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Müller W, Schweins R, Nöcker B, Egold H, Hannappel Y, Huber K. SANS contrast matching for the unambiguous localization of anionic dye in cationic surfactant micelles. NANOSCALE ADVANCES 2023; 5:5367-5384. [PMID: 37767037 PMCID: PMC10521298 DOI: 10.1039/d3na00556a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023]
Abstract
Contrast variation in small-angle neutron scattering (SANS) was successfully applied to localize the anionic azo dye Blue in co-assemblies with the cationic surfactant dodecyltrimethylammoniumbromide (DTAB). For this purpose, the scattering contrast between DTAB and the aqueous solvent was eliminated by SANS contrast matching, leaving only the scattering signal from Blue to be detected. Results obtained by contrast matching were confirmed by NOESY NMR-spectroscopy, showing that Blue interacts with the positively charged DTAB head groups and with up to the 4th neighbouring methylene group of the DTAB C12-alkyl chain. Its localization in the outer layer of the Blue-DTAB co-assembly explains the uniaxial growth of spheroidal DTAB micelles to wormlike micelles with increasing [Blue] : [DTAB] ratio from 0 : 1 to 1 : 3. This is in line with the concept of the packing parameter for amphiphilic substances.
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Affiliation(s)
- Wenke Müller
- Institut Laue-Langevin, DS/LSS 71 Avenue des Martyrs 38000 Grenoble France
| | - Ralf Schweins
- Institut Laue-Langevin, DS/LSS 71 Avenue des Martyrs 38000 Grenoble France
| | - Bernd Nöcker
- KAO Germany GmbH Pfungstädter Straße 98-100 64297 Darmstadt Germany
| | - Hans Egold
- Universität Paderborn Warburger Straße 100 33098 Paderborn Germany
| | - Yvonne Hannappel
- Universität Bielefeld Universitätsstrasse 25 33615 Bielefeld Germany
| | - Klaus Huber
- Universität Paderborn Warburger Straße 100 33098 Paderborn Germany
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2
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Du G, Belić D, Del Giudice A, Alfredsson V, Carnerup AM, Zhu K, Nyström B, Wang Y, Galantini L, Schillén K. Condensed Supramolecular Helices: The Twisted Sisters of DNA. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202113279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Guanqun Du
- Division of Physical Chemistry Department of Chemistry Lund University P.O. Box 124 22100 Lund Sweden
| | - Domagoj Belić
- Division of Physical Chemistry Department of Chemistry Lund University P.O. Box 124 22100 Lund Sweden
- Department of Physics Josip Juraj Strossmayer University of Osijek 31000 Osijek Croatia
| | - Alessandra Del Giudice
- Department of Chemistry Sapienza University of Rome P.O. Box 34-Roma 62, Piazzale A. Moro 5 00185 Roma Italy
| | - Viveka Alfredsson
- Division of Physical Chemistry Department of Chemistry Lund University P.O. Box 124 22100 Lund Sweden
| | - Anna M. Carnerup
- Division of Physical Chemistry Department of Chemistry Lund University P.O. Box 124 22100 Lund Sweden
| | - Kaizheng Zhu
- Department of Chemistry University of Oslo P.O. Box 1033, Blindern 0315 Oslo Norway
| | - Bo Nyström
- Department of Chemistry University of Oslo P.O. Box 1033, Blindern 0315 Oslo Norway
| | - Yilin Wang
- Key Laboratory of Colloid and Interface Science Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Luciano Galantini
- Department of Chemistry Sapienza University of Rome P.O. Box 34-Roma 62, Piazzale A. Moro 5 00185 Roma Italy
| | - Karin Schillén
- Division of Physical Chemistry Department of Chemistry Lund University P.O. Box 124 22100 Lund Sweden
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3
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Du G, Belić D, Del Giudice A, Alfredsson V, Carnerup AM, Zhu K, Nyström B, Wang Y, Galantini L, Schillén K. Condensed Supramolecular Helices: The Twisted Sisters of DNA. Angew Chem Int Ed Engl 2021; 61:e202113279. [PMID: 34757695 PMCID: PMC9300030 DOI: 10.1002/anie.202113279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Indexed: 11/07/2022]
Abstract
Condensation of DNA helices into hexagonally packed bundles and toroids represents an intriguing example of functional organization of biological macromolecules at the nanoscale. The condensation models are based on the unique polyelectrolyte features of DNA, however here we could reproduce a DNA‐like condensation with supramolecular helices of small chiral molecules, thereby demonstrating that it is a more general phenomenon. We show that the bile salt sodium deoxycholate can form supramolecular helices upon interaction with oppositely charged polyelectrolytes of homopolymer or block copolymers. At higher order, a controlled hexagonal packing of the helices into DNA‐like bundles and toroids could be accomplished. The results disclose unknown similarities between covalent and supramolecular non‐covalent helical polyelectrolytes, which inspire visionary ideas of constructing supramolecular versions of biological macromolecules. As drug nanocarriers the polymer–bile salt superstructures would get advantage of a complex chirality at molecular and supramolecular levels, whose effect on the nanocarrier assisted drug efficiency is a still unexplored fascinating issue.
