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Chan DHH, Hunter SJ, Neal TJ, Lindsay C, Taylor P, Armes SP. Adsorption of sterically-stabilized diblock copolymer nanoparticles at the oil-water interface: effect of charged end-groups on interfacial rheology. SOFT MATTER 2022; 18:6757-6770. [PMID: 36040127 DOI: 10.1039/d2sm00835a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The RAFT aqueous emulsion polymerization of either methyl methacrylate (MMA) or benzyl methacrylate (BzMA) is conducted at 70 °C using poly(glycerol monomethacrylate) (PGMA) as a water-soluble precursor to produce sterically-stabilized diblock copolymer nanoparticles of approximately 30 nm diameter. Carboxylic acid- or morpholine-functional RAFT agents are employed to confer anionic or cationic functionality at the ends of the PGMA stabilizer chains, with a neutral RAFT agent being used as a control. Thus the electrophoretic footprint of such minimally-charged model nanoparticles can be adjusted simply by varying the solution pH. Giant (mm-sized) aqueous droplets containing such nanoparticles are then grown within a continuous phase of n-dodecane and a series of interfacial rheology measurements are conducted. The interfacial tension between the aqueous phase and n-dodecane is strongly dependent on the charge of the terminal group on the stabilizer chains. More specifically, neutral nanoparticles produce a significantly lower interfacial tension than either cationic or anionic nanoparticles. Moreover, adsorption of neutral nanoparticles at the n-dodecane-water interface produces higher interfacial elastic moduli than that observed for charged nanoparticles. This is because neutral nanoparticles can adsorb at much higher surface packing densities owing to the absence of electrostatic repulsive forces in this case.
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Affiliation(s)
- Derek H H Chan
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF, UK.
| | - Saul J Hunter
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF, UK.
| | - Thomas J Neal
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF, UK.
| | - Christopher Lindsay
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK.
| | - Philip Taylor
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK.
| | - Steven P Armes
- Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF, UK.
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2
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Yu X, Li G, Zheng B, Youn G, Jiang T, Quah SP, Laughlin ST, Sampson NS, Bhatia SR. Controlling Rheology of Fluid Interfaces through Microblock Length of Sequence-Controlled Amphiphilic Copolymers. MACROMOL CHEM PHYS 2022; 223:2200110. [PMID: 36588980 PMCID: PMC9799073 DOI: 10.1002/macp.202200110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Indexed: 01/05/2023]
Abstract
Previous studies have demonstrated that films of sequence-controlled amphiphilic copolymers display contact angles that depend on microblock size. This suggests that microblock length may provide a means of tuning surface and interfacial properties. In this work, the interfacial rheology of a series of sequence-controlled copolymers, prepared through the addition of bicyclo[4.2.0]oct-1(8)-ene-8-carboxamide (monomer A) and cyclohexene (monomer B) to generate sequences up to 24 monomeric units composed of (A m B n ) i microblocks, where m, n, and i range from 1 to 6. Interfacial rheometry is used to measure the mechanical properties of an air-water interface with these copolymers. As the microblock size increases, the interfacial storage modulus, G', increases, which may be due to an increase in the size of interfacial hydrophobic domains. Small-angle X-ray scattering shows that the copolymers have a similar conformation in solution, suggesting that any variations in the mechanics of the interface are due to assembly at the interface, and not on solution association or bulk rheological properties. This is the first study demonstrating that microblock size can be used to control interfacial rheology of amphiphilic copolymers. Thus, the results provide a new strategy for controlling the dynamics of fluid interfaces through precision sequence-controlled polymers.
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Affiliation(s)
- Xiaoxi Yu
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Guofang Li
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Bingqian Zheng
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Gyusaang Youn
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Ting Jiang
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Suan P Quah
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Scott T Laughlin
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Nicole S Sampson
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Surita R Bhatia
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
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3
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Poirier A, Stocco A, Kapel R, In M, Ramos L, Banc A. Sunflower Proteins at Air-Water and Oil-Water Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:2714-2727. [PMID: 33599128 DOI: 10.1021/acs.langmuir.0c03441] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The adsorption of a sunflower protein extract at two air-water and oil-water interfaces is investigated using tensiometry, dilational viscoelasticity, and ellipsometry. For both interfaces, a three step mechanism was evidenced thanks to master curve representations of the data taken at different aging times and protein concentrations. At short times, a diffusion limited adsorption of proteins at interfaces is demonstrated. First, a two-dimensional protein film is formed with a partition of the polypeptide chains in the two phases that depends strongly on the nature of the hydrophobic phase: most of the film is in the aqueous phase at the air-water interface, while it is mostly in the organic phase at the oil-water interface. Then a three-dimensional saturated monolayer of proteins is formed. At short times, adsorption mechanisms are analogous to those found with typical globular proteins, while strong divergences are observed at longer adsorption times. Following the saturation step, a thick layer expands in the aqueous phase and appears associated with the release of large objects in the bulk. The kinetic evolution of this second layer is compatible with a diffusion limited adsorption of the minor population of polymeric complexes with hydrodynamic radius RH ∼ 80 nm, evidenced in equilibrium with hexameric globulins (RH ∼ 6 nm) in solution. These complexes could result from the presence of residual polyphenols in the extract and raise the question of the role of these compounds in the interfacial properties of plant protein extracts.
