of Chemistry
- The University of Sheffield
- South Yorkshire
- UK
| | | | | | | | - Steven P. Armes
- Department of Chemistry
- The University of Sheffield
- South Yorkshire
- UK
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63
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Dao TPT, Vezenkov L, Subra G, Ladmiral V, Semsarilar M. Nano-assemblies with core-forming hydrophobic polypeptide via polymerization-induced self-assembly (PISA). Polym Chem 2021. [DOI: 10.1039/d0py00793e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The aim of this study is to produce self-assembled structures with hydrophobic polypeptide cores via Reversible Addition–Fragmentation chain Transfer (RAFT) – mediated Polymerisation-Induced Self-Assembly (PISA).
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Affiliation(s)
| | - Lubomir Vezenkov
- Institut des Biomolécules Max Mousseron
- IBMM
- Univ Montpellier
- CNRS
- ENSCM
| | - Gilles Subra
- Institut des Biomolécules Max Mousseron
- IBMM
- Univ Montpellier
- CNRS
- ENSCM
| | - Vincent Ladmiral
- Institut Charles Gerhardt Montpellier
- ICGM
- Univ Montpellier
- CNRS
- ENSCM
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64
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Wen SP, Yue Q, Fielding LA. RAFT miniemulsion polymerisation of benzyl methacrylate using non-ionic surfactant. Polym Chem 2021. [DOI: 10.1039/d1py00048a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
RAFT miniemulsion polymerisation of benzyl methacrylate using a non-ionic surfactant affords latexes with controllable molar mass, narrow molar mass distributions and tuneable particle diameter.
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Affiliation(s)
- Shang-Pin Wen
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
| | - Qi Yue
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
| | - Lee A. Fielding
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
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65
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Wen W, Ouyang W, Guan S, Chen A. Synthesis of azobenzene-containing liquid crystalline block copolymer nanoparticles via polymerization induced hierarchical self-assembly. Polym Chem 2021. [DOI: 10.1039/d0py01442g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A facile synthesis of non-spherical photoresponsive azobenzene-containing liquid crystalline nanoparticles via polymerization-induced hierarchical self-assembly (PIHSA).
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Affiliation(s)
- Wei Wen
- School of Materials Science and Engineering
- Beihang University
- Beijing 100191
- P. R. China
| | - Wangqi Ouyang
- School of Materials Science and Engineering
- Beihang University
- Beijing 100191
- P. R. China
| | - Song Guan
- School of Materials Science and Engineering
- Beihang University
- Beijing 100191
- P. R. China
| | - Aihua Chen
- School of Materials Science and Engineering
- Beihang University
- Beijing 100191
- P. R. China
- Beijing Advanced Innovation Centre for Biomedical Engineering
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66
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Hunter SJ, Armes SP. Pickering Emulsifiers Based on Block Copolymer Nanoparticles Prepared by Polymerization-Induced Self-Assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:15463-15484. [PMID: 33325720 PMCID: PMC7884006 DOI: 10.1021/acs.langmuir.0c02595] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 11/27/2020] [Indexed: 05/28/2023]
Abstract
Block copolymer nanoparticles prepared via polymerization-induced self-assembly (PISA) represent an emerging class of organic Pickering emulsifiers. Such nanoparticles are readily prepared by chain-extending a soluble homopolymer precursor using a carefully selected second monomer that forms an insoluble block in the chosen solvent. As the second block grows, it undergoes phase separation that drives in situ self-assembly to form sterically stabilized nanoparticles. Conducting such PISA syntheses in aqueous solution leads to hydrophilic nanoparticles that enable the formation of oil-in-water emulsions. Alternatively, hydrophobic nanoparticles can be prepared in non-polar media (e.g., n-alkanes), which enables water-in-oil emulsions to be produced. In this review, the specific advantages of using PISA to prepare such bespoke Pickering emulsifiers are highlighted, which include fine control over particle size, copolymer morphology, and surface wettability. This has enabled various fundamental scientific questions regarding Pickering emulsions to be addressed. Moreover, block copolymer nanoparticles can be used to prepare Pickering emulsions over various length scales, with mean droplet diameters ranging from millimeters to less than 200 nm.
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Affiliation(s)
- Saul J. Hunter
- Department of Chemistry,
Dainton Building, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
| | - Steven P. Armes
- Department of Chemistry,
Dainton Building, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
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67
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Hunter SJ, Cornel EJ, Mykhaylyk OO, Armes SP. Effect of Salt on the Formation and Stability of Water-in-Oil Pickering Nanoemulsions Stabilized by Diblock Copolymer Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:15523-15535. [PMID: 33332972 PMCID: PMC7884014 DOI: 10.1021/acs.langmuir.0c02742] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Sterically stabilized diblock copolymer nanoparticles are prepared in n-dodecane using polymerization-induced self-assembly. Precursor Pickering macroemulsions are then prepared by the addition of water followed by high-shear homogenization. In the absence of any salt, high-pressure microfluidization of such precursor emulsions leads to the formation of relatively large aqueous droplets with DLS measurements indicating a mean diameter of more than 600 nm. However, systemically increasing the salt concentration produces significantly finer droplets after microfluidization, until a limiting diameter of around 250 nm is obtained at 0.11 M NaCl. The mean size of these aqueous droplets can also be tuned by systematically varying the nanoparticle concentration, applied pressure, and the number of passes through the microfluidizer. The mean number of nanoparticles adsorbed onto each aqueous droplet and their packing efficiency are calculated. SAXS studies conducted on a Pickering nanoemulsion prepared using 0.11 M NaCl confirms that the aqueous droplets are coated with a loosely packed monolayer of nanoparticles. The effect of varying the NaCl concentration within the droplets on their initial rate of Ostwald ripening is investigated using DLS. Finally, the long-term stability of these water-in-oil Pickering nanoemulsions is assessed using analytical centrifugation. The rate of droplet ripening can be substantially reduced by using 0.11 M NaCl instead of pure water. However, increasing the salt concentration up to 0.43 M provided no further improvement in the long-term stability of such nanoemulsions.
