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Morita T, Torii Y, Imamura H, Kadota T, Sakuma F, Higashi K, Sumi T. Pair Potential between Poloxamer 407 Micelles in 14 wt % Aqueous Solution Clarifying the Sol-Gel-Sol Transition by Temperature Rise. J Phys Chem Lett 2024:7909-7915. [PMID: 39066786 DOI: 10.1021/acs.jpclett.4c01138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Poloxamer 407 (P407) is used as a safety-guaranteed, invaluable pharmaceutical nanocarrier. The aqueous solution of P407 exhibits sol-to-gel and gel-to-sol transitions, specifically during a temperature rise. Here, we develop a method to determine the pair potential between colloidal particles based primarily on experimental small-angle scattering data. Using this approach, the pair potential between the P407 micelles in the sol-gel-sol transition state is revealed without prelimiting any type of interaction forces. The results indicate that the increase in the attractive interaction contributes to enhancing the volume fraction, which is the decisive parameter for the gelation in terms of the Alder transition theory, i.e., the fluid-to-crystal phase transition of the hard-sphere model in the micelle system. This study demonstrates that one of the key mechanisms of the gel-to-sol transition upon heating is the enhancement of the structural fluctuation due to widening of the potential well in the intermicellar pair potential.
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Affiliation(s)
- Takeshi Morita
- Graduate School of Science, Chiba University, Chiba 263-8522, Japan
| | - Yusuke Torii
- Graduate School of Science, Chiba University, Chiba 263-8522, Japan
| | - Hiroshi Imamura
- Department of Biological Data Science, Nagahama Institute of Bio-Science and Technology, Nagahama 526-0829, Shiga, Japan
| | - Teruki Kadota
- Graduate School of Science, Chiba University, Chiba 263-8522, Japan
| | - Fumie Sakuma
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Kenjirou Higashi
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
| | - Tomonari Sumi
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
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2
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Ganguly R, Kumar S, Soumya M, Khare A, Bhainsa KC, Aswal VK, Kohlbrecher J. Structural and therapeutic properties of salicylic acid-solubilized Pluronic solutions and hydrogels. SOFT MATTER 2024; 20:2075-2087. [PMID: 38345756 DOI: 10.1039/d4sm00079j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Salicylic acid (SA) finds extensive applications in the treatment of rheumatic and skin diseases because of its analgesic, anti-inflammatory and exfoliating properties. As it is lipophilic in nature, there is a need for appropriate delivery systems to harness these properties for different applications. Herein, we examined the suitability of Pluronic P123/F127 micellar systems as delivery media by investigating the structural, flow and antimicrobial properties of P123/F127-SA solutions and hydrogels using DLS, SANS, rheological and zone inhibition measurement techniques. SA modulates the aggregation characteristics of these surfactant systems and brings about spherical-to-worm-like micelle-to-vesicular structural transitions in the hydrophobic Pluronic P123 system, a spherical-to-worm-like micellar transition in the mixed P123/F127 system and an onset of inter-micellar attraction in the hydrophilic Pluronic F127 system. SA-solubilized systems of both hydrophobic and hydrophilic Pluronics inhibit the growth of Gram-positive and Gram-negative bacteria with comparable MIC values. This suggests that the interaction of SA molecules with the bacterial cell membrane remains unobstructed upon encapsulation in Pluronic micelles. F127 hydrogel-based SA formulations with rheological properties suitable for topical applications and up to 15% SA loading were prepared. These will be useful SA ointments as F127 is an FDA-approved excipient for topical drug delivery applications. The results indicate that Pluronics remain effective as delivery agents for SA and exhibit interesting structural polymorphism upon its solubilization.
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Affiliation(s)
- R Ganguly
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India.
| | - S Kumar
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - M Soumya
- Nuclear Agriculture & Biotech Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - A Khare
- Radiation Biology & Health Sciences Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - K C Bhainsa
- Nuclear Agriculture & Biotech Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - V K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India
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3
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Balan GA, Precupas A, Matei I. Gelation Behaviour of Pluronic F127/Polysaccharide Systems Revealed via Thioflavin T Fluorescence. Gels 2023; 9:939. [PMID: 38131925 PMCID: PMC10742936 DOI: 10.3390/gels9120939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023] Open
Abstract
Fast, reliable methods for characterizing the micelle-to-gel transition in emerging Pluronic F127/polysaccharide materials are essential for tailoring their applications as in situ gelling delivery systems. This study describes a simple fluorimetric method based on the response to gelation of the molecular probe thioflavin T (ThT). The techniques employed are (second derivative) steady-state and synchronous fluorescence. The capabilities of ThT as gelation reporter are tested for three model systems: Pluronic F127 (P16.6%), Pluronic F127/alginate (P16.6%ALG2%) and Pluronic F127/hyaluronic acid (P16.6%HA0.5%). We demonstrate that the changes in the short and long wavelength emissions of ThT allow accurate determination of the critical gelation temperatures in the investigated systems. The spectroscopic data providing information at molecular level are complemented with differential scanning microcalorimetric results revealing additional macroscopic insight into the micellization process. The gelation study is preceded by a solvatochromic analysis of ThT.
