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Kanduč M, Stubenrauch C, Miller R, Schneck E. Interface Adsorption versus Bulk Micellization of Surfactants: Insights from Molecular Simulations. J Chem Theory Comput 2024; 20:1568-1578. [PMID: 37216476 PMCID: PMC10902850 DOI: 10.1021/acs.jctc.3c00223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Surfactants play essential roles in many commonplace applications and industrial processes. Although significant progress has been made over the past decades with regard to model-based predictions of the behavior of surfactants, important challenges have remained. Notably, the characteristic time scales of surfactant exchange among micelles, interfaces, and the bulk solution typically exceed the time scales currently accessible with atomistic molecular dynamics (MD) simulations. Here, we circumvent this problem by introducing a framework that combines the general thermodynamic principles of self-assembly and interfacial adsorption with atomistic MD simulations. This approach provides a full thermodynamic description based on equal chemical potentials and connects the surfactant bulk concentration, the experimental control parameter, with the surfactant surface density, the suitable control parameter in MD simulations. Self-consistency is demonstrated for the nonionic surfactant C12EO6 (hexaethylene glycol monododecyl ether) at an alkane/water interface, for which the adsorption and pressure isotherms are computed. The agreement between the simulation results and experiments is semiquantitative. A detailed analysis reveals that the used atomistic model captures well the interactions between surfactants at the interface but less so their adsorption affinities to the interface and incorporation into micelles. Based on a comparison with other recent studies that pursued similar modeling challenges, we conclude that the current atomistic models systematically overestimate the surfactant affinities to aggregates, which calls for improved models in the future.
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Affiliation(s)
- Matej Kanduč
- Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Cosima Stubenrauch
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Reinhard Miller
- Department of Physics, Technische Universität Darmstadt, Hochschulstrasse 8, 64289 Darmstadt, Germany
| | - Emanuel Schneck
- Department of Physics, Technische Universität Darmstadt, Hochschulstrasse 8, 64289 Darmstadt, Germany
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2
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Chakrabarti C, Mevada C, Ray D, Aswal VK, Pillai SA. Influence of sodium salts on the phase and gelation behaviour of T1107 to be used as proposed polymer gel electrolyte. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Machhi HK, Ray D, Panjabi SH, Aswal VK, Soni SS. Effect of redox active multivalent metal salts on micellization of amphiphilic block copolymer for energy storage devices via SANS, DLS and NMR. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116904] [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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4
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Prameela GKS, Phani Kumar BVN, Subramanian J, Tsuchiya K, Pan A, Aswal VK, Abe M, Mandal AB, Moulik SP. Interaction between sodium dodecylsulfate (SDS) and pluronic L61 in aqueous medium: assessment of the nature and morphology of the formed mixed aggregates by NMR, EPR, SANS and FF-TEM measurements. Phys Chem Chem Phys 2021; 23:13170-13180. [PMID: 34079976 DOI: 10.1039/d0cp06227h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interaction of copolymer L61 i.e., (EO)2(PO)32(EO)2 (where EO and PO are ethylene and propylene oxides, respectively) with surfactant SDS (sodium dodecylsulfate) in relation to their self-aggregation, dynamics and microstructures has been physicochemically studied in detail employing the Nuclear Magnetic Resonance (NMR), Electron Paramagnetic Resonance (EPR), Small-Angle Neutron Scattering (SANS), and Freeze-Fracture Transmission Electron Microscopy (FF-TEM) methods. The NMR self-diffusion study indicated a synergistic interaction between SDS and L61 forming L61-SDS mixed complex aggregates, and deuterium (2H) NMR pointed out the nonspherical nature of these aggregates with increasing [L61]. EPR spectral analysis of the motional parameters of 5-doxyl steraric acid (5-DSA) as a spin probe provided information on the microviscosity of the local environment of the L61-SDS complex aggregates. SANS probed the geometrical aspects of the SDS-L61 assemblies as a function of both [L61] and [SDS]. Progressive evolution of the mixed-aggregate geometries from globular to prolate ellipsoids with axial ratios ranging from 2 to 10 with increasing [L61] was found. Such morphological changes were further corroborated with the results of 2H NMR and FF-TEM measurements. The strategy of the measurements, and data analysis for a concerted conclusion have been presented.
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Affiliation(s)
- G K S Prameela
- Inorganic & Physical Chemistry Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai-600020, India.
| | - B V N Phani Kumar
- NMR, CATERS, CSIR - Central Leather Research Institute, Adyar, Chennai-600020, India
| | - J Subramanian
- Inorganic & Physical Chemistry Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai-600020, India.
| | - K Tsuchiya
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - A Pan
- Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata 700032, India.
| | - V K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
| | - M Abe
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - A B Mandal
- Inorganic & Physical Chemistry Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai-600020, India.
| | - S P Moulik
- Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata 700032, India.
