含偶氮染料-VD的液体洗涤剂预处理织物时色差风险评估

Risk Assessment of Chromatic Aberration of Fabrics Pretreated by Liquid Detergent Containing Azo Dye-VD

家用洗涤剂中添加偶氮染料-VD可增白织物,然而用于洗前局部预处理时则会在织物上产生色差留下暗影,影响织物外观。文章研究使用该家用洗涤剂预处理对织物洗后的色差风险,分析织物纤维成分、洗涤剂预处理时间与偶氮染料-VD浓度与织物色差变化的规律,并进行机理分析。结果表明,使用含偶氮染料-VD的洗涤剂预处理织物时,1/3以上织物会在预处理处产生较明显的色差;纤维素纤维类织物和丝织物更易产生色差;预处理时间越长,色差越明显;预处理时偶氮染料-VD会上染织物,但并不是织物产生色差的唯一原因。研究成果将为偶氮染料-VD的合理使用提供依据。

Adding azo dye-VD to household detergent can whiten fabrics, but will cause chromatic aberration and leave shadow on fabrics while used for local pretreatment before washing, which will influence the appearance of fabrics. This paper studies the risk of chromatic aberration of using this household deter- gent to pretreat fabrics, analyzes the rule of fiber composition of fabrics, pretreatment time with detergent and azo dye-VD concentration and chromatic aberration change of fabrics and conducts mechanism analysis. The result shows that over 1/3 fabrics will have apparent chromatic aberration in the part subject to pretreatment with detergent containing azo dye-VD; cellulosic fiber fabrics and silk fabrics are easier to have chromatic aberration; the longer the pretreatment time, the more apparent the chromatic aberration; azo dye-VD will dye fabrics during pretreatment, but is not the only reason of chromatic aberration of fabrics. The research result will provide theoretical basis for the development of washing assistant in household detergent and provide basis for reasonable use of azo dye-VD.