Tang Zhiyuan, Fang Kuanjun, Bukhari Mohd Nadeem, Song Yawei, Zhang Kun
College of Textiles & Clothing, Qingdao University, 308 Ningxia Road Qingdao 266071, China.
State Key Laboratory for Biofibers and Eco-textiles, 308 Ningxia Road, Qingdao 266071, China.
Langmuir. 2020 Aug 18;36(32):9481-9488. doi: 10.1021/acs.langmuir.0c01392. Epub 2020 Aug 4.
In textile inkjet printing, understanding the effect of viscosity and surface tension of a reactive dye ink on droplet formation is of great significance. As an organic ecofriendly solvent, polyethylene glycol with a molecular weight of -400 g/mol (PEG400) was used to prepare reactive dye inks with or without Surfynol 465 (S465) to explain separately how viscosity and surface tension affect the droplet formation of a reactive dye ink. The intermolecular interactions in the ink and physical properties of the ink were investigated by measuring the visible absorption spectra, hydrodynamic radius, viscosity, and surface tension. Droplet formation under a single variable influence of viscosity or surface tension was observed by taking photographs using a high-speed camera. Results show that a high ink viscosity condition generates no satellite droplet formation and a slower droplet velocity, and a higher surface tension tends to cause ligament rupture from the nozzle tip and the droplet. Moreover, a twill cotton fabric printed using the PEG-S465-dye ink at a 30% PEG400 concentration showed higher ink penetration, dye fixation rate, ideal color strength, and rubbing fastness.
在纺织喷墨印花中，了解活性染料油墨的粘度和表面张力对墨滴形成的影响具有重要意义。作为一种有机环保溶剂，分子量为400 g/mol的聚乙二醇（PEG400）被用于制备添加或不添加Surfynol 465（S465）的活性染料油墨，以分别解释粘度和表面张力如何影响活性染料油墨的墨滴形成。通过测量可见吸收光谱、流体动力学半径、粘度和表面张力，研究了油墨中的分子间相互作用和油墨的物理性质。使用高速相机拍照观察在粘度或表面张力单一变量影响下的墨滴形成。结果表明，高油墨粘度条件下不会产生卫星墨滴，且墨滴速度较慢，而较高的表面张力往往会导致从喷嘴尖端和墨滴处出现液柱破裂。此外，使用浓度为30% PEG400的PEG-S465-染料油墨印花的斜纹棉织物表现出更高的油墨渗透性、染料固着率、理想的色强度和摩擦牢度。
