Modified C.I. Pigment Red 170 with a core-shell structure: Preparation, characterization and computational study

Jiang

et al. 2019

Coloration Technology

Coloration Technology. 2020;136:15-22. wileyonlinelibrary.com/journal/cote | 15 AbstractTo improve the properties of titanium dioxide particles and realise their firm anchorage in blue light curing film, three modified titanium dioxide particles were prepared by grafting 3-(trimethoxysilyl)propyl methacrylate, 3-aminopropyltriethoxysilane and hexadecyltrimethoxysilane. The surface changes of titanium dioxide particles How to cite this article:

Section: Resultsmentioning

confidence: 99%

Section: Characterisationsmentioning

confidence: 96%

Titanium dioxide grafted with silane coupling agents and its use in blue light curing ink

Jiang

et al. 2019

Coloration Technology

“…The function mechanism of co-stabilizer is described in Scheme 3. For the miniemulsion, the hydrophilic substance (i.e., sodium chloride) can counteract the pressure difference as an osmotic pressure agent and prevents the migrating of water from small droplets into big droplets [21]. When two water droplets come into contact, the interface is equivalent to a semipermeable membrane due to the presence of a surfactant.…”

Section: Resultsmentioning

confidence: 99%

“…The results are shown in Figure 14. It could be seen that the aqueous dispersion of PR 146 crystallized from the miniemulsion showed a much higher absorbance in the region of 200–600 nm, indicating better dispersion [21]. The absorbance of the aqueous dispersion of pigment crystallized from the bulk solution was the lowest.…”

Section: Resultsmentioning

confidence: 99%

Confined Crystallization of Pigment Red 146 in Emulsion Droplets and Its Mechanism

Meng

et al. 2019

Nanomaterials

In this work, the effect of confined space on crystallization processes of pigments was investigated by using C.I. Pigment Red 146 (PR 146) as a model compound. The colloidal system (i.e., emulsion droplets) was used as a nanoreactor to prepare nanoscale PR 146 for the inkjet printer. The effects of the space confinement were investigated by comparing the products of PR 146 prepared from bulk solution, macroemulsion, and miniemulsion. The results showed that PR 146 crystallized in mini-emulsion had the narrowest particle size distribution and the average particle size can be as small as 172.5 nm, one order of magnitude smaller than the one obtained from the bulk solution. X-ray diffraction (XRD) data revealed that PR 146 crystallized in all three solutions where the crystalline state and had similar crystallite sizes. The process mechanism of crystallization confined in the miniemulsion droplets was proposed and explained. The function mechanism of the co-stabilizer during the crystallization of PR 146 in emulsion was also explained. It was found that sodium chloride could counteract the pressure difference as an osmotic pressure agent and prevent the migrating of water from small droplets into big droplets. The influences of dosages of emulsifiers and co-stabilizers on droplet size and the size of the obtained PR 146 particles were evaluated and the optimal conditions were determined. Furthermore, the disparity of PR 146 products prepared by different methods was investigated by UV–Vis spectra. The aqueous dispersion of PR 146 crystallized in miniemulsion had the highest absorbance and darkest color.

“…Generally, traditional colored latex particles [1][2][3][4][5] can be prepared by encapsulating some colorant in polymer shell [6,7] or mixing colorless latex with colorant [8,9]. Colored latex particles with various ingredients and different diameters have attracted much attention in recent years [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Covalent and Solvent-resistance Colored Latex Particles and Its Application on Cotton Fabric

Yang

Tang³

et al. 2020

Fibers Polym

Conventional colored latex particles have poor solvent resistance due to the absence of chemical bonds between the dye and polymer component, resulting in staining and greatly restricting its application. In this research, the disperse dye was chemically bonded to the polymer to prepare covalent and solvent-resistance colored latex particles. Firstly, C.I. Disperse Red 60, as a common disperse dye in industry, was modified by acryloyl chloride (amidation reaction) for the purpose of introducing the C=C bonds. The structure of modified C.I. Disperse Red 60 was confirmed by 1 HNMR, FTIR and elemental analysis and its spectral property was also evaluated. Then the covalent colored latex particles were synthesized via miniemulsion copolymerization of styrene (St) and ethyl acrylate (EA) in presence of modified C.I. Disperse Red 60 monomer. Results of FTIR, TG, DSC and TEM indicated that the covalent colored latex particles were successfully prepared. By using UV-spectroscopy, the solvent resistance of the colored latex membranes in petroleum ether, hexane, cyclohexane, and ethanol was monitored, respectively. Slight change of the absorption was detected for 10 days, which verified the excellent solvent resistance of covalent colored latex membranes. Finally, the prepared colored latex particles were applied on cotton printing in the absence of binder. The results showed that the colored latex particles printed fabric had superior rubbing fastness and soft hand feel.