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Affiliation(s)
- Guanqun Du
- Lund University: Lunds Universitet, Division of Physical Chemistry, Department of Chemistry, P.O. Box 124, SE-22100, Lund, SWEDEN
| | - Domagoj Belić
- Lund University: Lunds Universitet, Division of Physical Chemistry, Department of Chemistry, P.O. Box 124, SE-22100, Lund, SWEDEN
| | - Alessandra Del Giudice
- Sapienza University of Rome: Universita degli Studi di Roma La Sapienza, Department of Chemistry, Piazzale A. Moro 5, I-00185, Rome, ITALY
| | - Viveka Alfredsson
- Lund University: Lunds Universitet, Department of Chemistry, P.O. Box 124, SE-22100, Lund, SWEDEN
| | - Anna M Carnerup
- Lund University: Lunds Universitet, Division of Physical Chemistry, Department of Chemistry, P.O. Box 124, SE-22100, Lund, SWEDEN
| | - Kaizheng Zhu
- University of Oslo: Universitetet i Oslo, Deparment of Chemistry, P.O. Box 1033, N-0315, Oslo, NORWAY
| | - Bo Nyström
- University of Oslo: Universitetet i Oslo, Department of Chemistry, P.O. Box 1033, N-0315, Oslo, NORWAY
| | - Yilin Wang
- Institute of Chemistry Chinese Academy of Sciences, Key Laboratory of Colloid and Interface Science, Beijing National Laboratory for Molecular Science, 100190, Beijing, CHINA
| | - Luciano Galantini
- Sapienza University of Rome: Universita degli Studi di Roma La Sapienza, Department of Chemistry, Piazzale A. Moro 5, I-00185, Rome, ITALY
| | - Karin Schillén
- Lund University, Division of Physical Chemistry, Department of Chemistry, Center for Chemistry and Chemical Engineering, P.O. Box 124, SE-221 00, Lund, SWEDEN
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4
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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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5
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Zhong Q, Chen C, Mi L, Wang JP, Yang J, Wu GP, Xu ZK, Cubitt R, Müller-Buschbaum P. Thermoresponsive Diblock Copolymer Films with a Linear Shrinkage Behavior and Its Potential Application in Temperature Sensors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:742-753. [PMID: 31895574 DOI: 10.1021/acs.langmuir.9b03462] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The linear shrinkage behavior in thermoresponsive diblock copolymer films and its potential application in temperature sensors are investigated. The copolymer is composed of two thermoresponsive blocks with different transition temperatures (TTs): di(ethylene glycol) methyl ether methacrylate (MEO2MA; TT1 = 25 °C) and poly(ethylene glycol) methyl ether methacrylate (OEGMA300; TT2 = 60 °C) with a molar ratio of 1:1. Aqueous solutions of PMEO2MA-b-POEGMA300 show a three-stage transition upon heating as seen with optical transmittance and small-angle X-ray scattering: dissolution (T < TT1), self-assembled micelles with core-shell structure (TT1 < T < TT2), and aggregation of collapsed micelles (T > TT2). Due to the restrictions in the polymer chain arrangement introduced by the solid Si substrate, spin-coated PMEO2MA-b-POEGMA300 films exhibit an entirely different internal structure and transition behavior. Neutron reflectivity shows the absence of an ordered structure normal to the Si substrate in as-prepared PMEO2MA-b-POEGMA300 films. After exposure to D2O vapor for 3 h and then increasing the temperature above its TT1 and TT2, the ordered structure is still not observed. Only a D2O enrichment layer is formed close to the hydrophilic Si substrate. Such PMEO2MA-b-POEGMA300 films show a linear shrinkage between TT1 and TT2 in a D2O vapor atmosphere. This special behavior can be attributed to the synergistic effect between the restrained collapse of the PMEO2MA blocks by the still swollen POEGMA300 blocks and the impedance of chain arrangement by the Si substrate. Based on this unique behavior, spin-coated PMEO2MA-b-POEGMA300 films are further prepared into a temperature sensor by implementing Ag electrodes. Its resistance decreases linearly with temperature between TT1 and TT2.