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68
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Smith GN, Grillo I, Hallett JE. Molecular exchange in spherical diblock copolymer colloids synthesised by polymerisation-induced self-assembly. J Colloid Interface Sci 2020; 579:243-249. [PMID: 32592989 DOI: 10.1016/j.jcis.2020.06.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/04/2020] [Accepted: 06/05/2020] [Indexed: 10/24/2022]
Abstract
HYPOTHESIS To study molecular exchange between colloids requires the preparation of suitably labelled species. Deuterium isotopic labelling has been used to prepare two chemically identical yet isotopically distinguishable poly(lauryl methacrylate)-poly(methyl methacrylate) (PLMA-PMMA) diblock copolymer colloids by polymerisation-induced self-assembly (PISA) directly in an alkane solvent. Molecular exchange should be detectable by performing small-angle neutron scattering (SANS) measurements on the dispersions. EXPERIMENTS SANS measurements were performed on fully hydrogenous PLMA39-PMMA57 and deuterated core PLMA39-P(MMA-d8)57 colloids. They were mixed in equal amounts and heated to determine if molecular exchange occurred. PISA syntheses are often thermally initiated, and diblock copolymers self-assemble at elevated temperature, making this an important parameter to study. Experimental data for the mixture were compared to predicted curves for exchanged and non-exchanged colloids. FINDINGS The scattering of a mixture of fully hydrogenous and deuterated core copolymers does not disappear upon molecular exchange, due to the remaining contrast between the stabiliser and the core and solvent even after the cores fully exchange. By simultaneously fitting the SANS data from dispersions before mixing and using these parameters to constrain fitting the SANS data of mixtures, the molecular exchange between diblock copolymer micelles upon heating is clearly observed.
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Affiliation(s)
- Gregory N Smith
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom; Niels Bohr Institute, University of Copenhagen, H. C. Ørsted Institute, Universitetsparken 5, 2100 Copenhagen Ø, Denmark.
| | - Isabelle Grillo
- Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - James E Hallett
- H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom
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69
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Beattie DL, Mykhaylyk OO, Armes SP. Enthalpic incompatibility between two steric stabilizer blocks provides control over the vesicle size distribution during polymerization-induced self-assembly in aqueous media. Chem Sci 2020; 11:10821-10834. [PMID: 33209249 PMCID: PMC7654191 DOI: 10.1039/d0sc01320j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 06/19/2020] [Indexed: 01/05/2023] Open
Abstract
Over the past two decades, block copolymer vesicles have been widely used by many research groups to encapsulate small molecule drugs, genetic material, nanoparticles or enzymes. They have also been used to design examples of autonomous self-propelled nanoparticles. Traditionally, such vesicles are prepared via post-polymerization processing using a water-miscible co-solvent such as DMF or THF. However, such protocols are invariably conducted in dilute solution, which is a significant disadvantage. In addition, the vesicle size distribution is often quite broad, whereas aqueous dispersions of relatively small vesicles with narrow size distributions are highly desirable for potential biomedical applications. Alternatively, concentrated dispersions of block copolymer vesicles can be directly prepared via polymerization-induced self-assembly (PISA). Moreover, using a binary mixture of a relatively long and a relatively short steric stabilizer block enables the convenient PISA synthesis of relatively small vesicles with reasonably narrow size distributions in alcoholic media (C. Gonzato et al., JACS, 2014, 136, 11100-11106). Unfortunately, this approach has not yet been demonstrated for aqueous media, which would be much more attractive for commercial applications. Herein we show that this important technical objective can be achieved by judicious use of two chemically distinct, enthalpically incompatible steric stabilizer blocks, which ensures the desired microphase separation across the vesicle membrane. This leads to the formation of well-defined vesicles of around 200 nm diameter (size polydispersity = 13-16%) in aqueous media at 10% w/w solids as judged by transmission electron microscopy, dynamic light scattering and small-angle X-ray scattering.
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Affiliation(s)
- Deborah L Beattie
- Department of Chemistry , University of Sheffield , Dainton Building, Brook Hill , Sheffield , South Yorkshire, S3 7HF , UK . ;
| | - Oleksandr O Mykhaylyk
- Department of Chemistry , University of Sheffield , Dainton Building, Brook Hill , Sheffield , South Yorkshire, S3 7HF , UK . ;
| | - Steven P Armes
- Department of Chemistry , University of Sheffield , Dainton Building, Brook Hill , Sheffield , South Yorkshire, S3 7HF , UK . ;
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70
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Czajka A, Armes SP. In situ SAXS studies of a prototypical RAFT aqueous dispersion polymerization formulation: monitoring the evolution in copolymer morphology during polymerization-induced self-assembly. Chem Sci 2020; 11:11443-11454. [PMID: 34094387 PMCID: PMC8162469 DOI: 10.1039/d0sc03411h] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 09/11/2020] [Indexed: 12/28/2022] Open
Abstract
Small-angle X-ray scattering (SAXS) is used to characterize the in situ formation of diblock copolymer spheres, worms and vesicles during reversible addition-fragmentation chain transfer (RAFT) aqueous dispersion polymerization of 2-hydroxypropyl methacrylate at 70 °C using a poly(glycerol monomethacrylate) steric stabilizer. 1H NMR spectroscopy indicates more than 99% HPMA conversion within 80 min, while transmission electron microscopy and dynamic light scattering studies are consistent with the final morphology being pure vesicles. Analysis of time-resolved SAXS patterns for this prototypical polymerization-induced self-assembly (PISA) formulation enables the evolution in copolymer morphology, particle diameter, mean aggregation number, solvent volume fraction, surface density of copolymer chains and their mean inter-chain separation distance at the nanoparticle surface to be monitored. Furthermore, the change in vesicle diameter and membrane thickness during the final stages of polymerization supports an 'inward growth' mechanism.
