2.2. Preparation of gelatin-CNC hydrogels
CNCs were extracted from rice husk fibers by acid hydrolysis using sulfuric acid.
We followed the preparation and characterization of CNCs reported in a previously published study (Ooi et al., 2015).
CNCs were first homogenized using homogenizer Ultra Turrax model T25 Digital, Ika to ensure that they are dispersed uniformly.
Gelatin was added to the CNC suspension, and then heated and stirred on a hot plate at 55 °C for 1 hour.