人体皮脂组分角鲨烯污化棉织物的老化黄变性能

Aging and yellowing properties of squalene-soiled cotton fabrics

为研究纺织品老化黄变的主要原因,采用分光光度电子测色配色仪对人体皮脂组分角鲨烯污化的纯棉织物在各种老化条件(老化温度、湿度、光照强度和环境氧含量)下的黄变程度进行了系统研究,应用傅里叶变换红外光谱(FT-IR)和场发射扫描电镜(SEM)对角鲨烯在老化过程中的结构变化及其与纯棉基质的结合状况进行了研究。结果表明:随着老化环境中温度、湿度、光照强度和氧含量的增加,织物的老化黄变程度加剧;老化前后角鲨烯的化学结构发生了明显变化,老化产物含有羟基及共轭羰基基团;角鲨烯油污多以包覆纤维及填覆纤维间凹陷的形式结合于纤维表面。

Squalene from human sebum is the major source of yellowing and aging of clothing and household textiles. In this study,the yellowing degrees of the squalene-soiled fabrics aged under various aging conditions（ temperature,humidity,light intensity,ambient oxygen content,etc.） were studied.The yellowing degrees of squalene-soiled / aged fabrics were measured by colorimetric spectrophotometer.The chemical changes of squalene and the surface morphology of squalene-soiled / aged fabric were examined with Fourier transform infrared spectroscopy（ FT-IR） and the field emission scanning electron microscopy（ SEM）. The results showed that,with increase in the temperature,humidity,light intensity and oxygen content of the aging environment,the yellowing level of squalene-soiled fabrics increased.The chemical structure of squalene changed significantly after aging,and the aged product contained hydroxyl group and carbonyl group. The vast majority of squalene padded onto the cotton fabrics was coated on the fiber surfaces or filled in the dents among fibers.