Metal phthalocyanine derivatives exhibit highly redox properties. However, there are few reports on practical applications using their redox ability. The purpose of this study is the utilization of the redox properties of metal phthalocyanine derivatives. To achieve the purpose, we prepared redox resins which synthesized metal phthalocyanine tetrasulfonic acids were fixed onto ion-exchange resins. Fixation of metal phthalocyanine tetrasulfonic acids onto ion-exchange resin was found to be the Freundlich type. The redox ability of the resins were examined in the reaction between metal phthalocyanine tetrasulfonic acid fixed ion-exchange resin and hydrogen, peroxide. The ability we found to be different depending on the central metal in metal phthalocyanine tetrasulfonic acid.
For a functionalization of leather, low temperature plasma treatment for leather was carried out with tetrafluoromethane (CF4), hexafluoroethane (C2F6) and perfluoropropane (C3F8). Plasma-treated leather surfaces were analyzed with XPS and FT-IR and the quantitative analysis of fluorine content in leather was done by a colorimetry. Fluorine content was also measured in leather and in extracted water after the water extraction test. In those analysis, fluorocarbon polymer was detected on leather surface treated with each fluorocarbon gas plasma. The fluorine content in leather increased with plasma treatment time, and the distribution of fluorine content in leather varied with fluorocarbon gas. In the water extraction test, the fluorine content in CF4 treated leather decreased gradually with extraction time, but the decrease stopped after 25-50h of the extraction for C2F6 and C3F8 treated leather. The fungal resistance was increased in all fluorocarbon plasma treated leather even after the water extraction test.
Polystyrene particles with an average diameter of 15gm were uniformly coated with a SiO2 thin film. Prior to the coating, the surface of polystyrene was activated by oxygen-microwaveplasma treatment. After the particles were dispersed into an ethanol solution of tetraethoxysilane with a small amount of NH3 water as a base catalyst, a 3 hoars' stirring at room temperatu re accomplished the sol-gel SiO2 coating. XPS spectra of the particles treated with oxygen-microwave plasma indicated the introduction of polar groups such as hydroxyl and carboxyl ones on the surface. In diffuse reflectance FT-IR spectra of the particle finally obtained, two absorption peaks assigned to Si-O-Si and Si-OH stretching vibrations were observed at 1100 and 950cm-1, respectively. EPMA and TEM analyses of the cross section of the particle clearly demonstrated that the polystyrene particles with oxygen-plasma pretreatment were homogeneously covered with a SiO2 film having a thickness of ca. 120 nm, while the particles without pretreatment were heterogeneously covered with SiO2 particles.