Stimuli-Sensitive Hydrogel Based on N-Isopropylacrylamide and Itaconic Acid for Entrapment and Controlled Release of Candida rugosa Lipase under Mild Conditions
Figure 1
FT-IR spectra of hydrogels: (a) spectra of PNiPAAm, NiPAAm, and MBA; (b) spectra of hydrogels with 2.0 wt.% of MBA ((A) 85/15/2; (B) 90/10/2; (C) 95/5/2; (D) 100/0/2); and (c) spectra of hydrogels with 4.0 wt.% of MBA ((E) 85/15/4; (F) 90/10/4; (G) 95/5/4; (H) 100/0/4). The first two numbers in the sample labels correspond to the comonomer NiPAAm/IA weight ratio, and the third one corresponds to the concentration of the crosslinking agent, MBA.
