Interfacial characteristics of binary polymer blend films spread at the air-water interface

Kawaguchi, Masami

doi:10.1016/j.cis.2017.05.004

Cited by 6 publications

(7 citation statements)

References 38 publications

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“…13 For example, flexible poly(vinyl acetate) has been shown to be miscible with rigid-rod-like poly(n-hexyl isocyanate) or poly(4-hydroxystyrene) in Langmuir films but immiscible with polydimethylsiloxane (PDMS) or poly(methyl methacrylate). 13 However, to our best knowledge, the literature does not report many in situ structural studies based on NR, XRR, or GISAXS on polymer− polymer blends at the air−water interface compared with polymer−surfactant systems. 14,15 Unexpected features with respect to 3D corresponding blends can also be revealed.…”

Section: ■ Introductionmentioning

confidence: 93%

“…In the case of the blends, one important issue is the compatibility or incompatibility of the two polymers at the air–water interface, since it cannot easily be predicted from the polymer structures and from their 3D behavior due to confinement effects and the influence of the air–water interface. Kawaguchi reviewed miscible and immiscible polymer blend Langmuir monolayers using essentially thermodynamical measurements, Brewster angle microscopy (BAM), and surface rheology characterizations as well as AFM imaging of LB films . For example, flexible poly(vinyl acetate) has been shown to be miscible with rigid-rod-like poly( n -hexyl isocyanate) or poly(4-hydroxystyrene) in Langmuir films but immiscible with polydimethylsiloxane (PDMS) or poly(methyl methacrylate) .…”

Section: Introductionmentioning

confidence: 99%

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Surface Pressure-Induced Interdiffused Structure Evidenced by Neutron Reflectometry in Cellulose Acetate/Polybutadiene Langmuir Films

et al. 2021

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Binary blends of water-insoluble polymers are a versatile strategy to obtain nanostructured films at the air–water interface. However, there are few reported structural studies of such systems in the literature. Depending on the compatibility of the polymers and the role of the air–water interface, one can expect various morphologies. In that context, we probed Langmuir monolayers of cellulose acetate (CA), of deuterated and postoxidized polybutadiene (PBd) and three mixtures of CA/PBd at various concentrations by coupling surface pressure–area isotherms, Brewster angle microscopy (BAM), and neutron reflectometry at the air–water interface to determine their thermodynamic and structural properties. The homogeneity of the films in the vertical direction, averaged laterally over the spatial coherence length of the neutron beam (∼5 μm), was assessed by neutron reflectometry measurements using D2O/H2O subphases contrast-matched to the mixed films. At 5 mN/m, the whole mixed films can be described by a single slightly hydrated thin layer. However, at 15 mN/m, the fit of the reflectivity curves requires a two-layer model consisting of a CA/PBd blend layer in contact with the water, interdiffused with a PBd layer at the interface with air. At intermediate surface pressure (10 mN/m), the determined structure was between those obtained at 5 and 15 mN/m depending on film composition. This PBd enrichment at the air–film interface at high surface pressure, which leads to the PBd depletion in the blend monolayer at the water surface, is attributed to the hydrophobic character of this polymer compared with the predominantly hydrophilic CA.

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Section: ■ Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Surface Pressure-Induced Interdiffused Structure Evidenced by Neutron Reflectometry in Cellulose Acetate/Polybutadiene Langmuir Films

et al. 2021

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“…The Langmuir-Blodgett (LB) method is one of the most favorable tools for the in vitro study of the interaction at the air-water interface [12–14]. The importance of electron microscopy to modern technology is self-evident, and the atomic force microscope (AFM) is a scanning probe microscope known for its unique measurement conditions (room temperature and no vacuum) and high-resolution surface topography.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fe₃O₄ Nanoparticles on Mixed POPC/DPPC Monolayers at Air-Water Interface

