US 11,884,792 B2
Anti-biofouling shape-memory composite aerogel and preparation method
Jingzhe Xue, Xuancheng (CN); Yang Lu, Xuancheng (CN); Hao Xu, Xuancheng (CN); Hanye Xing, Xuancheng (CN); Qian Wang, Xuancheng (CN); Wenshu Wu, Xuancheng (CN); Sheng Chen, Xuancheng (CN); Kangkang Li, Xuancheng (CN); Yaxin Du, Xuancheng (CN); and Zongshun Peng, Xuancheng (CN)
Assigned to Hefei University of Technology, Xuancheng (CN)
Filed by Hefei University of Technology, Xuancheng (CN)
Filed on Apr. 4, 2023, as Appl. No. 18/295,278.
Claims priority of application No. 202210363657.9 (CN), filed on Apr. 7, 2022.
Prior Publication US 2023/0323068 A1, Oct. 12, 2023
Int. Cl. C08J 9/28 (2006.01); C08L 5/08 (2006.01); C08J 9/42 (2006.01); C08K 3/30 (2006.01); C02F 1/14 (2023.01); C02F 103/00 (2006.01); C02F 103/08 (2006.01); C02F 103/34 (2006.01)
CPC C08J 9/283 (2013.01) [C02F 1/14 (2013.01); C08J 9/42 (2013.01); C08K 3/30 (2013.01); C08L 5/08 (2013.01); C02F 2103/007 (2013.01); C02F 2103/08 (2013.01); C02F 2103/34 (2013.01); C02F 2303/20 (2013.01); C08J 2201/0484 (2013.01); C08J 2205/026 (2013.01); C08J 2305/00 (2013.01); C08J 2499/00 (2013.01); C08K 2003/3072 (2013.01)] 7 Claims
OG exemplary drawing
 
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.