1
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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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2
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A Multiple-Stimuli-Responsive Amphiphilic Copolymer for Antifouling and Antibacterial Functionality via a “Resistance–Kill–Release” Mechanism. Molecules 2022; 27:molecules27165059. [PMID: 36014312 PMCID: PMC9416764 DOI: 10.3390/molecules27165059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 07/30/2022] [Accepted: 08/08/2022] [Indexed: 11/21/2022] Open
Abstract
In recent years, polymers with stimuli-responsive properties have been increasingly reported on due to their diverse applications. However, most of the studies have only focused on the performance of polymers under specific scenarios. The laws of changes in the properties in response to various external stimuli have been less systematically and quantitatively studied. In this paper, we prepared an amphiphilic polymer (PadaMX and PAdaM3QA−X) with temperature-, pH-, ion-, and β-cyclodextrin (β-CD)-responsive properties. According to the cloud point tested by the UV-Vis method, the lower critical soluble temperature (LCST) of PAdaM3QA−10% was more sensitive to a change in pH and less sensitive to a change in ions compared with PadaM3 due to quaternized side chains with a stronger intramolecular mutual repulsion. We then fabricated the coatings with responsive properties by immobilizing the adamantyl groups on β-CD-modified surfaces. The hydrophilicity of the coatings was improved after quaternization, as proven by the water contact angle (WCA) measurement. The antifouling and antibacterial performance was further evaluated via the fluorescence intensity of bovine serum albumin (BSA) adsorbed on the surfaces and the spread plate method. A 78.4% BSA desorption rate and a 96.8% sterilization rate were achieved by the PAdaM3QA−10% coating. In summary, this work prepared a multiple-stimuli-responsive amphiphilic copolymer for antifouling and antibacterial functionality via a “resistance–kill–release” mechanism.
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3
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Gayathri V, Jaisankar SN, Samanta D. Temperature and pH responsive polymers: sensing applications. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2021. [DOI: 10.1080/10601325.2021.1988636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Varnakumar Gayathri
- Polymer Science & Technology division, CSIR-Central Leather Research Institute, Chennai, India
- Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, India
| | - Sellamuthu Nagappan Jaisankar
- Polymer Science & Technology division, CSIR-Central Leather Research Institute, Chennai, India
- Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, India
| | - Debasis Samanta
- Polymer Science & Technology division, CSIR-Central Leather Research Institute, Chennai, India
- Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, India
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4
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Zhao Y, Ma J, Yu X, Li MH, Hu J. Tunable UCST thermoresponsive copolymers based on natural glycyrrhetinic acid. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.03.057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Muttaqien SE, Nomoto T, Dou X, Takemoto H, Matsui M, Nishiyama N. Photodynamic therapy using LCST polymers exerting pH-responsive isothermal phase transition. J Control Release 2020; 328:608-616. [DOI: 10.1016/j.jconrel.2020.09.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 09/07/2020] [Accepted: 09/18/2020] [Indexed: 12/11/2022]
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6
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Shodeinde AB, Murphy AC, Oldenkamp HF, Potdar AS, Ludolph CM, Peppas NA. Recent Advances in Smart Biomaterials for the Detection and Treatment of Autoimmune Diseases. ADVANCED FUNCTIONAL MATERIALS 2020; 30:1909556. [PMID: 33071713 PMCID: PMC7566744 DOI: 10.1002/adfm.201909556] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 01/15/2020] [Indexed: 05/07/2023]
Abstract
Autoimmune diseases are a group of debilitating illnesses that are often idiopathic in nature. The steady rise in the prevalence of these conditions warrants new approaches for diagnosis and treatment. Stimuli-responsive biomaterials also known as "smart", "intelligent" or "recognitive" biomaterials are widely studied for their applications in drug delivery, biosensing and tissue engineering due to their ability to produce thermal, optical, chemical, or structural changes upon interacting with the biological environment. This critical analysis highlights studies within the last decade that harness the recognitive capabilities of these biomaterials towards the development of novel detection and treatment options for autoimmune diseases.
