分别将细乳液和微悬浮聚合制得的有机颜料微胶囊应用于棉织物的涂料印花,通过显微观察和服用性能测试研究微胶囊形态对印制棉织物表面形貌和印花效果的影响,探讨微胶囊印花的成膜机制.发现采用准纳米级的细乳液聚合制备微胶囊具有较好的铺展流动性和白黏性,因而通过焙烘成膜可将其中的有机颜料颗粒高效稳定均匀牢固地包埋在纱线上表层单纤维表面的连续薄膜层内,相应的印花织物表现出较好的色牢度、色深性和手感.微悬浮聚合制备微胶囊会因其大的尺寸和高的颜料颗粒数,而使其中的颜料颗粒只能以大规模聚集体的形式堆积于纱线表面的局部区域.由此认为微胶囊的形态结构及其在焙烘成膜过程中颜料颗粒的迁移扩散能力对于织物的印花效果具有重大的影响.%Microcapsulated organic pigment ( I ) prepared with miniemulsion by polymerization and microcapsulated organic pigment ( II ) prepared with micro-suspended emulsion by polymerization were applied to the pigment printing of cotton fabrics respectively. The morphology of the microcapsule on the printing result and the morphology of the printed cotton was examined by microscopy and testing of the wearability of the printed fabrics. The film-formation mechanism of microcapsulated pigment on the printed surface of the fabrics was investigated. It was found that the microcapsulated pigment ( I ) prepared with quasi-nanometer scale miniemulsion has better spreading flowability and self-adhesion so that its pigment can be evenly and firmly coated on the surface of the yarn under the continuous film after curing, and the fabric printed with microcapsulated organic pigment ( I ) displayed better color fastness, depth of shade, and hand feeling. By contrast, the fabric printed with microcapsulated organic pigment ( II ) showed gathered state depositing pigment particles on its surface due to the large size of the pigment particles. It so comes to the conclusion that the morphology of microcapsulated pigment and the spreadability and migrating of pigment particles during film curing have great effect on the printing quality of cotton fabrics.
展开▼
