Relationship between the dye/additive interaction and inkjet ink droplet formation

Abstract

To design adequate ink composition for textile printing, the relationship between the dye/additive interaction and the ink performance are investigated. In the present study, three acid dyes, C. I. Acid Red 88, 13, and 27, a water-soluble polymer poly(vinylpyrrolidone) (PVP) and three surfactants, sodium dodecyl sulfate (SDS), octaethylene glycol monododecyl ether (OGDE), and Surfynol 465 (S465) were used and the dye/additive interaction was investigated by means of visible absorption measurements. The visible absorption spectra of aqueous dye solutions changed with the addition of the nonionic surfactants, but further addition of PVP hardly changed, indicating that the strong binding of the dye molecules with the nonionic surfactant micelles is maintained even in the presence of PVP. In contrast, in the case of SDS, the spectra changed with the addition of the surfactant as well as further addition of PVP. From the above results, the behavior of the acid dyes in three species coexistence system depends on the dye structure, the surfactant structure, the molecular weight of PVP, and so on. Furthermore, to estimate the ink performance, the physical properties of the ink such as viscosity, surface tension, and ink droplet formation were determined. The composition of the ink solution having excellent ink droplet  Corresponding author. Tel.: +81 268 21 5411; fax: +81 268 21 5391 E-mail address: khamada@shinshu-u.ac.jp (K. Hamada) formation was observed, which had appropriate physicochemical properties such as viscosity and surface tension as well as PVP with lower molecular weight. In the optimized ink composition (PVP-1/S465: 1.4/0.004 mol dm -3 ), most of the dye molecules are strongly bound to the PVP chain, but the binding was hardly affected by the addition of S465.

Synthesis, structural characterization and molecular modelling of bidentate azo dye metal complexes: DNA interaction to antimicrobial and anticancer activities

“…The Nujol mull spectrum of Mn 2+ complex C1 exhibited two broad bands at 18 534 and 20 704 cm −1 due to 6 A 1 → 4 T 2 (G) and 6 A 1 → 4 E (G) transitions, respectively, corresponding to tetrahedral architecture. [48] Mn 2+ complex C1 has a magnetic moment value of 6.1 BM, supporting the tetrahedral arrangement for the complex.…”

Preparation of disperse inks for direct inkjet printing of non-pretreated polyester fabrics

“…The ink drop (1-4a, 1-5a) only leaks out of the nozzle, and the inkjet discharge properties are very poor, suggesting that PVA, with a high molecular weight and concentration, can easily cause clogging problems due to entanglement and uidity decline. 20 The inks (1-5b, 1-6b) with adequate surface tension but inadequate viscosity are shown in Fig. 5 (1-5b and 1-6b).…”

The influence of ink viscosity, water and fabric construction on the quality of ink‐jet printed polyester

“…It is generally accepted that the viscosity of disperse inks have a range within 1 to 25 mPa.s. 15,23 The surface tension must also be low enough so that the disperse ink is able to wet the nozzle and polyester fabric. The surface tension of the ink must be lower than the surface energy of the polyester fibre (43 mN/m) for wetting the surface thoroughly, in order to achieve high quality printing of polyester textiles.…”