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Affiliation(s)
- Aaliyah B. Shodeinde
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX, USA, 78712
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX, USA, 78712
| | - Andrew C. Murphy
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX, USA, 78712
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX, USA, 78712
| | - Heidi F. Oldenkamp
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX, USA, 78712
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX, USA, 78712
| | - Abhishek S. Potdar
- Department of Biomedical Engineering, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX, USA, 78712
| | - Catherine M. Ludolph
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX, USA, 78712
| | - Nicholas A. Peppas
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX, USA, 78712
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX, USA, 78712
- Department of Biomedical Engineering, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX, USA, 78712
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, 2409 University Ave. Stop A1900, Austin, TX, USA, 78712
- Department of Surgery and Perioperative Care, Dell Medical School, 1601 Trinity St., Bldg. B, Stop Z0800, Austin, TX, USA, 78712
- Department of Pediatrics, Dell Medical School, 1400 Barbara Jordan Blvd., Austin, TX, USA, 78723
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7
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Zhang H, Esquivel Guzman JA, Feng X, Rivera E, Lavertu M, Zhu X. Protoporphyrin IX copolymer with poly(ethylene glycol) methacrylate and its thermoresponsive properties. CAN J CHEM 2020. [DOI: 10.1139/cjc-2020-0009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Porphyrins and their derivatives have been widely used in catalysis, energy conversion, photonics, and biomedicine; however, their use in biological applications is restricted by their limited solubility in aqueous systems. We have prepared a water-soluble copolymer containing moieties of naturally occurring protoporphyrin IX using direct copolymerization of a poly(ethylene glycol) (PEG) methacrylate monomer with protoporphyrin IX via free-radical polymerization. The content of protoporphyrin IX in the copolymer was determined by 1H NMR and UV–vis absorption spectroscopies. Their solution properties and the photostability of the protoporphyrin IX moiety in the copolymer provide direct evidence of the covalent incorporation of protoporphyrin IX within the copolymer. The copolymer showed a reversible phase transition in aqueous solution due to the lower critical solution temperature (LCST). The phase transition temperature varies with the pH of the solutions because of the protonation of the carboxylic acid groups. This copolymer may be useful as an alternative thermoresponsive material for biomedical applications.
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Affiliation(s)
- Hu Zhang
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | | | - Xiantao Feng
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Ernesto Rivera
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, México DF, México
| | - Marc Lavertu
- Département de génie chimique, Polytechnique Montréal, Montréal, QC H3T 1J4, Canada
| | - X.X. Zhu
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
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8
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Frazar EM, Shah RA, Dziubla TD, Hilt JZ. Multifunctional temperature-responsive polymers as advanced biomaterials and beyond. J Appl Polym Sci 2020; 137:48770. [PMID: 34305165 PMCID: PMC8300996 DOI: 10.1002/app.48770] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 09/23/2019] [Indexed: 01/03/2023]
Abstract
The versatility and applicability of thermoresponsive polymeric systems have led to great interest and a multitude of publications. Of particular significance, multifunctional poly(N-isopropylacrylamide) (PNIPAAm) systems based on PNIPAAm copolymerized with various functional comonomers or based on PNIPAAm combined with nanomaterials exhibiting unique properties. These multifunctional PNIPAAm systems have revolutionized several biomedical fields such as controlled drug delivery, tissue engineering, self-healing materials, and beyond (e.g., environmental treatment applications). Here, we review these multifunctional PNIPAAm-based systems with various cofunctionalities, as well as highlight their unique applications. For instance, addition of hydrophilic or hydrophobic comonomers can allow for polymer lower critical solution temperature modification, which is especially helpful for physiological applications. Natural comonomers with desirable functionalities have also drawn significant attention as pressure surmounts to develop greener, more sustainable materials. Typically, these systems also tend to be more biocompatible and biodegradable and can be advantageous for use in biopharmaceutical and environmental applications. PNIPAAm-based polymeric nanocomposites are reviewed as well, where incorporation of inorganic or carbon nanomaterials creates synergistic systems that tend to be more robust and widely applicable than the individual components.
