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Crosslinking methods of hydrogels and preparation technologies of partial hydrogels. (a) Chemical and physical crosslinking of hydrogels. (b) Modification of alginate by furfurylamine and hydrogel formation by crosslinking with bismaleimide. Reprinted with permission from Ref. [10]. Copyright 2019, Fernando, I. P. S. (c) Schematic diagram of chitosan particle system prepared by emulsification crosslinking method. Reprinted with permission from Ref. [12]. Copyright 2011, Dash, M.