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Affiliation(s)
- Alexandre Poirier
- Laboratoire Charles Coulomb (L2C), Univ. Montpellier, CNRS, Montpellier, France
| | - Antonio Stocco
- Laboratoire Charles Coulomb (L2C), Univ. Montpellier, CNRS, Montpellier, France
- Institut Charles Sadron (ICS), CNRS-UPR22, 23 rue du Loess BP 84047, 67034 Cedex 2 Strasbourg, France
| | - Romain Kapel
- Site Plateforme Sciences du Vivant et de la Santé, Laboratoire Réactions et Génie des Procédés (LRGP), 54500 Vandoeuvre-les-Nancy, France
| | - Martin In
- Laboratoire Charles Coulomb (L2C), Univ. Montpellier, CNRS, Montpellier, France
| | - Laurence Ramos
- Laboratoire Charles Coulomb (L2C), Univ. Montpellier, CNRS, Montpellier, France
| | - Amélie Banc
- Laboratoire Charles Coulomb (L2C), Univ. Montpellier, CNRS, Montpellier, France
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Davidson ML, Laufer L, Gottlieb M, Walker LM. Transport of Flexible, Oil-Soluble Diblock and BAB Triblock Copolymers to Oil/Water Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:7227-7235. [PMID: 32482075 DOI: 10.1021/acs.langmuir.0c00477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The connection between block copolymer architecture and adsorption at fluid/fluid interfaces is poorly understood. We characterize the interfacial properties of a well-defined series of polyethylene oxide/polydimethyl siloxane (PDMS) diblock and BAB triblock copolymers at the dodecane/water interface. They are oil-soluble and quite flexible because of their hydrophobic PDMS block. Rather than relying on equilibrium interfacial measurements for which it is difficult to mitigate experimental uncertainty during adsorption, we combine measurements of steady-state adsorption, dilatational rheology, and adsorption/desorption dynamics. Steady-state interfacial pressure is insensitive to interfacial curvature and mostly agrees with theory. Adsorption does not occur in the diffusive limit as is the case for many aqueous, small-molecule surfactants. Dilatational rheology reveals differences in behavior between the diblocks and triblocks, and all interfaces possess elasticities below the thermodynamic limit. Desorption dynamics show that material exchange between the interface and the neighboring fluid occurs too slowly to relax dilatational stresses. The mechanism of relaxation occurs at the interface, likely from the reorientation of adsorbed chains.
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Affiliation(s)
- Michael L Davidson
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Liat Laufer
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Moshe Gottlieb
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Lynn M Walker
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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5
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Lee JY, Sung M, Seo H, Park YJ, Lee JB, Shin SS, Lee Y, Shin K, Kim JW. Temperature-responsive interdrop association of condensed attractive nanoemulsions. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.02.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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7
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Li Z, An S, Liu Y, Hua Z, Li F, Wang X, Jing B, Tan Y. Practical Modification of Tannic Acid Polyether Demulsifier and Its Highly Efficient Demulsification for Water-in-Aging Crude Oil Emulsions. ACS OMEGA 2019; 4:20697-20707. [PMID: 31858055 PMCID: PMC6906932 DOI: 10.1021/acsomega.9b02933] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 11/15/2019] [Indexed: 06/10/2023]
Abstract
In order to break the aging crude oil (WACO) emulsion of the offshore platform more effectively, a highly active isocyanate, polyaryl polymethylene isocyanate (PAPI), was selected to modify the pilot-scale tannic acid demulsifier. In the addition of PAPI, its molecular weight and viscosity dramatically increased, while its relative solubility, hydroxyl number, and cloud point exhibited an opposite direction, showing an increase in hydrophobicity. After adding the above modified demulsifier, a remarkably improved water removal of WACO emulsion accompanied by a notable reduction of the water content in the oil phase monitored by the Karl Fischer method was observed. Demulsification on the offshore platform demonstrated that the best water removal was achieved when the proportion of PAPI is 1.5 wt %. Its demulsification efficiency reached 95.7%, which was 25.6% higher than the 76.2% of unmodified demulsifier. In addition, a positive correlation between viscoelasticity of emulsion and demulsification performance was found by only adjusting the parameters of the rheometer. This method may be utilized to characterize the demulsification performance by any rotary rheometer. The pilot-scale demulsification experiment demonstrated that the water removal can reach 98.14 vol % and residual water content was only 0.55 vol %. These results further confirmed the excellent demulsification performance of the modified demulsifier toward the WACO emulsion in production.
