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Length-scale dependence of pH- and temperature-response of PDMAEMA-b-PHPMA block copolymer self-assemblies in aqueous solutions. POLYMER 2022. [DOI: 10.1016/j.polymer.2021.124428] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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2
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Polo Fonseca L, Felisberti MI. Thermo- and UV-responsive amphiphilic nanogels via reversible [4+4] photocycloaddition of PEG/PCL-based polyurethane dispersions. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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3
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Constantinou AP, Zhang K, Somuncuoğlu B, Feng B, Georgiou TK. PEG-Based Methacrylate Tetrablock Terpolymers: How Does the Architecture Control the Gelation? Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna P. Constantinou
- Department of Materials, Royal School of Mines, Imperial College London, Exhibition Road, SW7 2AZ London, United Kingdom
| | - Kaiwen Zhang
- Department of Materials, Royal School of Mines, Imperial College London, Exhibition Road, SW7 2AZ London, United Kingdom
| | - Birsen Somuncuoğlu
- Department of Materials, Royal School of Mines, Imperial College London, Exhibition Road, SW7 2AZ London, United Kingdom
| | - Bailin Feng
- Department of Materials, Royal School of Mines, Imperial College London, Exhibition Road, SW7 2AZ London, United Kingdom
| | - Theoni K. Georgiou
- Department of Materials, Royal School of Mines, Imperial College London, Exhibition Road, SW7 2AZ London, United Kingdom
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4
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Arcos-Hernandez M, Naidjonoka P, Butler SJ, Nylander T, Stålbrand H, Jannasch P. Thermoresponsive Glycopolymers Based on Enzymatically Synthesized Oligo-β-Mannosyl Ethyl Methacrylates and N-Isopropylacrylamide. Biomacromolecules 2021; 22:2338-2351. [PMID: 33961400 PMCID: PMC8382249 DOI: 10.1021/acs.biomac.0c01615] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 04/16/2021] [Indexed: 11/28/2022]
Abstract
We present here a series of thermoresponsive glycopolymers in the form of poly(N-isopropylacrylamide)-co-(2-[β-manno[oligo]syloxy] ethyl methacrylate)s. These copolymers were prepared from oligo-β-mannosyl ethyl methacrylates that were synthesized through enzymatic catalysis, and were subsequently investigated with respect to their aggregation and phase behavior in aqueous solution using a combination of 1H NMR spectroscopy, dynamic light scattering, cryogenic transmission electron microscopy (TEM), and small-angle X-ray scattering (SAXS). The thermoresponsive glycopolymers were prepared by conventional free radical copolymerization of different mixtures of 2-(β-manno[oligo]syloxy)ethyl methacrylates (with either one or two saccharide units) and N-isopropylacrylamide (NIPAm). The results showed that below the lower critical solution temperature (LCST) of poly(NIPAm), the glycopolymers readily aggregate into nanoscale structures, partly due to the presence of the saccharide moieties. Above the LCST of poly(NIPAm), the glycopolymers rearrange into a heterogeneous mixture of fractal and disc/globular aggregates. Cryo-TEM and SAXS data demonstrated that the presence of the pendant β-mannosyl moieties in the glycopolymers induces a gradual conformational change over a wide temperature range. Even though the onset of this transition is not different from the LCST of poly(NIPAm), the gradual conformational change offers a variation of the temperature-dependent properties in comparison to poly(NIPAm), which displays a sharp coil-to-globule transition. Importantly, the compacted form of the glycopolymers shows a larger colloidal stability compared to the unmodified poly(NIPAm). In addition, the thermoresponsiveness can be conveniently tuned by varying the sugar unit-length and the oligo-β-mannosyl ethyl methacrylate content.
