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. 2023 Mar 31;12(7):1481. doi: 10.3390/foods12071481

Scheme 1.

Scheme 1

A schematic representation of the preparation of M-SCT hydrogels. The homogeneous mixture of SA, CS, and STPP was placed in a 5 mL medical syringe. The solution gradually changed to a hydrogel state under an acidic environment, and the hydrogel sheet was coated to prepare M-SCT composite hydrogel with a multilayer SA matrix.