PVA (polyvinyl alcohol) film modified by one-step reaction extrusion method as well as preparation method and application of PVA film

• Main Authors: LIU FENGSONG, XIAO XINGLONG
• Format: Patent
• Language: Chinese; English
• Published: 27.05.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DERIVATIVES THEREOF; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; POLYSACCHARIDES; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The invention belongs to the technical field of polyvinyl alcohol (PVA) antibacterial films, and discloses a PVA film modified by a one-step reaction extrusion method and a preparation method and application thereof, the PVA film comprises the following raw materials by mass: 10-30 parts of PVA, 5-15 parts of chitosan, 3-5 parts of an alkyl compound, 5-15 parts of halogenated epoxypropane, 10-20 parts of an isopropanol solution, 5-15 parts of a sodium hydroxide solution, 3-5 parts of a plasticizer, and 20-60 parts of water. The preparation method comprises the following steps: firstly, carrying out nucleophilic substitution reaction through a double-screw reaction extruder to obtain quaternary ammonium salt modified chitosan, conveying the quaternary ammonium salt modified chitosan to a single-screw extruder for plasticizing and uniformly mixing, extruding the quaternary ammonium salt modified chitosan through a machine head at high temperature and high pressure to form a film, and finally, carrying out vacuu