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Affiliation(s)
| | | | - Iulia Matei
- “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
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4
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Pal T, Sahu K. Effect of salt addition on a triblock copolymer-zwitterionic surfactant assembly: insight from excited-state proton transfer. Phys Chem Chem Phys 2023; 25:29816-29830. [PMID: 37886857 DOI: 10.1039/d3cp03388k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Copolymer-surfactant assemblies are frequently utilized across various fields, from medicine to nanotechnology. Understanding the organization of the mixed assemblies in a saline environment will further expand their application horizons, especially under physiological conditions. Excited-state proton transfer (ESPT) can provide insight into the hydration nature and organization of the non-toxic assembly of a triblock copolymer F127 (poly-(ethylene oxide)101 (PEO101)-poly(propylene oxide)56 (PPO56)-PEO101)) and a zwitterionic sulfobetaine surfactant N-dodecyl-N,N-dimethyl-3-ammoniopropane sulfonate (SB12). Here, we present a comprehensive investigation of the compactness and hydration nature of the F127-SB12 mixed assemblies at different salt concentrations using the ESPT of 8-hydroxy pyrene-1,3,6-trisulfonate (HPTS). In the absence of salts, gradual SB12 addition to a premicellar (0.4 mM) or a post-micellar (4 mM) F127 solution leads to an anomalous modulation of the protonated and deprotonated emission bands. The emission intensity ratio (protonated/deprotonated) first increases to a maximum at a particular SB12 concentration (6 mM and 35 mM for the premicellar and post-micellar F127 assemblies, respectively), and then the ratio decreases with a further increase in the surfactant concentration. Since the intensity ratio is an indicator of the retardation of the ESPT process, the mixed micellar configuration displaying a maximum intensity ratio represents the most compact and least hydrated state. Salt addition to this configuration lowers the intensity ratio, signifying an enhanced ESPT process. Dynamic light scattering (DLS) results indicate that the size of the mixed assembly remains almost unaltered with the addition of salts. Thus, salinity enhances the ESPT process inside the F127-SB12 mixed assemblies without significantly altering the hydrodynamic radius.
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Affiliation(s)
- Tapas Pal
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Kalyanasis Sahu
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
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Lupu A, Gradinaru LM, Rusu D, Bercea M. Self-Healing of Pluronic® F127 Hydrogels in the Presence of Various Polysaccharides. Gels 2023; 9:719. [PMID: 37754400 PMCID: PMC10528848 DOI: 10.3390/gels9090719] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/28/2023] Open
Abstract
Thermoresponsive Pluronic® F127 (PL) gels in water were investigated through rheological tests in different shear conditions. The gel strength was tuned with the addition of 1% polysaccharide solution. In the presence of xanthan gum (XG), the viscoelastic behavior of PL-based hydrogels was improved in aqueous environment, but the rheological behavior was less changed with the addition of XG in PBS solutions, whereas in the presence of 0.1 M NaCl, the viscoelastic parameters decreased. PL micellar networks exhibited a self-healing ability, recovering their initial structure after applying cycles of high strain. The rheological characteristics of the PL hydrogel changed with the addition of 1% polysaccharides (xanthan gum, alginate, κ-carrageenan, gellan, or chitosan). PL/polysaccharide systems form temperature-responsive hydrogels with shear thinning behavior, yield stress, and self-healing ability, being considered a versatile platform for injectable biomaterials or bioinks. Thus, in the presence of xanthan gum in aqueous medium, the gel strength was improved after applying a high strain (the values of elastic modulus increased). The other investigated natural polymers induced specific self-healing behaviors. Good performances were observed with the addition of gellan gum, alginate, and κ-carrageenan, but for high values of strain, the ability to recover the initial structure decreased. A modest self-healing behavior was observed in the presence of chitosan and xanthan gum dissolved in NaCl solution.
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Affiliation(s)
- Alexandra Lupu
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (L.M.G.); (D.R.)
| | | | | | - Maria Bercea
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (L.M.G.); (D.R.)
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6
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Basu M, Hassan P. Influence of temperature and organic acid on self-assembly behavior of Pluronic F127. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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7
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Zhou T, Jiang X. Modulating luminescence and assembled shapes of ultrasmall Au nanoparticles towards hierarchical information encryption. Chem Sci 2022; 13:12107-12113. [PMID: 36349114 PMCID: PMC9601247 DOI: 10.1039/d2sc04031j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/25/2022] [Indexed: 08/26/2023] Open
Abstract
Because of their intriguing luminescence performances, ultrasmall Au nanoparticles (AuNPs) and their assemblies hold great potential in diverse applications, including information security. However, modulating luminescence and assembled shapes of ultrasmall AuNPs to achieve a high-security level of stored information is an enduring and significant challenge. Herein, we report a facile strategy using Pluronic F127 as an adaptive template for preparing Au nanoassemblies (AuNAs) with controllable structures and tunable luminescence to realize hierarchical information encryption through modulating excitation light. The template guided ultrasmall AuNP in situ growth in the inner core and assembled these ultrasmall AuNPs into intriguing necklace-like or spherical nanoarchitectures. By regulating the type of ligand and reductant, their emission was also tunable, ranging from green to the second near-infrared (NIR-II) region. The excitation-dependent emission could be shifted from red to NIR-II, and this significant shift was considerably distinct from the small range variation of conventional nanomaterials in the visible region. In virtue of tunable luminescence and controllable structures, we expanded their potential utility to hierarchical information encryption, and the true information could be decrypted in a two-step sequential manner by regulating excitation light. These findings provided a novel pathway for creating uniform nanomaterials with desired functions for potential applications in information security.
