服用棉织物中的甲醛在不同水介质中的释放

选择防皱整理剂和固色剂,使用常规工艺分别制备防皱整理棉织物和固色棉织物,然后使之分别在不同pH值的水溶液和人工汗液中释放甲醛,考察和比较这2种织物在不同水介质中释放甲醛的规律。结果表明:防皱整理棉织物在pH=8.0的蒸馏水介质中释放的甲醛浓度大于其在pH=5.0的蒸馏水介质中的释放浓度,而固色棉织物则表现出与之相反的释放规律;2种织物在人工汗液中释放浓度都低于它们在蒸馏水中相对应的释放浓度,其原因是人工汗液中的L-组氨酸能够与释放甲醛发生反应。

Release of formaldehyde from apparel cotton fabrics in different aqueous medium

A durable press(DP) agent and a fixing agent were first selected,and the DP finished cotton fabrics and the dyed and fixed cotton fabric were prepared respectively.Formaldehyde release from the two treated cotton fabric samples in acidic,alkaline aqueous solutions and in two artificial sweats were characterized.The results indicated that the DP finished cotton fabric released formaldehyde more easily in the alkaline aqueous solution than in the acidic aqueous solution.On the contrary,the dyed and fixed cotton fabric showed the reversed releasing trend.Moreover,the two fabric samples released low formaldehyde in the artificial sweats than in the aqueous solutions at the same condition because of the reaction of L-histidine from artificial sweats with the release formaldehyde.