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5
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Koziol MF, Fischer K, Seiffert S. Structural and Gelation Characteristics of Metallo-Supramolecular Polymer Model-Network Hydrogels Probed by Static and Dynamic Light Scattering. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00036] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martha Franziska Koziol
- Department of Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Karl Fischer
- Department of Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Sebastian Seiffert
- Department of Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
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6
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Wu W, Zou Z, Yang S, Wu Q, Li W, Ding Q, Guan Z, Zhu W. Coarse-Grained Molecular Dynamic and Experimental Studies on Self-Assembly Behavior of Nonionic F127/HS15 Mixed Micellar Systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2082-2092. [PMID: 32088962 DOI: 10.1021/acs.langmuir.9b03936] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The self-assembly of a nonionic triblock copolymer (F127) and a nonionic surfactant (HS15) has been investigated due to favorable changes in properties in their mixtures. The effect of the mixing ratio on the self-assembly process and on the structural stability of the mixtures was studied by coarse-grained molecular dynamic simulation (CGMD) and experimental measurements (transmission electron microscopy, dynamic light scattering measurement, drug loading stability analysis, and fluorescence spectroscopy measurement). The CGMD provided the information on self-assembly behavior. The microstructure and micellar stability are affected by different proportions of F127/HS15. Pure HS15 molecules (system I) can rapidly form stable aggregates driven by strong hydrophobic force, including two steps: the formation of seed clusters and the fusion of them. At low F127 ratio (system II), the self-assembly process is dynamic unstable, and a volatile "coil/cluster-like" aggregate is formed under the single "binding" effect. As the ratio of added F127 increase, such as system III, stable "lotus-seedpod-like" aggregates form under the double effects of "binding plus wrapping". Its dynamic equilibrium can be achieved rapidly. The experimental results approved the assumption of "different mixing ratio with different structural stability" and even different loading stability of F127/HS15 systems for drugs with different log P, such as PUE and DTX, which means different loading area for them in the micellar systems at different mixing ratios because of less hydrophobic microdomains with the increase of F127 molecules.
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Affiliation(s)
- Wenting Wu
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Zhao Zou
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Songhong Yang
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Qiongzhu Wu
- College of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Wendong Li
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Quan Ding
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Zhiyu Guan
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Weifeng Zhu
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
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7
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Ćirin D, Krstonošić V. Influence of Poloxamer 407 on Surface Properties of Aqueous Solutions of Polysorbate Surfactants. J SURFACTANTS DETERG 2020. [DOI: 10.1002/jsde.12392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dejan Ćirin
- University of Novi SadFaculty of Medicine, Department of Pharmacy Hajduk Veljkova 3, 21000 Novi Sad Serbia
| | - Veljko Krstonošić
- University of Novi SadFaculty of Medicine, Department of Pharmacy Hajduk Veljkova 3, 21000 Novi Sad Serbia
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8
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Marcos X, Padilla-Beltrán C, Bernad-Bernad MJ, Rosales-Hernández MC, Pérez-Casas S, Correa-Basurto J. Controlled release of N-(2-hydroxyphenyl)-2-propylpentanamide nanoencapsulated in polymeric micelles of P123 and F127 tested as anti-proliferative agents in MDA-MB-231 cells. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2018.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Wei D, Ge L, Guo R. Effect of hydrophilically modified ibuprofen on thermoresponsive gelation of pluronic copolymer. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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10
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Ćirin D, Krstonošić V, Poša M. Properties of poloxamer 407 and polysorbate mixed micelles: Influence of polysorbate hydrophobic chain. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2016.11.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Evaluation of the antibacterial activity of a cationic polymer in aqueous solution with a convenient electrochemical method. Anal Bioanal Chem 2016; 409:1627-1633. [DOI: 10.1007/s00216-016-0105-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 11/08/2016] [Accepted: 11/16/2016] [Indexed: 10/20/2022]
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12
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Bayati S, Galantini L, Knudsen KD, Schillén K. Complexes of PEO-PPO-PEO triblock copolymer P123 and bile salt sodium glycodeoxycholate in aqueous solution: A small angle X-ray and neutron scattering investigation. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.05.096] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Cai X, Liu M, Zhang C, Sun D, Zhai G. pH-responsive copolymers based on pluronic P123-poly(β-amino ester): Synthesis, characterization and application of copolymer micelles. Colloids Surf B Biointerfaces 2016; 142:114-122. [DOI: 10.1016/j.colsurfb.2016.02.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 01/12/2016] [Accepted: 02/15/2016] [Indexed: 02/09/2023]
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14
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Bayati S, Anderberg Haglund C, Pavel NV, Galantini L, Schillén K. Interaction between bile salt sodium glycodeoxycholate and PEO–PPO–PEO triblock copolymers in aqueous solution. RSC Adv 2016. [DOI: 10.1039/c6ra12514j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bile salts can associate to PEO–PPO–PEO block copolymer micelles and disintegrate them depending on the relative block length and molecular weight of the copolymers and bile salt/copolymer molar ratio.