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Affiliation(s)
- Tingyao Zhou
- Shenzhen Key Laboratory of Smart Healthcare Engineering, Department of Biomedical Engineering, Southern University of Science and Technology 1088 Xueyuan Road, Nanshan District Shenzhen Guangdong 518055 P. R. China
| | - Xingyu Jiang
- Shenzhen Key Laboratory of Smart Healthcare Engineering, Department of Biomedical Engineering, Southern University of Science and Technology 1088 Xueyuan Road, Nanshan District Shenzhen Guangdong 518055 P. R. China
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Conti Nibali V, D’Angelo G, Arena A, Ciofi C, Scandurra G, Branca C. TiO2 Nanoparticles Dispersion in Block-Copolymer Aqueous Solutions: Nanoarchitectonics for Self-Assembly and Aggregation. J Funct Biomater 2022; 13:jfb13020039. [PMID: 35466221 PMCID: PMC9036267 DOI: 10.3390/jfb13020039] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/04/2022] [Accepted: 04/07/2022] [Indexed: 02/04/2023] Open
Abstract
Achieving homogenous dispersion of nanoparticles inside a polymeric matrix is a great challenge for numerous applications. In the present study, we aim at understanding the role of different factors on the dispersion properties of TiO2 in pluronic F-127 mixtures. The mixtures were prepared with different pH and guest/host ratios and investigated by UV-Vis spectroscopy, dynamic light scattering, infrared spectroscopy and electrical conductivity. Depending on the preparation conditions, different amounts of TiO2 were loaded within the copolymer as quantitatively determined by UV-Vis spectroscopy. The different content of nanoparticles has direct implications on the gelation and micellization of pluronic analyzed by dynamic light scattering. The information derived on the self-assembly behavior was interpreted in relation to the infrared and conductivity measurements results. Together, these results shed light on the most favorable conditions for improving the nanoparticle dispersion inside the copolymer matrix and suggest a possible strategy to design functional nanoparticle-polymer systems.
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Affiliation(s)
- Valeria Conti Nibali
- Department of Mathematical and Computer Science, Physical Sciences and Earth Sciences, University of Messina, Viale F. Stagno d’Alcontres, 98166 Messina, Italy; (V.C.N.); (G.D.)
| | - Giovanna D’Angelo
- Department of Mathematical and Computer Science, Physical Sciences and Earth Sciences, University of Messina, Viale F. Stagno d’Alcontres, 98166 Messina, Italy; (V.C.N.); (G.D.)
| | - Antonella Arena
- Department of Engineering, University of Messina, Contrada di Dio, I-98166, 98166 Messina, Italy; (A.A.); (C.C.); (G.S.)
| | - Carmine Ciofi
- Department of Engineering, University of Messina, Contrada di Dio, I-98166, 98166 Messina, Italy; (A.A.); (C.C.); (G.S.)
| | - Graziella Scandurra
- Department of Engineering, University of Messina, Contrada di Dio, I-98166, 98166 Messina, Italy; (A.A.); (C.C.); (G.S.)
| | - Caterina Branca
- Department of Mathematical and Computer Science, Physical Sciences and Earth Sciences, University of Messina, Viale F. Stagno d’Alcontres, 98166 Messina, Italy; (V.C.N.); (G.D.)
- Correspondence: ; Tel.: +39-090-6765017
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9
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Rathod S, Patidar R, Ray D, Aswal VK, Shah SA, Ranjan N, Bahadur P, Tiwari S. Monosaccharide-induced growth and higher order transitions in TPGS micelles. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127792] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Micellar solubilization of Lavender oil in aqueous P85/P123 systems: Investigating the associated micellar structural transitions, therapeutic properties and existence of double cloud points. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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11
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Sahu S, Karan P, Mishra AK. Nature of Saccharide-Induced F127 Micellar Dehydration: An Insight with FDAPT (2-Formyl-5-(4'- N, N-dimethylaminophenyl)thiophene), a Multiparametric Fluorescent Probe. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3067-3074. [PMID: 33650876 DOI: 10.1021/acs.langmuir.0c03284] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
FDAPT (2-formyl-5-(4'-N,N-dimethylaminophenyl)thiophene) is an efficient environment-sensitive fluorescent probe, which senses the alteration of its microenvironment with six different fluorescent parameters, namely, emission intensity, wavelength, fluorescence anisotropy, and corresponding three time-dependent parameters fluorescence lifetime, time-resolved emission spectrum, and anisotropy decay. In the present work, the nature of saccharide-induced dehydration of a F127 polymeric micelle is investigated in detail with FDAPT emission. Using a multiparametric fluorescence approach, it is observed that the saccharide molecules not only decrease the critical micellization temperature of the F127 solution but also strongly alter the physical properties inside the micellar structures. The local polarity and fluidity significantly decrease in the saccharide-induced micelle as compared to the normal F127 micelle. The probe solvation dynamics study reveals that the water content in the core as well as corona domain diminishes significantly in the saccharide-induced micelle as compared to the normal micelle. More precisely, dehydration occurs more in the core region than in the corona region. Also, the saccharide-induced dehydration alters the relative size of the core and corona regions. The extent of dehydration varies with different saccharide molecules. It is also found that the dehydration efficiency order is trisaccharide (raffinose) > disaccharide (sucrose) > monosaccharide (glucose and fructose).
