Ultrafiltration membranes from PVDF/PMMA blends
SP Nunes, KV Peinemann - Journal of Membrane Science, 1992 - Elsevier
Journal of Membrane Science, 1992•Elsevier
Asymmetric membranes for ultrafiltration were obtained from PVDF/PMMA blends. Addition
of 1% PMMA to the casting solution increases the water permeability 14-fold without loss of
retention. Pore size distribution, evaluated by a modified bubble point test, showed a large
increase in number of pores with size between 10 and 30 nm. The addition of PMMA also
increases the size of finger-like cavities as shown by scanning electron microscopy.
of 1% PMMA to the casting solution increases the water permeability 14-fold without loss of
retention. Pore size distribution, evaluated by a modified bubble point test, showed a large
increase in number of pores with size between 10 and 30 nm. The addition of PMMA also
increases the size of finger-like cavities as shown by scanning electron microscopy.
Abstract
Asymmetric membranes for ultrafiltration were obtained from PVDF/PMMA blends. Addition of 1% PMMA to the casting solution increases the water permeability 14-fold without loss of retention. Pore size distribution, evaluated by a modified bubble point test, showed a large increase in number of pores with size between 10 and 30 nm. The addition of PMMA also increases the size of finger-like cavities as shown by scanning electron microscopy.
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