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Fractal Growth of Giant Amphiphiles in Langmuir-Blodgett Films. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2722-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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El Haitami A, Goldmann M, Cousin F, Dosseh G, Cantin S. From Homogeneous to Segregated Structure of Poly(dimethylsiloxane)/Cellulose Derivative Mixed Langmuir Films Depending on Composition: An in Situ Neutron Reflectivity Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6395-6403. [PMID: 26017847 DOI: 10.1021/acs.langmuir.5b01197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The mixing behavior of deuterated polydimethylsiloxane (PDMSd) and cellulose acetate butyrate (CAB) spread as Langmuir films at the air-water interface was studied by means of surface pressure-area isotherms, Brewster angle microscopy (BAM) observations, and in situ neutron reflectivity. The contrast variation method was used with different D2O/H2O mixtures as subphase, allowing contrast matching to either CAB, PDMSd, or PDMSd/CAB mixed film if homogeneous. At PDMSd volume fractions Φ lower than 0.6, the mixed film is a homogeneous monolayer throughout the film compression, in agreement with the monophasic film observed by BAM and the attractive interactions between PDMSd and CAB evidenced from the isotherm measurements. In contrast, at PDMSd volume fractions Φ higher than 0.6, a vertically segregated structure of the mixed film is highlighted. Indeed, whatever the surface pressure, a bilayer structure is observed with a PDMSd layer in contact with the air over a thin CAB layer in contact with the subphase. These results show that the structure of the film is mainly driven by the PDMSd volume fraction which allows obtaining either a homogeneous membrane which composition can be tuned or a vertically segregated system. In contrast, only the thickness of the layers varies with the surface pressure while the structure of the film is not affected.
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Affiliation(s)
- Alae El Haitami
- †Laboratoire de Physicochimie des Polymères et des Interfaces (LPPI, EA 2528), Institut des Matériaux, Université de Cergy-Pontoise, 5 mail Gay-Lussac Neuville/Oise, Cergy-Pontoise Cedex 95000, France
| | - Michel Goldmann
- ‡Institut des Nanosciences de Paris (INSP, UMR 7588), Université Pierre et Marie Curie, 4 place Jussieu, Paris 75252 Cedex 05, France
- §UFR Biomédicale des Saints-Pères, Université Paris Descartes, 45 rue des St pères, 75006 Paris, France
| | - Fabrice Cousin
- ∥Laboratoire Léon Brillouin (LLB), CEA-CNRS, Saclay, Gif-sur-Yvette Cedex 91191, France
| | - Gilberte Dosseh
- †Laboratoire de Physicochimie des Polymères et des Interfaces (LPPI, EA 2528), Institut des Matériaux, Université de Cergy-Pontoise, 5 mail Gay-Lussac Neuville/Oise, Cergy-Pontoise Cedex 95000, France
| | - Sophie Cantin
- †Laboratoire de Physicochimie des Polymères et des Interfaces (LPPI, EA 2528), Institut des Matériaux, Université de Cergy-Pontoise, 5 mail Gay-Lussac Neuville/Oise, Cergy-Pontoise Cedex 95000, France
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Naolou T, Busse K, Lechner BD, Kressler J. The behavior of poly( ε $$ \boldsymbol{\upvarepsilon} $$ -caprolactone) and poly(ethylene oxide)-b-poly( ε $$ \boldsymbol{\upvarepsilon} $$ -caprolactone) grafted to a poly(glycerol adipate) backbone at the air/water interface. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3168-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Naolou T, Busse K, Kressler J. Synthesis of Well-Defined Graft Copolymers by Combination of Enzymatic Polycondensation and “Click” Chemistry. Biomacromolecules 2010; 11:3660-7. [DOI: 10.1021/bm1011085] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Toufik Naolou
- Martin Luther University Halle-Wittenberg, Department of Chemistry, D-06099 Halle (Saale), Germany
| | - Karsten Busse
- Martin Luther University Halle-Wittenberg, Department of Chemistry, D-06099 Halle (Saale), Germany
| | - Jörg Kressler
- Martin Luther University Halle-Wittenberg, Department of Chemistry, D-06099 Halle (Saale), Germany
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Malzert-Fréon A, Abillon O, Proust JE, Gref R, Benoît JP, Boury F. Interactions between hen egg-white lysozyme, PEG2,000, and PLA50 at the air–water interface. Colloids Surf B Biointerfaces 2005; 42:97-106. [PMID: 15833660 DOI: 10.1016/j.colsurfb.2005.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2004] [Indexed: 11/18/2022]
Abstract
In this paper, we compared the efficiency of polymer films, made of a poly(ethylene glycol) (PEG2,000)/poly(d,l-lactide) (PLA50) mixture, or a PEG2,000-PLA50 copolymer, to prevent adsorption of a model protein, the hen egg-white lysozyme (HEWL), at the air-water interface. This was achieved by analyzing the surface pressure/surface area curves, and the X-ray reflectivity data of the polymer films spread on a Langmuir trough, obtained in absence or in presence of the protein. For both the mixture and the copolymer, the amount of protein adsorbed at the air-water interface decreases when the density of the polymer surface coverage increases. It was shown that even in a condensed state, the polymer film made by the mixture can not totally prevent HEWL molecules to adsorb and penetrate the polymer mixed film, but however, protein molecules would not be directly exposed to the more hydrophobic phase, i.e. the air phase. It was also shown that the configuration adopted by the copolymer at the interface in its condensed state would prevent adsorption of HEWL molecules for several hours; this would be due in particular to the presence of PEG segments in the interfacial film.
