COMPOSITE BARRIER FILM AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2020/077551

A1

Disclosed is a composite barrier film, comprising an inner film (1) and an outer film (3), wherein the inner film (1) is a first electrospun film, the outer film (3) comprises a second electrospun film (4) and a casting film (2), the second electrospun film (4) is placed in a treatment solution to form the casting film (2), the material of the first or second electrospun film (4) comprises silk fibroin and/or a biocompatible polymer, and the material of the casting film (2) is silk fibroin. The preparation method for the composite barrier film involves: dissolving degummed silk fibroin and a biocompatible polymer in an organic solvent to obtain an electrostatic spinning solution, and then subjecting same to electrostatic spinning to obtain the first or second electrospun film (4); placing the second electrospun film (4) into a treatment solution, and forming a film by means of a casting method to obtain the outer film (3), wherein the treatment solution is an aqueous silk fibroin solution; and using the first electrospun film as the inner film (1), and compounding the outer film (3) and the inner film (1) to obtain the composite barrier film.

ZHAO HUIJIN (CN)
WANG LINBO (CN)
JIANG ZIYI (CN)

PCT/CN2018/110558

April 23, 2020

October 17, 2018

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NANTONG TEXTILE AND SILK INDUSTRIAL TECH RESEARCH INSTITUTE (CN)
UNIV SOOCHOW (CN)

A61L27/44; B32B9/04; D01F8/02

WO2018033744A1

2018-02-22

CN104474589A	2015-04-01
CN101474430A	2009-07-08
CN107693845A	2018-02-16
CN106039402A	2016-10-26
CN107349473A	2017-11-17

CENTRAL SOUTH WELL INTELLECTUAL PROPERTY OFFICE (CN)

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