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Affiliation(s)
- Saugata Sahu
- Department of Chemistry, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, Chennai 600036, India
| | - Pulak Karan
- Department of Chemistry, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, Chennai 600036, India
| | - Ashok Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, Chennai 600036, India
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Chakrabarti C, Khimani M, Patel V, Parekh P, Pillai S, Mata J, Vekariya RL, Bhadja P, Muddassir M. Solubilization of polycyclic aromatic hydrocarbons (PAHs) in PEO-PPO-PEO type linear and star block copolymers. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115177] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Valero M, Hu W, Houston JE, Dreiss CA. Solubilisation of salicylate in F127 micelles: Effect of pH and temperature on morphology and interactions with cyclodextrin. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114892] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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da Silva JB, Dos Santos RS, da Silva MB, Braga G, Cook MT, Bruschi ML. Interaction between mucoadhesive cellulose derivatives and Pluronic F127: Investigation on the micelle structure and mucoadhesive performance. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 119:111643. [PMID: 33321681 DOI: 10.1016/j.msec.2020.111643] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/15/2020] [Accepted: 10/15/2020] [Indexed: 01/10/2023]
Abstract
Systems composed of bioadhesive and thermoresponsive polymers can combine in situ gelation with bio/mucoadhesion, enhancing retention of topically applied drugs. The effect of bioadhesive sodium carboxymethylcellulose (NaCMC) and hydroxypropyl methylcellulose cellulose (HPMC) on the properties of thermoresponsive Pluronic® F127 (F127) was explored, including micellization and the mucoadhesion. A computational analysis between these polymers and their molecular interactions were also studied, rationalising the design of improved binary polymeric systems for pharmaceutical and biomedical applications. The morphological characterization of polymeric systems was conducted by SEM. DSC analysis was used to investigate the crystallization and micellization enthalpy of F127 and the mixed systems. Micelle size measurements and TEM micrographs allowed for investigation into the interference of cellulose derivatives on F127 micellization. Both cellulose derivatives reduced the critical micellar concentration and enthalpy of micellization of F127, altering hydrodynamic diameters of the aggregates. Mucoadhesion performance was useful to select the best systems for mucosal application. The systems composed of 17.5% (w/w) F127 and 3% (w/w) HPMC or 1% (w/w) NaCMC are promising as topical drug delivery systems, mainly on mucosal surfaces. They were biocompatible when tested against Artemia salina, and also able to release a model of hydrophilic drug in a controlled manner.
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Affiliation(s)
- Jéssica Bassi da Silva
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Research and Development of Drug Delivery Systems, Department of Pharmacy, State University of Maringa, Maringa, PR, Brazil
| | - Rafaela Said Dos Santos
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Research and Development of Drug Delivery Systems, Department of Pharmacy, State University of Maringa, Maringa, PR, Brazil
| | | | - Gustavo Braga
- Department of Chemistry, State University of Maringa, Maringa, Brazil
| | - Michael Thomas Cook
- Research Centre in Topical Drug Delivery and Toxicology, School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, United Kingdom
| | - Marcos Luciano Bruschi
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Research and Development of Drug Delivery Systems, Department of Pharmacy, State University of Maringa, Maringa, PR, Brazil.
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15
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Structural and therapeutic properties of curcumin solubilized pluronic F127 micellar solutions and hydrogels. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113591] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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16
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Effect of curcumin and cosolvents on the micellization of Pluronic F127 in aqueous solution. Colloids Surf B Biointerfaces 2020; 195:111250. [PMID: 32659650 DOI: 10.1016/j.colsurfb.2020.111250] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/02/2020] [Accepted: 07/07/2020] [Indexed: 11/21/2022]
Abstract
The drug solubilization capacity of poloxamers like Pluronic F127 (PF127, poloxamer 407) is dependent on the physical form of the polymer; i.e. the distribution between unimers, aggregates, and micelles. Further, the formation of micelles can alter the stability and pharmacological activity of a drug molecule. It is therefore important to understand how the micellization process is influenced by the addition of excipients and drug molecules. Curcumin is considered a photosensitizer in antimicrobial photodynamic therapy (aPDT). The aPDT effect is optimized at a poloxamer concentration just below the critical micellar concentration (CMC). We aimed to evaluate the effect of curcumin in the presence of 1% ethanol (EtOH) or dimethyl sulfoxide (DMSO) on PF127 micellization. These organic solvents are commonly used in topical preparations as a cosolvent or penetration enhancer (in the case of DMSO). The micellization process was investigated by UV-vis spectroscopy, dynamic light scattering (DLS), and differential scanning calorimetry (DSC). The micellization process of PF127 was slightly influenced by the addition of 1% EtOH or DMSO; however, the presence of 20 μM curcumin enhanced the effect. Micellization was favored in PBS compared to MilliQ water. Structures were formed between PF127 and curcumin at poloxamer concentrations ≥0.3 μM which facilitated solubilization of the photosensitizer. The optimal PF127 concentration required to solubilize 20 μM curcumin but avoid micellization was in the range 0.3 μM-0.04 mM in PBS in the presence of 1 % EtOH or DMSO. A careful consideration of the curcumin, cosolvents, and PF127 concentrations is required to enhance the curcumin solubility and prevent the PF127 micellization.
