紫外线照射对羊毛织物表面理化性能的影响

摘要

The surface chemical composition, hydrophilicity, and microstructure of wool fabrics before and after UV irradiation were characterized by surface property measurements. The results showed that during UV irradiation, cystine, disulfide bonds with hydrophobicity and nonpolar C?C bonds were partially dissociated, and the surface hydroxyls, nitrogen-containing groups, and C?O bonds increased, improving the hydrophilicity of wool fabrics, which was further confirmed by the decreased static water contact angle and increased capillary effect of UV irradiated wool fabrics. Moreover, the surface morphology and crystal structure of wool fibers hardly changed, but the roughness increased slightly in the chemical etching resulting from low-power UV irradiation within short time. Based on the above-described effects induced by UV irradiation on surface physical and chemical properties of wool fabrics, this method is conducive to woolen dyeing and finishing.%利用相关表面性能测试方法对紫外线照射前后羊毛织物的表面化学组成、亲水性和微观结构进行表征.结果表明,紫外线照射过程可能是部分破坏了羊毛织物上具有疏水特性的胱氨酸和二硫键及非极性的C?C键,并同时提高了表面羟基、含N基团和C?O键的含量,使织物的亲水性能得到增强,且在紫外线照射羊毛织物静态水接触角降低、毛效提高的结果中得到证实;在低功率、短时间的处理条件下,紫外线照射羊毛织物引起的化学刻蚀未对纤维表面形貌及结晶区结构造成明显变化,仅略微提升了羊毛织物的粗糙程度.综合紫外线照射对羊毛织物表面理化性能的影响,认为该方法利于毛纺染整加工.