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Affiliation(s)
- Adam Czajka
- Dainton Building Brook Hill Sheffield South Yorkshire S3 7HF UK
| | - Steven P Armes
- Dainton Building Brook Hill Sheffield South Yorkshire S3 7HF UK
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71
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Dao TPT, Vezenkov L, Subra G, Amblard M, In M, Le Meins JF, Aubrit F, Moradi MA, Ladmiral V, Semsarilar M. Self-Assembling Peptide—Polymer Nano-Objects via Polymerization-Induced Self-Assembly. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01260] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- T. P. Tuyen Dao
- Institut Européen des Membranes, IEM, University Montpellier, CNRS, ENSCM, Montpellier 34095, France
- Institut Charles Gerhardt Montpellier, ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier 34095, France
- Institut des Biomolécules Max Mousseron, IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Lubomir Vezenkov
- Institut des Biomolécules Max Mousseron, IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Gilles Subra
- Institut des Biomolécules Max Mousseron, IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Muriel Amblard
- Institut des Biomolécules Max Mousseron, IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Martin In
- Laboratoire Charles Coulomb, L2C, Univ Montpellier, CNRS, Montpellier 34095, France
| | - Jean-François Le Meins
- Laboratoire de Chimie des Polymères Organiques, LCPO UMR 5629, Université Bordeaux, CNRS, Pessac 33607, France
| | - Florian Aubrit
- Laboratoire de Chimie des Polymères Organiques, LCPO UMR 5629, Université Bordeaux, CNRS, Pessac 33607, France
| | - Mohammad-Amin Moradi
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven 5612 AZ, The Netherlands
| | - Vincent Ladmiral
- Institut Charles Gerhardt Montpellier, ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Mona Semsarilar
- Institut Européen des Membranes, IEM, University Montpellier, CNRS, ENSCM, Montpellier 34095, France
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72
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Guan S, Chen A. Influence of Spacer Lengths on the Morphology of Biphenyl-Containing Liquid Crystalline Block Copolymer Nanoparticles via Polymerization-Induced Self-Assembly. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00959] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Song Guan
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China
| | - Aihua Chen
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China
- Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University, Beijing 100191, P. R. China
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73
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Luo X, An Z. Polymerization‐Induced Self‐Assembly for the Synthesis of Poly(
N
,
N
‐dimethylacrylamide)‐
b
‐Poly(4‐
tert
‐butoxystyrene) Particles with Inverse Bicontinuous Phases. Macromol Rapid Commun 2020; 41:e2000209. [DOI: 10.1002/marc.202000209] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 05/17/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Xin Luo
- Institute of Nanochemistry and Nanobiology College of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China
| | - Zesheng An
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun Jilin 130012 China
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education School of Life Sciences Jilin University Changchun Jilin 130012 China
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74
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Cornel EJ, Smith GN, Rogers SE, Hallett JE, Growney DJ, Smith T, O'Hora PS, van Meurs S, Mykhaylyk OO, Armes SP. Time-resolved small-angle neutron scattering studies of the thermally-induced exchange of copolymer chains between spherical diblock copolymer nanoparticles prepared via polymerization-induced self-assembly. SOFT MATTER 2020; 16:3657-3668. [PMID: 32227048 DOI: 10.1039/c9sm02425e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Sterically-stabilized diblock copolymer nanoparticles (a.k.a. micelles) are prepared directly in non-polar media via polymerization-induced self-assembly (PISA). More specifically, a poly(lauryl methacrylate) chain transfer agent is chain-extended via reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of methyl methacrylate (MMA) to form sterically-stabilized spheres at 20% w/w solids in n-dodecane at 90 °C. Both fully hydrogenous (PLMA39-PMMA55 and PLMA39-PMMA94) and core-deuterated (PLMA39-d8PMMA57 and PLMA39-d8PMMA96) spherical nanoparticles with mean core diameters of approximately 20 nm were prepared using this protocol. After diluting each dispersion in turn to 1.0% w/w with n-dodecane, small-angle X-ray scattering studies confirmed essentially no change in spherical nanoparticle diameter after thermal annealing at 150 °C. Time-resolved small angle neutron scattering was used to examine whether copolymer chain exchange occurs between such nanoparticles at elevated temperatures. Copolymer chain exchange for a binary mixture of PLMA39-PMMA55 and PLMA39-d8PMMA57 nanoparticles produced hybrid (mixed) cores containing both PMMA55 and d8PMMA57 blocks within 3 min at 150 °C. In contrast, a binary mixture of PLMA39-PMMA94 and PLMA39-d8PMMA96 nanoparticles required 8 min at this temperature before no further reduction in neutron scattering intensity could be observed. These observations suggest that the rate of copolymer chain exchange depends on the degree of polymerization of the core-forming block. Relatively slow copolymer chain exchange was also observed at 80 °C, which is below the Tg of the core-forming PMMA block as determined by DSC studies. These observations confirm rapid exchange of individual copolymer chains between sterically-stabilized nanoparticles at elevated temperature. The implications of these findings are briefly discussed in the context of PISA, which is a powerful technique for the synthesis of sterically-stabilized nanoparticles.
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Affiliation(s)
- Erik J Cornel
- Department of Chemistry, University of Sheffield, Brook Hill, Dainton Building, Sheffield, South Yorkshire S3 7HF, UK.
| | - Gregory N Smith
- Department of Chemistry, University of Sheffield, Brook Hill, Dainton Building, Sheffield, South Yorkshire S3 7HF, UK. and Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Sarah E Rogers
- Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, UK
| | - James E Hallett
- H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UK
| | - David J Growney
- Lubrizol Ltd, Nether Lane, Hazelwood, Derbyshire DE56 4AN, UK
| | - Timothy Smith
- Lubrizol Ltd, Nether Lane, Hazelwood, Derbyshire DE56 4AN, UK
| | - Paul S O'Hora
- Lubrizol Ltd, Nether Lane, Hazelwood, Derbyshire DE56 4AN, UK
| | - Sandra van Meurs
- Department of Chemistry, University of Sheffield, Brook Hill, Dainton Building, Sheffield, South Yorkshire S3 7HF, UK.
| | - Oleksandr O Mykhaylyk
- Department of Chemistry, University of Sheffield, Brook Hill, Dainton Building, Sheffield, South Yorkshire S3 7HF, UK.
| | - Steven P Armes
- Department of Chemistry, University of Sheffield, Brook Hill, Dainton Building, Sheffield, South Yorkshire S3 7HF, UK.
