Visualization of supramolecular framework of perfluorinated-oligomer colloid particles by supercritical drying


Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

Aerogels of the tetrafluoroethylene radical polymerization products H(C2F4)nR, where R is the radical formed by the abstraction of a hydrogen atom from a solvent molecule, have been obtained by replacing the solvent with supercritical CO2 and its subsequent rapid evaporation. According to the data of scanning electron and atomic force microscopy, the aerogel consists of loosely bound particles of 1–3 μm in diameter, which is two to three times that of colloid particles in the initial solution, where the particles consist of an oligomer framework filled with solvent molecules. The internal structure of the framework is manifested in the surface topography with a roughness coefficient of 1.6–1.8. High roughness leads to the formation of ultrahydrophobic coatings with contact angles of >160°. A model of supercritical drying in which the solvent is removed from the colloidal particles without alteration of the supramolecular structure is discussed.

Авторлар туралы

I. Kim

Institute of Problems of Chemical Physics

Хат алмасуға жауапты Автор.
Email: ipkim@icp.ac.ru
Ресей, Chernogolovka, Moscow oblast, 142432

A. Kostin

Institute of Problems of Chemical Physics

Email: ipkim@icp.ac.ru
Ресей, Chernogolovka, Moscow oblast, 142432

N. Dremova

Institute of Problems of Chemical Physics

Email: ipkim@icp.ac.ru
Ресей, Chernogolovka, Moscow oblast, 142432

V. Benderskii

Institute of Problems of Chemical Physics

Email: ipkim@icp.ac.ru
Ресей, Chernogolovka, Moscow oblast, 142432

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