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Antignano I, D’Acunzo F, Arena D, Casciardi S, Del Giudice A, Gentile F, Pelosi M, Masci G, Gentili P. Influence of Nanoaggregation Routes on the Structure and Thermal Behavior of Multiple-Stimuli-Responsive Micelles from Block Copolymers of Oligo(ethylene glycol) Methacrylate and the Weak Acid [2-(Hydroxyimino)aldehyde]butyl Methacrylate. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:14371-14386. [PMID: 36346681 PMCID: PMC9686140 DOI: 10.1021/acs.langmuir.2c02515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/20/2022] [Indexed: 06/16/2023]
Abstract
In this work, we compare nanoaggregation driven by pH-induced micellization (PIM) and by the standard solvent displacement (SD) method on a series of pH-, light-, and thermosensitive amphiphilic block copolymers. Specifically, we investigate poly(HIABMA)-b-poly(OEGMA) and poly(HIABMA)-b-poly(DEGMA-r-OEGMA), where HIABMA = [(hydroxyimino)aldehyde]butyl methacrylate, OEGMA = oligo(ethylene glycol)methyl ether methacrylate, and DEGMA = di(ethylene glycol)methyl ether methacrylate. The weakly acidic HIA group (pKa ≈ 8) imparts stability to micelles at neutral pH, unlike most of the pH-responsive copolymers investigated in the literature. With SD, only some of our copolymers yield polymeric micelles (34-59 nm), and their thermoresponsivity is either poor or altogether absent. In contrast, PIM affords thermoresponsive, smaller micelles (down to 24 nm), regardless of the polymer composition. In some cases, cloud points are remarkably well defined and exhibit limited hysteresis. By combining turbidimetric, dyamic light scattering, and small-angle X-ray scattering measurements, we show that SD yields loose micelles with POEGMA segments partly involved in the formation of the hydrophobic core, whereas PIM yields more compact core-shell micelles with a well-defined PHIABMA core. We conclude that pH-based nanoaggregation provides advantages over block-selective solvation to obtain compact micelles exhibiting well-defined responses to external stimuli.
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Affiliation(s)
- Irene Antignano
- Department
of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185Roma, Italy
| | - Francesca D’Acunzo
- Institute
of Biological Systems (ISB), Italian National Research Council (CNR),
Sezione Meccanismi di Reazione, c/o Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185Roma, Italy
| | - Davide Arena
- Department
of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185Roma, Italy
| | - Stefano Casciardi
- National
Institute for Insurance Against Accidents at Work (INAIL Research),
Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Via Fontana Candida 1, 00078Monte Porzio Catone (Rome), Italy
| | | | - Francesca Gentile
- Department
of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185Roma, Italy
| | - Maria Pelosi
- Department
of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185Roma, Italy
| | - Giancarlo Masci
- Department
of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185Roma, Italy
| | - Patrizia Gentili
- Department
of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185Roma, Italy
- Institute
of Biological Systems (ISB), Italian National Research Council (CNR),
Sezione Meccanismi di Reazione, c/o Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185Roma, Italy
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Sun B, Xu Z, Tang Z, Cai C, Lin J. Dot Nanopattern Self‐Assembled from Rod‐Coil Block Copolymer on Substrate. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bo Sun
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Zhanwen Xu
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Zhengmin Tang
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Chunhua Cai
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Jiaping Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic Chemistry School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
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Yuan Z, Wang J, Wang Y, Zhong Y, Zhang X, Li L, Wang J, Lincoln SF, Guo X. Redox-Controlled Voltage Responsive Micelles Assembled by Noncovalently Grafted Polymers for Controlled Drug Release. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02641] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Zhenyu Yuan
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Jie Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Yiming Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Yujie Zhong
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Xinsheng Zhang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Li Li
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Junyou Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
| | - Stephen F. Lincoln
- School of Chemistry and Physics, University of Adelaide, Adelaide, SA 5005, Australia
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, 832000 Shihezi, Xinjiang, P. R. China
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Nardi M, D'Acunzo F, Clemente M, Proietti G, Gentili P. A first study on copolymers of a methacrylate containing the 2-(hydroxyimino)aldehyde group and OEGMA. RAFT polymerization and assessment of thermal and photoresponsive polymer behavior. Polym Chem 2017. [DOI: 10.1039/c7py00975e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
RAFT copolymerization of 4-[(hydroxyimino)aldehyde]butyl methacrylate with OEGMA475 and first assessment of photoisomerization and thermal behavior of the copolymers in solution.
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Affiliation(s)
- Martina Nardi
- Dipartimento di Chimica
- Università degli Studi “La Sapienza” P.le A. Moro 5
- 00185 Rome
- Italy
- CNR
| | - Francesca D'Acunzo
- CNR
- Istituto di Metodologie Chimiche
- Sezione Meccanismi di Reazione c/o Dipartimento di Chimica
- Università degli Studi “La Sapienza” P.le A. Moro 5
- 00185 Roma
| | - Mariangela Clemente
- Dipartimento di Chimica
- Università degli Studi “La Sapienza” P.le A. Moro 5
- 00185 Rome
- Italy
| | - Giampiero Proietti
- Dipartimento di Chimica
- Università degli Studi “La Sapienza” P.le A. Moro 5
- 00185 Rome
- Italy
| | - Patrizia Gentili
- Dipartimento di Chimica
- Università degli Studi “La Sapienza” P.le A. Moro 5
- 00185 Rome
- Italy
- CNR
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