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75
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Parker B, Derry MJ, Ning Y, Armes SP. Exploring the Upper Size Limit for Sterically Stabilized Diblock Copolymer Nanoparticles Prepared by Polymerization-Induced Self-Assembly in Non-Polar Media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3730-3736. [PMID: 32216260 PMCID: PMC7161081 DOI: 10.1021/acs.langmuir.0c00211] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/26/2020] [Indexed: 06/10/2023]
Abstract
Reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of benzyl methacrylate is used to prepare a series of well-defined poly(stearyl methacrylate)-poly(benzyl methacrylate) (PSMA-PBzMA) diblock copolymer nanoparticles in mineral oil at 90 °C. A relatively long PSMA54 precursor acts as a steric stabilizer block and also ensures that only kinetically trapped spheres are obtained, regardless of the target degree of polymerization (DP) for the core-forming PBzMA block. This polymerization-induced self-assembly (PISA) formulation provides good control over the particle size distribution over a wide size range (24-459 nm diameter). 1H NMR spectroscopy studies confirm that high monomer conversions (≥96%) are obtained for all PISA syntheses while transmission electron microscopy and dynamic light scattering analyses show well-defined spheres with a power-law relationship between the target PBzMA DP and the mean particle diameter. Gel permeation chromatography studies indicate a gradual loss of control over the molecular weight distribution as higher DPs are targeted, but well-defined morphologies and narrow particle size distributions can be obtained for PBzMA DPs up to 3500, which corresponds to an upper particle size limit of 459 nm. Thus, these are among the largest well-defined spheres with reasonably narrow size distributions (standard deviation ≤20%) produced by any PISA formulation. Such large spheres serve as model sterically stabilized particles for analytical centrifugation studies.
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Affiliation(s)
- Bryony
R. Parker
- Dainton Building, Department
of Chemistry, University of Sheffield, Brook
Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | | | - Yin Ning
- Dainton Building, Department
of Chemistry, University of Sheffield, Brook
Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Steven P. Armes
- Dainton Building, Department
of Chemistry, University of Sheffield, Brook
Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
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76
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Smith GN, Canning SL, Derry MJ, Jones ER, Neal TJ, Smith AJ. Ionic and Nonspherical Polymer Nanoparticles in Nonpolar Solvents. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00121] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Gregory N. Smith
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Sarah L. Canning
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Matthew J. Derry
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Elizabeth R. Jones
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Thomas J. Neal
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Andrew J. Smith
- Diamond Light Source Ltd., Diamond House, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
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77
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Cheng X, Miao T, Yin L, Ji Y, Li Y, Zhang Z, Zhang W, Zhu X. In Situ Controlled Construction of a Hierarchical Supramolecular Chiral Liquid‐Crystalline Polymer Assembly. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001657] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xiaoxiao Cheng
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsJiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou 215123 China
| | - Tengfei Miao
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsJiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou 215123 China
| | - Lu Yin
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsJiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou 215123 China
| | - Yujin Ji
- Institute of Functional Nano & Soft Materials (FUNSOM)Soochow University Suzhou 215123 China
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM)Soochow University Suzhou 215123 China
| | - Zhengbiao Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsJiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou 215123 China
| | - Wei Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsJiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou 215123 China
| | - Xiulin Zhu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsJiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou 215123 China
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78
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Cheng X, Miao T, Yin L, Ji Y, Li Y, Zhang Z, Zhang W, Zhu X. In Situ Controlled Construction of a Hierarchical Supramolecular Chiral Liquid-Crystalline Polymer Assembly. Angew Chem Int Ed Engl 2020; 59:9669-9677. [PMID: 32181944 DOI: 10.1002/anie.202001657] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 02/25/2020] [Indexed: 11/09/2022]
Abstract
Hierarchical supramolecular chiral liquid-crystalline (LC) polymer assemblies are challenging to construct in situ in a controlled manner. Now, polymerization-induced chiral self-assembly (PICSA) is reported. Hierarchical supramolecular chiral azobenzene-containing block copolymer (Azo-BCP) assemblies were constructed with π-π stacking interactions occurring in the layered structure of Azo smectic phases. The evolution of chirality from terminal alkyl chain to Azo mesogen building blocks and further induction of supramolecular chirality in LC BCP assemblies during PICSA is achieved. Morphologies such as spheres, worms, helical fibers, lamellae, and vesicles were observed. The morphological transition had a crucial effect on the chiral expression of Azo-BCP assemblies. The supramolecular chirality of Azo-BCP assemblies destroyed by 365 nm UV irradiation can be recovered by heating-cooling treatment; this dynamic reversible achiral-chiral switching can be repeated at least five times.
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Affiliation(s)
- Xiaoxiao Cheng
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Tengfei Miao
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Lu Yin
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Yujin Ji
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Zhengbiao Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Wei Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Xiulin Zhu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
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79
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Cornel EJ, O'Hora PS, Smith T, Growney DJ, Mykhaylyk OO, Armes SP. SAXS studies of the thermally-induced fusion of diblock copolymer spheres: formation of hybrid nanoparticles of intermediate size and shape. Chem Sci 2020; 11:4312-4321. [PMID: 34122889 PMCID: PMC8152590 DOI: 10.1039/d0sc00569j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 03/20/2020] [Indexed: 12/19/2022] Open
Abstract
Dilute dispersions of poly(lauryl methacrylate)-poly(benzyl methacrylate) (PLMA-PBzMA) diblock copolymer spheres (a.k.a. micelles) of differing mean particle diameter were mixed and thermally annealed at 150 °C to produce spherical nanoparticles of intermediate size. The two initial dispersions were prepared via reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of benzyl methacrylate in n-dodecane at 90 °C. Systematic variation of the mean degree of polymerization of the core-forming PBzMA block enabled control over the mean particle diameter: small-angle X-ray scattering (SAXS) analysis indicated that PLMA39-PBzMA97 and PLMA39-PBzMA294 formed well-defined, non-interacting spheres at 25 °C with core diameters of 21 ± 2 nm and 48 ± 5 nm, respectively. When heated separately, both types of nanoparticles regained their original dimensions during a 25-150-25 °C thermal cycle. However, the cores of the smaller nanoparticles became appreciably solvated when annealed at 150 °C, whereas the larger nanoparticles remained virtually non-solvated at this temperature. Moreover, heating caused a significant reduction in mean aggregation number for the PLMA39-PBzMA97 nanoparticles, suggesting their partial dissociation at 150 °C. Binary mixtures of PLMA39-PBzMA97 and PLMA39-PBzMA294 nanoparticles were then studied over a wide range of compositions. For example, annealing a 1.0% w/w equivolume binary mixture led to the formation of a single population of spheres of intermediate mean diameter (36 ± 4 nm). Thus we hypothesize that the individual PLMA39-PBzMA97 chains interact with the larger PLMA39-PBzMA294 nanoparticles to form the hybrid nanoparticles. Time-resolved SAXS studies confirm that the evolution in copolymer morphology occurs on relatively short time scales (within 20 min at 150 °C) and involves weakly anisotropic intermediate species. Moreover, weakly anisotropic nanoparticles can be obtained as a final copolymer morphology over a restricted range of compositions (e.g. for PLMA39-PBzMA97 volume fractions of 0.20-0.35) when heating dilute dispersions of such binary nanoparticle mixtures up to 150 °C. A mechanism involving both chain expulsion/insertion and micelle fusion/fission is proposed to account for these unexpected observations.
