Poly(vinyl alcohol) (PVA) is a typical water-soluble polyhydroxy
polymer with high hydrophilicity and good biocompatibility.1 Its
good chemical resistance, physical properties and biodegradability
have recommended its broad application as a paper coating
and textile sizing agent, adhesive and drug carrier.2,3 Further, the
excellent barrier properties of PVA toward oxygen and carbon
dioxide have led to its use in food packaging applications