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Affiliation(s)
- S. Bayati
- Division of Physical Chemistry
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
| | - C. Anderberg Haglund
- Division of Physical Chemistry
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
| | - N. V. Pavel
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
| | - L. Galantini
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
| | - K. Schillén
- Division of Physical Chemistry
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
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15
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Bayati S, Galantini L, Knudsen KD, Schillén K. Effects of Bile Salt Sodium Glycodeoxycholate on the Self-Assembly of PEO-PPO-PEO Triblock Copolymer P123 in Aqueous Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:13519-13527. [PMID: 26616587 DOI: 10.1021/acs.langmuir.5b03828] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A comprehensive experimental study on the interaction between the PEO-PPO-PEO block copolymer P123 (EO20PO68EO20) and the anionic bile salt sodium glycodeoxycholate (NaGDC) in water has been performed. The work was aimed at investigating the suitability of using P123 as bile salt sequestrant beside the fundamental aspects of PEO-PPO-PEO block copolymer-bile salt interactions. Various experimental techniques including dynamic and static light scattering, small-angle X-ray scattering, and differential scanning calorimetry (DSC) were employed in combination with electrophoretic mobility measurements. The system was investigated at a constant P123 concentration of 1.74 mM and with varying bile salt concentrations up to approximately 250 mM NaGDC (or a molar ratio n(NaGDC)/n(P123) = 144). In the mixed P123-NaGDC solutions, the endothermic process related to the self-assembly of P123 was observed to gradually decrease in enthalpy and shift to higher temperatures upon progressive addition of NaGDC. To explain this effect, the formation of NaGDC micelles carrying partly dehydrated P123 unimers was proposed and translated into a stoichiometric model, which was able to fit the experimental DSC data. In the mixtures at low molar ratios, NaGDC monomers associated with the P123 micelle forming a charged "P123 micelle-NaGDC" complex with a dehydrated PPO core. These complexes disintegrated upon increasing NaGDC concentration to form small "NaGDC-P123" complexes visualized as bile salt micelles including one or a few P123 copolymer chains.
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Affiliation(s)
- Solmaz Bayati
- 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. le A. Moro 5, 00185 Rome, Italy
| | - Kenneth D Knudsen
- Institute for Energy Technology, P.O. Box 40, NO-2027 Kjeller, Norway
| | - Karin Schillén
- Division of Physical Chemistry, Department of Chemistry, Lund University , P.O. Box 124, SE-221 00 Lund, Sweden
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16
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Wang H, Li X, Xiong C, Gao S, Wang J, Kong Y. One-Pot Synthesis of Iron-Containing Nanoreactors with Controllable Catalytic Activity Based on Multichannel Mesoporous Silica. ChemCatChem 2015. [DOI: 10.1002/cctc.201500868] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Haiqing Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Chemistry and Chemical Engineering; Nanjing Tech University; Nanjing 210009 P.R. China
| | - Xiaoming Li
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Chemistry and Chemical Engineering; Nanjing Tech University; Nanjing 210009 P.R. China
| | - Cuirong Xiong
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Chemistry and Chemical Engineering; Nanjing Tech University; Nanjing 210009 P.R. China
| | - Shuying Gao
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Chemistry and Chemical Engineering; Nanjing Tech University; Nanjing 210009 P.R. China
| | - Jun Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Chemistry and Chemical Engineering; Nanjing Tech University; Nanjing 210009 P.R. China
| | - Yan Kong
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Chemistry and Chemical Engineering; Nanjing Tech University; Nanjing 210009 P.R. China
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17
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Goswami A, Hassan P, Bhagwat SS. Static and dynamic surface tension behaviour of a triblock copolymer and a non ionic surfactant mixture. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.07.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Wang H, Xiong C, Li Z, Kong Y, Chen J, Wang J. Three-Dimensionally Controllable Synthesis of Multichannel Silica Nanotubes and Their Application as Dual Drug Carriers. Chempluschem 2015; 80:1615-1623. [PMID: 31973377 DOI: 10.1002/cplu.201500231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Revised: 08/24/2015] [Indexed: 11/05/2022]
Abstract
Three-dimensionally controllable multichannel silica nanotubes (MC-SNTs) have been constructed. Quaternary ammonium type (Cn H2n+1 (CH3 )3 N+ ) surfactants were used as structure-directing agents (SDAs) in basic ammonia. A low concentration of block copolymer HO(CH2 CH2 O)20 [CH2 CH(CH3 )O]70 (CH2 CH2 O)20 H (P123) was employed as an additive. The length, diameter, and pore size of MC-SNTs can be finely controlled in the range of 50 nm to 5 μm, 50 nm to 350 nm, and 2 nm to 3 nm by changing the molar ratio of P123 and SDA, the concentration of ammonia, and the length of carbon chain of SDAs, respectively. Observations based on transmission electron microscopy confirmed the role of P123 and ammonia in the self-assembly of micelles of SDA. Compared with the one-pot method reported previously, the aspect ratios (ARs; length/diameter) of obtained MC-SNTs were tunable in a wide range of approximately 1 to 100. The tunable MC-SNTs were used as dual drug-delivery carriers for anticancer drug doxorubicin (Dox) and anti-inflammatory drug ibuprofen (Ibu). Results of release behavior and toxicity to cancer cells of Dox-Ibu-loaded MC-SNTs with different ARs revealed that Dox and Ibu were successfully codelivered and did not interfere with each other. The produced MC-SNTs with larger AR values of showed advantages in the amount of accumulated dual drugs, the duration time of release, and inhibition of the growth of HeLa cells.