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Affiliation(s)
- E J Cornel
- Department of Chemistry, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
| | - P S O'Hora
- Lubrizol Ltd Nether Lane, Hazelwood Derbyshire DE56 4AN UK
| | - T Smith
- Lubrizol Ltd Nether Lane, Hazelwood Derbyshire DE56 4AN UK
| | - D J Growney
- Lubrizol Ltd Nether Lane, Hazelwood Derbyshire DE56 4AN UK
| | - O O Mykhaylyk
- Department of Chemistry, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
| | - S P Armes
- Department of Chemistry, University of Sheffield Dainton Building, Brook Hill Sheffield South Yorkshire S3 7HF UK
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80
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D'Agosto F, Rieger J, Lansalot M. RAFT‐vermittelte polymerisationsinduzierte Selbstorganisation (PISA). Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201911758] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Franck D'Agosto
- Univ Lyon Université Claude Bernard Lyon 1 CPE Lyon CNRS UMR 5265 Chemistry, Catalysis, Polymers and Processes (C2P2) 43 Bd du 11 Novembre 1918 69616 Villeurbanne Frankreich
| | - Jutta Rieger
- Sorbonne Université and CNRS UMR 8232 Institut Parisien de Chimie Moléculaire (IPCM), Polymer Chemistry Team (ECP) 4 Place Jussieu 75005 Paris Frankreich
| | - Muriel Lansalot
- Univ Lyon Université Claude Bernard Lyon 1 CPE Lyon CNRS UMR 5265 Chemistry, Catalysis, Polymers and Processes (C2P2) 43 Bd du 11 Novembre 1918 69616 Villeurbanne Frankreich
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81
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D'Agosto F, Rieger J, Lansalot M. RAFT‐Mediated Polymerization‐Induced Self‐Assembly. Angew Chem Int Ed Engl 2020; 59:8368-8392. [DOI: 10.1002/anie.201911758] [Citation(s) in RCA: 250] [Impact Index Per Article: 62.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Franck D'Agosto
- Univ Lyon Université Claude Bernard Lyon 1 CPE Lyon CNRS UMR 5265 Chemistry, Catalysis, Polymers and Processes (C2P2) 43 Bd du 11 Novembre 1918 69616 Villeurbanne France
| | - Jutta Rieger
- Sorbonne Université and CNRS UMR 8232 Institut Parisien de Chimie Moléculaire (IPCM) Polymer Chemistry Team (ECP) 4 Place Jussieu 75005 Paris France
| | - Muriel Lansalot
- Univ Lyon Université Claude Bernard Lyon 1 CPE Lyon CNRS UMR 5265 Chemistry, Catalysis, Polymers and Processes (C2P2) 43 Bd du 11 Novembre 1918 69616 Villeurbanne France
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82
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Rymaruk MJ, O’Brien CT, Brown SL, Williams CN, Armes SP. RAFT Dispersion Polymerization of Benzyl Methacrylate in Silicone Oil Using a Silicone-Based Methacrylic Stabilizer Provides Convenient Access to Spheres, Worms, and Vesicles. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02697] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Matthew J. Rymaruk
- Department of Chemistry, Dainton Building, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
| | - Cate T. O’Brien
- Department of Chemistry, Dainton Building, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
| | - Steven L. Brown
- Scott Bader Company Ltd., Wollaston, Wellingborough, Northamptonshire NN29 7RL, U.K
| | - Clive N. Williams
- Scott Bader Company Ltd., Wollaston, Wellingborough, Northamptonshire NN29 7RL, U.K
| | - Steven P. Armes
- Department of Chemistry, Dainton Building, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
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83
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Byard SJ, O'Brien CT, Derry MJ, Williams M, Mykhaylyk OO, Blanazs A, Armes SP. Unique aqueous self-assembly behavior of a thermoresponsive diblock copolymer. Chem Sci 2020; 11:396-402. [PMID: 32153754 PMCID: PMC7021201 DOI: 10.1039/c9sc04197d] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 11/11/2019] [Indexed: 01/29/2023] Open
Abstract
It is well-recognized that block copolymer self-assembly in solution typically produces spheres, worms or vesicles, with the relative volume fraction of each block dictating the copolymer morphology. Stimulus-responsive diblock copolymers that can undergo either sphere/worm or vesicle/worm transitions are also well-documented. Herein we report a new amphiphilic diblock copolymer that can form spheres, worms, vesicles or lamellae in aqueous solution. Such self-assembly behavior is unprecedented for a single diblock copolymer of fixed composition yet is achieved simply by raising the solution temperature from 1 °C (spheres) to 25 °C (worms) to 50 °C (vesicles) to 70 °C (lamellae). Heating increases the degree of hydration (and hence the effective volume fraction) of the core-forming block, with this parameter being solely responsible for driving the sphere-to-worm, worm-to-vesicle and vesicle-to-lamellae transitions. The first two transitions exhibit excellent reversibility but the vesicle-to-lamellae transition exhibits hysteresis on cooling. This new thermoresponsive diblock copolymer provides a useful model for studying such morphological transitions and is likely to be of significant interest for theoretical studies.
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Affiliation(s)
- Sarah J Byard
- Department of Chemistry , University of Sheffield , Dainton Building , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK .
| | - Cate T O'Brien
- Department of Chemistry , University of Sheffield , Dainton Building , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK .
| | - Matthew J Derry
- Department of Chemistry , University of Sheffield , Dainton Building , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK .
| | - Mark Williams
- Department of Chemistry , University of Sheffield , Dainton Building , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK .
| | - Oleksandr O Mykhaylyk
- Department of Chemistry , University of Sheffield , Dainton Building , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK .
| | - Adam Blanazs
- BASF SE , GMV/P-B001 , 67056 Ludwigshafen , Germany
| | - Steven P Armes
- Department of Chemistry , University of Sheffield , Dainton Building , Brook Hill , Sheffield , South Yorkshire S3 7HF , UK .
