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Features of formation of vinul siloxane function nanolayers on zinc surfaceстатья
- Авторы: Maxim Petrunin, Natalia Gladkikh, Ludmila Maksaeva, Marina Maleeva, Elena Terekhova
- Сборник: Proceedings of the 14th Sino-Russia Symposium on Advanced Materials and Technologies, SRISNMT 2017
- Серия: -
- Год издания: 2017
- Место издания: Proceedings of the 14th Sino-Russia Symposium on Advanced Materials on Advanced Materials and Technologies, November, 2017, Beijing: Metallurgical Industry Press Sanya, Hainan Province, China
- Первая страница: 467
- Последняя страница: 472
- Аннотация: The method of quartz crystal microbalance is used to study adsorption of vinyl trimethoxysilane (VS) on the surface of zinc from an aqueous solution. Adsorption isotherms are obtained. Approaches corresponding to the known adsorption isotherms are used for interpretation of adsorption data: Langmuir, BET, Flory–Huggins, Langmuir multicenter, Temkin, and Langmuir–Freundlich. It is shown that silanes are adsorbed on the surface of thermally deposited zinc from aqueous solutions and displace adsorbed water from the surface by occupying more than six adsorption sites on the surface. It is found that monolayer coverage of the zinc surface is reached at a concentration of the VS solution of 110–4 M. The neighboring adsorbate molecules can interact, forming siloxane dimers and trimers bound to the metal surface by either covalent or hydrogen bonds. Adsorption heats are calculated using different adsorption models. It is shown that VS is chemosorbed on the surface of zinc. An increase in the concentration of the VS solution up to 0.1 M results in formation of polycondensed siloxane oligomers on the surface with polycondensation degree n = 8~12. Oligomer surface fragments are connected with each other by hydrogen bonds and are connected with the surface by Zn–O–Si bridge bonds. The overall thickness of such a layer is 10–12 nm or ten molecular layers.
- Добавил в систему: Шапагина Наталья Андреевна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Статья в сборнике | Prtrunin.pdf | 1,0 МБ | 2 февраля 2018 [fuchsia32] |