Patents by Inventor Yifan Si

Yifan Si has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11998623
    Abstract: A water-soluble unidirectional moisture transport traditional Chinese medicine facial mask and a preparation method thereof. The facial mask includes a facial mask substrate and a facial mask effective ingredient layer, wherein a lateral surface of the facial mask substrate is a hydrophobic surface, and the other lateral surface is a superhydrophilic surface; the facial mask effective ingredient layer is loaded to the superhydrophilic surface, in which facial mask effective ingredients include a traditional Chinese medicine colloid. In use, by simply spraying water, the effective ingredients such as the traditional Chinese medicine on the surface can be quickly dissolved to exert effects. Its hydrophobic layer can be kept dry, which not only delays volatilization of liquid and prolongs the effective time, but also is easy to operate and is clean and hygienic. The present invention has a simple preparation method, is non-harmful and non-toxic, low-carbon and environmentally friendly.
    Type: Grant
    Filed: July 29, 2022
    Date of Patent: June 4, 2024
    Assignee: City University of Hong Kong
    Inventors: Jinlian Hu, Yifan Si, Shuo Shi, Chunxia Guo
  • Publication number: 20230304191
    Abstract: The invention provides an enhanced electrospun film made from polyvinylidene fluoride (PVDF) and at least one low-melting-point polymer in a ratio of 99.9:0.1-90:10 by weight, and the low-melting-point polymer having a melting point lower than the polyvinylidene fluoride and a softening point in the range of 110-140 C°. The enhanced electrospun film exhibits excellent mechanical properties, higher moisture permeability and hydrostatic pressure resistance. The invention further provides a method for manufacturing the enhanced PVDF electrospun film, and use of the enhanced PVDF electrospun film in preparing a waterproof and moisture permeable product.
    Type: Application
    Filed: August 30, 2022
    Publication date: September 28, 2023
    Inventors: Jinlian HU, Shuo SHI, Yifan SI, Siu Wah WONG, Muk Fung YUEN
  • Publication number: 20230111046
    Abstract: A water-soluble unidirectional moisture transport traditional Chinese medicine facial mask and a preparation method thereof. The facial mask includes a facial mask substrate and a facial mask effective ingredient layer, wherein a lateral surface of the facial mask substrate is a hydrophobic surface, and the other lateral surface is a superhydrophilic surface; the facial mask effective ingredient layer is loaded to the superhydrophilic surface, in which facial mask effective ingredients include a traditional Chinese medicine colloid. In use, by simply spraying water, the effective ingredients such as the traditional Chinese medicine on the surface can be quickly dissolved to exert effects. Its hydrophobic layer can be kept dry, which not only delays volatilization of liquid and prolongs the effective time, but also is easy to operate and is clean and hygienic. The present invention has a simple preparation method, is non-harmful and non-toxic, low-carbon and environmentally friendly.
    Type: Application
    Filed: July 29, 2022
    Publication date: April 13, 2023
    Inventors: Jinlian Hu, Yifan Si, Shuo Shi, Chunxia Guo
  • Publication number: 20230063352
    Abstract: The present invention discloses a unidirectional moisturizing nanofiber facial mask substrate with asymmetric wettability and preparation thereof. The preparation includes: preparing a superhydrophilic electrospun fiber membrane on a substrate by electrospinning; preparing a hydrophobic electrospun fiber membrane by electrospinning on a lateral surface of the superhydrophilic electrospun fiber membrane away from the substrate to form a double-layered membrane; and removing the substrate, and drying the double-layered membrane to obtain the asymmetric unidirectional moisturizing facial mask substrate with one side being superhydrophilic and the other side being hydrophobic. The superhydrophilic layer can absorb a nutrient solution and be applied to the skin surface, while the hydrophobic layer can keep itself dry, reduce the consumption of the nutrient solution and inhibit volatilization of the nutrient solution.
    Type: Application
    Filed: July 18, 2022
    Publication date: March 2, 2023
    Inventors: Jinlian Hu, Yifan Si, Shuo Shi, Chunxia Guo