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Affiliation(s)
- Zhongwei Li
- Shandong
Provincial Key Laboratory of Processing and Testing Technology of
Glass & Functional Ceramics, College of Material Science and Engineering, Qilu University of Technology (Shandong Academy of
Sciences), Jinan 250353, People′s Republic of China
| | - Shuguo An
- School
of Chemistry and Chemical Engineering, Shandong
University, Jinan 250100, People′s Republic
of China
- Key
laboratory of Special Functional Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, People′s Republic of China
| | - Yafan Liu
- Shandong
Provincial Key Laboratory of Processing and Testing Technology of
Glass & Functional Ceramics, College of Material Science and Engineering, Qilu University of Technology (Shandong Academy of
Sciences), Jinan 250353, People′s Republic of China
| | - Zhao Hua
- Technology
Research and Department Center of CNOOC Research Institute, State
Key Laboratory of Offshore Oil Exploitation, Beijing 100027, People′s Republic of China
| | - Fujun Li
- School
of Chemistry and Chemical Engineering, Shandong
University, Jinan 250100, People′s Republic
of China
- Key
laboratory of Special Functional Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, People′s Republic of China
| | - Xiujun Wang
- Technology
Research and Department Center of CNOOC Research Institute, State
Key Laboratory of Offshore Oil Exploitation, Beijing 100027, People′s Republic of China
| | - Bo Jing
- Technology
Research and Department Center of CNOOC Research Institute, State
Key Laboratory of Offshore Oil Exploitation, Beijing 100027, People′s Republic of China
| | - Yebang Tan
- School
of Chemistry and Chemical Engineering, Shandong
University, Jinan 250100, People′s Republic
of China
- Key
laboratory of Special Functional Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, People′s Republic of China
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8
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Trégouët C, Salez T, Pantoustier N, Perrin P, Reyssat M, Monteux C. Probing the adsorption/desorption of amphiphilic polymers at the air-water interface during large interfacial deformations. SOFT MATTER 2019; 15:6200-6206. [PMID: 31328760 DOI: 10.1039/c9sm00368a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Hydrophobically modified polymers are good candidates for the stabilization of liquid interfaces thanks to the high anchoring energy of the hydrophobic parts. In this article we probe the interfacial anchoring of a series of home-made hydrophobically modified polymers with controlled degree of grafting by studying their behavior upon large area dilations and compressions. By comparing the measured interfacial tension to the one that we expect in the case of a constant number of adsorbed monomers, we are able to deduce whether desorption or adsorption occurs during area variations. We find that the polymer chains with the longest hydrophobic grafts desorb at larger compressions compared to the polymers with the shortest grafts, because of their larger desorption energy. Furthermore, for a given graft length, we observe more desorption for polymers with the highest grafting densities. We attribute this counter intuitive result to the fact that at high grafting densities, the length of the polymer loops is shorter, and hence the elastic penalty upon compression is larger for these layers, leading to a faster desorption. Comparing the elastic penalty to thermal energy, kBT, enables deducing a critical grafting density above which desorption of grafts is expected upon compression, which is consistent with our experimental results. In the case of large area dilations, the experiments reveal that the number of adsorbed anchors remains constant in the case of chains with a low grafting density while chains with the highest degree of grafting seem to show some degree of adsorption during the dilatation. Therefore, in these highly grafted chains there may be unadsorbed grafts remaining in the vicinity of the interface, which may adsorb quickly at the interface upon dilatation.