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Affiliation(s)
- Monica Arcos-Hernandez
- Centre
for Analysis and Synthesis, Department of Chemistry, Lund University, S-221 00 Lund, Sweden
| | - Polina Naidjonoka
- Physical
Chemistry, Department of Chemistry, Lund
University, S-221 00 Lund, Sweden
| | - Samuel J. Butler
- Department
of Biochemistry and Structural Biology, Department of Chemistry, Lund University, S-221 00 Lund, Sweden
| | - Tommy Nylander
- Physical
Chemistry, Department of Chemistry, Lund
University, S-221 00 Lund, Sweden
| | - Henrik Stålbrand
- Department
of Biochemistry and Structural Biology, Department of Chemistry, Lund University, S-221 00 Lund, Sweden
| | - Patric Jannasch
- Centre
for Analysis and Synthesis, Department of Chemistry, Lund University, S-221 00 Lund, Sweden
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5
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Du G, Del Giudice A, Alfredsson V, Carnerup AM, Pavel NV, Loh W, Masci G, Nyström B, Galantini L, Schillén K. Effect of temperature on the association behavior in aqueous mixtures of an oppositely charged amphiphilic block copolymer and bile salt. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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6
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Li L, Wang R, Xing X, Qu W, Chen S, Zhang Y. Preparation of porous semi-IPN temperature-sensitive hydrogel-supported nZVI and its application in the reduction of nitrophenol. J Environ Sci (China) 2019; 82:93-102. [PMID: 31133273 DOI: 10.1016/j.jes.2019.02.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/24/2019] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
Nanoscale zero-valent iron (nZVI) particles supported on a porous, semi-interpenetrating (semi-IPN), temperature-sensitive composite hydrogel (PNIPAm-PHEMA). nZVI@PNIPAm-PHEMA, was successfully synthesized and characterized by FT-IR, SEM, EDS, XRD and the weighing method. The loading of nZVI was 0.1548 ± 0.0015 g/g and the particle size was 30-100 nm. NZVI was uniformly dispersed on the pore walls inside the PNIPAm-PHEMA. Because of the well-dispersed nZVI, the highly porous structure, and the synergistic effect of PNIPAm-PHEMA, nZVI@PNIPAm-PHEMA showed excellent reductive activity and wide pH applicability. 95% of 4-NP in 100 mL of 400 mg/L 4-NP solution with initial pH 3.0-9.0 could be completely reduced into 4-AP by about 0.0548 g of fresh supported nZVI at 18-25 °C under stirring (110 r/min) within 45 min reaction time. A greater than 99% 4-NP degradation ratio was obtained when the initial pH was 5.0-9.0. The reduction of 4-NP by nZVI@PNIPAm-PHEMA was in agreement with the pseudo-first-order kinetics model with Kobs values of 0.0885-0.101 min-1. NZVI@PNIPAm-PHEMA was able to be recycled, and about 85% degradation ratio of 4-NP was obtained after its sixth reuse cycle. According to the temperature sensitivity of PNIPAm-PHEMA, nZVI@PNIPAm-PHEMA exhibited very good storage stability, and about 88.9% degradation ratio of 4-NP was obtained after its storage for 30 days. The hybrid reducer was highly efficient for the reduction of 2-NP, 3-NP, 2-chloro-4-nitrophenol and 2-chloro-4-nitrophenol. Our results suggest that PNIPAm-PHEMA could be a good potential carrier, with nZVI@PNIPAm-PHEMA having potential value in the application of reductive degradation of nitrophenol pollutants.
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Affiliation(s)
- Lixia Li
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Ruiwei Wang
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xiaodong Xing
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 310014, China.