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84
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György C, Hunter SJ, Girou C, Derry MJ, Armes SP. Synthesis of poly(stearyl methacrylate)-poly(2-hydroxypropyl methacrylate) diblock copolymer nanoparticles via RAFT dispersion polymerization of 2-hydroxypropyl methacrylate in mineral oil. Polym Chem 2020. [DOI: 10.1039/d0py00562b] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
RAFT dispersion polymerization of 2-hydroxypropyl methacrylate produces diblock copolymer spheres, worms or vesicles in mineral oil; the Pickering emulsifier performance of the spheres is examined.
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Affiliation(s)
- Csilla György
- Dainton Building
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
| | - Saul J. Hunter
- Dainton Building
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
| | - Chloé Girou
- Dainton Building
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
| | - Matthew J. Derry
- Dainton Building
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
| | - Steven P. Armes
- Dainton Building
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
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85
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Audureau N, Coumes F, Guigner JM, Nguyen TPT, Ménager C, Stoffelbach F, Rieger J. Thermoresponsive properties of poly(acrylamide- co-acrylonitrile)-based diblock copolymers synthesized (by PISA) in water. Polym Chem 2020. [DOI: 10.1039/d0py00895h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
UCST-type poly(acrylamide-co-acrylonitrile) diblock copolymers synthesized in water (by PISA) can not only undergo reversible temperature-induced chain dissociation, but also temperature-induced morphological transition.
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Affiliation(s)
- Nicolas Audureau
- Sorbonne Université
- CNRS
- UMR 8232
- Institut Parisien de Chimie Moléculaire (IPCM)
- Polymer Chemistry Team
| | - Fanny Coumes
- Sorbonne Université
- CNRS
- UMR 8232
- Institut Parisien de Chimie Moléculaire (IPCM)
- Polymer Chemistry Team
| | - Jean-Michel Guigner
- Sorbonne Université
- CNRS
- UMR 7590 Institut de Minéralogie
- de Physique des Matériaux et de Cosmochimie (IMPMC)-IRD-MNHN
- F-75005 Paris
| | - Thi Phuong Thu Nguyen
- Sorbonne Université
- CNRS
- UMR 8232
- Institut Parisien de Chimie Moléculaire (IPCM)
- Polymer Chemistry Team
| | - Christine Ménager
- Sorbonne Université
- CNRS
- UMR 8234
- PHENIX Laboratory
- 75252 Paris cedex 05
| | - François Stoffelbach
- Sorbonne Université
- CNRS
- UMR 8232
- Institut Parisien de Chimie Moléculaire (IPCM)
- Polymer Chemistry Team
| | - Jutta Rieger
- Sorbonne Université
- CNRS
- UMR 8232
- Institut Parisien de Chimie Moléculaire (IPCM)
- Polymer Chemistry Team
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86
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Darmau B, Rymaruk MJ, Warren NJ, Bening R, Armes SP. RAFT dispersion polymerization of benzyl methacrylate in non-polar media using hydrogenated polybutadiene as a steric stabilizer block. Polym Chem 2020. [DOI: 10.1039/d0py01371d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Well-defined spheres, worms or vesicles are prepared via RAFT dispersion polymerization of benzyl methacrylate in n-dodecane at 90 °C using hydrogenated polybutadiene as a macro-RAFT agent.
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Affiliation(s)
- Bastien Darmau
- Dainton Building
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
| | - Matthew J. Rymaruk
- Dainton Building
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
| | - Nicholas J. Warren
- Dainton Building
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
| | - Robert Bening
- Kraton Polymers LLC
- a subsidiary of Kraton Corporation
- Houston
- USA
| | - Steven P. Armes
- Dainton Building
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
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87
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Gibson RR, Cornel EJ, Musa OM, Fernyhough A, Armes SP. RAFT dispersion polymerisation of lauryl methacrylate in ethanol–water binary mixtures: synthesis of diblock copolymer vesicles with deformable membranes. Polym Chem 2020. [DOI: 10.1039/c9py01768b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Diblock copolymer vesicles with deformable membranes are prepared via RAFT dispersion polymerisation of lauryl methacrylate in an 80 : 20 w/w ethanol–water mixture; visible light irradiation allows facile RAFT chain-end removal from these nano-objects.
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Affiliation(s)
- R. R. Gibson
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
| | - E. J. Cornel
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
| | | | | | - S. P. Armes
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
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88
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Docherty PJ, Girou C, Derry MJ, Armes SP. Epoxy-functional diblock copolymer spheres, worms and vesicles via polymerization-induced self-assembly in mineral oil. Polym Chem 2020. [DOI: 10.1039/d0py00380h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Epoxy-functional poly(stearyl methacrylate)-poly(glycidyl methacrylate) spheres, worms or vesicles can be prepared by RAFT dispersion polymerization of glycidyl methacrylate in mineral oil at 70 °C.
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Affiliation(s)
| | - Chloé Girou
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
| | | | - Steven P. Armes
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
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89
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Zhang WJ, Kadirkhanov J, Wang CH, Ding SG, Hong CY, Wang F, You YZ. Polymerization-induced self-assembly for the fabrication of polymeric nano-objects with enhanced structural stability by cross-linking. Polym Chem 2020. [DOI: 10.1039/d0py00368a] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review discusses the strategies of core-cross-linking in most of the PISA literatures (including post-polymerization cross-linking, photo-cross-linking and in situ cross-linking) and the applications of the cross-linked nano-objects.
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Affiliation(s)
- Wen-Jian Zhang
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- China
| | - Jamshid Kadirkhanov
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- China
| | - Chang-Hui Wang
- Department of Cardiology
- First Affiliated Hospital of Anhui Medical University
- Hefei 230026
- China
| | - Sheng-Gang Ding
- Department of Pediatrics
- First Affiliated Hospital of Anhui Medical University
- Hefei 230026
- China
| | - Chun-Yan Hong
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- China
| | - Fei Wang
- Neurosurgical Department
- The First Affiliated Hospital of USTC
- Division of Life Sciences and Medicine
- University of Science and Technology of China
- Hefei
| | - Ye-Zi You
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- China
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90
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Smith GN, Canning SL, Derry MJ, Mykhaylyk OO, Norman SE, Armes SP. Influence of an ionic comonomer on polymerization-induced self-assembly of diblock copolymers in non-polar media. Polym Chem 2020. [DOI: 10.1039/d0py00101e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Incorporating an appropriate ionic comonomer into a polymerization-induced self-assembly (PISA) formulation can provide convenient access to block copolymer worms and vesicles in non-polar media, in addition to spheres.
