低黏型聚氨酯丙烯酸酯低聚物的合成及其在纺织品蓝光固化数码印花中的应用

发布时间：2018-03-25 22:04

本文选题：聚氨酯丙烯酸酯　切入点：低黏度　出处：《浙江理工大学》2015年硕士论文

【摘要】：数码喷墨印花是当今世界最为先进的印花技术，喷印过程中墨滴的使用是由计算机“按需分配”控制，代表了未来纺织品印花的发展趋势。然而，在其后道固化和整理阶段，仍存在工艺复杂、耗水耗能严重的问题。本课题应用自制的低黏型聚氨酯丙烯酸酯作为固化连接料，通过添加光引发剂、颜料、活性稀释单体、润湿分散剂制备蓝光固化喷墨印花墨水，直接喷印到织物表面，再用蓝光引发大分子固化成膜，替代传统工艺中的水洗和热固化步骤，得到喷墨印花织物。本课题对低聚物的合成和喷墨墨水的配方进行了优化，测试并分析了其服用性能，结果表明优化出的墨水具有较好的服用性能。首先，探究了低黏型聚氨酯丙烯酸酯的合成工艺，通过二正丁胺滴定法和红外光谱法对合成反应进程进行跟踪监测，讨论了反应温度、物料配比以及催化剂用量对合成过程的影响。聚氨酯丙烯酸酯低聚物的合成以异佛尔酮二异氰酸酯（IPDI）、聚丙二醇1000（PPG-1000）和丙烯酸羟乙酯（HEA）为主要原料，采用两步法合成低聚物，最佳工艺条件为：第一步反应温度80℃，不加催化剂，反应时间7h；第二步反应温度为50℃，催化剂用量0.05%，阻聚剂用量0.1%，反应时间2h。采用旋转流变仪和光量热系统（Photo-DSC）对合成产物的流变性能和蓝光聚合性能进行评价。结果表明，在最佳的合成工艺下，制得的聚氨酯丙烯酸酯低聚物具有黏度低、蓝光聚合性能优良的特点，能够满足蓝光固化纺织品数码印花墨水对低聚物流变和蓝光聚合性能的要求。其次，从流变性能、分散稳定性、聚合性能三个方面对墨水体系的性能进行研究，探讨了活性稀释单体、颜料、润湿分散剂对墨水体系的影响。实验得出最佳墨水配方：聚氨酯丙烯酸酯57.6wt%（wt%为占墨水总重百分比，下同），丙烯酸异冰片酯28.8wt%，丙烯酸羟乙酯9.6wt%，颜料0.5wt%，樟脑醌1wt%，4-(二甲氨基)苯甲酸乙酯1wt%，润湿分散剂1.5wt%。最后，以纯棉织物为例对墨水的服用性能进行了系统的研究，探讨了聚合体系、引发剂体系和光照条件对喷墨印花织物干、湿耐摩擦色牢度的影响，并从颜色深度和织物表观微形貌等方面对摩擦前后进行了观察。研究结果表明，优选墨水印花织物的摩擦色牢度都可达3级以上，，具有较好的耐摩擦色牢度；印花的色泽均匀，轮廓清晰。
[Abstract]:Digital ink-jet printing is one of the world's most advanced printing technology, the use of the ink jet printing process by computer control, "Dama" represents the future trend of development of textile printing. However, after curing and finishing stage, there are still complicated technology, water and energy consumption of the subject of serious problems. Application of self-made low viscosity polyurethane acrylate as curing binder, by adding photoinitiator, active diluent monomer, pigment, wetting and dispersing agent to prepare the blue light curing ink jet printing ink, directly printed onto the fabric surface, and then the blue light induced molecular film-forming, instead of washing and heat curing steps in the traditional process get the ink-jet printing fabric. The synthesis of oligomers and ink formulation was optimized, analyzed its wearability testing and the results show that the optimization of ink has better wearability Can.
First of all, to explore the synthesis of low viscosity polyurethane acrylate, the reaction process was monitored by two n-butylamine titration and infrared spectroscopy. The effects of reaction temperature, material ratio and amount of catalyst on the synthesis process. The polyurethane acrylate oligomers were synthesized with isophorone diisocyanate (IPDI), polypropylene 1000 glycol (PPG-1000) and 2-hydroxyethyl acrylate (HEA) as the main raw material, using two step synthesis of oligomers, the optimum conditions were: the first step of the reaction temperature is 80 DEG C, without catalyst, the reaction time is 7h; the second step reaction temperature is 50 DEG C, 0.05% catalyst, inhibitor dosage 0.1%, reaction time 2h. using a rotary rheometer and light thermal system (Photo-DSC) the rheological properties of the synthetic products and blue polymerization properties were evaluated. The results showed that the best synthesis process, acrylic polyurethane prepared Enolate oligomers have the characteristics of low viscosity and excellent blue light polymerization performance, which can meet the requirements of blue printing textiles, digital printing ink, low polymer logistics and blue light polymerization.
Secondly, the dispersion stability from three aspects, the rheological properties, polymerization performance of ink system, discusses the active diluent monomer, pigment, wetting and dispersing agent on the influence of ink system. The optimum ink formulation: polyurethane acrylate 57.6wt% (wt% is the percentage of ink weight percentage, the same below), isobornylacrylate 28.8wt%, hydroxyethyl acrylate 9.6wt%, pigment 0.5wt%, 1wt% CAMPHORQUINONE (two 4-, 1wt% dimethylamino) ethyl benzoate, wetting and dispersing agent 1.5wt%.
Finally, the system of YISHION for cotton fabric wearability of ink, discusses the polymerization initiator system and light conditions on inkjet printing fabric, the influence of the wet rubbing fastness, and from the depth of color and fabric apparent morphology of the friction were observed before and after. The results show that the selection of ink printing fabric friction fastness can reach level 3 or above, with good color fastness to rubbing; printing color uniform, clear outline.

【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TS194.22

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