Method for preparing hydrogel comprising chitosan and negatively charged polyelectrolyte and cellular porous material obtained from said hydrogel

摘要

The present invention relates to a method for producing a hydrogel,Continuously include the following steps: A powder of at least one anionic polymer (A) and an amine functional group (-NH₂A first step (i) of providing at least one chitosan (B) powder comprising at least one chitosan (B) A second step (ii) consisting of at least dry mixing the powder (A) obtained from the first step and the powder (B) to form a powder mixture, The powder mixture obtained from the second step is suspended in an aqueous medium having a pH that makes it possible to dissolve the anionic polymer (A) without dissolving the chitosan (B) A third step (iii) A fourth step (iv) of adding an acid to the suspension obtained from the third step to form the hydrogel, Wherein the third step (iii) and the fourth step (iv) comprise at least one compound (C) comprising at least one hexose unit or a unit derived from a hexose and / or at least one compound (C) (V) a fifth mixing step (v) comprising mixing an acidified aqueous medium containing an acid salt with the mixture comprising at least the (A) powder and the (B) powder obtained from the second step (ii) In the presence of a catalyst.