| 초록 |
Polyvinylidene fluoride (PVDF) membrane is the most popular membranes for for water treatment due its excellent chlorine resistance, good mechanical properties and thermal stability. However, fouling and nonspecific protein adsorption deteriorated the membrane performance due to its low surface energy. In this study, surface modification of PVDF membrane was performed by thermally induced graft-copolymerization of acrylic acid (AA). Depending upon the initiator application, hydrophilization process can be classified as two different grafting modes; ‘one-stage’ and ‘two-stage’ grafting. Hydrophilization of membrane at surface as well as at the inside of the pore was conducted by suction mode for monomer solution application. The effects of several process parameters such as monomer and initiator concentrations, grafting time were investigated for the optimization of process. Pore size variation of the membrane by thermal grafting was characterized by permporosimetry. |
