РЕОЛОГИЧЕСКИЕ ХАРАКТЕРИСТИКИ ПОВЕРХНОСТНЫХ СЛОЕВ ЦЕТИЛТРИМЕТИЛАММОНИЙ БРОМИДА НА ГРАНИЦЕ РАЗДЕЛА ВОДНЫЙ РАСТВОР-ВОЗДУХ
Електронний архів E-archive DonNTU – (Electronic archive Donetsk National Technical University)
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
РЕОЛОГИЧЕСКИЕ ХАРАКТЕРИСТИКИ ПОВЕРХНОСТНЫХ СЛОЕВ ЦЕТИЛТРИМЕТИЛАММОНИЙ БРОМИДА НА ГРАНИЦЕ РАЗДЕЛА ВОДНЫЙ РАСТВОР-ВОЗДУХ
RHEOLOGICAL CHARACTERISTICS OF SURFACE LAYERS CETYLTRIMETHYLAMMONIUM BROMIDE AT THE INTERFACE OF AQUEOUS SOLUTION-AIR |
|
| Creator |
Хилько, Светлана Леонидовна
|
|
| Subject |
ПАВ
дилатационная реология цетилтриметиламмоний бромид поверхностные слои surfactants rheology dilated cetyltrimethylammonium bromide surface layers |
|
| Description |
Изучены реологические характеристики поверхностных слоев цетилтриметиламмоний бромида (вязкоупругие, упругие и вязкостные) на границе раздела водный раствор-воздух. Установлено, что сочетание высоких значений модуля упругости и дилатационной вязкости характеризует поверхностные слои цетилтриметиламмоний бромида как упругие неньютоновские пленки.
Dilatation rheological properties of the surface layers of the surface-active agents (surfactants) are due to the ability of the surfactant molecules interact with each other and form a structured adsorbed layers. Adsorbed layers of surfactants characterized mechanical properties - elasticity and viscosity. In this paper were studied rheological characteristics of the surface layers of cetyltrimethylammonium bromide (CTAB) - viscoelastic on the concentration of CTAB. The values оf elastic modulus, viscous modulus and dilatational viscosity were calculated. Rheological properties of the surface layers of CTAB were studied by rheometry dilated (form method oscillating drops) - Tensiometer PAT-2P SINTERFACE Technologies, Germany. It was shown that the variation of the concentration of the viscoelastic modulus of CTAB have a pronounced maximum at ССТАБ ≈ 0.01-0,05 mmol/l, indicating the formation of stable surface layers of CTAB at these concentrations. It was found that the viscous (imaginary) part of the module viscoelasticity of adsorption layers of cetyltrimethylammonium bromide is much lower than its elastic (real) component. In this case, the oscillation frequency has almost no effect on the elastic and viscous characteristics of the surface layers of CTAB. Dilatational viscosity change is extreme in nature and has a pronounced maximum at ССТАБ ≈ 0.01-0,05 mmol/l. The dependence of the change of dilated (surface) viscosity оn the concentration of CTAB depends strongly on the frequency of oscillation. The results of research showed that the combination of high values modulus of elasticity and viscosity characterizes dilated superficial layers of cetyltrimethylammonium bromide as a non-Newtonian elastic film. |
|
| Date |
2013-04-13T13:25:50Z
2013-04-13T13:25:50Z 2013 |
|
| Type |
Article
|
|
| Identifier |
2074-6652
УДК 544.72:541.183 http://ea.donntu.edu.ua/handle/123456789/18469 |
|
| Relation |
Наукові праці ДонНТУ;Серія: Хімія і хімічна технологія, 2013. - Вип.2(21). - С.108-111
|
|
| Publisher |
Донецк, ДонНТУ
|
|