涤/棉混纺织物改性及其活性染料一浴法染色

Modification of polyester/cotton blended fabric and one-bath dyeing with reactive dyes

针对活性染料对涤纶与棉织物的染色差异,为实现涤/棉混纺织物活性染料同浴同色染色,基于紫外光接枝技术,将N—(3—二甲氨基丙基)甲基丙烯酰胺(DMAPMA)接枝到涤/棉混纺织物上。采用电子扫描电镜SEM对紫外光接枝改性前后涤/棉混纺织物的表面形貌进行表征。探讨涤/棉混纺织物改性染色工艺参数,如紫外光照射能量、光敏引发剂用量、单体(DMAPMA)质量浓度、染料用量、染色温度、NaCl质量浓度等对染色性能的影响。实验结果表明:经DMAPMA改性的涤/棉混纺织物用活性染料进行染色时,染色深度与上染百分率显著提高,在紫外光照射能量为30 J/cm^(2),光敏引发剂用量为25%(owm),单体质量分数为60%,染料用量为9%(owf),染色温度为60℃,NaCl质量浓度为30 g/L时,涤/棉混纺织物能够获得较好的同色性,耐皂洗色牢度和耐干摩擦色牢度达到4级以上,耐湿摩擦色牢度达到3级以上。

Aiming at the dyeing difference between polyester and cotton fabric by reactive dyes,and to realize homochromatic and one-bath dyeing of polyester/cotton blended fabric with reactive dyes.N-(3-dimethylaminopropyl)methyl acrylamide(DMAPMA)was grafted onto polyester/cotton blended fabric based on UV grafting technology.SEM were used to characterize the surface morphology of the polyester/cotton blended fabric before and after UV grafting.The effects of UV energy,photo initiator(PI)and monomer(DMAPMA)mass concentration,dye dosage,dyeing temperature and concentration of NaCl on the color dyeing performance were investigated.The experimental results show that:DMAPMA modified polyester and cotton fabrics were dyed with reactive dyes,the dyeing depth(K/S value)and dyeing rate improved significantly.When the UV energy was 30 J/cm^(2) by the photo grafting of 60%monomer concentration containing 25%photo initiator concentration on the weight of monomers,the amount of dye was 9%(owf),and the dyeing temperature was 60℃,NaCl mass concentration was 30 g/L,the polyester/cotton blended fabric could obtain better color homogeneity,the color fastness to soap washing and dry rubbing is above grade 4,and the color fastness to wet rubbing is above grade 3.