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Affiliation(s)
- C Trégouët
- Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, Sorbonne University, ESPCI Paris, UMR 7615 CNRS, 10 rue Vauquelin, 75231 Paris cedex 05, France and UMR CNRS Gulliver 7083, ESPCI Paris, PSL Research University, 75005 Paris, France
| | - T Salez
- Univ. Bordeaux, CNRS, LOMA, UMR 5798, F-33405 Talence, France and Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Hokkaido 060-0808, Japan.
| | - N Pantoustier
- Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, Sorbonne University, ESPCI Paris, UMR 7615 CNRS, 10 rue Vauquelin, 75231 Paris cedex 05, France
| | - P Perrin
- Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, Sorbonne University, ESPCI Paris, UMR 7615 CNRS, 10 rue Vauquelin, 75231 Paris cedex 05, France
| | - M Reyssat
- UMR CNRS Gulliver 7083, ESPCI Paris, PSL Research University, 75005 Paris, France
| | - C Monteux
- Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, Sorbonne University, ESPCI Paris, UMR 7615 CNRS, 10 rue Vauquelin, 75231 Paris cedex 05, France and Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Hokkaido 060-0808, Japan.
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9
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Wang C, Chen Z, Dong J, Ullah S, Zhao L, Zhang G, Xu B. Interfacial rheological behaviors of amphiphilic sodium cholesteryl glycylglycine. SOFT MATTER 2019; 15:699-708. [PMID: 30624445 DOI: 10.1039/c8sm02383b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The present study was conducted to investigate the effects of the strong van der Waals interaction and sterol skeleton of surfactants on their interfacial rheological behaviors by comparing the interfacial properties of sodium cholesteryl glycylglycine (Chol-GG-Na) and sodium lauryl glycylglycine (C12-GG-Na) at the oil-aqueous interface. The interfacial dilational rheological experiment results indicate a significant increase in the interfacial activity and intermolecular interaction with the introduction of the cholesteryl group. Therefore, a compact interfacial layer with a remarkably high dilational modulus was obtained with the adsorption of Chol-GG-Na. The cholesteryl group also has a significant impact on the dynamic processes such as it slows down the motion of the molecules due to which the diffusion exchange between the bulk and the interface decreases. Besides, the rigid skeleton makes rearrangement and conformation adjustment difficult. These impacts become more pronounced when the adsorption layer approaches a close and ordered arrangement, which has been confirmed by the relaxation measurements. The reported results provide a theoretical foundation for the potential applications of cholesteryl-based surfactants in the food, pharmaceutical, cosmetic and petroleum industries.
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Affiliation(s)
- Ce Wang
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China.
| | - Zhenghong Chen
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China.
| | - Jianrui Dong
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China.
| | - Sana Ullah
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China.
| | - Li Zhao
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China.
| | - Guiju Zhang
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China.
| | - Baocai Xu
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China.
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10
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Trégouët C, Mikhailovskaya A, Salez T, Pantoustier N, Perrin P, Reyssat M, Monteux C. Adsorption dynamics of hydrophobically modified polymers at an air-water interface. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2018; 41:101. [PMID: 30182262 DOI: 10.1140/epje/i2018-11711-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 08/01/2018] [Indexed: 06/08/2023]
Abstract
Using surface-tension measurements, we study the brush-limited adsorption dynamics of a range of amphiphilic polymers, PAAH-[Formula: see text]-[Formula: see text] composed of a poly(acrylic acid) backbone, PAAH, grafted with a fraction [Formula: see text] of alkyl moieties, containing either n = 8 or n = 12 carbon atoms, at pH conditions where the PAAH backbone is not charged. At short times, the surface tension decreases more sharply as the degree of grafting increases, while, at long times, the adsorption dynamics becomes logarithmic in time and is slower as the degree of grafting increases. This logarithmic behavior at long times indicates the building of a free-energy barrier which grows over time. To account for the observed surface tension evolution with the degree of grafting we propose a scenario, where the free-energy barrier results from both the deformation of the incoming polymer coils and the deformation of the adsorbed brush. Our model involves only two fitting parameters, the monomer size and the area needed for one molecule during adsorption and is in agreement with the experimental data. We obtain a reasonable value for the monomer size and find an area per adsorbed polymer chain of the order of 1 nm2, showing that the polymer chains are strongly stretched as they adsorb.
