egenerated cellulose blend membranes were prepared by coagulating a mixed solution of cellulose cuoxam (I) and aqueous polyvinyl alcohol (Ⅱ). SEM results showed that the phase separation on the mixing were seriously formed when the Ⅱ-content was higher than 8% by volume. But

when the Ⅱ-contCnt of blend was smaller than 5%

1 and Ⅱ are miscible

and the degree of crystallinity

tensile strength

tear strength

breaking elongation and thermostability of the blend membranes were superior to those of membrane from pure cellulose cuoxam. In addi-tion

the mean pore diameter

ethanol permeability and the transmembrane flows of water obtained by using a flow rate and ultrafiltration methods suggeted that the pore properties of the blend membranes were almost not variabe. In conclu-sion

the mechanical properties of blend membranes from regenerated cellu-lose / 5% polyvinyl alcohol were improved

and the blend membranes keep biodegradability yet.