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Affiliation(s)
- Gregory N. Smith
- Department of Chemistry
- University of Sheffield
- UK
- Niels Bohr Institute
- University of Copenhagen
| | | | | | | | - Sarah E. Norman
- School of Chemistry and Chemical Engineering
- The QUILL Centre
- Queen's University Belfast
- Belfast BT9 5AG
- UK
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91
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Wen SP, Saunders JG, Fielding LA. Investigating the influence of solvent quality on RAFT-mediated PISA of sulfonate-functional diblock copolymer nanoparticles. Polym Chem 2020. [DOI: 10.1039/c9py01912j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Solvent quality has a marked impact on the assembly of sulfonate-functional diblock copolymer nanoparticles prepared by PISA.
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Affiliation(s)
- Shang-Pin Wen
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
| | - Jack G. Saunders
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
| | - Lee A. Fielding
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
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92
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Hatton FL, Derry MJ, Armes SP. Rational synthesis of epoxy-functional spheres, worms and vesicles by RAFT aqueous emulsion polymerisation of glycidyl methacrylate. Polym Chem 2020. [DOI: 10.1039/d0py01097a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The rational synthesis of epoxy-functional diblock copolymer nano-objects has been achieved by RAFT aqueous emulsion polymerisation of glycidyl methacrylate under mild conditions (50 °C, pH 7) to preserve the epoxy groups.
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Affiliation(s)
- Fiona L. Hatton
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
| | - Matthew J. Derry
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
| | - Steven P. Armes
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
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93
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Guan S, Wen W, Yang Z, Chen A. Liquid Crystalline Nanowires by Polymerization Induced Hierarchical Self-Assembly. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01757] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Song Guan
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China
| | - Wei Wen
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China
| | - Zhenzhong Yang
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Aihua Chen
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China
- Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University, Beijing 100191, P. R. China
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94
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Ratcliffe LPD, Derry MJ, Ianiro A, Tuinier R, Armes SP. A Single Thermoresponsive Diblock Copolymer Can Form Spheres, Worms or Vesicles in Aqueous Solution. Angew Chem Int Ed Engl 2019; 58:18964-18970. [PMID: 31596541 PMCID: PMC6973111 DOI: 10.1002/anie.201909124] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/30/2019] [Indexed: 12/17/2022]
Abstract
It is well-known that the self-assembly of AB diblock copolymers in solution can produce various morphologies depending on the relative volume fraction of each block. Recently, polymerization-induced self-assembly (PISA) has become widely recognized as a powerful platform technology for the rational design and efficient synthesis of a wide range of block copolymer nano-objects. In this study, PISA is used to prepare a new thermoresponsive poly(N-(2-hydroxypropyl) methacrylamide)-poly(2-hydroxypropyl methacrylate) [PHPMAC-PHPMA] diblock copolymer. Remarkably, TEM, rheology and SAXS studies indicate that a single copolymer composition can form well-defined spheres (4 °C), worms (22 °C) or vesicles (50 °C) in aqueous solution. Given that the two monomer repeat units have almost identical chemical structures, this system is particularly well-suited to theoretical analysis. Self-consistent mean field theory suggests this rich self-assembly behavior is the result of the greater degree of hydration of the PHPMA block at lower temperature, which is in agreement with variable temperature 1 H NMR studies.
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Affiliation(s)
- Liam P. D. Ratcliffe
- Department of Chemistry, Dainton BuildingUniversity of SheffieldBrook HillSouth YorkshireS3 7HFUK
- Present address: Unilever Research & DevelopmentColworth Laboratory, Colworth HouseSharnbrookBedfordMK44 1LQUK
| | - Matthew J. Derry
- Department of Chemistry, Dainton BuildingUniversity of SheffieldBrook HillSouth YorkshireS3 7HFUK
| | - Alessandro Ianiro
- Laboratory of Physical ChemistryDepartment of Chemical Engineering & Institute for Complex Molecular SystemsEindhoven University of TechnologyP.O. Box 513, 5600MBEindhovenThe Netherlands
| | - Remco Tuinier
- Laboratory of Physical ChemistryDepartment of Chemical Engineering & Institute for Complex Molecular SystemsEindhoven University of TechnologyP.O. Box 513, 5600MBEindhovenThe Netherlands
| | - Steven P. Armes
- Department of Chemistry, Dainton BuildingUniversity of SheffieldBrook HillSouth YorkshireS3 7HFUK
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95
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Ratcliffe LPD, Derry MJ, Ianiro A, Tuinier R, Armes SP. A Single Thermoresponsive Diblock Copolymer Can Form Spheres, Worms or Vesicles in Aqueous Solution. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909124] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Liam P. D. Ratcliffe
- Department of Chemistry, Dainton BuildingUniversity of Sheffield Brook Hill South Yorkshire S3 7HF UK
- Present address: Unilever Research & DevelopmentColworth Laboratory, Colworth House Sharnbrook Bedford MK44 1LQ UK
| | - Matthew J. Derry
- Department of Chemistry, Dainton BuildingUniversity of Sheffield Brook Hill South Yorkshire S3 7HF UK
| | - Alessandro Ianiro
- Laboratory of Physical ChemistryDepartment of Chemical Engineering & Institute for Complex Molecular SystemsEindhoven University of Technology P.O. Box 513, 5600 MB Eindhoven The Netherlands
| | - Remco Tuinier
- Laboratory of Physical ChemistryDepartment of Chemical Engineering & Institute for Complex Molecular SystemsEindhoven University of Technology P.O. Box 513, 5600 MB Eindhoven The Netherlands
| | - Steven P. Armes
- Department of Chemistry, Dainton BuildingUniversity of Sheffield Brook Hill South Yorkshire S3 7HF UK
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96
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Derry MJ, Smith T, O’Hora PS, Armes SP. Block Copolymer Nanoparticles Prepared via Polymerization-Induced Self-Assembly Provide Excellent Boundary Lubrication Performance for Next-Generation Ultralow-Viscosity Automotive Engine Oils. ACS APPLIED MATERIALS & INTERFACES 2019; 11:33364-33369. [PMID: 31430432 PMCID: PMC7007003 DOI: 10.1021/acsami.9b12472] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Core cross-linked poly(stearyl methacrylate)-poly(benzyl methacrylate)-poly(ethylene glycol dimethacrylate) [S31-B200-E20] triblock copolymer nanoparticles were synthesized directly in an industrial mineral oil via polymerization-induced self-assembly (PISA). Gel permeation chromatography analysis of the S31-B200 diblock copolymer precursor chains indicated a well-controlled reversible addition-fragmentation chain transfer dispersion polymerization, while transmission electron microscopy, dynamic light-scattering (DLS), and small-angle X-ray scattering studies indicated the formation of well-defined spheres. Moreover, DLS studies performed in THF, which is a common solvent for the S and B blocks, confirmed successful covalent stabilization because well-defined solvent-swollen spheres were obtained under such conditions. Tribology experiments using a mini-traction machine (MTM) indicated that 0.50% w/w dispersions of S31-B200-E20 spheres dramatically reduce the friction coefficient of base oil within the boundary lubrication regime. Given their efficient and straightforward PISA synthesis at high solids, such nanoparticles offer new opportunities for the formulation of next-generation ultralow-viscosity automotive engine oils.
