Degradable high-barrier antibacterial film

• Main Authors: CHEN YI, CHEN YING, LIAO XIZHI, LIU JIATING, ZHAO TIAN
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DIFFUSION TREATMENT OF METALLIC MATERIAL; GENERAL PROCESSES OF COMPOUNDING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention relates to a degradable high-barrier antibacterial film, which is formed by compounding three layers of films, including a PVA film at the bottom layer, a silicon oxide film layer at the middle layer and a chitosan modified cross-linked film layer at the outer layer, the three layers are compounded through different processes, the composite film has good mechanical properties, tensile strength and tear strength can reach 54.7 MPa and 204.6 N, and the composite film has good oxygen barrier property, and can be used as a degradable antibacterial film. The oxygen passing rate of the film with the thickness of 0.43 mm is only 27.9 cm < 3 >/(m < 3 >. 24 hr. MPa), and the film can be applied to the packaging field of food, medicine and the like. 本发明涉及一种可降解高阻隔抗菌膜，由三层膜复合而成，包括底层的PVA膜，中间层的氧化硅膜层，外层的壳聚糖改性交联膜层，三层之间通过不同工艺实现复合，复合膜具有良好的力学性能，拉伸强度和撕裂强度可达54.7MPa和204.6N，具有良好的氧气阻隔性，0.43mm厚膜的氧气通过率仅为27.9cm3/（m3·24hr·MPa），该膜可应用于食品、药品等包装领域。