Стан води, адсорбованої поверхнею частинок бурштину та його композитною системою з нанокремнеземом, за даними 1Н ЯМР-спектроскопії

• Дата: 2017
• Автори: Krupskaya, T. V., Yelahina, N. V., Borisenko, N. V., Turov, V. V., Jovaisas, P., Bieliauskiene, R.
• Формат: Стаття
• Мова: Російська
• Опубліковано: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2017
• Онлайн доступ: https://surfacezbir.com.ua/index.php/surface/article/view/649
• Назва журналу: Surface

The state of water in the hydrated amber powder and the amber/SiO2 composite system at a ratio of 1:9 was studied by low-temperature 1H NMR spectroscopy. It is shown that amber gasification in the composition of the composite is completed at a temperature of T = 550 °C, which is almost 100 °C lower than that for the initial amber. The likely cause is a decrease in the size of amber particles when it is immobilized on the surface of nanosilica. It is found that for the amber/SiO2 system with increasing water concentration from 100 to 280 mg/g, the contribution from water clusters whose radius does not exceed 1.5 nm increases. It is shown that in the presence of strong acids at the boundary with a hydrophobic environment, part of the water bound to the surface of the amber/SiO2 composite passes into a weakly associated state, which may serve as one of the signs of increasing the bioavailability of substances desorbed from the composite.