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Affiliation(s)
- Matthew J. Derry
- Dainton
Building, Department of Chemistry, University
of Sheffield, Brook Hill, Sheffield, S3 7HF South Yorkshire, United Kingdom
- E-mail: . Phone: +44(0)114-222-9503
| | - Timothy Smith
- Lubrizol
Ltd., The Knowle, Nether
Lane, Hazelwood, Derbyshire DE56 4AN, United Kingdom
| | - Paul S. O’Hora
- Lubrizol
Ltd., The Knowle, Nether
Lane, Hazelwood, Derbyshire DE56 4AN, United Kingdom
| | - Steven P. Armes
- Dainton
Building, Department of Chemistry, University
of Sheffield, Brook Hill, Sheffield, S3 7HF South Yorkshire, United Kingdom
- E-mail: . Phone: +44(0)114-222-9342
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97
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Cao S, Shao J, Xia Y, Che H, Zhong Z, Meng F, van Hest JCM, Abdelmohsen LKEA, Williams DS. Molecular Programming of Biodegradable Nanoworms via Ionically Induced Morphology Switch toward Asymmetric Therapeutic Carriers. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901849. [PMID: 31379132 DOI: 10.1002/smll.201901849] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Engineering biodegradable nanostructures with precise morphological characteristics is a key objective in nanomedicine. In particular, asymmetric (i.e., nonspherical) nanoparticles are desirable due to the advantageous effects of shape in a biomedical context. Using molecular engineering, it is possible to program unique morphological features into the self-assembly of block copolymers (BCPs). However, the criteria of biocompatibility and scalability limit progress due to the prevalence of nondegradable components and the use of toxic solvents during fabrication. To address this shortfall, a robust strategy for the fabrication of morphologically asymmetric nanoworms, comprising biodegradable BCPs, has been developed. Modular BCPs comprising poly (ethylene glycol)-block-poly(caprolactone-gradient-trimethylene carbonate) (PEG-PCLgTMC), with a terminal chain of quaternary ammonium-TMC (PTMC-Q), undergo self-assembly via direct hydration into well-defined nanostructures. By controlling the solution ionic strength during hydration, particle morphology switches from spherical micelles to nanoworms (of varying aspect ratio). This ionically-induced switch is driven by modulation of chain packing with salts screening interchain repulsions, leading to micelle elongation. Nanoworms can be loaded with cytotoxic cargo (e.g., doxorubicin) at high efficiency, preferentially interact with cancer cells, and increase tumor penetration. This work showcases the ability to program assembly of BCPs and the potential of asymmetric nanosystems in anticancer drug delivery.
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Affiliation(s)
- Shoupeng Cao
- Bio-Organic Chemistry, Institute for Complex Molecular Systems, Institution, Eindhoven University of Technology, P.O. Box 513 (STO 3.41), 5600 MB, Eindhoven, the Netherlands
| | - Jingxin Shao
- Bio-Organic Chemistry, Institute for Complex Molecular Systems, Institution, Eindhoven University of Technology, P.O. Box 513 (STO 3.41), 5600 MB, Eindhoven, the Netherlands
| | - Yifeng Xia
- Biomedical Polymers Laboratory, and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Hailong Che
- Bio-Organic Chemistry, Institute for Complex Molecular Systems, Institution, Eindhoven University of Technology, P.O. Box 513 (STO 3.41), 5600 MB, Eindhoven, the Netherlands
| | - Zhiyuan Zhong
- Biomedical Polymers Laboratory, and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Fenghua Meng
- Biomedical Polymers Laboratory, and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Jan C M van Hest
- Bio-Organic Chemistry, Institute for Complex Molecular Systems, Institution, Eindhoven University of Technology, P.O. Box 513 (STO 3.41), 5600 MB, Eindhoven, the Netherlands
| | - Loai K E A Abdelmohsen
- Bio-Organic Chemistry, Institute for Complex Molecular Systems, Institution, Eindhoven University of Technology, P.O. Box 513 (STO 3.41), 5600 MB, Eindhoven, the Netherlands
| | - David S Williams
- Department of Chemistry, College of Science, Swansea University, Swansea, SA2 8PP, UK
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98
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He X, Li X, Dong J. Self-assembly of well-defined amphiphilic poly(N-(2-methacryloylxyethyl)pyrrolidone)- poly(lauryl methacrylate) diblock copolymers in non-polar solvent. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.05.095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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99
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Rymaruk MJ, O’Brien CT, Brown SL, Williams CN, Armes SP. Effect of Core Cross-linking on the Physical Properties of Poly(dimethylsiloxane)-Based Diblock Copolymer Worms Prepared in Silicone Oil. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01488] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Matthew J. Rymaruk
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
| | - Cate T. O’Brien
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
| | - Steven L. Brown
- Scott Bader Company Ltd., Wollaston, Wellingborough, Northamptonshire NN29 7RL, U.K
| | - Clive N. Williams
- Scott Bader Company Ltd., Wollaston, Wellingborough, Northamptonshire NN29 7RL, U.K
| | - Steven P. Armes
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K
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Boujioui F, Zhuge F, Gohy J. Redox Polymer–Based Nano‐Objects via Polymerization‐Induced Self‐Assembly. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900296] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fadoi Boujioui
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain Place L. Pasteur 1 1348 Louvain‐la‐Neuve Belgium
| | - Flanco Zhuge
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain Place L. Pasteur 1 1348 Louvain‐la‐Neuve Belgium
| | - Jean‐François Gohy
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain Place L. Pasteur 1 1348 Louvain‐la‐Neuve Belgium
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