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Can I read Macrovoid Growth During Polymer Membrane Casting on EtoBox?
Macrovoid Growth During Polymer Membrane Casting by Vivek P. Khare; Alan R. Greenberg; Jeremiah Zartman; William B. Krantz; Paul Todd is a Environmental Science article available to read on EtoBox.
What is Macrovoid Growth During Polymer Membrane Casting about?
The Solutocapillary Convection (SC) hypothesis contends that macrovoid (MV) growth in dry-cast membranes is governed by a solutal-Marangoni convection-induced force caused by the rapid evaporation of volatile solvent from the liquid/gas interface, a viscous drag force, and a gravity-induced buoyancy force. Two different sets of experiments using the cellulose acetate-acetone-water system were conducted to test the SC hypothesis. Membranes were cast aboard a KC-135 aircraft that enabled short periods of microgravity (-0-g) as well as 2-g conditions. The studied process variables included the solvent/non-solvent (S:NS) ratio, surface tension, and the magnitude of the body force (buoyancy). SEM analysis of the resulting membrane morphologies indicated that the MV morphology was strongly influenced by the S:NS ratio. However, dependence of MV size and number density on the buoyancy force could not be established. In the second set of experiments, videomicroscopy flow-visualization (VMFV) was utilized to measure fluid velocities at the MV/casting-solution interface and in the bulk solution. The magnitude of the solutocapillary convection was controlled via surfactant additions. A compar
Who reads Macrovoid Growth During Polymer Membrane Casting?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Vivek P. Khare; Alan R. Greenberg; Jeremiah Zartman; William B. Krantz; Paul Todd
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0011-9164)
- Published
- 2002
- Language
- EN
- Field
- Environmental Science (Physical Sciences)