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Affiliation(s)
- A Malzert-Fréon
- Laboratoire de Pharmacie Galénique, UFR de Sciences Pharmaceutiques, bd Becquerel, 14032 Caen, France
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Mouri E, Matsumoto K, Matsuoka H, Torikai N. Nanostructure of a "carpet"-like dense layer/polyelectrolyte brush layer in a block copolymer monolayer at the air-water interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:1840-1847. [PMID: 15723480 DOI: 10.1021/la040028e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The "carpet"/brush double layer structure in the polyelectrolyte layer in the amphiphilic diblock copolymer monolayer at the air-water interface was quantitatively studied by in situ neutron reflectometry in addition to X-ray reflectivity measurements. As a result of the higher contrast between polyelectrolyte [poly(methacrylic acid)] and solvent (D(2)O) for the neutron, the brush structure could be estimated more accurately as a function of surface pressure, that is, brush density. The thickness of the carpet layer, which is thought to be formed to reduce the interfacial free energy between water and the hydrophobic layer, was almost constant at 10-20 A at any surface pressure studied. Growth was clearly observed in the whole brush length with increasing surface pressure, and it was estimated to be almost 60% of the full-stretch length of the ionic polymer chain. Furthermore, by the comparison of density profiles by neutron and X-ray reflectometry, an anomalous hydration was suggested.
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Affiliation(s)
- Emiko Mouri
- Department of Polymer Chemistry, Kyoto University, Kyoto 615-8510, Japan
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Hussain H, Kerth A, Blume A, Kressler J. Amphiphilic Block Copolymers of Poly(ethylene oxide) and Poly(perfluorohexylethyl methacrylate) at the Water Surface and Their Penetration into the Lipid Monolayer. J Phys Chem B 2004. [DOI: 10.1021/jp0495702] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. Hussain
- Department of Engineering Science and Department of Chemistry, Martin-Luther-University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - A. Kerth
- Department of Engineering Science and Department of Chemistry, Martin-Luther-University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - A. Blume
- Department of Engineering Science and Department of Chemistry, Martin-Luther-University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - J. Kressler
- Department of Engineering Science and Department of Chemistry, Martin-Luther-University Halle-Wittenberg, D-06099 Halle (Saale), Germany
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Paeng K, Choi J, Park Y, Sohn D. Temperature effect of hydrophobically modified polyethylene oxide at the air–water interface. Colloids Surf A Physicochem Eng Asp 2003. [DOI: 10.1016/s0927-7757(03)00071-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Miller AF, Richards RW, Webster JRP. Transition in Tethered Layer Thickness Induced by Concentration Changes in a Spread Film of an Amphiphilic Graft Copolymer. Macromolecules 2001. [DOI: 10.1021/ma010873t] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aline F. Miller
- Interdisciplinary Research Centre in Polymer Science and Technology, University of Durham, Durham DH1 3LE, UK
| | - Randal W. Richards
- Interdisciplinary Research Centre in Polymer Science and Technology, University of Durham, Durham DH1 3LE, UK
| | - John R. P. Webster
- ISIS Science Division, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX 11 0QZ, UK
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Miller AF, Richards RW, Webster JRP. Organization of Well-Defined Amphiphilic Graft Copolymers at the Air−Water Interface. Macromolecules 2000. [DOI: 10.1021/ma000205s] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aline F. Miller
- Interdisciplinary Research Centre in Polymer Science and Technology, University of Durham, DURHAM DH1 3LE, U.K
| | - Randal W. Richards
- Interdisciplinary Research Centre in Polymer Science and Technology, University of Durham, DURHAM DH1 3LE, U.K
| | - John R. P. Webster
- ISIS Science Division, Rutherford Appleton Laboratory, Chilton, DIDCOT OX1 OQZ, U.K
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Fauré MC, Bassereau P, Lee LT, Menelle A, Lheveder C. Phase Transitions in Monolayers of PS−PEO Copolymer at the Air−Water Interface. Macromolecules 1999. [DOI: 10.1021/ma9900840] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - C. Lheveder
- Laboratoire de Physique Statistique de l'Ecole Normale Supérieure, 24 Rue Lhomond, 75231 Paris Cedex 05, France
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Webster J, Langridge S. Applications of index matching in reflectometry, SANS and Brewster angle microscopy. Curr Opin Colloid Interface Sci 1999. [DOI: 10.1016/s1359-0294(99)00040-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Buzza DMA, Jones JL, McLeish TCB, Richards RW. Theory of surface light scattering from a fluid–fluid interface with adsorbed polymeric surfactants. J Chem Phys 1998. [DOI: 10.1063/1.477114] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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