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. Author manuscript; available in PMC: 2021 Sep 1.
Published in final edited form as: Small. 2020 Jul 30;16(35):e2002931. doi: 10.1002/smll.202002931

Figure 6.

Figure 6.

Gelation mechanism between sodium alginate and chitosan at acidic pH; Gelatin and chitosan can be used with various chain length ranging from oligomer to high molecular weight polymeric chains in this method of crosslinking. A) Alginate used as the main polymeric chain and interacted with chitosan oligomers, B) Chitosan used as the main polymeric chain and interacted with alginate oligomers. Reproduced from Khong et al. [171], with permission from American Chemical Society, 2013. C) Schematic illustration of interactions between silk fibroin and clay (MMT) through ion-dipole bonding and electrostatic attraction at above and below the isoelectric point Reproduced from Dang et al. [172], with permission from American Chemical Society, 2010.