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Structural and therapeutic properties of Pluronic® P123/F127 micellar systems and their modulation by salt and essential oil. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113231] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Branca C, D'Angelo G. Aggregation behavior of pluronic F127 solutions in presence of chitosan/clay nanocomposites examined by dynamic light scattering. J Colloid Interface Sci 2019; 542:289-295. [DOI: 10.1016/j.jcis.2019.02.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/06/2019] [Accepted: 02/07/2019] [Indexed: 11/28/2022]
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Patel V, Ray D, Bahadur A, Ma J, Aswal VK, Bahadur P. Pluronic ®-bile salt mixed micelles. Colloids Surf B Biointerfaces 2018; 166:119-126. [PMID: 29554645 DOI: 10.1016/j.colsurfb.2018.03.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 02/21/2018] [Accepted: 03/01/2018] [Indexed: 11/28/2022]
Abstract
The present study was aimed to examine the interaction of two bile salts viz. sodium cholate (NaC) and sodium deoxycholate (NaDC) with three ethylene polyoxide-polypropylene polyoxide (PEO-PPO-PEO) triblock copolymers with similar PPO but varying PEO micelles with a focus on the effect of pH on mixed micelles. Mixed micelles of moderately hydrophobic Pluronic® P123 were examined in the presence of two bile salts and compared with those from very hydrophobic L121 and very hydrophilic F127. Both the bile salts increase the cloud point (CP) of copolymer solution and decreased apparent micelle hydrodynamic diameter (Dh). SANS study revealed that P123 forms small spherical micelles showing a decrease in size on progressive addition of bile salts. The negatively charged mixed micelles contained fewer P123 molecules but progressively rich in bile salt. NaDC being more hydrophobic displays more pronounced effect than NaC. Interestingly, NaC shows micellar growth in acidic media which has been attributed to the formation of bile acids by protonation of carboxylate ion and subsequent solubilization. In contrast, NaDC showed phase separation at higher concentration. Nuclear Overhauser effect spectroscopy (NOESY) experiments provided information on interaction and location of bile salts in micelles. Results are discussed in terms of hydrophobicity of bile salts and Pluronics® and the site of bile salt in polymer micelles. Proposed molecular interactions are useful to understand more about bile salts which play important role in physiological processes.
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Affiliation(s)
- Vijay Patel
- Department of Chemistry, Jamanaben Narottambhai Motiram Patel Science College, Bharthana (Vesu), Surat, 395017, India.
| | - Debes Ray
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - Anita Bahadur
- Department of Zoology, Sir P.T. Sarvajanik College of Science, Surat, 395001, India.
| | - Junhe Ma
- Department of Chemistry, Ashland Incorporation, Wilmington, DE 19808, USA.
| | - V K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - Pratap Bahadur
- Department of Chemistry, Veer Narmad South Gujarat University, Surat, 395007, India.
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20
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Vierros S, Sammalkorpi M. Effects of 1-hexanol on C 12E 10 micelles: a molecular simulations and light scattering study. Phys Chem Chem Phys 2018; 20:6287-6298. [PMID: 29431748 DOI: 10.1039/c7cp07511a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The micelles of the non-ionic C12E10 surfactant and 1-hexanol as an aqueous solution additives are studied toward the purpose of understanding the role of alcohol additives in tuning the characteristics of alkyl-ethoxylate micellar systems. Our dynamic light scattering and cloud point experiments show that the addition of hexanol induces a response similar to an increase of temperature. We associate the change with increased attraction between the micelles at low to moderate hexanol loadings and a potential increase of the aggregate size at a high hexanol-to-surfactant ratio. Detailed molecular dynamic simulation characterization shows that hexanol solubilizes to a micelle palisade layer when the hexanol-to-C12E10 ratio is less than or equal to 0.5 while swollen micelles, in which a part of hexanol forms an oil core, are present when the ratio increases above approximately 1.5. The simulations indicate that the surface of the micelles is rough. Formation of reverse hexanol structures akin to those found in bulk octanol is observed in the oil core. Molecular simulations associate the increase in attraction between micelles observed via the experiments with decreased chain density in the headgroup region. This density decrease is caused by hexanol molecules solubilized between neighbouring surfactants. Altogether, these findings provide detailed physical characterization of the effect of an archetypal solution additive, hexanol, on an alkyl ethoxylate micelle system. These findings could bear a significance in designing micellar and emulsion based systems with desired solution characteristics or properties for e.g. drug delivery, catalysis, or platforms for green chemistry reactions.
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Affiliation(s)
- Sampsa Vierros
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, P. O. Box 16100, FI-00076 Aalto, Finland.