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Affiliation(s)
- C Trégouët
- Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, UPMC Univ Paris 06, ESPCI Paris, UMR 7615 CNRS, 10 rue Vauquelin, 75231, Paris Cedex 05, France
- UMR CNRS Gulliver 7083, ESPCI Paris, PSL Research University, 10 rue Vauquelin, 75231, Paris cedex 05, France
| | - A Mikhailovskaya
- Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, UPMC Univ Paris 06, ESPCI Paris, UMR 7615 CNRS, 10 rue Vauquelin, 75231, Paris Cedex 05, France
| | - T Salez
- Univ. Bordeaux, CNRS, LOMA, UMR 5798, F-33405, Talence, France
- Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, 060-0808, Hokkaido, Japan
| | - N Pantoustier
- Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, UPMC Univ Paris 06, ESPCI Paris, UMR 7615 CNRS, 10 rue Vauquelin, 75231, Paris Cedex 05, France
| | - P Perrin
- Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, UPMC Univ Paris 06, ESPCI Paris, UMR 7615 CNRS, 10 rue Vauquelin, 75231, Paris Cedex 05, France
| | - M Reyssat
- UMR CNRS Gulliver 7083, ESPCI Paris, PSL Research University, 10 rue Vauquelin, 75231, Paris cedex 05, France
| | - C Monteux
- Laboratoire Sciences et Ingénierie de la Matière Molle, PSL Research University, UPMC Univ Paris 06, ESPCI Paris, UMR 7615 CNRS, 10 rue Vauquelin, 75231, Paris Cedex 05, France.
- Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, 060-0808, Hokkaido, Japan.
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Poirier A, Banc A, Stocco A, In M, Ramos L. Multistep building of a soft plant protein film at the air-water interface. J Colloid Interface Sci 2018; 526:337-346. [DOI: 10.1016/j.jcis.2018.04.087] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/22/2018] [Accepted: 04/23/2018] [Indexed: 01/24/2023]
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12
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Hydrophobically modified dextrans as stabilizers for O/W highly concentrated emulsions. Comparison with commercial non-ionic polymeric stabilizers. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.04.022] [Citation(s) in RCA: 7] [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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13
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Shah V, Bharatiya B, Shah DO. Effect of molecular weight and diffusivity on the adsorption of PEO-PPO-PEO block copolymers at PTFE-water and oil-water interfaces. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4346-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Zhou H, Cao XL, Guo LL, Guo ZY, Liu M, Zhang L, Zhang L, Zhao S. Studies on the interfacial dilational rheology of films containing heavy oil fractions as related to emulsifying properties. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.01.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Desbrières J, López-Gonzalez E, Aguilera-miguel A, Sadtler V, Marchal P, Castel C, Choplin L, Durand A. Dilational rheology of oil/water interfaces covered by amphiphilic polysaccharides derived from dextran. Carbohydr Polym 2017; 177:460-468. [DOI: 10.1016/j.carbpol.2017.09.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 09/05/2017] [Accepted: 09/05/2017] [Indexed: 11/30/2022]
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16
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Zaki AM, Carbone P. How the Incorporation of Pluronic Block Copolymers Modulates the Response of Lipid Membranes to Mechanical Stress. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:13284-13294. [PMID: 29084428 DOI: 10.1021/acs.langmuir.7b02244] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We employ atomistic molecular dynamics simulations to investigate the effect that the incorporation of the nonionic amphiphilic copolymer known as Pluronic L64 has on the mechanical stability of a DPPC membrane. The simulations reveal that the incorporation of the polymer chains leads to membranes that can sustain increasing mechanical stresses. Analysis of mechanical, structural, and dynamic properties of the membrane shows that the polymer chains interact strongly with the lipids in the vicinity, restraining their mobility and imparting better mechanical stability to the membrane. The hybrid membranes under tension remain thicker, more ordered, and stiffer in comparison to their lipid analogues. Trans-bilayer lipid movements (flip-flop) are observed and appear to be triggered by the presence of the polymer chains. A careful analysis of the pore formation under high tensions reveals two distinctive mechanisms that depend on the distribution of the hydrophilic polymer blocks in the bilayer. Finally, the rate of growth of the formed membrane defects is slowed down in the presence of polymers. These findings show that Pluronic block copolymers could be exploited for the formation of optimized hybrid nanodevices with controlled elastic and dynamic properties.