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Affiliation(s)
- Haiqing Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Cuirong Xiong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Zheng Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Yan Kong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Jin Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China.,Nanjing Medical University, Nanjing, 211166, P. R. China
| | - Jun Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
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19
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Molecular interactions between PEO–PPO–PEO and PPO–PEO–PPO triblock copolymers in aqueous solution. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.08.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Patel U, Dharaiya N, Parikh J, Aswal VK, Bahadur P. Effect of amphiphilic and non-amphiphilic polymers on micellar behaviour of nonionic surfactant Triton X-100. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.04.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Vekariya RL, Aswal VK, Hassan PA, Soni SS. Influence of N-alkylpyridinium halide based ionic liquids on micellization of P123 in aqueous solutions: a SANS, DLS, and NMR study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:14406-14415. [PMID: 25380316 DOI: 10.1021/la502902n] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The isotropic micellar state of Pluronic P123 in the presence and absence of N-alkylpyridinium halide ionic liquids (ILs) is investigated using SANS, DLS, and (1)H NMR studies. The micellar structural parameters are obtained as a function of variation in alkyl chain length, anions, and concentrations of ILs by fitting the SANS scattering data with a model composed of core-shell form factor and a hard sphere structure factor of interaction. Addition of ILs decreases the micellar core, aggregation number, and hard sphere radius of P123 micelles. From quantitative analysis, we determined the amount of solvent (D2O + IL) present inside the core and the core-shell interface along with cationic head groups. This is further supported by monitoring interaction between ILs and polymer micelle using (1)H NMR spectroscopy. The results are discussed and explained as a function of concentration of C8PyCl, alkyl chain length, and anions of N-alkylpyridinium halides.
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Affiliation(s)
- Rohit L Vekariya
- Department of Chemistry, Sardar Patel University , Vallabh Vidyanagar 388120, Gujarat, India
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22
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Zhang H, Zhao L, Chu L, Han X, Zhai G. Preparation, optimization, characterization and cytotoxicity in vitro of Baicalin-loaded mixed micelles. J Colloid Interface Sci 2014; 434:40-7. [PMID: 25168581 DOI: 10.1016/j.jcis.2014.07.045] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Revised: 07/29/2014] [Accepted: 07/30/2014] [Indexed: 11/17/2022]
Abstract
The aim of this study was to develop a Baicalin (BC)-loaded mixed micelle delivery system (BC-ST-P123-MMs) with sodium taurocholate (ST) and pluronic P123 block copolymer (P123) as carrier materials to improve the solubility of BC, a poorly soluble drug. In this study, the mixed micelle system was prepared using the method of thin-film dispersion and then optimized by the homogeneous design-response surface methodology with the entrapment efficiency and drug loading as indexes. The average size and the zeta potential of the BC-ST-P123-MMs were 15.60 nm and -5.26 mV, respectively. Drug loading (DL, 16.94%) and entrapment efficiency (EE, 90.67%) contributed to high solubility (10.20 mg/mL) of BC in water. The optimized BC-ST-P123-MMs appeared spherical with obvious core-shell structure and well dispersed without aggregation and adhesion under TEM. In addition, DSC result indicated that BC had been wrapped in BC-ST-P123-MMs and crystalline state of BC was changed. The release result in vitro showed that BC-ST-P123-MMs presented sustained release behavior compared to control group. The IC50 value of BC-ST-P123-MMs (46.18 μg/mL) was lower than that of BC solution (67.14 μg/mL) on Hep G2 cell lines. Cellular uptake tests illustrated that the ST-P123-MMs system as carrier could significantly enhance the uptake of drugs by tumor cells. The results demonstrated that the BC-loaded mixed micelles could improve solubility of BC and exhibited great potential for delivering drug into cancer cells.
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Affiliation(s)
- Haiqun Zhang
- Department of Pharmaceutics, College of Pharmacy, Shandong University, Jinan 250012, China
| | - Lili Zhao
- Department of Pharmaceutics, College of Pharmacy, Shandong University, Jinan 250012, China
| | - Lianjun Chu
- College of Medicine and Nursing, Dezhou University, Dezhou 253023, China
| | - Xu Han
- College of Chemistry, Shandong University, Jinan 250100, China
| | - Guangxi Zhai
- Department of Pharmaceutics, College of Pharmacy, Shandong University, Jinan 250012, China.
