X-Ray Reflectometry Confirms Polymer-&lt;I&gt;Grafted&lt;/I&gt; Silica Particle Monolayer Formation at the Air–Water Interface

Mouri, Emiko; Okazaki, Yoshitaka; Yoshinaga, Kohji; Matsuoka, Hideki

doi:10.1166/jnn.2009.j038

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…20 21 We showed that they formed a stable "mono" layer not a multilayer, and the particle monolayer structure is strongly dependent both on graft density and molecular weight although we did not reveal which is the more dominant factor in monolayer formation. In this article, we report the effect of the molecular weight of the grafted polymer with the PMMA-grafted latex particle monolayer system.…”

Section: Introductionmentioning

confidence: 64%

Particle Monolayer Formation with Arrayed Structure by PMMA-<I>Grafted</I> Polystyrene Latex at the Air–Water Interface

Mouri

Terada²,

Koga³

et al. 2010

J. Nanosci. Nanotech.

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The structure of the particle monolayer formed by the polymer-grafted latex particle at the air-water interface was estimated mainly by pi--A isotherm measurement and SEM observation to examine the effect of core particle characteristics and to generalize the key factors in determining the polymer-grafted particle monolayer structure. Methyl methacrylate (MMA) was polymerized from the polystyrene latex (PSL) surface by atom transfer radical polymerization to give a PMMA-grafted PSL (PSL-PMMA) with a relatively high graft density of about 0.2 nm-2. We obtained PSL-PMMA with PMMA of different molecular weights but almost the same graft density. The onset area of increasing surface pressure in pi-A isotherm was in agreement with the value of effective radius of PSL-PMMA with quite extended PMMA chains. The particle monolayer structure deposited on the substrate was strongly dependent on the molecular weight of the grafted PMMA. The aggregation size was reduced with increasing molecular weight and a lattice-like structure was observed for PSL-PMMA monolayer with a high molecular weight PMMA. The interparticle distance was decreased and structure becomes ordered with increasing surface pressure. The monolayer structure obtained here was consistent with that of the PMMA-grafted silica particle system. We also synthesized polystyrene (PS)-grafted PMMA latex (PML-PS) and compared the two systems. We confirmed that the lattice-like structure depended on the nature of the grafted PMMA chain, not the core particle characteristics.

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Section: Introductionmentioning

confidence: 64%

Particle Monolayer Formation with Arrayed Structure by PMMA-<I>Grafted</I> Polystyrene Latex at the Air–Water Interface

Mouri

Terada²,

Koga³

et al. 2010

J. Nanosci. Nanotech.

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“…An X-ray reflectivity study about the structural change in the plateau-like region was reported in a previous work [40].…”

Section: Characteristics Of Sio 2 -Pmma Particlesmentioning

confidence: 86%

Structural estimation of particle arrays at air–water interface based on silica particles with well‐defined and highly grafted poly(methyl methacrylate)

Moon

Kim

Paik

et al. 2009

Polymer Engineering & Sci

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Silica nanoparticles with well-defined, highly grafted dense poly(methyl methacrylate) (MMA) were prepared by surface-initiated activators regenerated by electron transfer for atom transfer radical polymerization (ARGET ATRP) of methyl methacrylate with an initiatorfixed silica particle in the presence of air. Two different polymerizations of MMA were carried out under the same conditions using tris[2-(dimethylamino)ethyl]-amine (Me 6 TREN) and N,N,N 0 ,N 0 ,N 00 -pentamethyldiethylene-triamine (PMDETA) as the ligand, respectively. In the CuCl 2 /PMDETA system, polymerization appeared to be more controlled with a lower polydisperisty compared with the CuCl 2 /Me 6 TREN system. The monolayer of these particles was formed at the air-water interface using Langmuir-Blodgett (LB) technique. Multilayers of the particles were fabricated by repetition of LB depositing. A surface pressure-area (p-A) measurement and SEM observation were used to characterize the particle arrays.

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“…Here, the pH-sensitive adsorption of polymer particles at the air–water interface is investigated in detail using a surface tensiometer, a Langmuir–Blodgett (LB) trough, and an X-ray reflectometer. X-ray reflectometry (XR) is a powerful method for investigating particles adsorbed at the air–water interface − and is applied to stimuli-responsive solid particles for the first time in the present work. The interfacial position of colloidal particles is also investigated using a polycyanoacrylate trapping method .…”

Section: Introductionmentioning

confidence: 99%

pH-Sensitive Adsorption Behavior of Polymer Particles at the Air–Water Interface

Fujii¹,

Mouri

Akiyama³

et al. 2017

Langmuir

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pH-Sensitive adsorption of polymer particles bearing poly[2-(dimethylamino)ethyl methacrylate] hairs at the air-water interface was investigated using a surface tensiometer, a Langmuir-Blodgett trough, and an X-ray reflectometer. We clarified that the particles are adsorbed at the interface at basic pH; by contrast, at acidic pH, only a small number of particles are adsorbed, whereas the majority are dispersed in the water phase. X-ray reflectometry analysis revealed that a particle monolayer was formed at the air-water interface, which was packed densely under increasing surface pressure, as determined by the electron density profile change. The contact angles of the particles at the air-water interface were estimated to be 29° and 34° at pH 3 and 10, respectively, by direct visualization of the air-water interface position of the particles using a polycyanoacrylate trapping method.

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X-Ray Reflectometry Confirms Polymer-<I>Grafted</I> Silica Particle Monolayer Formation at the Air–Water Interface

Cited by 6 publications

References 11 publications

Particle Monolayer Formation with Arrayed Structure by PMMA-<I>Grafted</I> Polystyrene Latex at the Air–Water Interface

Particle Monolayer Formation with Arrayed Structure by PMMA-<I>Grafted</I> Polystyrene Latex at the Air–Water Interface

Structural estimation of particle arrays at air–water interface based on silica particles with well‐defined and highly grafted poly(methyl methacrylate)

pH-Sensitive Adsorption Behavior of Polymer Particles at the Air–Water Interface

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