Figure 4: Strength evolution of CS LiOH-urea system in the entire gelation process.
From: Gelation process visualized by aggregation-induced emission fluorogens

(a) Evolution of storage modulus (G’) of CS LiOH-urea solution with time; the solutions were cured at marked temperatures. (b) Evolution of compression stress of CS LiOH-urea gel with different rinse time. (c,d) Relation between gelation behaviour and the concentration of LiOH (c) and the concentration of urea (d).