US 12,442,116 B2
Preparation method of a unidirectional moisturizing nanofiber facial mask substrate with asymmetric wettability
Jinlian Hu, Kowloon (HK); Yifan Si, Kowloon (HK); Shuo Shi, Kowloon (HK); and Chunxia Guo, Kowloon (HK)
Assigned to City University of Hong Kong, Kowloon (HK)
Filed by City University of Hong Kong, Kowloon (HK)
Filed on Jul. 18, 2022, as Appl. No. 17/866,632.
Claims priority of application No. 202111020708.X (CN), filed on Sep. 1, 2021.
Prior Publication US 2023/0063352 A1, Mar. 2, 2023
Int. Cl. D04H 1/728 (2012.01); A61K 8/02 (2006.01); A61K 8/19 (2006.01); A61K 8/73 (2006.01); A61K 8/87 (2006.01); D04H 1/4358 (2012.01)
CPC D04H 1/728 (2013.01) [A61K 8/0212 (2013.01); A61K 8/19 (2013.01); A61K 8/731 (2013.01); A61K 8/87 (2013.01); D04H 1/4358 (2013.01); A61K 2800/413 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A preparation method of a unidirectional moisturizing nanofiber facial mask substrate with asymmetric wettability, comprising the following steps:
preparing a superhydrophilic fiber membrane on a substrate by electrospinning;
preparing a hydrophobic fiber membrane by electrospinning on a lateral surface of the superhydrophilic electrospun fiber membrane away from the substrate, thereby forming a double-layered membrane; and
removing the substrate from the double-layered membrane, and
drying the double-layered membrane after removing the substrate from the double-layered membrane to obtain the unidirectional moisturizing nanofiber facial mask substrate with asymmetric wettability.