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Affiliation(s)
- Afroditi Maria Zaki
- School of Chemical Engineering and Analytical Science, The University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Paola Carbone
- School of Chemical Engineering and Analytical Science, The University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
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17
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Conformation mediated preferential swelling of amphiphilic block copolymer ultrathin films. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1384-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Bodratti AM, Sarkar B, Alexandridis P. Adsorption of poly(ethylene oxide)-containing amphiphilic polymers on solid-liquid interfaces: Fundamentals and applications. Adv Colloid Interface Sci 2017; 244:132-163. [PMID: 28069108 DOI: 10.1016/j.cis.2016.09.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 09/23/2016] [Accepted: 09/23/2016] [Indexed: 12/30/2022]
Abstract
The adsorption of amphiphilic molecules of varying size on solid-liquid interfaces modulates the properties of colloidal systems. Nonionic, poly(ethylene oxide) (PEO)-based amphiphilic molecules are particularly useful because of their graded hydrophobic-hydrophilic nature, which allows for adsorption on a wide array of solid surfaces. Their adsorption also results in other useful properties, such as responsiveness to external stimuli and solubilization of hydrophobic compounds. This review focuses on the adsorption properties of PEO-based amphiphiles, beginning with a discussion of fundamental concepts pertaining to the adsorption of macromolecules on solid-liquid interfaces, and more specifically the adsorption of PEO homopolymers. The main portion of the review highlights studies on factors affecting the adsorption and surface self-assembly of PEO-PPO-PEO block copolymers, where PPO is poly(propylene oxide). Block copolymers of this type are commercially available and of interest in several fields, due to their low toxicity and compatibility in aqueous systems. Examples of applications relevant to the interfacial behavior of PEO-PPO-PEO block copolymers are paints and coatings, detergents, filtration, and drug delivery. The methods discussed herein for manipulating the adsorption properties of PEO-PPO-PEO are emphasized for their ability to shed light on molecular interactions at interfaces. Knowledge of these interactions guides the formulation of novel materials with useful mesoscale organization and micro- and macrophase properties.
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Truszkowska D, Henrich F, Schultze J, Koynov K, Räder H, Butt HJ, Auernhammer G. Forced dewetting dynamics of high molecular weight surfactant solutions. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.07.073] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Svitova TF, Lin MC. Dynamic interfacial properties of human tear-lipid films and their interactions with model-tear proteins in vitro. Adv Colloid Interface Sci 2016; 233:4-24. [PMID: 26830077 DOI: 10.1016/j.cis.2015.12.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 12/15/2015] [Accepted: 12/15/2015] [Indexed: 11/16/2022]
Abstract
This review summarizes the current state of knowledge regarding interfacial properties of very complex biological colloids, specifically, human meibum and tear lipids, and their interactions with proteins similar to the proteins found in aqueous part of human tears. Tear lipids spread as thin films over the surface of tear-film aqueous and play crucial roles in tear-film stability and overall ocular-surface health. The vast majority of papers published to date report interfacial properties of meibum-lipid monolayers spread on various aqueous sub-phases, often containing model proteins, in Langmuir trough. However, it is well established that natural human ocular tear lipids exist as multilayered films with a thickness between 30 and 100nm, that is very much disparate from 1 to 2nm thick meibum monolayers. We employed sessile-bubble tensiometry to study the dynamic interfacial and rheological properties of reconstituted multilayered human tear-lipid films. Small amounts (0.5-1μg) of human tear lipids were deposited on an air-bubble surface to produce tear-lipid films in thickness range 30-100nm corresponding to ocular lipid films. Thus, we were able to overcome major Langmuir-trough method limitations because ocular tear lipids can be safely harvested only in minute, sub-milligram quantities, insufficient for Langmuir through studies. Sessile-bubble method is demonstrated to be a versatile tool for assessing conventional synthetic surfactants adsorption/desorption dynamics at an air-aqueous solution interface. (Svitova T., Weatherbee M., Radke C.J. Dynamics of surfactant sorption at the air/water interface: continuous-flow tensiometry. J. Colloid Interf. Sci. 2003;261:1170-179). The augmented flow-sessile-bubble setup, with step-strain relaxation module for dynamic interfacial rheological properties and high-precision syringe pump to generate larger and slow interfacial area expansions-contractions, was developed and employed in our studies. We established that this method is uniquely suitable for examination of multilayered lipid-film interfacial properties. Recently it was compellingly proven that chemical composition of human tear lipids extracted from whole tears is substantially different from that of meibum lipids. To be exact, healthy human tear lipids contain 8-16% of polar lipids, similar to lung lipids, and they are mostly double-tailed phospholipids, with C16 and longer alkyl chains. Rationally, one would assume that the results obtained for meibum lipids, devoid of surface-active components such as phospholipids, and, above all, in a form of monolayers, are not pertinent or useful for elucidating behavior and stability of an averaged 60-nm thick ocular tear-lipid films in vivo. The advantage of sessile-bubble technique, specifically, using a small amount of lipids required to attain multilayered films, unlocks the prospect of evaluating and comparing the interfacial properties of human tear lipids collected from a single individual, typically 100-150μg. This is in sharp contrast with several milligrams of lipids that would be required to build equally thick films for Langmuir-trough experiments. The results of our studies provided in-depth understanding of the mechanisms responsible for properties and stability of human tear-lipid films in vivo. Here we summarize recent publications and our latest findings regarding human tear-lipid interfacial properties, their chemical composition, and their interaction with model proteins mimicking the proteins found in human tear-aqueous phase.
