Akademik Veri Yönetim Sistemi
2. INTERNATIONAL MEDITERRANEAN SCIENTIFIC RESEARCH AND INNOVATION CONGRESS, Girne, Kıbrıs (Kktc), 30 - 31 Temmuz 2022, ss.774-779
In this study Sodium Alginate (NaAlg)
membranes containing magnetic nanoparticules (Fe3O4) that
could be prepared in the separation of N,N-Dimethylformamide (DMF) from DMF/H2O
solutions at Vapor Permeation (VP) conditions. In the VP method, the membrane
is in contact with the steam of the feed mixture. In this way, problems such as
swelling or shrinkage of the membrane in contact with the solution mixtures
occurring in the pervaporation process can be avoided and consequently improved
membrane performance can be expected. DMF is an effective solvent in
pharmaceutics, in the development and production of pesticides and in the
manufacture of adhesives, synthetic leathers, films and surface coatings and it
is used especially in the production of acrylic fibers and plastics. Fe3O4
is well-known magnetic material but these nanoparticles have some limitations.
They tend to aggregate because of their strong dipole-dipole attractions
between particles. To solve this problem, these particles have been modified by
synthetic and natural polymers. For this purpose, in this study NaAlg has been
used and crosslinked with CaCl2. In the VP process the performance
of the process conditions, such as amount of the Fe3O4,
DMF composition, process temperature and membrane thickness were investigated.
The XRD patterns of Fe3O4 and NaAlg membranes containing
Fe3O4 were obtained using diffractometer. While
increasing the process temperature the separation factors decreased and
permeation rates increased. The highest separation factor was obtained as 72 in
VP process for 90 wt% DMF-water solution.