Patent ID: 11884792
Assignee: HEFEI UNIVERSITY OF TECHNOLOGY
Field: Environmental technology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. An anti-biofouling shape-memory composite aerogel, comprising a unidirectional chitosan aerogel channel, a plant polyphenol coating, and a polyphenol/iron ion chelate, wherein the plant polyphenol coating is evenly distributed on an inner wall of the unidirectional chitosan aerogel channel, and the polyphenol/iron ion chelate is located at a top end of the unidirectional chitosan aerogel channel; wherein the anti-biofouling shape-memory composite aerogel is prepared by and
a method comprising the following steps:
S1: preparation of a biomimetic chitosan aerogel: pouring a chitosan solution into a polystyrene mold, conducting freezing by unidirectional freeze casting, and then freeze-drying to obtain an original chitosan aerogel; washing the original chitosan aerogel with a methanol solution containing sodium hydroxide and a tert-butanol solution in sequence, and freeze-drying again to obtain the biomimetic chitosan aerogel; and
S2: preparation of a biomimetic chitosan-tannic acid (TA)-iron composite aerogel: preparing a TA-aminopropyltriethoxysilane (APTES) solution, immersing the biomimetic chitosan aerogel in the TA-APTES solution to adsorb TA molecules through a compression-release cycle and hence obtain a biomimetic chitosan-TA composite aerogel; immersing a top end of the biomimetic chitosan-TA composite aerogel in a ferric sulfate solution to form a TA-Fe photothermal layer, washing with deionized water, and freeze-drying to obtain the biomimetic chitosan-TA-iron composite aerogel.