フッ素樹脂の光化学的表面改質 : トリメチルアルミによる脱フッ素反応と親油基の発現

概要

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Surface of fluorocarbon resin was photochemically modified into oleophilic property by using an ArF excimer laser light (193nm) and an gaseous Al(CH_3)_3. Photo-excited fluorine atoms of the resin surface were pulled out by aluminium atoms which were photodissociated from A1(CH_3)_3. On the other hand, dangling bonds of carbon atoms in the defluorinated surface were substituted by CH_3 radicals which were also photodissociated. By these reactions, photochemical substitution of CH_3 radicals takes place in the surface and the oleophilic property of the surface was successfully prepared. The oleophilic property was estimated by the measurement of the contact angle with benzene, and then the minimum contact angle of about 0 degree was achieved. Depletion of fluorine atoms and substitution of CH_3 radicals were confirmed by the XPS and the ATR-FTIR measurement. Chemical stability of the surface in H_2SO_4 or NaOH water solution were demonstrated.
東海大学の論文