Abstract
Interfacial interactions of cationic surfactants of various chemical structures at the solution / finely dispersed mineral material (quartz and dolomite) interface were studied. It is established that the modification of the surfaces of quartz and dolomite with cationic surfactants leads to a change in the structure and radius of the capillaries due to the formation of adsorption-solvate shells. The hydrophobic ability of cationic surfactants is determined by the structure of the hydrophilic part of their molecules – the balance of amino groups in the alkyl chains and the absence of steric hindrances during adsorption interaction with the surface of mineral materials. The mixture of surfactants containing six amino groups and a polyhydric alcohol glycerin has an effective hydrophobic ability from both aqueous and highly mineralized solutions.
Highlights
It is established that the modification of the surfaces of quartz and dolomite with cationic surfactants leads to a change in the structure and radius of the capillaries due to the formation of adsorption-solvate shells
The hydrophobic ability of cationic surfactants is determined by the structure of the hydrophilic part of their molecules – the balance of amino groups in the alkyl chains and the absence of steric hindrances during adsorption interaction with the surface of mineral materials
И. Подбор химической композиции для вытеснения нефти из обводненных коллекторов / М
Summary
Институт общей и неорганической химии Национальной академии наук Беларуси, Минск, Беларусь. Изучены межфазные взаимодействия катионных ПАВ различного химического строения на границе раздела раствор/тонкодисперсный минеральный материал (кварц и доломит). The hydrophobic ability of cationic surfactants is determined by the structure of the hydrophilic part of their molecules – the balance of amino groups in the alkyl chains and the absence of steric hindrances during adsorption interaction with the surface of mineral materials. Цель работы – изучение межфазных взаимодействий КПАВ различного химического строения на границе раздела раствор/минеральный материал путем оценки их адсорбционной способности, процессов смачивания и изменения свободной поверхностной энергии тонкодисперсных минеральных материалов. В качестве объектов исследования использованы КПАВ с одинаковой длиной углеводородного радикала (С16–С18), отличающиеся строением гидрофильной части молекулы, – оксиэтилированные производные N-алкилпропилендиамина (ОЭДА), соль четвертичного аммониевого основания (ЧАС), композиция из аминопроизводных жирных кислот рапсового масла, содержащая шесть аминогрупп и глицерин (АПЖК), тонкодисперсные фракции (
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