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Affiliation(s)
- Qi Zhong
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education , Zhejiang Sci-Tech University , 310018 Hangzhou , China
- Physik-Department, Lehrstuhl für Funktionelle Materialien , Technische Universität München , James-Franck-Str. 1 , 85748 Garching , Germany
| | - Chen Chen
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education , Zhejiang Sci-Tech University , 310018 Hangzhou , China
| | - Lei Mi
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education , Zhejiang Sci-Tech University , 310018 Hangzhou , China
| | - Ji-Ping Wang
- Shanghai University of Engineering Science , 333 Long Teng Road , 201620 Shanghai , China
| | - Jing Yang
- MOE Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Guang-Peng Wu
- MOE Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Zhi-Kang Xu
- MOE Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Robert Cubitt
- Institut Laue-Langevin , 6 rue Jules Horowitz , 38000 Grenoble , France
| | - Peter Müller-Buschbaum
- Physik-Department, Lehrstuhl für Funktionelle Materialien , Technische Universität München , James-Franck-Str. 1 , 85748 Garching , Germany
- Heinz Maier-Leibnitz Zentrum (MLZ) , Technische Universität München , Lichtenbergstr. 1 , 85748 Garching , Germany
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Hayashi M, Chen L. Functionalization of triblock copolymer elastomers by cross-linking the end blocks via trans-N-alkylation-based exchangeable bonds. Polym Chem 2020. [DOI: 10.1039/c9py01759c] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Functionalization of ABA triblock copolymer-based materials is achieved by incorporating dynamic covalent bonded cross-links via trans-N-alkylation in glassy A block domains.
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Affiliation(s)
- Mikihiro Hayashi
- Department of Life Science and Applied Chemistry
- Graduated School of Engineering
- Nagoya Institute of Technology
- Nagoya-city
- Japan
| | - Lei Chen
- Department of Life Science and Applied Chemistry
- Graduated School of Engineering
- Nagoya Institute of Technology
- Nagoya-city
- Japan
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Amann M, Diget JS, Lyngsø J, Pedersen JS, Narayanan T, Lund R. Kinetic Pathways for Polyelectrolyte Coacervate Micelle Formation Revealed by Time-Resolved Synchrotron SAXS. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01072] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Matthias Amann
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Jakob Stensgaard Diget
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Jeppe Lyngsø
- Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, 8000 Aarhus, Denmark
| | - Jan Skov Pedersen
- Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, 8000 Aarhus, Denmark
| | - Theyencheri Narayanan
- European Synchrotron Radiation Facility (ESRF), 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Reidar Lund
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
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8
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Fehér B, Zhu K, Nyström B, Varga I, Pedersen JS. Effect of Temperature and Ionic Strength on Micellar Aggregates of Oppositely Charged Thermoresponsive Block Copolymer Polyelectrolytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13614-13623. [PMID: 31577150 DOI: 10.1021/acs.langmuir.9b01896] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The self-assembly of two oppositely charged diblock copolymers that have a common thermosensitive nonionic block of poly(N-isopropylacrylamide) (pNIPAAM) has been investigated. The effect of the mixing ratio and total polymer concentrations on the self-assembly of the components and on the phase stability of the mixtures was studied by dynamic light scattering, electrophoretic mobility, and turbidimetry measurements in water at 20 °C. The effect of the competing electrostatic and hydrophobic interactions on the nanostructure of negatively charged electrostatically self-assembled micelles bearing a pNIPAAM corona was investigated by small-angle X-ray scattering (SAXS). The electrostatic and hydrophobic interactions were controlled independently by tuning the ionic strength (from pure water to 50 mM NaCl) and the temperature (20-50 °C) of the investigated mixtures. The SAXS data could be fitted by a spherical micelle model, which has a smoothly decaying radial profile and a Gaussian star term that describes the internal structure of the micellar structures and possible attractive interactions between the polymer chains. At high temperature, a cluster structure factor was included for describing the formation of bulky clusters of the formed micelles. At low temperature and ionic strength, the formation of micelles with a coacervate core and hydrated pNIPAAM shell was observed. The structural evolution of the self-assembled micelles with increasing ionic strength and temperature could be followed, and finally at high ionic strength and temperature, the formation of inverted micelles with a hydrophobic core and polyelectrolyte shell could be identified.
