Анализ вариации свойств поверхности наночастиц SiO2 и Al2O3, полученных разными методами
Аннотация
Проведено сравнительное исследование поверхностных свойств наночастиц кремнезема и оксида алюминия, синтезированных различными методами.
С помощью инфракрасной спектроскопии показано, что разные методы синтеза влияют на изменение поверхностных свойств наночастиц при сохранении фазового состава материала. Показана связь между типами поверхностных центров, их силой и взаимодействием наночастиц с дисперсионной средой. В частности, наблюдалась значительная разница в силе активных центров для всех образцов, которая отразилась на реологии наножидкостей на основе эпоксидной смолы. Это указывает на важность точного описания свойств поверхности наночастиц, поскольку они
определяют их взаимодействие с другими материалами.
Рассмотрены возможности оценки интенсивности взаимодействия частица-среда через величину фрактальной размерности. Выявлено существенное изменение в ее величине при вариации метода синтеза наночастиц. Обсуждено практическое проявление интенсивности взаимодействия частица-среда через величины дзета-потенциала и межфазного слоя создаваемых наночастицей.
Скачивания
Литература
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