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Affiliation(s)
- E Molly Frazar
- Superfund Research Center, University of Kentucky, Lexington, Kentucky 40536
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506
| | - Rishabh A Shah
- Superfund Research Center, University of Kentucky, Lexington, Kentucky 40536
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506
| | - Thomas D Dziubla
- Superfund Research Center, University of Kentucky, Lexington, Kentucky 40536
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506
| | - J Zach Hilt
- Superfund Research Center, University of Kentucky, Lexington, Kentucky 40536
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506
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9
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Pino‐Ramos VH, Cedillo G, López‐Barriguete E, Bucio E. Comonomer effect: Switching the lower critical solution temperature to upper critical solution temperature in thermo‐pH sensitive binary graft copolymers. J Appl Polym Sci 2019. [DOI: 10.1002/app.48170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Victor H. Pino‐Ramos
- Depto. de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito ExteriorCiudad Universitaria CDMX 04510 Mexico
| | - Gerardo Cedillo
- Instituto de Investigación en MaterialesUniversidad Nacional Autónoma de México, Avenida Universidad, Ciudad Universitaria CDMX 04510 Mexico
| | - Eduardo López‐Barriguete
- Depto. de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito ExteriorCiudad Universitaria CDMX 04510 Mexico
| | - Emilio Bucio
- Depto. de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito ExteriorCiudad Universitaria CDMX 04510 Mexico
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10
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Muttaqien SE, Nomoto T, Takemoto H, Matsui M, Tomoda K, Nishiyama N. Poly( N-isopropylacrylamide)-Based Polymer-Inducing Isothermal Hydrophilic-to-Hydrophobic Phase Transition via Detachment of Hydrophilic Acid-Labile Moiety. Biomacromolecules 2019; 20:1493-1504. [PMID: 30566830 DOI: 10.1021/acs.biomac.8b01465] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The polymerization of N-isopropylacrylamide (NIPAAm) with ionizable monomers results in pH-responsive lower critical solution temperature (LCST) polymer which works in an ionization-dependent manner. However, gradual ionization of the comonomer occurs at a broad pH range due to the electrostatic field generated by the polymers, limiting the extent of LCST shift in response to pH change. Furthermore, excess introduction of comonomer may dull phase transition behavior. Here, we report the development of an ionization-independent LCST polymer that exerts a sharp isothermal hydrophilic-to-hydrophobic phase transition in response to slight pH change. Our polymer has a poly(NIPAAm/2-aminoisoprpylacrylamide (AIPAAm)) (P(NIPAAm/AIPAAm)) backbone that retains the continuous structural similarity of N-alkyl groups for preserving phase transition sensitivity, and primary amine for forming hydrophilic acid-labile 2-propionic-3-methylmaleic (PMM) amide linkage. The PMM moiety improves the polymer's hydrophilicity and drastically increases the LCST. Detachment of the PMM moiety in response to mild acidic condition (pH < 6.8) lowers the LCST to that of original P(NIPAAm/AIPAAm), permitting isothermal pH-responsive phase transition. Utilizing this mechanism, P(NIPAAm/AIPAAm) modified with PMM amide linkage exhibits a sharp hydrophilic-to-hydrophobic transition at a physiological temperature (37 °C) and, strikingly, facilitates interaction with cultured cells. Most importantly, our polymer showed significantly higher accumulation within a solid tumor after systemic injection compared to conventional PNIPAAm, which may be due to its phase transition responding to slightly acidic tumor microenvironment. Thus, this study provides a novel polymer that offers delicate control of LCST and pH-responsiveness suitable for use in even fuzzy biological environments.
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Affiliation(s)
- Sjaikhurrizal El Muttaqien
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Department of Life Science and Technology, School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Center for Pharmaceutical and Medical Technology , Agency for the Assessment and Application of Technology (BPPT), LAPTIAB I, PUSPITEK , Serpong , Banten 15314 , Indonesia
| | - Takahiro Nomoto
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Department of Life Science and Technology, School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan
| | - Hiroyasu Takemoto
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Department of Life Science and Technology, School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan
| | - Makoto Matsui
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan
| | - Keishiro Tomoda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan
| | - Nobuhiro Nishiyama
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Department of Life Science and Technology, School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Innovation Center of Nanomedicine (iCONM) , Kawasaki Institute of Industrial Promotion , 3-25-14 Tonomachi, Kawasaki-ku , Kawasaki , Kanagawa 210-0821 , Japan
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11
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Lee J, Choi EJ, Varga I, Claesson PM, Yun SH, Song C. Terpyridine-functionalized stimuli-responsive microgels and their assembly through metal–ligand interactions. Polym Chem 2018. [DOI: 10.1039/c8py00016f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We developed a terpyridine-functionalized microgel (tpy-mG) for its supramolecular assembly.
