稳储型液体分散蓝79的制备及其应用性能

Preparation of stable-storage liquid disperse blue 79 and its application performance

为了制备可等量替换粉状分散染料、染色性能优异、储存性能良好的纳米级液体分散染料,采用研磨法对分散蓝79进行液体化加工,并通过对比液体分散染料的染料性能,筛选出适用的阴离子型分散剂,确定非离子型分散剂HLB值范围以及两类分散剂的最佳复配比例,获得分散蓝79液体化的最优复配组合;通过离心实验分析pH值对液体分散蓝79稳定性的影响,并研究室温条件下染料的稳储性。结果表明:当体系中染料滤饼质量分数为35%、分散剂组分木质素磺酸钠与脂肪酸聚氧乙烯酯质量比为2∶1且占体系质量分数的8.75%时,获得平均粒径196 nm、强度150%的液体分散蓝79,染料扩散性能、分散性能、高温分散稳定性、大颗粒残留测试结果均为5级,pH 5条件下染料离心稳定率可达83.7%;涤纶染色对比研究表明,室温储存180 d后的液体分散蓝79具有与分散深蓝HGL相近的染料提升力、匀染性以及更优异的上染率,且其染色残液吸光度较粉状染料降低77.20%、COD值降低30.56%。采用优化后的液体分散染料制备工艺与配方可制得染料强度及染色性能与商品粉状染料相当,储存稳定性优异的环保型液体分散蓝79。

To prepare nanoscale liquid disperse dyes with excellent dyeing performance and good storage performance that can replace powder disperse dyes in equal amounts,the liquidation of disperse blue 79 was carried out by the milling method,and the applicable anionic dispersants were screened out by comparing the dyeing performance of the liquid disperse dyes,and the range of HLB values of the nonionic dispersants as well as the optimal compounding ratios of the two dispersants were determined to obtain the optimal compounding combinations for the liquidation of disperse blue 79;the effect of pH on the stability of disperse blue 79 liquid was analyzed by centrifugal experiment,and the stable storage of the dye was investigated under the room temperature condition.The results showed that when the mass fraction of the dye cake in the system was 35%,the mass ratio of sodium lignosulfonate and fatty acid polyoxyethylene ester in the dispersant component was 2∶1 and accounted for 8.75%of the mass fraction of the system,the liquid dispersed blue 79 with an average particle size of 196 nm and a strength of 150%was obtained.The dye diffusion performance,dispersing property,dispersing stability at high temperature,and the results of the test on the large-particle residual were all tested to be grade 5,and the centrifugal stability of the dye under pH 5 could reach 83.7%.Comparative studies on polyester dyeing showed that the liquid dispersed blue 79 after 180 d of storage at room temperature had similar dye lifting power,even dyeing and better dyeing rate as the dispersed dark blue HGL,the absorbance of the residual liquid after dyeing was 77.20%lower than that of the powdered dyes,and the COD value was reduced by 30.56%.The optimized liquid disperse dye preparation process and formulation can produce environmentally friendly liquid disperse blue 79 with dye strength and dyeing performance equivalent to that of commercial powder dyes and excellent storage stability.