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Affiliation(s)
- Bence Fehér
- Institute of Chemistry , ELTE , Pázmány Péter sétány 1/A , Budapest 1117 , Hungary
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO) , Aarhus University , Gustav Wieds Vej 14 , 8000 Aarhus C , Denmark
| | - Kaizheng Zhu
- Department of Chemistry , University of Oslo , P.O. Box 1033, Blindern , N-0315 Oslo , Norway
| | - Bo Nyström
- Department of Chemistry , University of Oslo , P.O. Box 1033, Blindern , N-0315 Oslo , Norway
| | - Imre Varga
- Institute of Chemistry , ELTE , Pázmány Péter sétány 1/A , Budapest 1117 , Hungary
| | - Jan Skov Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO) , Aarhus University , Gustav Wieds Vej 14 , 8000 Aarhus C , Denmark
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Schillén K, Galantini L, Du G, Del Giudice A, Alfredsson V, Carnerup AM, Pavel NV, Masci G, Nyström B. Block copolymers as bile salt sequestrants: intriguing structures formed in a mixture of an oppositely charged amphiphilic block copolymer and bile salt. Phys Chem Chem Phys 2019; 21:12518-12529. [PMID: 31145393 DOI: 10.1039/c9cp01744e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
To study the formation and characterize the structure of mixed complexes of oppositely charged block copolymers and surfactants are of great significance for practical applications, e.g., in drug carrier formulations that are based on electrostatically assisted assembly. In this context, biocompatible block copolymers and biosurfactants (like bile salts) are particularly interesting. In this work, we report on the co-assembly in dilute aqueous solution between a cationic poly(N-isopropyl acryl amide) (PNIPAM) diblock copolymer and the oppositely charged bile salt surfactant sodium deoxycholate at ambient temperature. The cryogenic transmission electron microscopy (cryo-TEM) experiments revealed the co-existence of two types of co-assembled complexes of radically different morphology and inner structure. They are formed mainly as a result of the electrostatic attraction between the positively charged copolymer blocks and bile salt anions and highlight the potential of using linear amphiphilic block copolymers as bile salt sequestrants in the treatment of bile acid malabsorption and hypercholesterolemia. The first complex of globular morphology has a coacervate core of deoxycholate anions and charged copolymer blocks surrounded by a PNIPAM corona. The second complex has an intriguing tape-like supramolecular morphology of several micrometer in length that is striped in the direction of the long axis. A model is presented in which the stretched cationic blocks of several block copolymers interact electrostatically with the bile salt molecules that are associated to form a zipper-like structure. The tape is covered on both sides by the PNIPAM chains that stabilize the overall complex in solution. In addition to cryo-TEM, the mixed system was investigated in a range of molar charge fractions at a constant copolymer concentration by static light scattering, small angle X-ray scattering, and electrophoretic mobility measurements.
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Affiliation(s)
- Karin Schillén
- Division of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.
| | - Luciano Galantini
- Department of Chemistry, Sapienza University of Rome, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy.
| | - Guanqun Du
- Division of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.
| | - Alessandra Del Giudice
- Department of Chemistry, Sapienza University of Rome, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy.
| | - Viveka Alfredsson
- Division of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.
| | - Anna M Carnerup
- Division of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.
| | - Nicolae V Pavel
- Department of Chemistry, Sapienza University of Rome, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy.
| | - Giancarlo Masci
- Department of Chemistry, Sapienza University of Rome, P.O. Box 34-Roma 62, Piazzale A. Moro 5, I-00185 Roma, Italy.
