표면개시중합법을 이용한 셀룰로스 필터지의 젖음성 조절

초록

The hydrophilic/hydrophobic nature of the cellulose could be tuned by introducing a polymer layer onto the surface using surface initiated polymerization techniques. Initiating groups for the polymerization could be immobilized by reacting 2-bromoisobutyrylbromide with the hydroxyl groups on cellulose. Thereafter, using atom transfer radical polymerization the modified cellulose was grafted with hydrophobic poly(methyl acrylate) (PMA), or with poly(Nisopropylacrylamide) (PNIPAAm) which have been known for having lower critical solution temperature. We characterized the modified surface of cellulose using SEM-EDS and XPS, and FT-IR. The contact angles of the polymer grafted cellulose showed that the hydrophilic nature of cellulose surface was changed to hydrophobic after being grafted with PMA and to temperature dependent hydrophilic/hydrophobic with PNIPAAm.

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