公开(公告)号：US20240368841A1

公开(公告)日：2024-11-07

申请号：US18649107

申请日：2024-04-29

Applicant: Zhejiang University of Science and Technology

Inventor： Lizheng SHA ,  Feiyang ZHANG ,  Daliang GUO ,  Huifang ZHAO ,  Jing LI ,  Yinchao XU

IPC: D21H21/16 ,  C09D5/02 ,  C09D5/16 ,  C09D105/08 ,  C09D191/06 ,  D21H19/12 ,  D21H27/10

Abstract: The method of the present invention specifically comprising following steps: adding a chitosan to an acetic acid solution, heating and stirring until clear, to obtain an acidic chitosan solution; then adding a palm wax and heating a resulting mixture to 80-100° C. with a constant temperature and a high-speed stirring for emulsification for 5-15 minutes; after the emulsification is completed, an obtained emulsion is quickly cooled to a room temperature. The present invention uses a single-layer coating method to prepare waterproof and oil-proof food cardboard, simplifying operation and achieving good waterproof, oil-proof, and antibacterial effects with a lower coating amount, thereby reducing production costs. When a coating amount is 5-10 g/m2, a Cobb60 value can reach 5-9 g/m2, an oil resistance level can reach 11-12 levels, a water contact angle can reach over 130°, and an antibacterial rate can reach over 90%.