Abstract
Solute permeability and reflection coefficients (σ) through hollow-fiber membranes were measured for cellulose and poly(methyl metharrylate) (PMMA) membranes. The dialysis apparatus used was a U-type hollow fiber unit which was loosely bundled and set in a perfectly mixed reservoir with dialyzate flowing perpendicularly to the hollow fibers. Mass transfer resistance across the boundary layer outside the fibers was small at low flow velocity, so solute permeability could be measured accurately. The mass transfer correlation obtained wasSh = 0.38Reout0.72Sc1/3 Ultrafiltration experiments were performed for the case of flow within the fibers, in order to determine actual rejections and σ values. The relationship between σ and the molecular weights of polyethylene glycols (PEGs) in the cellulose membrane approached that of inulin and other solutes when the amount of hydrated molecules of water to PEG units was taken into account. Negative σ values were observed in PMMA membrane for PEGs #1000–#6000.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
