X-RAY REFLECTOMETRY OF THIN FILMS FORMED DURING PHASE SEPARATION OF ORGANIC SOLUTIONS OF ALIPHATIC POLYETHERS IN WATER

V. E. Asadchikov; Асадчиков В. Е.; Yu. O. Volkov; Волков Ю. О.; B. S. Roshchin; Рощин Б. С.; A. D. Nuzhdin; Нуждин А. Д.; E. R. Chernavskay; Чернавская Е. Р.; A. M. Tikhonov; Тихонов А. М.; A. V. Mironov; Миронов А. В.; A. O. Mariyanac; Мариянац А. О.; V. K. Popov; Попов В. К.

doi:10.31857/S0023476123010022

X-RAY REFLECTOMETRY OF THIN FILMS FORMED DURING PHASE SEPARATION OF ORGANIC SOLUTIONS OF ALIPHATIC POLYETHERS IN WATER

Autores: Asadchikov V.¹, Volkov Y.¹, Roshchin B.¹, Nuzhdin A.¹, Chernavskay E.², Tikhonov A.³, Mironov A.¹, Mariyanac A.¹, Popov V.¹
Afiliações:
1. Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences, Moscow, 119333 Russia
2. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409 Russia
3. Kapitza Institute for Physical Problems, Russian Academy of Sciences, Moscow, 119334 Russia
Edição: Volume 68, Nº 1 (2023)
Páginas: 94-99
Seção: ПОВЕРХНОСТЬ, ТОНКИЕ ПЛЕНКИ
URL: https://journals.rcsi.science/0023-4761/article/view/137373
DOI: https://doi.org/10.31857/S0023476123010022
EDN: https://elibrary.ru/DMWVLY
ID: 137373

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Resumo

The possibilities of X-ray reflectometry for studying the structure of planar liquid-phase membranes are demonstrated by the example of polyester films formed on the surface of deionized water from solutions of polylactoglycolide (PLG) in chloroform and tetraglycol (TG). It is found that the use of solutions with PLG concentrations ranging from 1 to 4 wt % or above 6 wt % leads to a proportional increase in the density of these films with preservation of their structure and thickness up to 25 Å. At a PLG concentration close to 5 wt % the PLG/TG system transits to an unstable state, characterized by intense penetration of PLG aliphatic chains into the water substrate bulk to a depth up to 100 Å.

Palavras-chave

X-RAY REFLECTOMETRY, THIN FILMS, ORGANIC SOLUTIONS

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