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23
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Janiak J, Tomšič M, Lundberg D, Olofsson G, Piculell L, Schillén K. Soluble Aggregates in Aqueous Solutions of Polyion–Surfactant Ion Complex Salts and a Nonionic Surfactant. J Phys Chem B 2014; 118:9745-56. [DOI: 10.1021/jp411701g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- John Janiak
- Division
of Physical Chemistry, Department of Chemistry, Center for Chemistry
and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Matija Tomšič
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva
5, SI-1000 Ljubljana, Slovenia
| | - Dan Lundberg
- Division
of Physical Chemistry, Department of Chemistry, Center for Chemistry
and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Gerd Olofsson
- Division
of Physical Chemistry, Department of Chemistry, Center for Chemistry
and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Lennart Piculell
- Division
of Physical Chemistry, Department of Chemistry, Center for Chemistry
and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Karin Schillén
- Division
of Physical Chemistry, Department of Chemistry, Center for Chemistry
and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
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24
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Singh V, Khullar P, Dave PN, Kaura A, Bakshi MS, Kaur G. pH and thermo-responsive tetronic micelles for the synthesis of gold nanoparticles: effect of physiochemical aspects of tetronics. Phys Chem Chem Phys 2014; 16:4728-39. [DOI: 10.1039/c3cp55079f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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25
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Elistratova J, Mikhailov M, Burilov V, Babaev V, Rizvanov I, Mustafina A, Abramov P, Sokolov M, Konovalov A, Fedin V. Supramolecular assemblies of triblock copolymers with hexanuclear molybdenum clusters for sensing antibiotics in aqueous solutions via energy transfer. RSC Adv 2014. [DOI: 10.1039/c4ra02457e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Water soluble hexanuclear molybdenum cluster assembled with triblock copolymer gives luminescent response on ion-pairing with difloxacin through energy transfer.
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Affiliation(s)
- Julia Elistratova
- A.E. Arbuzov Institute of Organic and Physical Chemistry
- Kazan, Russia
| | - Maxim Mikhailov
- Nikolaev Institute of Inorganic Chemistry
- Novosibirsk, Russia
| | | | - Vasily Babaev
- A.E. Arbuzov Institute of Organic and Physical Chemistry
- Kazan, Russia
| | - Ildar Rizvanov
- A.E. Arbuzov Institute of Organic and Physical Chemistry
- Kazan, Russia
| | - Asiya Mustafina
- A.E. Arbuzov Institute of Organic and Physical Chemistry
- Kazan, Russia
- Kazan Federal University
- Kazan, Russia
| | - Pavel Abramov
- Nikolaev Institute of Inorganic Chemistry
- Novosibirsk, Russia
- Novosibirsk State University
- Novosibirsk, Russia
| | - Maxim Sokolov
- Nikolaev Institute of Inorganic Chemistry
- Novosibirsk, Russia
- Novosibirsk State University
- Novosibirsk, Russia
| | | | - Vladimir Fedin
- Nikolaev Institute of Inorganic Chemistry
- Novosibirsk, Russia
- Novosibirsk State University
- Novosibirsk, Russia
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26
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Atta AM, Dyab AKF, Al-Lohedan HA. Surface Activity of Novel Polymerizable Anionic Polyoxyethylene 4-Nonyl-2-Prpylene-Phenyl Ether Ammonium Sulfate Succinate Surfactants. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.739942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Mixed Micellar and Interfacial Interactions of a Triblock Polymer (EO37PO56EO37) with a Series of Monomeric and Dimeric Surfactants. J SURFACTANTS DETERG 2013. [DOI: 10.1007/s11743-013-1516-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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Zhai Y, Guo S, Liu C, Yang C, Dou J, Li L, Zhai G. Preparation and in vitro evaluation of apigenin-loaded polymeric micelles. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.03.051] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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29
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Khullar P, Singh V, Mahal A, Kumar H, Kaur G, Bakshi MS. Block Copolymer Micelles as Nanoreactors for Self-Assembled Morphologies of Gold Nanoparticles. J Phys Chem B 2013; 117:3028-39. [DOI: 10.1021/jp310507m] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Poonam Khullar
- Department of
Chemistry, B.B.K. D.A.V. College for Women, Amritsar 143005, Punjab,
India
| | - Vijender Singh
- Department of
Chemistry, B.B.K. D.A.V. College for Women, Amritsar 143005, Punjab,
India
| | - Aabroo Mahal
- Department of
Chemistry, B.B.K. D.A.V. College for Women, Amritsar 143005, Punjab,
India
- Department of Chemistry, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar-144011, India
| | - Harsh Kumar
- Department of Chemistry, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar-144011, India
| | - Gurinder Kaur
- Nanotechnology Research Laboratory, College of North Atlantic, Labrador City, NL A2 V
2K7 Canada
| | - Mandeep Singh Bakshi
- Department of Chemistry, Wilfrid Laurier University, Science Building, 75 University
