Akademska digitalna zbirka SLovenije - logo
VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Nanofiltration membranes modified with alkoxysilanes : surface characterization using zeta-potential
    Bauman, Maja ...
    The characterization of nanofiltration (NF) membranes is necessary for predicting their performance under different operating conditions, and for optimizing the membrane-separation process. A ... thin-film composite (TFC) polymer membrane for nanofiltration, modified with tri- and tetra-alkoxysilanes, was produced using a sol-gel procedure. The surface charges of the modified membranes were determined at different pHs by means of the zeta-potential. The streaming current was measured for a zeta-potential analysis of the flat-sheet membranes. Knowledge of the zeta-potential is essential for designing and operating membrane processes, and its measurement provides the key to understanding the control of charge-related phenomena. The zeta-potential of modified membranes is distinct from that of an untreated membrane. The isoelectric point was found to be at a higher pH after a treatment with any of the alkoxysilanes. The surfaces of the modified membranes showed an amphoteric behaviour. The homogeneity and stability of the treatment were assessed by a repeated zeta-potential analysis of the same and different membrane samples.
    Vir: Colloids and surfaces. A, Physicochemical and Engineering Aspects. - ISSN 0927-7757 (Vol. 422, 5. Apr. 2013, str. 110-117)
    Vrsta gradiva - članek, sestavni del
    Leto - 2013
    Jezik - angleški
    COBISS.SI-ID - 16656662
    DOI

Vnos na polico