Figure 3.
SEM images, the histogram for diameter distribution, and contact angles of PVDF-PEI ENs for different solvent ratios of DMF/Ac (15% (w/v) PVDF solution in DMF/Ac and 15% (w/v) PEI in DMF; PVDF/PEI ratio is 8:2 (v/v)).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.