| | - Wenqiang Qu
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shutong Chen
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yunlong Zhang
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China
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7
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Effect of N-isopropylacrylamide thermoresponsive blocks on the rheological properties of water-soluble thermoassociative copolymers synthesized via RAFT polymerization. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4391-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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8
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Salah I, Shamat MA, Cook MT. Soluplus solutions as thermothickening materials for topical drug delivery. J Appl Polym Sci 2018. [DOI: 10.1002/app.46915] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- I. Salah
- Department of Clinical and Pharmaceutical Sciences; Centre for Research in Topical Drug Delivery and Toxicology, University of Hertfordshire; Hatfield, Hertfordshire AL10 9AB UK
| | - M. Abou Shamat
- Department of Clinical and Pharmaceutical Sciences; Centre for Research in Topical Drug Delivery and Toxicology, University of Hertfordshire; Hatfield, Hertfordshire AL10 9AB UK
| | - M. T. Cook
- Department of Clinical and Pharmaceutical Sciences; Centre for Research in Topical Drug Delivery and Toxicology, University of Hertfordshire; Hatfield, Hertfordshire AL10 9AB UK
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9
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Huber RO, Beebe JM, Smith PB, Howell BA, Ahn D. Facile Synthesis of Thermoresponsive Poly(NIPAAm-g-PDMS) Copolymers Using Room Temperature Alkylborane Chemistry. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00252] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert O. Huber
- The Dow Chemical
Company (formerly Dow Corning Corporation), 2200 West Salzburg Road, Midland, Michigan 48686, United States
- Department of Chemistry and Biochemistry, Central Michigan University, Dow Science Complex 263, Mount Pleasant, Michigan 48859, United States
| | - Jeremy M. Beebe
- The Dow Chemical
Company (formerly Dow Corning Corporation), 2200 West Salzburg Road, Midland, Michigan 48686, United States
| | - Patrick B. Smith
- Michigan State University, 1910 West St. Andrews Road, Midland, Michigan 48640, United States
| | - Bob A. Howell
- Department of Chemistry and Biochemistry, Central Michigan University, Dow Science Complex 263, Mount Pleasant, Michigan 48859, United States
| | - Dongchan Ahn
- The Dow Chemical
Company (formerly Dow Corning Corporation), 2200 West Salzburg Road, Midland, Michigan 48686, United States
- Department of Chemistry and Biochemistry, Central Michigan University, Dow Science Complex 263, Mount Pleasant, Michigan 48859, United States
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10
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Vandewalle S, Van De Walle M, Chattopadhyay S, Du Prez F. Polycaprolactone-b-poly(N-isopropylacrylamide) nanoparticles: Synthesis and temperature induced coacervation behavior. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2017.11.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Kurzhals S, Schroffenegger M, Gal N, Zirbs R, Reimhult E. Influence of Grafted Block Copolymer Structure on Thermoresponsiveness of Superparamagnetic Core-Shell Nanoparticles. Biomacromolecules 2017; 19:1435-1444. [PMID: 29161516 PMCID: PMC5954351 DOI: 10.1021/acs.biomac.7b01403] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
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The
morphology and topology of thermoresponsive polymers have a
strong impact on their responsive properties. Grafting onto spherical
particles has been shown to reduce responsiveness and transition temperatures;
grafting of block copolymers has shown that switchable or retained
wettability of a surface or particle during desolvation of one block
can take place. Here, doubly thermoresponsive block copolymers were
grafted onto spherical, monodisperse, and superparamagnetic iron oxide
nanoparticles to investigate the effect of thermal desolvation on
spherical brushes of block copolymers. By inverting the block order,
the influence of core proximity on the responsive properties of the
individual blocks could be studied as well as their relative influence
on the nanoparticle colloidal stability. The inner block was shown
to experience a stronger reduction in transition temperature and transition
enthalpy compared to the outer block. Still, the outer block also
experiences a significant reduction in responsiveness due to the restricted
environment in the nanoparticle shell compared to that of the free
polymer state. The demonstrated pronounced distance dependence importantly
implies the possibility, but also the necessity, to radially tailor
polymer hydration transitions for applications such as drug delivery,
hyperthermia, and biotechnological separation for which thermally
responsive nanoparticles are being developed.
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Affiliation(s)
- Steffen Kurzhals
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Martina Schroffenegger
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Noga Gal
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Ronald Zirbs
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Erik Reimhult
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
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