纳米分散染料胶囊的制备及其对涤纶织物轧染染色性能

Preparation of nanoscale disperse dye microcapsules and study of its pad-dyeing properties on polyester fabric

通过乳液聚合法制备了以C.I.分散紫93为核、甲基丙烯酸甲酯(MMA)-丙烯酸丁酯(BA)共聚物(聚丙烯酸酯)为壳的纳米分散染料胶囊(NDDM),采用TEM、SEM、FTIR、TG对NDDM进行了表征,探究了核壳质量比、MMA/BA质量比、固色温度和固色时间对涤纶织物轧染染色性能的影响。结果表明,NDDM对涤纶织物轧染染色的色牢度和匀染性均优于C.I.分散紫93染色织物。当核壳质量比为1∶2、MMA和BA质量比为1∶1、焙烘温度180℃、焙烘时间5 min时,NDDM轧染染色织物的颜色深,手感变化小,且未水洗染色织物的各项色牢度均达到4级及以上,还原清洗化学需氧量为312.3 mg/L,比C.I.分散紫93还原清洗化学需氧量下降了58%。在高温下,NDDM内分散染料从聚丙烯酸酯壳层内迁移释放并上染纤维,聚丙烯酸酯壳将未进入纤维内的残余染料覆盖固着在纤维表面。

Nanoscale disperse dye microcapsules(NDDM)with C.I.disperse violet 93 as core and copolymer of methyl methacrylate(MMA)and butyl acrylate(BA)(polyacrylate)as shell were prepared by emulsion polymerization method,and then characterized by TEM,SEM,FTIR and TG.Furthermore,the effects of core-shell mass ratio,MMA and BA mass ratio,curing temperature and curing time on the pad-dyeing properties of polyester fabric were investigated.The results showed that the color fastness and levelness of NDDM pad-dyed fabric were better than those of C.I.disperse violet 93 pad-dyed fabric.When the core-shell mass ratio was 1∶2,MMA/BA mass ratio was 1∶1,curing temperature was 180℃,and curing time was 5 min,NDDM pad-dyed fabric exhibited deep color,little change of feel,and the color fastness of unwashed dyed fabrics reached grade 4 and above.Moreover,the chemical oxygen demand(COD)of reduction cleaning was 312.3 mg/L,a reduction of 58%compared with that of C.I.disperse violet 93 dyeing.The better performance could be attributed to the mechanism that,disperse dye in NDDM migrated out of polyacrylate shell and dyed polyester,and the polyacrylate shell covered and binded the residual dye on the surface of polyester fabric at high temperature.