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21
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Singla P, Singh O, Chabba S, Aswal VK, Mahajan RK. Sodium deoxycholate mediated enhanced solubilization and stability of hydrophobic drug Clozapine in pluronic micelles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 191:143-154. [PMID: 29028506 DOI: 10.1016/j.saa.2017.10.015] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 10/05/2017] [Accepted: 10/06/2017] [Indexed: 05/04/2023]
Abstract
In this report, the solubilization behaviour of a hydrophobic drug Clozapine (CLZ) in micellar suspensions of pluronics having different hydrophilic lipophilic balance (HLB) ratios viz. P84, F127 and F108 in the absence and presence of bile salt sodium deoxycholate (SDC) has been studied. UV-Vis spectroscopy has been exploited to determine the solubilization capacity of the investigated micellar systems in terms of drug loading efficiency, average number of drug molecules solubilized per micelle (ns), partition coefficient (P) and standard free energy of solubilization (∆G°). The morphological and structural changes taking place in pluronics in different concentration regimes of SDC and with the addition of drug CLZ has been explored using dynamic light scattering (DLS) and small angle neutron scattering (SANS) measurements. The SANS results revealed that aggregation behaviour of pluronic-SDC mixed micelles gets improved in the presence of drug. The micropolarity measurements have been performed to shed light on the locus of solubilization of the drug in pure and mixed micellar systems. The compatibility between CLZ and drug carriers (pluronics and SDC) was confirmed using powder X-ray diffraction (PXRD) and Fourier transform infrared spectroscopy (FTIR) techniques. Among the investigated systems, P84-SDC mixed system was found to be highly efficient for CLZ loading. The long term stability data indicated that CLZ loaded P84-SDC mixed micellar formulation remained stable for 3months at room temperature. Further, it was revealed that the CLZ loaded P84-SDC mixed micelles are converted into CLZ loaded pure P84 micelles at 30-fold dilutions which remain stable up to 48-fold dilutions. The results from the present studies suggest that P84-SDC mixed micelles can serve as suitable delivery vehicles for hydrophobic drug CLZ.
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Affiliation(s)
- Pankaj Singla
- Department of Chemistry, UGC-Centre for Advanced Studies-I, Guru Nanak Dev University, Amritsar 143005, India
| | - Onkar Singh
- Department of Chemistry, UGC-Centre for Advanced Studies-I, Guru Nanak Dev University, Amritsar 143005, India
| | - Shruti Chabba
- Department of Chemistry, UGC-Centre for Advanced Studies-I, Guru Nanak Dev University, Amritsar 143005, India
| | - V K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Rakesh Kumar Mahajan
- Department of Chemistry, UGC-Centre for Advanced Studies-I, Guru Nanak Dev University, Amritsar 143005, India.
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22
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Yeon C, Yun SJ, Yang J, Youn DH, Lim JW. Na-Cation-Assisted Exfoliation of MX 2 (M = Mo, W; X = S, Se) Nanosheets in an Aqueous Medium with the Aid of a Polymeric Surfactant for Flexible Polymer-Nanocomposite Memory Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:1702747. [PMID: 29171691 DOI: 10.1002/smll.201702747] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/18/2017] [Indexed: 06/07/2023]
Abstract
2D nanosheets of transition metal dichalcogenides (TMDCs) have been attracting attention due to their sizable band gap. Facile and effective Na-cation-assisted exfoliation of TMDC (MX2 , M = Mo, W; X = S, Se) nanosheets in an aqueous medium and their application as a composite filler in a polyvinyl alcohol (PVA) matrix are explored in this work. The presence of Na cations is highly beneficial for exfoliating defect-free and few-layer MX2 nanosheets in water in the presence of small-sized micelles of polymeric surfactant, and significantly elevates the exfoliation yield by more than one order of magnitude compared to a conventional surfactant-assisted exfoliation. The strategy suggested in this work is very advantageous compared to both Li cation intercalation in organic solvents and conventional low-yield surfactant-assisted exfoliations. As an application of the exfoliated nanosheets, the fabrication of memory devices with the configuration of Ga-doped ZnO/MX2 -PVA/Ag is demonstrated, and they exhibit bistable and write-once-read-many-times resistive switching behavior with a high ON/OFF current ratio of 3 × 103 at -1.0 V (for WS2 ) and 2.0 V (for MoS2 ). Furthermore, MX2 -PVA nanocomposite fibrous films and mats are successfully fabricated using an electrospinning technique, which can expand the use of TMDC nanofillers in applications involving highly flexible polymer-based MX2 composites.
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Affiliation(s)
- Changbong Yeon
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
- Department of Advanced Device Engineering, University of Science and Technology, 217 Gajeongno, Yuseong-gu, Daejeon, 305-350, South Korea
| | - Sun Jin Yun
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
- Department of Advanced Device Engineering, University of Science and Technology, 217 Gajeongno, Yuseong-gu, Daejeon, 305-350, South Korea
| | - Junjae Yang
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
- Department of Advanced Device Engineering, University of Science and Technology, 217 Gajeongno, Yuseong-gu, Daejeon, 305-350, South Korea
| | - Doo-Hyeb Youn
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
| | - Jung Wook Lim
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
- Department of Advanced Device Engineering, University of Science and Technology, 217 Gajeongno, Yuseong-gu, Daejeon, 305-350, South Korea
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23
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Khimani M, Tseng HW, Aswal VK, Chen LJ, Bahadur P. Salt-assisted microstructure evaluation of hydrophilic block copolymer F98: A thermal and scattering study. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.09.085] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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24
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Effects of Liposomes Contained in Thermosensitive Hydrogels as Biomaterials Useful in Neural Tissue Engineering. MATERIALS 2017; 10:ma10101122. [PMID: 28937646 PMCID: PMC5666928 DOI: 10.3390/ma10101122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 09/16/2017] [Accepted: 09/20/2017] [Indexed: 12/20/2022]
Abstract
Advances in the generation of suitable thermosensitive hydrogels for the delivery of cells in neural tissue engineering demonstrate a delicate relationship between physical properties and capabilities to promote cell proliferation and differentiation. To improve the properties of these materials, it is possible to add liposomes for the controlled release of bioactive elements, which in turn can affect the physical and biological properties of the hydrogels. In the present investigation, different hydrogels based on Pluronic F127 have been formulated with the incorporation of chitosan and two types of liposomes of two different sizes. The rheological and thermal properties and their relation with the neurite proliferation and growth of the PC12 cell line were evaluated. Our results show that the incorporation of liposomes modifies the properties of the hydrogels dependent on the concentration of chitosan and the lipid type in the liposomes, which directly affect the capabilities of the hydrogels to promote the viability and differentiation of PC12 cells.