Hao

Xie

et al. 2019

Scanning

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Fe3O4 nanoparticles (NPs) as a commonly used carrier in targeted drug delivery are widely used to carry drugs for the treatment of diseases. However, the mechanism of action of between Fe3O4 NPs and biological membranes is still unclear. Therefore, this article reports the influence of hydrophilic and hydrophobic Fe3O4 NPs on mixed 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) and 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) that were studied using the Langmuir-Blodgett (LB) film technique and an atomic force microscope (AFM). From surface pressure-area (π-A) isotherms, we have calculated the compression modulus. The results showed that hydrophobic Fe3O4 NPs enlarged the liquid-expanded (LE) and liquid-condensed (LC) phase of the mixed POPC/DPPC monolayers. The compressibility modulus of the mixed POPC/DPPC monolayer increases for hydrophilic Fe3O4 NPs, but the opposite happens for the hydrophobic Fe3O4 NPs. The adsorption of hydrophobic Fe3O4 NPs in mixed POPC/DPPC monolayers was much more than the hydrophilic Fe3O4 NPs. The interaction of hydrophilic Fe3O4 NPs with the head polar group of the mixed lipids increased the attraction force among the molecules, while the interaction of hydrophobic Fe3O4 NPs with the tail chain of the mixed lipids enhanced the repulsive force. The morphology of the monolayers was observed by AFM for validating the inferred results. This study is of great help for the application of Fe3O4 NPs in biological systems.

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“…Polymer blend films are applied when it is required to have the properties of two or more polymers at the same time. [115,116] Polymer blend is defined as the mixture of at least two polymers, copolymers, or macromolecular substances where each ingredient's content be no less than 2%. [117] Although mixing polymers might seem a simple procedure, it has to be considered that the mixture is often not ultimately compatible; In fact, most polymer blends are partially miscible.…”

Section: Polymer Blend Filmsmentioning

confidence: 99%

Polyvinyl alcohol‐based membranes for filtration of aqueous solutions: A comprehensive review

Razmgar

Nasiraee

2021

Polymer Engineering & Sci

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This review provides a comprehensive overview on applications, preparation methods, and most notably the performance efficiency of polyvinyl alcohol (PVA)-based membranes for filtration of aqueous environments. Incorporation of PVA into the membrane matrix significantly enhances such characteristics as antifouling and antibacterial properties as well as hydrophilicity and permeability in the water and wastewater filtrations. Contribution of different PVAbased modular membranes for water purification targets via a comparative review on previous researches is the main theme in this work. Alongside with the focused topic, some basic theories and principals of blend and composite polymer films as well as polymer fibers are debated before the main discussions. This review will ultimately facilitate further development of PVA membranes for the future investigations.

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Interfacial characteristics of binary polymer blend films spread at the air-water interface

Cited by 6 publications

References 38 publications

Surface Pressure-Induced Interdiffused Structure Evidenced by Neutron Reflectometry in Cellulose Acetate/Polybutadiene Langmuir Films

Surface Pressure-Induced Interdiffused Structure Evidenced by Neutron Reflectometry in Cellulose Acetate/Polybutadiene Langmuir Films

Effect of Fe₃O₄ Nanoparticles on Mixed POPC/DPPC Monolayers at Air-Water Interface

Polyvinyl alcohol‐based membranes for filtration of aqueous solutions: A comprehensive review

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Interfacial characteristics of binary polymer blend films spread at the air-water interface

Cited by 6 publications

References 38 publications

Surface Pressure-Induced Interdiffused Structure Evidenced by Neutron Reflectometry in Cellulose Acetate/Polybutadiene Langmuir Films

Surface Pressure-Induced Interdiffused Structure Evidenced by Neutron Reflectometry in Cellulose Acetate/Polybutadiene Langmuir Films

Effect of Fe3O4 Nanoparticles on Mixed POPC/DPPC Monolayers at Air-Water Interface

Polyvinyl alcohol‐based membranes for filtration of aqueous solutions: A comprehensive review

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Effect of Fe₃O₄ Nanoparticles on Mixed POPC/DPPC Monolayers at Air-Water Interface