Research Article
Synthesis and Properties of pH-, Thermo-, and Salt-Sensitive Modified Poly(aspartic acid)/Poly(vinyl alcohol) IPN Hydrogel and Its Drug Controlled Release
Figure 5
Swelling ratio of KPAsp, KPAsp/PVA semi-IPN, and KPAsp/PVA IPN hydrogels in distilled water (a) and 0.9 wt% physiological saline (b).
(a) |
(b) |