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25
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Solubilization of phenols by multimolecular aggregates formed by low molecular weight hyperbranched polyglycidol. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.02.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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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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27
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Azadfar M, Hiscox WC, Chen S. Solubilization of lignin in copolymer micelles in aqueous solution. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.05.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Boffito M, Gioffredi E, Chiono V, Calzone S, Ranzato E, Martinotti S, Ciardelli G. Novel polyurethane-based thermosensitive hydrogels as drug release and tissue engineering platforms: design and in vitro
characterization. POLYM INT 2016. [DOI: 10.1002/pi.5080] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Monica Boffito
- Department of Mechanical and Aerospace Engineering; Politecnico di Torino; Corso Duca degli Abruzzi 24 10129 Turin Italy
| | - Emilia Gioffredi
- Department of Mechanical and Aerospace Engineering; Politecnico di Torino; Corso Duca degli Abruzzi 24 10129 Turin Italy
| | - Valeria Chiono
- Department of Mechanical and Aerospace Engineering; Politecnico di Torino; Corso Duca degli Abruzzi 24 10129 Turin Italy
| | - Stefano Calzone
- Department of Mechanical and Aerospace Engineering; Politecnico di Torino; Corso Duca degli Abruzzi 24 10129 Turin Italy
| | - Elia Ranzato
- Dipartimento di Scienze e Innovazione Tecnologica; University of Piemonte Orientale; Viale T. Michel 11 15121 Alessandria Italy
| | - Simona Martinotti
- Dipartimento di Scienze e Innovazione Tecnologica; University of Piemonte Orientale; Viale T. Michel 11 15121 Alessandria Italy
| | - Gianluca Ciardelli
- Department of Mechanical and Aerospace Engineering; Politecnico di Torino; Corso Duca degli Abruzzi 24 10129 Turin Italy
- CNR-IPCF UOS Pisa; Via Moruzzi 1 56124 Pisa Italy
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29
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Integrated Free Energy Model (IFEM) for microemulsions. J Colloid Interface Sci 2016; 466:400-12. [DOI: 10.1016/j.jcis.2015.12.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 12/20/2015] [Accepted: 12/21/2015] [Indexed: 11/22/2022]
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30
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Liu S, Bao H, Li L. Role of PPO–PEO–PPO triblock copolymers in phase transitions of a PEO–PPO–PEO triblock copolymer in aqueous solution. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.08.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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pH induced tuning of size, charge and viscoelastic behavior of aqueous micellar solution of Pluronic ® P104–anthranilic acid mixtures: A scattering, rheology and NMR study. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.01.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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32
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Liu S, Li L. Multiple phase transition and scaling law for poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer in aqueous solution. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2688-2697. [PMID: 25564943 DOI: 10.1021/am507749w] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The multiple phase transition and the scaling behavior of a poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer (Pluronic F127, PEO100-PPO65-PEO100) have been studied by micro-differential scanning calorimetry and rheology. The scaling behavior of the triblock copolymer was examined using the Winter-Chambon criterion to obtain the critical gel temperature Tgel and the scaling exponent n. n was found to decrease linearly with increasing copolymer concentration. A stable hard gel was formed, but the hard gel was transformed into a soft gel upon further heating. Increasing copolymer concentration led to the increase in the temperature of hard-soft gel transition, while the sol-gel transition temperature decreased with increasing copolymer concentration. A phase diagram has been determined, which is able to classify unimers, micelles, hard gel, and soft gel regions upon heating. In addition, the scaling relation of the plateau modulus Ge with copolymer concentration was also obtained as Ge ≈ c(3.0) for both soft gel and hard gel.
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Affiliation(s)
- Sijun Liu
- School of Mechanical and Aerospace Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore
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33
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Ashraf U, Chat OA, Maswal M, Jabeen S, Dar AA. An investigation of Pluronic P123–sodium cholate mixed system: micellization, gelation and encapsulation behavior. RSC Adv 2015. [DOI: 10.1039/c5ra13002f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
We report impact of sodium cholate on micellization and gelation of P123.
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Affiliation(s)
- Uzma Ashraf
- Department of Chemistry
- University of Kashmir
- Srinagar-190 006
- India
| | - Oyais Ahmad Chat
- Department of Chemistry
- University of Kashmir
- Srinagar-190 006
- India
| | - Masrat Maswal
- Department of Chemistry
- University of Kashmir
- Srinagar-190 006
- India
| | - Suraya Jabeen
- Department of Chemistry
- University of Kashmir
- Srinagar-190 006
- India
| | - Aijaz Ahmad Dar
- Department of Chemistry
- University of Kashmir
- Srinagar-190 006
- India
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34
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Dai S, Peng B, Zhang L, Chai L, Wang T, Meng Y, Li X, Wang H, Luo J. Sustainable synthesis of hollow Cu-loaded poly(m-phenylenediamine) particles and their application for arsenic removal. RSC Adv 2015. [DOI: 10.1039/c4ra16499g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new Cu-catalyzed air oxidation method was successfully developed to prepare Cu-loaded poly(m-phenylenediamine) (PmPD) with monomer conversion rates close to 100%.