Ave. W., Waterloo ON N2L 3C5, Canada
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30
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Bhattacharjee J, Verma G, Aswal VK, Patravale V, Hassan PA. Microstructure, drug binding and cytotoxicity of Pluronic P123–aerosol OT mixed micelles. RSC Adv 2013. [DOI: 10.1039/c3ra44983a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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31
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Yaremko ZM, Burka OA, Fedushinskaya LB, Soltys MN. Intermolecular interactions of polymethacrylic acid with nonylphenoxypoly(ethoxy)ethanol in water solutions. RUSS J GEN CHEM+ 2012. [DOI: 10.1134/s1070363212090174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Mahajan RK, Nandni D. Micellization and Phase Behavior of Binary Mixtures of Anionic and Nonionic Surfactants in Aqueous Media. Ind Eng Chem Res 2012. [DOI: 10.1021/ie202463w] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | - Durgesh Nandni
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143 005, India
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33
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Yaremko ZM, Burka OA, Fedushinskaya LB, Soltys MN. Intermolecular interactions of polymethacrylic acid with N-alkyl-1,3-propanediamine. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2012. [DOI: 10.1134/s003602441202032x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Nambam JS, Philip J. Effects of Interaction of Ionic and Nonionic Surfactants on Self-Assembly of PEO–PPO–PEO Triblock Copolymer in Aqueous Solution. J Phys Chem B 2012; 116:1499-507. [DOI: 10.1021/jp208902a] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. S. Nambam
- SMARTS, NDED, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam
603 102, Tamilnadu, India
| | - John Philip
- SMARTS, NDED, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam
603 102, Tamilnadu, India
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35
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Liu J, Sun D, Wei X, Wang S, Yu L, Zheng L. Interaction Between 1-Dodecyl-3-Methylimidazolium Bromide and Sodium Carboxymethylcellulose in Aqueous Solution: Effect of Polymer Concentration. J DISPER SCI TECHNOL 2012. [DOI: 10.1080/01932691.2010.528675] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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36
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Sakai T, Kurosawa H, Okada T, Mishima S. Vesicle formation in mixture of a PEO-PPO-PEO block copolymer (Pluronic P123) and a nonionic surfactant (Span 65) in water. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.08.046] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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37
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Microstructure and mixing behavior of benzalkonium chloride with triblock polymers in aqueous medium. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.05.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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38
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Filippov SK, Starovoytova L, Konák C, Hrubý M, Macková H, Karlsson G, Stepánek P. pH sensitive polymer nanoparticles: effect of hydrophobicity on self-assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:14450-14457. [PMID: 20795676 DOI: 10.1021/la1018778] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The influence of hydrophobicity on formation, stability, and size of pH-responsive methacryloylated oligopeptide-based polymer nanoparticles has been studied by dynamic light scattering (DLS), transmission electron microscopy (Cryo-TEM), and NMR. Different polyanions/surfactant systems have been studied at constant polymer concentration and within a broad range of surfactant concentrations. The two newly synthesized pH-sensitive hydrophobic polyanions, poly(N(ω)-methacryloyl glycyl-L-leucine) and poly(N(ω)-methacryloyl glycyl-L-phenylalanyl-L-leucinyl-glycine), and three nonionic surfactants (Brij97, Brij98, and Brij700) have been investigated. The surfactants were different in the length of hydrophilic poly(ethylene oxide) (PEO) chain. In surfactant-free solution at basic pH, the polyanions form hydrophobic domains. In the presence of a surfactant, our results prove the complex formation at high pH between the nonionic surfactant and the polyelectrolyte; a pearl-necklace structure is formed. At low pH below critical pH (pH(tr)), reversible nanoscale structures occur in solutions for all systems. The detailed mechanism of the formation of pH-sensitive nanoparticles from polymer-surfactant complex with varying pH is established. Our results suggest that the polymer hydrophobicity is of primary importance in pretransitional behavior of the complex. Once preliminary nanoparticle nuclei are formed, the hydrophobicity of the polymer plays a minor role on further behavior of formed nanostructures. The subsequent transformation of nanoparticles is determined by the surfactant hydrophilicity, the length of hydrophilic tail that prevents further aggregation due to steric repulsions.
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Affiliation(s)
- Sergey K Filippov
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic.
