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%.

公开(公告)号：US20230340727A1

公开(公告)日：2023-10-26

申请号：US18305311

申请日：2023-04-21

Applicant: Zhejiang University of Science and Technology

Inventor： Huifang ZHAO ,  Daliang GUO ,  Chian FANG ,  Shouyi HAN ,  Yike HUANG ,  Liangyu HUANG ,  Gaorong HU ,  Yuechen ZHOU ,  Zhiyuan TU

IPC: D21F11/00 ,  D21H13/02 ,  D21H27/10 ,  D21D1/02

CPC classification number: D21F11/00 ,  D21D1/02 ,  D21H13/02 ,  D21H27/10

Abstract: Disclosed is an environmentally-friendly method for enhancing mechanical properties of a high antibacterial nano dialysis paper for medical protection, includes following steps: a, preparing pulp components, and taking 40-60 parts of hardwood pulp, 10-20 parts of polyvinyl alcohol fiber, 30-50 parts of softwood pulp, 10-20 parts of cellulose fiber by mass; b, putting the hardwood pulp, the polyvinyl alcohol fiber, the softwood pulp and the cellulose fiber into a beater for beating to make a pulp, and then adding modified chitosan accounting for 1-5% of a weight of the pulp into the pulp, and defibering for 10-20 minutes at a rotating speed of 1500-2000 revolutions per minute in a defibrator; and c, carrying out papermaking with the pulp after defibering to form a dialysis paper finished product.