| | - Bo Nyström
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern N-0315, Oslo, Norway
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Zajforoushan Moghaddam S, Zhu K, Nyström B, Thormann E. Thermo-responsive diblock and triblock cationic copolymers at the silica/aqueous interface: A QCM-D and AFM study. J Colloid Interface Sci 2017. [DOI: 10.1016/j.jcis.2017.06.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Bayati S, Bergquist KE, Zhu K, Nyström B, Skov Pedersen J, Galantini L, Schillén K. Mixed micelles of oppositely charged poly(N-isopropylacrylamide) diblock copolymers. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24403] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Solmaz Bayati
- Division of Physical Chemistry, Department of Chemistry; Lund University; P.O. Box 124 SE-221 00 Lund Sweden
| | - Karl-Erik Bergquist
- Center for Analysis and Synthesis; Department of Chemistry, Lund University; P.O. Box 124 SE-221 00 Lund Sweden
| | - Kaizheng Zhu
- Department of Chemistry; University of Oslo; Postboks 1033 0315 Blindern Oslo Norway
| | - Bo Nyström
- Department of Chemistry; University of Oslo; Postboks 1033 0315 Blindern Oslo Norway
| | - Jan Skov Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Luciano Galantini
- Department of Chemistry; “La Sapienza” University of Rome; P. le A. Moro 5 00185 Rome Italy
| | - Karin Schillén
- Division of Physical Chemistry, Department of Chemistry; Lund University; P.O. Box 124 SE-221 00 Lund Sweden
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12
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Khorshid NK, Zhu K, Knudsen KD, Bekhradnia S, Sande SA, Nyström B. Novel Structural Changes during Temperature-Induced Self-Assembling and Gelation of PLGA-PEG-PLGA Triblock Copolymer in Aqueous Solutions. Macromol Biosci 2016; 16:1838-1852. [DOI: 10.1002/mabi.201600277] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 08/19/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Neda Khameh Khorshid
- Department of Chemistry; University of Oslo; P.O. Box 1033 Blindern N-0315 Oslo Norway
| | - Kaizheng Zhu
- Department of Chemistry; University of Oslo; P.O. Box 1033 Blindern N-0315 Oslo Norway
| | - Kenneth D. Knudsen
- Department of Physics; Institute for Energy Technology; P. O. Box 40 N-2027 Kjeller Norway
| | - Sara Bekhradnia
- Department of Chemistry; University of Oslo; P.O. Box 1033 Blindern N-0315 Oslo Norway
| | - Sverre Arne Sande
- School of Pharmacy; Department of Pharmaceutics; University of Oslo; P.O. Box 1068 Blindern N-0316 Oslo Norway
| | - Bo Nyström
- Department of Chemistry; University of Oslo; P.O. Box 1033 Blindern N-0315 Oslo Norway
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Kahnamouei F, Zhu K, Lund R, Knudsen KD, Nyström B. Self-assembly of a hydrophobically end-capped charged amphiphilic triblock copolymer: effects of temperature and salinity. RSC Adv 2015. [DOI: 10.1039/c5ra07657a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study elucidates the intricate interplay between hydrophobic and electrostatic interactions in aqueous solutions of a responsive charged triblock copolymer.
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Affiliation(s)
| | - Kaizheng Zhu
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
| | - Reidar Lund
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
| | - Kenneth D. Knudsen
- Department of Physics
- Institute for Energy Technology
- N-2027 Kjeller
- Norway
| | - Bo Nyström
- Department of Chemistry
- University of Oslo
- N-0315 Oslo
- Norway
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14
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Yao K, Chen Y, Zhang J, Bunyard C, Tang C. Cationic Salt-Responsive Bottle-Brush Polymers. Macromol Rapid Commun 2013; 34:645-51. [DOI: 10.1002/marc.201300088] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 03/05/2013] [Indexed: 01/11/2023]
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15
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16
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Bayati S, Zhu K, Trinh LTT, Kjøniksen AL, Nyström B. Effects of Temperature and Salt Addition on the Association Behavior of Charged Amphiphilic Diblock Copolymers in Aqueous Solution. J Phys Chem B 2012; 116:11386-95. [DOI: 10.1021/jp306833x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Solmaz Bayati
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315
Oslo, Norway
| | - Kaizheng Zhu
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315
Oslo, Norway
| | - Loan T. T. Trinh
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315
Oslo, Norway
| | - Anna-Lena Kjøniksen
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315
Oslo, Norway
- Department
of Pharmaceutics,
School of Pharmacy, University of Oslo,
P.O. Box 1068, Blindern, N-0316 Oslo, Norway
| | - Bo Nyström
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315
Oslo, Norway
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