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39
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Wygnal E, MacNeil JA, Bowles J, Leaist DG. Mutual diffusion with equal eigenvalues in solutions of strongly associated surfactants. A new kind of multicomponent diffusion. J Mol Liq 2010. [DOI: 10.1016/j.molliq.2010.03.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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40
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Dong R, Hao J. Complex Fluids of Poly(oxyethylene) Monoalkyl Ether Nonionic Surfactants. Chem Rev 2010; 110:4978-5022. [DOI: 10.1021/cr9003743] [Citation(s) in RCA: 174] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Renhao Dong
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China
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41
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Kadam Y, Bharatiya B, Hassan P, Verma G, Aswal V, Bahadur P. Effect of an amphiphilic diol (Surfynol®) on the micellar characteristics of PEO–PPO–PEO block copolymers in aqueous solutions. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.04.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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42
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Salt effect on the complex formation between 1-dodecyl-3-methylimidazolium bromide and sodium carboxymethylcellulose in aqueous solution. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.01.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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43
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Block Copolymer Surfactant Mixtures in Aqueous Solution: Can we Achieve Size and Shape Control by Co-Micellization? ADVANCES IN POLYMER SCIENCE 2010. [DOI: 10.1007/12_2010_66] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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44
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Liang D, Wang Y, Ma JH, Liu JH, Chen SW, Li RF. Synthesis and characterization of SBA-15 macrospheres with hierarchical pore structure. CHINESE CHEM LETT 2009. [DOI: 10.1016/j.cclet.2009.07.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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45
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Denkova PS, Van Lokeren L, Willem R. Mixed micelles of Triton X-100, sodium dodecyl dioxyethylene sulfate, and synperonic l61 investigated by NOESY and diffusion ordered NMR spectroscopy. J Phys Chem B 2009; 113:6703-9. [PMID: 19385612 DOI: 10.1021/jp8104369] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mixed micelles formed from nonionic surfactant Triton X-100 (TX100), anionic surfactant sodium dodecyl dioxyethylene sulfate (SDP2S), and triblock copolymer Synperonic L61 (SL61) were investigated by 1H NMR spectroscopy. The size and shape of the aggregates were determined by diffusion ordered NMR spectroscopy (DOSY), while 2D nuclear Overhauser enhanced spectroscopy (NOESY) NMR was used to study the mutual spatial arrangement of the surfactant molecules in the aggregated state. An average micellar hydrodynamic radius of 3.6 nm, slightly increasing upon increasing TX100 molar fraction, was found for the mixed systems without additives. Addition of SL61 to the mixed micellar systems results in a slight increase of micellar radii. In the presence of AlCl3, an increase of TX100/SDP2S micellar sizes from 4 to 10 nm was found when increasing the SDP2S molar fraction. The mixed TX100/SDP2S micelles in the presence of both AlCl3 and polymer SL61 are almost spherical, with a radius of 4.5 nm. 2D NOESY data reveal that, as the individual TX100 micelles, mixed TX100/SDP2S and TX100/SDP2S/SL61/AlCl3 micelles also have a multilayer structure, with partially overlapping internal and external layers of TX100 molecules. In these mixed micelles, the SDP2S molecules are located at the level of the external layer of TX100 molecules, whereas the SL61 polymer is partially incorporated inside of the micellar core.
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Affiliation(s)
- Pavletta S Denkova
- Vrije Universiteit Brussel, High Resolution NMR Centre (HNMR), Department of Materials and Chemistry (MACH), Pleinlaan 2, B-1050 Brussels, Belgium.
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46
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Löf D, Tomsic M, Glatter O, Fritz-Popovski G, Schillén K. Structural characterization of nonionic mixed micelles formed by C12EO6 surfactant and P123 triblock copolymer. J Phys Chem B 2009; 113:5478-86. [PMID: 19368410 DOI: 10.1021/jp808442d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A structural characterization of mixed micelles formed in aqueous solution by the PEO-PPO-PEO triblock copolymer P123 and the nonionic surfactant C(12)EO(6) was carried out using various techniques, including ultralow shear viscosimetry, depolarized dynamic light scattering (VH-DLS), depolarized static light scattering (VH-SLS), and small-angle X-ray scattering (SAXS). The sphere-to-rod transition of the mixed micelles was studied in a diluted regime (P123 concentrations ranging from 0.5 to 10 wt %) at C(12)EO(6)/P123 molar ratios of 2.2, 3.2, 6.0, and 11 as well as for the pure C(12)EO(6). The data from VH-SLS and viscosimetry displayed a sharp increase in the intensity and viscosity, respectively, at the sphere-to-rod transition, and the results from the two methods were in accordance. In both techniques, an increased transition temperature with increasing content of C(12)EO(6) (in the molar ratio regime from 2.2 to 11) was observed. SAXS was used as the main technique, and a thorough structural characterization was performed, where indirect Fourier transformation (IFT) and generalized indirect Fourier transformation (GIFT) were employed in the analysis procedure of the SAXS data. The p(r) functions obtained from the IFT (employed at low P123 concentrations, i.e., 1.0 and 2.0 wt %) and GIFT (employed above 2.0 wt %) analyses revealed increased inhomogeneities in the mixed micelles when the molar ratio was increased. This suggested that the C(12)EO(6) organized themselves at the interface between the PPO core and the PEO corona of the P123 micelles, with the C(12) alkyl chain stretching into the hydrophobic core and the EO(6) part residing in the hydrophilic corona. The structure factor parameters obtained with GIFT for a molar ratio of 2.2 at a P123 concentration of 5.0 wt % showed radius values smaller than what was estimated from the p(r) functions. This was explained by an interpenetration of the PEO chains from one mixed micelle into a neighboring one. VH-DLS was performed on the mixed micelles at a temperature 3 degrees C above the transition temperature and at a molar ratio of 2.2. From the analyzed data, the average length L of the rods was estimated to be 102 nm.
