Lotus seedpods의 색소 특성과 견뢰도 분석
Colorants Characteristics and Fastness Analysis of Lotus Seedpods
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Lotus(Nelumbo nucifera gaertn) is intimate plant to many people that it has clean and noble characteristicsdespite growth in the mud. Especially Lotus seedpods, byproduct of lotus, are rich in oligometric procyanidins and couldbe a new source of procyanidins. Procyanidins, also known as condensed tannins, are a class of polyphenols. In otherwords lotus seedpod contains plenty of tannins. Commonly tannins colorants could increase adsorption and fastness propertiesin fabric dyeing. This study was made to investigate colorants characteristics of lotus seedpod and various colorfastnessproperties of dyed silk fabrics. The wavelength of maximum absorption of lotus seedpod solution appeared at273.5 nm from UV-vis spectrophotometer. From the results of FT-IR spectra measurements, IR absorption band of lotusseedpod colorants appeared at 3415 cm-1, 2900 cm-1 and 1620 cm-1 by tannin structure. And tannin ingredient contentswas the highest at pH 9 and flavonoid at pH 11. Lotus seedpod colorants showed relatively good affinity at pH 3 on silkfabrics and optimum dyeing temperature and time for silk was for 50 min, at 80oC. K/s of Light fastness according to differentwashing method was the highest at process including ironing and ΔE was the lowest. All of fastness(Light·rubbing·laundering·perspiration·dry cleaning) showed excellent results over 4 or 4-5 grades.
Abstract
Lotus(Nelumbo nucifera gaertn) is intimate plant to many people that it has clean and noble characteristicsdespite growth in the mud. Especially Lotus seedpods, byproduct of lotus, are rich in oligometric procyanidins and couldbe a new source of procyanidins. Procyanidins, also known as condensed tannins, are a class of polyphenols. In otherwords lotus seedpod contains plenty of tannins. Commonly tannins colorants could increase adsorption and fastness propertiesin fabric dyeing. This study was made to investigate colorants characteristics of lotus seedpod and various colorfastnessproperties of dyed silk fabrics. The wavelength of maximum absorption of lotus seedpod solution appeared at273.5 nm from UV-vis spectrophotometer. From the results of FT-IR spectra measurements, IR absorption band of lotusseedpod colorants appeared at 3415 cm-1, 2900 cm-1 and 1620 cm-1 by tannin structure. And tannin ingredient contentswas the highest at pH 9 and flavonoid at pH 11. Lotus seedpod colorants showed relatively good affinity at pH 3 on silkfabrics and optimum dyeing temperature and time for silk was for 50 min, at 80oC. K/s of Light fastness according to differentwashing method was the highest at process including ironing and ΔE was the lowest. All of fastness(Light·rubbing·laundering·perspiration·dry cleaning) showed excellent results over 4 or 4-5 grades.
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