With excellent biocompatibility

biodegradability

good mechanical properties and excellent barrier properties

poly(vinyl alcohol) membranes are widely used in the fields of antibacterial and bacteriostatic

photoelectric devices

gas barrier

etc

. However

it’s easy to be ignited and will release unsaturated aldehydes and ketones in the combustion process

leading to great safety risks during use

which limits its wide application. Therefore

it needs to suffer flame retardant modification treatment. In recent years

the development of nano-flame retardant materials in PVA flameretardant composite film is outstanding. The flame retardant effect of nano-PVA composite membrane with low load can be significantly improved. The flameretardants with different micro-morphologies and different flame-retardant systems have difference in PVA composites films. Based on the micro-morphology of nano-flame retardant fillers of PVA films and system of flame-retardant

the development and flame-retardant mechanism of PVA composite film are summarized from 2D nanomaterials (metal hydroxide

phosphorus

carbon

ceramic and clay) and non-2D nanomaterials

and the development trend of flame retardancy of PVA composite film is also prospected.