High-strength polysaccharide aerogel microsphere, and preparation method and application thereof

The invention discloses a high-strength polysaccharide aerogel microsphere, and a preparation method of the high-strength polysaccharide aerogel microsphere, which are mainly used in the field of chromatographic separation. According to the preparation method, firstly a difunctional cross-linking agent is used to modify a polysaccharide material, then the polysaccharide material is mixed with a material not modified, and the mixture is emulsified into a sphere, and activated at the later stage to achieve crosslinking in the microsphere. The modified polysaccharide chain forms a covalent cross-linking bond in an aerogel fiber bundle and between the aerogel fiber bundles, so that the mechanical strength of the aerogel microsphere is greatly improved; the polysaccharide chain not modified contains a large quantity of hydroxide radicals so as to be good for the formation of a hydrogen bond in the gelation process and play a role of skeleton supporting, then a macropore network structure formed through aerogel sol