| 초록 |
UV polymer crosslinking has been used in micro scale or patterning. Many previous methods, however, have limitation that they only depend on the concentration of crosslinker. A novel photo-crosslinkable polymer was designed for overcoming that problem. Poly(vinyl alcohol) (PVA) was selected as a backbone polymer because of its excellent mechanical properties and high water absorption. Since benzophenone enables polymers to photo-crosslink, aminobenzophenone should be synthesized to modify the PVA. 4-aminoethoxybenzophenone was easily acquired by mixing 4-hydroxybenzophenone and 2-chloroethylamine in DMSO. Aminobenzophenone could react with hydroxyl group of PVA under the carbonyldiimidazole (CDI) addition. This modified PVA made the process of gel patterning to simplify by adjusting irradiation time. |
