Elsevier

Desalination

Volume 129, Issue 2, 10 July 2000, Pages 163-172
Desalination

Atomic force microscopy studies of nanofiltration membranes: surface morphology, pore size distribution and adhesion

https://doi.org/10.1016/S0011-9164(00)00058-8Get rights and content

Abstract

Atomic force microscopy has been used to quantify surface morphology, pore size distributions and particle adhesion for three nanofiltration membranes. It was found that the mean pore diameters were ∼ 1 nm and that the relative sizes corresponded to measured separation performance. Adhesion of polystyrene particles was greater than that of silica particles, due partly to greater electrostatic double-layer repulsion between the negatively charged membranes and silica, and partly to short-range repulsive interactions associated with the silica surface. It is likely that short-range repulsive interactions are also responsible for the low adhesion of the negatively charged silica particles even at the membrane which was positively charged.

References (32)

  • P. Dietz et al.

    J. Membr. Sci.

    (1992)
  • A. Bessières et al.

    J. Membr. Sci.

    (1996)
  • L. Palacio et al.

    Thin Solid Films

    (1999)
  • W.R. Bowen et al.

    J. Membr. Sci.

    (1997)
  • W.R. Bowen et al.

    J. Membr. Sci.

    (1998)
  • W.R. Bowen et al.

    Trans. IChemE

    (1998)
  • S. Singh et al.

    J. Membr. Sci.

    (1998)
  • C. Combe et al.

    J. Membr. Sci.

    (1999)
  • G. Toikka et al.

    J. Colloid Interface Sci.

    (1996)
  • P.B. Chowdhury et al.

    Coll. Surf. A

    (1998)
  • W.R. Bowen et al.

    Colloids and Surfaces A

    (1999)
  • A. Grabbe et al.

    J. Colloid Interface Sci.

    (1993)
  • G. Vigil et al.

    J. Colloid Interface Sci.

    (1994)
  • J.Y. Walz

    Adv. Colloid Interface Sci.

    (1998)
  • W.R. Bowen et al.

    AIChEJ

    (1998)
  • W.R. Bowen et al.

    Desalination

    (1998)
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