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Abstract
The article deals with the production, sorption and rheological properties of composite materials based on polymer hydrogel and bentonite. It is shown that bentonite prevents the collapse of the hydrogel in aqueous solutions of electrolytes and leads to an increase in the moisture content after the collapse. After several repeated cycles of swelling in water, followed by drying at 60 and 110 °C, the degree of swelling of the composite is higher than that of the hydrogel. In the temperature range from 20 to 40 °C, the polymer hydrogel and the composite are able to withstand at least ten cycles of swelling and drying without changing the degree of swelling.
Highlights
The article deals with the production, sorption and rheological properties of composite materials based on polymer hydrogel and bentonite
It is shown that bentonite prevents the collapse of the hydrogel in aqueous solutions of electrolytes and leads to an increase in the moisture content after the collapse
Обнаружено, что степень набухания после четырех циклов набухания и сушки при 60 и 110 °С уменьшается в меньшей степени для композиционного материала, чем гидрогеля
Summary
The article deals with the production, sorption and rheological properties of composite materials based on polymer hydrogel and bentonite. Набухание образцов гидрогеля и композиционного материала с бентонитом определяли в воде при различных значениях рН и в водных растворах (концентрация 0,001 и 0,01 М) сульфатов калия, меди, железа (III). Для исследования кинетики коллапса в растворах солей равновесно набухшие в дистиллированной воде образцы гидрогеля и композиционного материала с бентонитом помещали в водный раствор (1 М) сульфата меди.
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