关键词: 马钱苷, 结构修饰, 真丝绸, 染色, 色牢度, 抗菌性

Abstract: In order to develop natural iridoid dyes, Loganin was selected for structure modification and its mechanism was discussed. The effect of the modification product on the dyeing properties of pure silk was studied, the whole process of color reaction was analyzed using UV-vis spectroscopy. The condition of color reaction was determined, and the color fastness and antibacterial properties of the dyed pure silk were tested. The results revealed that the Loganin exhibited good dyeing properties on pure silk after being structurally modified by acylation reaction, and the resulting color product exhibited the maximum characteristic light absorption at 465 nm and 670 nm. Under the conditions that the amount of modified product was 6% of the mass of the pure silk, the pH value was 7.5-8.0, at a dyeing temperature of 35-40 ℃ and the dyeing time lasted 5 h, the dyed pure silk had better color fastness and antibacterial property. The modified product enriched the species of the natural iridoids compounds, broadened the chromatographic range, and demonstrated a good application prospect as a brand-new type of functional dyes used for protein fiber.

Key words: Loganin, structure modification, pure silk, dyeing, color fastness, antibacterial property