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Affiliation(s)
- Jookyeong Lee
- Department of Chemistry
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Eun Jung Choi
- Department of Chemistry
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Imre Varga
- Institute of Chemistry
- Eötvös Loránd University
- 1117 Budapest
- Hungary
| | - Per M. Claesson
- KTH Royal Institute of Technology
- School of Engineering Sciences in Chemistry
- Biotechnology and Health
- Department of Chemistry
- Surface and Corrosion Science
| | - Sang-Ho Yun
- Department of Mechanical Engineering
- Inha University
- Incheon
- Republic of Korea
| | - Changsik Song
- Department of Chemistry
- Sungkyunkwan University
- Suwon
- Republic of Korea
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12
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So S, Hayward RC. Tunable Upper Critical Solution Temperature of Poly(N-isopropylacrylamide) in Ionic Liquids for Sequential and Reversible Self-Folding. ACS APPLIED MATERIALS & INTERFACES 2017; 9:15785-15790. [PMID: 28452457 DOI: 10.1021/acsami.7b02953] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We demonstrate sequential folding of micropatterned polymer actuators by tuning the upper critical solution temperature (UCST) of poly(N-isopropylacrylamide) (PNIPAM) copolymers in the ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoro-methylsulfonyl) imide. Incorporation of comonomers having different hydrogen-bonding capacities, acrylic acid and methyl acrylate, is shown to shift the UCST of PNIPAM to higher and lower temperatures, respectively. Relying on the ability to tune the transition temperature through copolymerization along with the wide thermal range afforded by the IL as a solvent, we fabricated a photopatterned self-folding device which shows reversible and sequential bending of three sets of hinges. Such sequential and reversible bending of microactuators offers potential for the design of complex self-folding origami and soft robots.
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Affiliation(s)
- Soonyong So
- Department of Polymer Science and Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
- Center for Membranes, Korea Research Institute of Chemical Technology , Daejeon 34114, South Korea
| | - Ryan C Hayward
- Department of Polymer Science and Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
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13
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Abstract
Stimuli-responsive polymers respond to a variety of external stimuli, which include optical, electrical, thermal, mechanical, redox, pH, chemical, environmental and biological signals. This paper is concerned with the process of forming such polymers by RAFT polymerization.
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14
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Kong T, Guo G, Zhang H, Gao L. Post-synthetic modification of polyvinyl alcohol with a series of N-alkyl-substituted carbamates towards thermo and CO2-responsive polymers. Polym Chem 2017. [DOI: 10.1039/c7py01136a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Intensive efforts have been devoted to the synthesis of thermoresponsive polymers with terminal N-alkyl-substituted groups.
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Affiliation(s)
- Tengfei Kong
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
| | - Guoqiang Guo
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
| | - Huatang Zhang
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
| | - Liang Gao
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou
- China
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15
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Zhang H, Guo S, Fan W, Zhao Y. Ultrasensitive pH-Induced Water Solubility Switch Using UCST Polymers. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02522] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Hu Zhang
- Département
de chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1
| | - Shengwei Guo
- Département
de chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1
- School of Material Science & Engineering, Beifang University of Nationalities, Yinchuan, China 750021
| | - Weizheng Fan
- Département
de chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1
| | - Yue Zhao
- Département
de chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1
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16
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Swift T, Lapworth J, Swindells K, Swanson L, Rimmer S. pH responsive highly branched poly(N-isopropylacrylamide) with trihistidine or acid chain ends. RSC Adv 2016. [DOI: 10.1039/c6ra13139e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Thermally responsive highly branched poly(N-isopropyl acrylamide)s (HB-PNIPAM) were prepared and end-functionalised to give polymers with acid or trihistidine end groups. The ionisation of the end groups affects the swelling of desolvated globules.
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Affiliation(s)
- T. Swift
- Polymer and Biomaterials Laboratory
- Department of Chemistry and Forensic Science
- University of Bradford
- Bradford
- UK
| | - J. Lapworth
- Department of Chemistry
- University of Sheffield
- UK
| | - K. Swindells
- Department of Chemistry
- University of Sheffield
- UK
| | - L. Swanson
- Department of Chemistry
- University of Sheffield
- UK
| | - S. Rimmer
- Polymer and Biomaterials Laboratory
- Department of Chemistry and Forensic Science
- University of Bradford
- Bradford
- UK
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17
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Wang K, Song Z, Liu C, Zhang W. RAFT synthesis of triply responsive poly[N-[2-(dialkylamino)ethyl]acrylamide]s and their N-substitute determined response. Polym Chem 2016. [DOI: 10.1039/c6py00526h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The thermo- and pH/CO2-responsive poly[N-[2-(dialkylamino)ethyl]acrylamide]s containing a polyacrylamide backbone but different N-substitutes of dialkylamine were synthesized and their solution properties were comparatively checked.
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Affiliation(s)
- Ke Wang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Zefeng Song
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Chonggao Liu
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Wangqing Zhang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
- China
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