高温短时间处理对天然彩色棉色泽的影响

为探究高温焙烘整理条件对天然彩色棉色泽的影响，对高温短时间处理后（150～180℃，2min）天然彩色棉的色泽性能进行了研究。结果表明：无论是天然棕色棉和绿色棉，高温短时间处理都会导致明显的色变，但绿色棉的色变程度要低于棕色棉，这意味着绿色棉色素的高温短时间稳定性要好于棕色棉。酸碱条件都将使高温短时间处理后天然彩色棉的色变增加，碱性条件比酸性条件导致更大的色变。高温条件导致的色变是酸碱不可回复的色变，这表明高温条件使天然彩色棉的色素造成了酸碱不可逆的结构变化。

Effect of short time and high temperature treatment on shade of naturally colored cotton

The effect of short time and high temperature (HTSP) treatment（150－180℃，2min）on the shade of naturally colored cotton was examined for getting a better understanding of the impact of high temperature curing on the shade of the fiber. The results showed that no matter the brown or green cotton (naturally colored), short time high temperature treatment results in significant change of its shade, but the green is less obvious than the brown, which indicates that the coloring matter of the former has better stability in HTSP condition. The acidic or alkali conditions will make the shade change caused by HTSP condition even more serious, and alkali condition has greater impact. The experimental results reveal that the shade change caused by high temperature is dominated by structural change of coloring matter, which can’t be recovered by acidic or alkali conditions.