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.
Swelling, Hydrophilicity, Roughness, and Charge of DHTA and DHIA Films
| % of –OH groups charged atc |
|||||
|---|---|---|---|---|---|
| water uptakea (wt %) | contact angleb,c (deg) | surface roughnessb,c,d (nm) | pH 5.2 | pH 10.6 | |
| DHTA | 8.3 ± 1.4 | 35.3 ± 6.3 | 1.90 | 0 | 7.8 ± 1.1 |
| DHIA | 8.3 ± 1.5 | 32.3 ± 6.7 | 2.44 | 0.20 ± 0.10 | 8.8 ± 2.9 |
Measured using bulk films (10–20 μm thick) of DHTA and DHIA.
Measurements taken at pH 5.2.
Measured on the active layer of TFCs.
RMS roughness of dry active layer surfaces.