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Affiliation(s)
- Tatyana F Svitova
- University of California, Berkeley, School of Optometry, Clinical Research Center, United States
| | - Meng C Lin
- University of California, Berkeley, School of Optometry, Clinical Research Center, United States; University of California, Vision Science Program, United States
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Zheng Y, Wyman IW. Supramolecular Nanostructures Based on Cyclodextrin and Poly(ethylene oxide): Syntheses, Structural Characterizations and Applications for Drug Delivery. Polymers (Basel) 2016; 8:E198. [PMID: 30979290 PMCID: PMC6431930 DOI: 10.3390/polym8050198] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/10/2016] [Accepted: 05/10/2016] [Indexed: 11/16/2022] Open
Abstract
Cyclodextrins (CDs) have been extensively studied as drug delivery carriers through host⁻guest interactions. CD-based poly(pseudo)rotaxanes, which are composed of one or more CD rings threading on the polymer chain with or without bulky groups (or stoppers), have attracted great interest in the development of supramolecular biomaterials. Poly(ethylene oxide) (PEO) is a water-soluble, biocompatible polymer. Depending on the molecular weight, PEO can be used as a plasticizer or as a toughening agent. Moreover, the hydrogels of PEO are also extensively studied because of their outstanding characteristics in biological drug delivery systems. These biomaterials based on CD and PEO for controlled drug delivery have received increasing attention in recent years. In this review, we summarize the recent progress in supramolecular architectures, focusing on poly(pseudo)rotaxanes, vesicles and supramolecular hydrogels based on CDs and PEO for drug delivery. Particular focus will be devoted to the structures and properties of supramolecular copolymers based on these materials as well as their use for the design and synthesis of supramolecular hydrogels. Moreover, the various applications of drug delivery techniques such as drug absorption, controlled release and drug targeting based CD/PEO supramolecular complexes, are also discussed.
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Affiliation(s)
- Yue Zheng
- Department of internal medicine, The First Hospital in Qinhuangdao Affiliated to Hebei Medical University, Qinhuangdao 066004, China.
| | - Ian W Wyman
- Department of Chemistry, Queen's University, Kingston, ON K7L 3N6, Canada.
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Viscoelasticity of chia (Salvia hispanica L.) seed mucilage dispersion in the vicinity of an oil-water interface. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2015.03.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhang J, Jing B, Tan G, Zhai L, Fang S, Ma Y. Comparison of Performances of Different Types of Clarifiers for the Treatment of Oily Wastewater Produced from Polymer Flooding. CAN J CHEM ENG 2015. [DOI: 10.1002/cjce.22216] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jian Zhang
- State Key Laboratory of Offshore Oil Exploitation; Beijing 100027 China
- Beijing Research Center of China National Offshore Oil Corporation; Beijing 100027 China
| | - Bo Jing
- State Key Laboratory of Offshore Oil Exploitation; Beijing 100027 China
- Beijing Research Center of China National Offshore Oil Corporation; Beijing 100027 China
| | - Guorong Tan
- State Key Laboratory of Offshore Oil Exploitation; Beijing 100027 China
- Beijing Research Center of China National Offshore Oil Corporation; Beijing 100027 China
| | - Lei Zhai
- State Key Laboratory of Offshore Oil Exploitation; Beijing 100027 China
- Beijing Research Center of China National Offshore Oil Corporation; Beijing 100027 China
| | - Shenwen Fang
- School of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu Sichuan 610500 China
| | - Yongzhang Ma
- School of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu Sichuan 610500 China
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Adsorption at the biocompatible α-pinene–water interface and emulsifying properties of two eco-friendly surfactants. Colloids Surf B Biointerfaces 2014; 122:623-629. [DOI: 10.1016/j.colsurfb.2014.07.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 07/24/2014] [Accepted: 07/25/2014] [Indexed: 11/19/2022]
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Aggregation behavior of X-shaped branched block copolymers at the air/water interface: effect of block sequence and temperature. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3392-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Torcello-Gómez A, Wulff-Pérez M, Gálvez-Ruiz MJ, Martín-Rodríguez A, Cabrerizo-Vílchez M, Maldonado-Valderrama J. Block copolymers at interfaces: interactions with physiological media. Adv Colloid Interface Sci 2014; 206:414-27. [PMID: 24268588 DOI: 10.1016/j.cis.2013.10.027] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Revised: 10/23/2013] [Accepted: 10/23/2013] [Indexed: 12/20/2022]
Abstract
Triblock copolymers (also known as Pluronics or poloxamers) are biocompatible molecules composed of hydrophobic and hydrophilic blocks with different lengths. They have received much attention recently owing to their applicability for targeted delivery of hydrophobic compounds. Their unique molecular structure facilitates the formation of dynamic aggregates which are able to transport lipid soluble compounds. However, these structures can be unstable and tend to solubilize within the blood stream. The use of nanoemulsions as carriers for the lipid soluble compounds appears as a new alternative with improved protection against physiological media. The interfacial behavior of block copolymers is directly related to their peculiar molecular structure and further knowledge could provide a rational use in the design of poloxamer-stabilized nanoemulsions. This review aims to combine the new insights gained recently into the interfacial properties of block copolymers and their performance in nanoemulsions. Direct studies dealing with the interactions with physiological media are also reviewed in order to address issues relating metabolism degradation profiles. A better understanding of the physico-chemical and interfacial properties of block copolymers will allow their manipulation to modulate lipolysis, hence allowing the rational design of nanocarriers with efficient controlled release.
