방사선에 의한 옻칠표면의 변화
Change of Lacquer Surface by Radiation
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Natural lacquer was cured at room temperature at a relative humidity of 60% at 27°C to obtain a lacquer film. Photolysis of lacquer was investigated by irradiating 1~75 kGy of gamma ray to this lacquer film. No significant changes were observed in the range of 1~10 kGy radiation. As the radiation doses were increased, the white spots were increased in the scanning electron microscope photographs. The increase of the white dots of the lacquer surface shows that the lacquer is degradation by radiation. As a result of IR spectral analysis of the lacquer surface with increasing irradiation dose, there was no significant change in 3,445 cm-1 hydroxide group, 2,900 cm-1 hydrocarbon group, and 993 cm-1 triene group. However, the 1,745 cm-1 carbonyl group was found to increase, and the 1,715 cm-1 unsaturated hydrocarbon group and the 1,463 cm-1 methylene group showed a tendency to decrease.
Abstract
Natural lacquer was cured at room temperature at a relative humidity of 60% at 27°C to obtain a lacquer film. Photolysis of lacquer was investigated by irradiating 1~75 kGy of gamma ray to this lacquer film. No significant changes were observed in the range of 1~10 kGy radiation. As the radiation doses were increased, the white spots were increased in the scanning electron microscope photographs. The increase of the white dots of the lacquer surface shows that the lacquer is degradation by radiation. As a result of IR spectral analysis of the lacquer surface with increasing irradiation dose, there was no significant change in 3,445 cm-1 hydroxide group, 2,900 cm-1 hydrocarbon group, and 993 cm-1 triene group. However, the 1,745 cm-1 carbonyl group was found to increase, and the 1,715 cm-1 unsaturated hydrocarbon group and the 1,463 cm-1 methylene group showed a tendency to decrease.
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