海藻酸钠／聚乙烯醇共混膜的制备及表征

Preparation,properties and characterization of the blend film of sodium alginate and polyvinyl alcohol

用溶液共混法制备海藻酸钠/聚乙烯醇(SA/PVA)共混膜,并对其进行了IR、DSC表征和吸水率、透气率、力学性能等测定。结果表明,在这种由两种可生物降解的高聚物共混而成的共混膜中,PVA与SA分子链间有一定的相互作用,相容性好;共混膜有较高的抗水性和较好的综合力学性能。

The blend film Of sodium alginate （SA）/poly （vinyl alcohol） （PVA） has been prepared. Infrared spectroscopy （IR） and DSC has been applied to research the film and water absorption, air permeability,mechanical properties of the film have been tested. The results indicated there was some strong interaction between PVA and sodium alginate molecule in the biodegradable blend films, which showed that introduction of sodium alginate was helpful to improve mechanical property and decrease water absorption of PVA.