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Affiliation(s)
- David Löf
- Division of Physical Chemistry, Center for Chemistry and Chemical Engineering, P.O. Box 124, Lund University, SE-22100 Lund, Sweden
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47
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Burrows HD, Tapia MJ, Fonseca SM, Pradhan S, Scherf U, Silva CL, Pais AACC, Valente AJM, Schillén K, Alfredsson V, Carnerup AM, Tomsic M, Jamnik A. Solubilization of poly{1,4-phenylene-[9,9-bis(4-phenoxy-butylsulfonate)]fluorene-2,7-diyl} in water by nonionic amphiphiles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:5545-5556. [PMID: 19379013 DOI: 10.1021/la8042044] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In the presence of the nonionic alkyloxyethylene surfactant n-dodecylpentaoxyethylene glycol ether (C12E5), the anionic conjugated polyelectrolyte (CPE) poly{1,4-phenylene-[9,9-bis(4-phenoxy-butylsulfonate)]fluorene-2,7-diyl} (PBS-PFP) dissolves in water, leading to a blue shift in fluorescence and dramatic increases in fluorescence quantum yields above the surfactant critical micelle concentration (cmc). No significant changes were seen with a poly(ethylene oxide) of similar size to the surfactant headgroup, confirming that specific surfactant-polyelectrolyte interactions are important. From UV-visible and fluorescence spectroscopy, dynamic light scattering (DLS), small-angle X-ray scattering (SAXS), cryogenic transmission electron microscopy (cryo-TEM), and electrical conductivity, together with our published NMR and small-angle neutron scattering (SANS) results, we provide a coherent model for this behavior in terms of breakup of PBS-PFP clusters through polymer-surfactant association leading to cylindrical aggregates containing isolated polymer chains. This is supported by molecular dynamics simulations, which indicate stable polymer-surfactant structures and also provide indications of the tendency of C12E5 to break up polymer clusters to form these mixed polymer-surfactant aggregates. Radial electron density profiles of the cylindrical cross section obtained from SAXS results reveal the internal structure of such inhomogeneous species. DLS and cryo-TEM results show that at higher surfactant concentrations the micelles start to grow, possibly partially due to formation of long, threadlike species. Other alkyloxyethylene surfactants, together with poly(propylene glycol) and hydrophobically modified poly(ethylene glycol), also solubilize this polymer in water, and it is suggested that this results from a balance between electrostatic (or ion-dipole), hydrophilic, and hydrophobic interactions. There is a small, but significant, dependence of the emission maximum on the local environment.
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Affiliation(s)
- Hugh D Burrows
- Departamento de Química, and Faculdáde de Farmácia, Universidade de Coimbra, 3004-535 Coimbra, Portugal.
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48
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Costa T, Schillén K, Miguel MDG, Lindman B, Seixas de Melo J. Association of a hydrophobically modified polyelectrolyte and a block copolymer followed by fluorescence techniques. J Phys Chem B 2009; 113:6194-204. [PMID: 19354273 DOI: 10.1021/jp8093879] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
By using absorption and fluorescence (steady-state and time-resolved) techniques, the interaction between a poly(acrylic acid) (PAA), randomly grafted with pyrene (Py) units (PAAMePy55), and a triblock copolymer of poly(ethylene oxide) and poly(propylene oxide) (EO(20)PO(68)EO(20), P123) was investigated. From the fluorescence data, it is shown that upon addition of P123 a decrease of the (pyrene-pyrene, Py-Py) intramolecular association, i.e., a decrease of dynamic and static excimer formation, is observed. Time-resolved fluorescence data reveal the existence of two types of monomers (monomers that are able to form excimer, MAGRE, and isolated monomers) and two excimers. Addition of P123 causes also an increase of the amount of isolated Py monomers. The overall fluorescence data suggest that the PAAMePy55 and the P123 block copolymer associate strongly at low pH, leading to the formation of P123 micelles surrounded by one PAAMePy55 chain, where the pyrene groups are located at the PPO/PEO interface of the P123 micelles. Steady-state fluorescence results also showed that an excess of P123 micelles in solution is required for the association to occur. At high pH (pH 9 and above) the situation is less clear. The steady-state (particularly in the I(1)/I(3) ratio) and time-resolved fluorescence results indicate a contact between the pyrene groups and PEO, which then would imply that there may be an interaction, but much weaker than at low pH.
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Affiliation(s)
- Telma Costa
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
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49
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Costa T, Seixas de Melo J, Miguel MDG, Lindman B, Schillén K. Complex Formation between a Fluorescently-Labeled Polyelectrolyte and a Triblock Copolymer. J Phys Chem B 2009; 113:6205-14. [DOI: 10.1021/jp8093885] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Telma Costa
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Division of Physical Chemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
| | - J. Seixas de Melo
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Division of Physical Chemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
| | - Maria da G. Miguel
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Division of Physical Chemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
| | - Björn Lindman
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Division of Physical Chemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
| | - Karin Schillén
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Division of Physical Chemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
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50
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López-Esparza R, Guedeau-Boudeville M, Larios-Rodríguez E, Maldonado A, Ober R, Urbach W. Confinement of a hydrophilic polymer in membrane lyotropic phases. J Colloid Interface Sci 2009; 331:185-90. [DOI: 10.1016/j.jcis.2008.11.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2008] [Revised: 11/08/2008] [Accepted: 11/11/2008] [Indexed: 11/15/2022]
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