| 초록 |
A fully cellulose-based membrane was fabricated via non-solvent induced phase separation (NIPS) process that blends together cellulose acetate (CA) and cellulose-graft-poly(ε-decalactone) (CgPD) to enhance traditional CA membrane’s flux properties. The effect of blend composition on the resulting membrane’s compatibility, morphology, ultrafiltration performance, and mechanical properties were evaluated in various analyses. Especially, 1H NMR cryoporometry was used to precisely characterize its pore size distribution. CA membranes suffered from low water flux; CA and water exhibited high affinity which retarded coagulation rate forming denser skin layers and low porosity during the phase inversion process. Blending CgPD with CA accelerated the demixing process and resulted in finger-like structures with dense surface layers, enhancing ultrafiltration performance of the CA/CgPD membrane. These results may also contribute to the ongoing efforts to produce renewable bio-based membranes. |
