Morphology and transport properties of membranes obtained by coagulation of cellulose solutions in isobutanolстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 3 марта 2021 г.
Аннотация:The evolution of structural-morphological transformations of cellulose membranes obtained from solutions in Nmethylmorpholine-N-oxide through various temperature isobutanol coagulation baths and subsequent treatment
with water and their transport properties were studied. Using SEM, it was found that during coagulation in water
and drying of the membranes, a uniform monolithic microheterogeneous texture was formed. The replacement of
an aqueous precipitation bath with an isobutanol one leads to the formation of a porous structure with wide pore
size and shape distributions. With an increase in precipitant temperature in the as-formed membrane, transverse
tunnel cavities are formed with respect to the membrane-forming axis, which collapses when the membrane is
washed with water, forming a dense texture with a non-uniform membrane volume. The mechanical properties
of the obtained membranes were determined and a mechanism is proposed that allows their values to be
correlated with structural-morphological and transport properties.