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Cover Image, Volume 58, Issue 4
Publication year - 2020
Publication title -
journal of polymer science
Language(s) - English
Resource type - Reports
eISSN - 2642-4169
pISSN - 2642-4150
DOI - 10.1002/pol.20200057
Subject(s) - cover (algebra) , bar (unit) , membrane , polyvinylpyrrolidone , volume (thermodynamics) , casting , materials science , crystallography , physics , polymer science , chemistry , polymer chemistry , composite material , engineering , mechanical engineering , biochemistry , quantum mechanics , meteorology
As seen in the cover SEM images from the work of Van Horn and colleagues reported on page 589, morphologies of macropores in polyvinylidene difluoride (PVDF) membranes change remarkably with addition of an additive in the casting solution. Having 0.0, 0.5, 1.0, and 2.0 wt % polyvinylpyrrolidone (PVP) in the casting, followed by extraction, leads to the changes seen in the first four membranes shown (from top; black bar = 10 μm). Further amounts of PVP lead to even larger pore structures (4.0 and 5.0 wt%; from left; white bar = 20 μm). In contrast, liquid flow, thermal, x‐ray, and positron techniques probed the microstructures of these membranes. (DOI: 10.1002/pol.20190031 ).