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Carrillo-Navas H, Pérez-Alonso C, Fouconnier B, Vernon-Carter E, Alvarez-Ramírez J. Inertial effects of adsorbed glycerol monostearate crystals on the shear rheology of water/canola oil interfaces. J FOOD ENG 2014. [DOI: 10.1016/j.jfoodeng.2013.10.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Iliafar S, Vezenov D, Jagota A. In-plane force–extension response of a polymer confined to a surface. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2013.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Torcello-Gómez A, Maldonado-Valderrama J, Jódar-Reyes A, Cabrerizo-Vílchez M, Martín-Rodríguez A. Pluronic-covered oil–water interfaces under simulated duodenal conditions. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2012.12.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Samanta S, Hezaveh S, Roccatano D. Theoretical Study of Binding and Permeation of Ether-Based Polymers through Interfaces. J Phys Chem B 2013; 117:14723-31. [DOI: 10.1021/jp4028832] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Susruta Samanta
- School of Engineering and
Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
| | - Samira Hezaveh
- School of Engineering and
Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
| | - Danilo Roccatano
- School of Engineering and
Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany
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Pérez-Mosqueda LM, Maldonado-Valderrama J, Ramírez P, Cabrerizo-Vílchez MA, Muñoz J. Interfacial characterization of Pluronic PE9400 at biocompatible (air–water and limonene–water) interfaces. Colloids Surf B Biointerfaces 2013; 111:171-8. [DOI: 10.1016/j.colsurfb.2013.05.029] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 05/13/2013] [Accepted: 05/18/2013] [Indexed: 01/17/2023]
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Effect of inorganic salts on the aggregation behavior of branched block polyether at air/water and n-heptane/water interfaces. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-013-3013-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pérez-Mosqueda L, Ramírez P, Alfaro M, Rincón F, Muñoz J. Surface properties and bulk rheology of Sterculia apetala gum exudate dispersions. Food Hydrocoll 2013. [DOI: 10.1016/j.foodhyd.2013.02.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Gong H, Xu G, Liu T, Xu L, Zhai X, Zhang J, Lv X. Aggregation behaviors of PEO-PPO-ph-PPO-PEO and PPO-PEO-ph-PEO-PPO at an air/water interface: experimental study and molecular dynamics simulation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:13590-13600. [PMID: 22954368 DOI: 10.1021/la303430c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The block polyethers PEO-PPO-ph-PPO-PEO (BPE) and PPO-PEO-ph-PEO-PPO (BEP) are synthesized by anionic polymerization using bisphenol A as initiator. Compared with Pluronic P123, the aggregation behaviors of BPE and BEP at an air/water interface are investigated by the surface tension and dilational viscoelasticity. The molecular construction can influence the efficiency and effectiveness of block polyethers in decreasing surface tension. BPE has the most efficient ability to decrease surface tension of water among the three block polyethers. The maximum surface excess concentration (Γ(max)) of BPE is larger than that of BEP or P123. Moreover, the dilational modulus of BPE is almost the same as that of P123, but much larger than that of BEP. The molecular dynamics simulation provides the conformational variations of block polyethers at the air/water interface.
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Affiliation(s)
- Houjian Gong
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, P. R. China
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