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Affiliation(s)
- Shuo Dai
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Bing Peng
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
- National Research Centre for Heavy Metal Pollution Prevention & Control
| | - Liyuan Zhang
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Liyuan Chai
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
- National Research Centre for Heavy Metal Pollution Prevention & Control
| | - Ting Wang
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Yun Meng
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Xiaorui Li
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
| | - Haiying Wang
- School of Metallurgy and Environment
- Central South University
- Changsha 410071
- China
- National Research Centre for Heavy Metal Pollution Prevention & Control
| | - Jian Luo
- School of Civil and Environmental Engineering
- Georgia Institute of Technology
- Atlanta
- USA
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35
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Ganguly R, Kumar S, Nath S, Sharma JN, Aswal VK. TBP induced double cloud point in aqueous EO13PO30EO13 solutions: investigating the evolution of associated micellar characteristics as a function of temperature. RSC Adv 2015. [DOI: 10.1039/c4ra12768d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
TBP solubilized Pluronic L64 solutions exhibit inter-micellar attraction driven micellar cluster formation upon cooling, which is unique in non-ionic micellar systems.
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Affiliation(s)
- R. Ganguly
- Chemistry Division
- Bhabha Atomic Research Center
- Mumbai-400085
- India
| | - S. Kumar
- Solid State Physics Division
- Bhabha Atomic Research Center
- Mumbai-400085
- India
| | - S. Nath
- Radiation & Photochemistry Division
- Bhabha Atomic Research Center
- Mumbai-400085
- India
| | - J. N. Sharma
- Process Development Division
- Bhabha Atomic Research Center
- Mumbai-400085
- India
| | - V. K. Aswal
- Solid State Physics Division
- Bhabha Atomic Research Center
- Mumbai-400085
- India
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36
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Bakshi MS. Colloidal micelles of block copolymers as nanoreactors, templates for gold nanoparticles, and vehicles for biomedical applications. Adv Colloid Interface Sci 2014; 213:1-20. [PMID: 25262452 DOI: 10.1016/j.cis.2014.08.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 07/29/2014] [Accepted: 08/07/2014] [Indexed: 12/17/2022]
Abstract
Target drug delivery methodology is becoming increasingly important to overcome the shortcomings of conventional drug delivery absorption method. It improves the action time with uniform distribution and poses minimum side effects, but is usually difficult to design to achieve the desire results. Economically favorable, environment friendly, multifunctional, and easy to design, hybrid nanomaterials have demonstrated their enormous potential as target drug delivery vehicles. A combination of both micelles and nanoparticles makes them fine target delivery vehicles in a variety of biological applications where precision is primarily required to achieve the desired results as in the case of cytotoxicity of cancer cells, chemotherapy, and computed tomography guided radiation therapy.
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Affiliation(s)
- Mandeep Singh Bakshi
- Department of Chemistry, Wilfrid Laurier University, Science Building, 75 University Ave. W., Waterloo, ON N2L 3C5, Canada.
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37
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Shih KC, Li CY, Li WH, Lai HM. Fine structures of self-assembled beta-cyclodextrin/Pluronic in dilute and dense systems: a small angle X-ray scattering study. SOFT MATTER 2014; 10:7606-7614. [PMID: 25121472 DOI: 10.1039/c4sm01147c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The evolution of the fine structures of self-assembled polypseudorotaxane (PPR) in Pluronic (PL F108) solutions containing dilute to dense beta-cyclodextrin (β-CD) was illustrated for the first time by small angle X-ray scattering (SAXS). Dense β-CD (∼19 w/v%) was found feasible to be dispersed in 24% citric acid solution. 5% of PL F108 formed cylindrical micelles of 1 nm in radius and 8 nm in length in the presence of 24% citric acid through the dehydration of citric acid and citrate. PPR was formed through host-guest interaction between PL F108 and β-CD. In dilute β-CD system (1%), the single chains of PPR with separated β-CD stacks on PL F108 were formed. The numbers of β-CD in each stack increased from 1 to 4 on increasing β-CD concentration to 9%. In a dense β-CD system, PPR condensed to correlated structures majorly composed of two unit blocks through the hydrogen bonds between PPRs. Two distinguishable correlated domains with correlation lengths of 50 nm (marked α-phase) and 46 nm (marked β-phase) along the chains, but without fine periodic structure within each individual domain, were identified in the 10% β-CD solution. Periodic stacking of β-CD in the domains developed in the 12% solution. As β-CD concentration increased from 12 to 19%, the correlated heights of α and β phases reduced from 41 and 32 nm to 30 and 10 nm, respectively. There were 48 β-CDs that stabilized on each PL F108 chain in the 19% β-CD system, which is in good agreement with stoichiometry.
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Affiliation(s)
- Kuo-Chih Shih
- Department of Agricultural Chemistry, National Taiwan University, No. 1, Roosevelt Rd., Sec. 4, Taipei 10617, Taiwan.
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