pH-Sensitive Adsorption Behavior of Polymer Particles at the Air–Water Interface
| Autor: | Emiko Mouri, Hideki Matsuoka, Saori Nakayama, Kyohei Uda, Yoshinobu Nakamura, Ko Akiyama, Syuji Fujii |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Analytical chemistry 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Methacrylate Surface pressure 01 natural sciences 0104 chemical sciences Contact angle Adsorption Phase (matter) Monolayer Electrochemistry Particle General Materials Science 0210 nano-technology Reflectometry Spectroscopy |
| Zdroj: | Langmuir. 33:1451-1459 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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