UV-curable encapsulation of surface—Modified organic pigments for inkjet printing of textiles

Hakeim, O. A.; Arafa, Asmaa Ahmed; Zahran, M. K.; Abdou, L.

doi:10.1016/j.colsurfa.2014.01.075

Cited by 49 publications

(34 citation statements)

References 25 publications

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“…Figure 3a-d shows the micrographs of the original nanoscale organic pigments. Moreover, the dispersant on pigment surface could increase steric stabilisation and prohibit the aggregation and agglomeration of particles [29]. Figure 4 shows the stability of dispersion test of the four organic pigments after storage for two weeks.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, when dispersing agent dose was too high, the chains could interact with each other, leading to them coating particles in the wrong fashion and thereby to poor dispersion stability [35,36]. Dispersions with high zeta potentials are electrically stable, whereas dispersions with low zeta potentials tend to coagulate or flocculate [29]. A zeta potential test was carried out to evaluate the optimal concentration of dispersing agent for each pigment.…”

Section: Effect Of Dispersing Agent Concentrationmentioning

confidence: 99%

“…There are two approaches to nano-downsizing of organic pigments: build-up and breakdown methods [15]. Investigations into the encapsulation of nanoscale organic pigments into a UV-curable system using the mini-emulsion technique have been reported by Hakeim et al [14,28,29]. However, the applicability of the build-up method is restricted due to the limited solubility of other conventional pigments and the involvement of superfluous production processes.…”

Section: Introductionmentioning

confidence: 99%

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Effect of process conditions on the properties of surface‐modified organic pigments encapsulated by UV‐curable resins

Hakeim

Arafa

Zahran

et al. 2017

Coloration Technology

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Aqueous dispersions of nanoscale organic pigments were successfully prepared via ball milling and ultrasonication. The dispersed organic pigments were encapsulated into UV-curable resins via a miniemulsion technique. Critical factors that affected the dispersion and encapsulation stability were investigated. The encapsulated organic pigments were characterised with transmission electron microscopy, thermogravimetric analyses, Fourier Transform-infrared spectra and zeta potential. The results clarified that the type of dispersing agent plays an important role in achieving maximal dispersion stability. Encapsulated organic pigments showed greater dispersion stability, and better wettability than the original pigments. Polyester tetra-acrylate oligomer can stabilise the mini-emulsion from diffusion degradation and inhibit phase separation with time. 1,6-Hexandiol dimethacrylate was the monomer of choice for ink-jet printing inks. Furthermore, it was found that monomer/oligomer and pigment/resin ratios were more influential and needed to be optimised. Thermal analysis, ultracentrifuge sedimentation and morphologies provided supporting evidence for the encapsulation of organic pigments into UV-curable resins.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Dispersing Agent Concentrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of process conditions on the properties of surface‐modified organic pigments encapsulated by UV‐curable resins

Hakeim

Arafa

Zahran

et al. 2017

Coloration Technology

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“…In pigment printing, the water‐insoluble pigment materials are fixed onto the fibres with binders as they have no affinity for the textile fibres. In the case of organic pigments, they should be dispersed uniformly, or surface treatments should be applied to improve their dispersing ability, in order to be practically useful in applications .…”

Section: Introductionmentioning

confidence: 99%

The effect of ultraviolet‐curable water‐borne polyurethane acrylate binder concentration on the printing performance of synthetic leather

Baysal

Kalav

Kayaoğlu

2018

Coloration Technology

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In this paper, synthetic leather samples were screen printed with pigmented pastes including two types of photoinitiators and three different concentrations of ultraviolet (UV)‐curable water‐borne polyurethane acrylate binder. The curing process was conducted under different combinations of lamps (gallium, mercury, gallium/mercury and gallium/gallium/mercury) at three power levels. Abrasion resistance, crock fastness, hardness and colour strength were investigated. Chemical changes in the clear and pigmented film structures because of UV curing were analysed by Fourier Transform‐infrared spectroscopy measurements. In hardness measurements, the highest hardness values were obtained with clear and pigmented formulations which have the highest solid content (57%). In colour measurements, higher K/S values were obtained in samples printed with the formulation having a binder concentration of 46%. Wet crock fastness values improved as the energy level increased during curing, and the highest values were obtained with a formulation which had a binder concentration of 57%. Greater amounts of binder in the formulations and increased amounts of energy applied to the surface during curing increased the hardness value of the prints, thus better abrasion resistance was obtained. Overall results suggested that the highest hardness, crock fastness and abrasion resistance values were obtained with the formulation with a binder concentration of 57%. However, for ease of application, printing efficiency and colour strength, the formulation with a binder concentration of 46% is recommended for printing, and curing under consecutive passes with gallium and mercury lamps at 120 W/cm is proposed in terms of energy efficiency and printing performance.

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“…Whereas, Aldib 15 investigated the potential of digital inkjet printing of solvent-based ink to produce photochromic textiles, Fu et al 16 studied photonic curing to produce a photochromic crosslinked polymer. In other areas of textile colouration such as pigment printing, the advantages of inkjet printing in combination with photo-curing of an aqueous polyurethane acrylate system 17 or by mini-emulsion encapsulation 18 were explored. To the best of our knowledge, the combination of digital inkjet printing and UV-LED curing has not yet been studied in the industrially applicable fabrication of a UV-sensing smart textile using photochromic dye.…”

Section: Introductionmentioning

confidence: 99%

Inkjet printing and UV-LED curing of photochromic dyes for functional and smart textile applications

Seipel

Periyasamy

et al. 2018

RSC Adv.

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Health concerns as a result of harmful UV-rays drive the development of UV-sensors of different kinds. In this research, a UV-responsive smart textile is produced by inkjet printing and UV-LED curing of a specifically designed photochromic ink on PET fabric. This paper focuses on tuning and characterizing the colour performance of a photochromic dye embedded in a UV-curable ink resin. The influence of industrial fabrication parameters on the crosslinking density of the UV-resin and hence on the colour kinetics is investigated. A lower crosslinking density of the UV-resin increases the kinetic switching speed of the photochromic dye molecules upon isomerization. By introducing an extended kinetic model, which defines rate constants k colouration , k decay and k decolouration , the colour performance of photochromic textiles can be predicted. Fabrication parameters present a flexible and fast alternative to polymer conjugation to control kinetics of photochromic dyes in a resin. In particular, industrial fabrication parameters during printing and curing of the photochromic ink are used to set the colour yield, colouration/decolouration rates and the durability, which are important characteristics towards the development of a UV-sensor for smart textile applications.

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UV-curable encapsulation of surface—Modified organic pigments for inkjet printing of textiles

Cited by 49 publications

References 25 publications

Effect of process conditions on the properties of surface‐modified organic pigments encapsulated by UV‐curable resins

Effect of process conditions on the properties of surface‐modified organic pigments encapsulated by UV‐curable resins

The effect of ultraviolet‐curable water‐borne polyurethane acrylate binder concentration on the printing performance of synthetic leather

Inkjet printing and UV-LED curing of photochromic dyes for functional and smart textile applications

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