Anthraquinone-based solvent red, yellow (or green), and blue dyes used as essential ingredients were completely dissolved in styrene miniemulsion system, and a set of nanocolorants were successfully ...prepared by using a modified miniemulsion polymerization process. In architecture, the obtained nanocolorants belong to a class of nanocomposite entities, in which a fraction of dye molecules are attached with crosslinked macromolecular chains and more dye being embedded in the interior of crosslinked polymer owed to the high hydrophobicity of dyes and phase separation between dye and polymer during the polymerization process. The performance characterization of the obtained nanocolorants indicated that they exhibited excellent chromatic properties attributed to the nanoscale effects of homogeneous nanocolorants, and really achieved superior migration fastness, light fastness, thermal stability, and good processibility. These nanocolorants are very applicable for aqueous ink-jet inks, color resistance, high-performance coloration for polymers, and for electrophotographic toners.
The preparation of water-based disperse inks was made using water and a mixture of 2-propanol/ethylene glycol as the water-miscible solvent. Ethylene glycol acted also as a wetting agent. The surface ...tension, pH, viscosity and conductivity of the above formulations were monitored over a period of 360 days. The same inks were prepared by adding solutions of 0.5, 1.0 and 2.0% w/v of fragrance microcapsules, as well as the same concentrations of an antimicrobial agent dispersion as active additives, and the properties were monitored over 360 days. The compatibility of the two additives with the ink ingredients, as well as the suitability of the final inks for ink-jet printing, was confirmed by these measurements. The inks were used (i) for dyeing polyester and polyamide samples and (ii) for ink-jet printing on paper, transfer printing on polyester and thermostabilization. Wash and light fastness were evaluated on the dyed and printed samples according to BS 1006:1990 CO2 and BO2, respectively, and they were found to be very good to excellent for polyester samples, and medium for polyamide samples. Color measurements of the dyed and printed polyamide and polyester samples were made and the results confirmed the high affinity of the two disperse dyes to the non-polar polyester fiber compared to the polyamide fiber. Qualitative and quantitative determination of the agents adsorbed on the dyed and printed polyester samples was made by gas chromatography-mass spectroscopy or spectrophotometrically.
Two water based disperse inkjet inks for polyester textile printing with antibacterial properties were prepared. The antibacterial activity was due to the presence of polyhexamethylene bisguanidine ...(PHMBG). The surface tension, pH, viscosity and conductivity of all inks formulations were monitored over a period of time for the evaluation of ink stability and suitability. The inks were used for application on polyester and polyamide samples by exhaustion (dyeing) and wash, light fastness and colour measurements were made on the dyed samples. The optimum application level required to give long lasting antimicrobial protection was determined by carrying out a series of antimicrobial testing.
•We use a novel plasma method for the preparation of high-quality carbon black (CB).•The method is environmentally benign and economic.•CB nanoparticles are successfully modified by ...polyvinylpyrrolidone.•The modified CB is used as a pigment for the preparation of water-based ink-jet ink.•Physical and printing properties of the ink are comparable with the commercial one.
A new route is presented for the production of carbon black (CB) in which the propane is cracked into CB and hydrogen using electric energy from a low-current, high-voltage plasma discharge. The spherical CB produced by this process possessed a narrow size distribution, an average diameter of 50nm and a high oil absorption number (OAN) of 136mL/100g. The prepared CB nanoparticles were first hydroxymethylated with a formaldehyde solution and subsequently oxidized using concentrated nitric acid to introduce hydroxyl and carboxyl acid groups onto the CB surface. These hydrophilic groups were beneficial for breaking up the large CB particles into smaller particles, and they significantly improved the dispersity of the CB nanoparticles in aqueous media. The modified CB was then coated by polyvinylpyrrolidone (PVP), in which the carbonyl oxygens acted as proton acceptors to form hydrogen bonds with the carboxyl acid groups. Finally, the PVP-coated CB was dispersed in an aqueous solution and was formulated into a pigmented ink-jet ink. The physical and printing properties of the prepared ink were demonstrated to be comparable with the commercial ink.
Surface-modified and micro-encapsulated pigment dispersions were formulated into pigmented ink jet inks and their properties were analyzed. The changes in viscosity, and particle size distribution, ...and ink stability were observed every week for 12 weeks at ambient temperature. All the ink jet ink properties were in the operational range. As for appearance and color, the surface-modified pigmented inks printed on a silk fabric yielded higher optical densities, better tone reproduction, wider color gamut, and a larger gamut volume than the micro-encapsulated pigmented inks. For permanence and usability, the micro-encapsulated pigmented inks gave better fastness; the wear comfort of the printed silk fabric, evaluated by the bending stiffness, indicated a negative effect on the pre-treatment of the fabric. Surface pre-treatment of the textile fabrics affected color, appearance, permanence and usability. Despite almost equal numbers of threads, the fabric bending strength in the weft direction was much stronger than that in the warp direction.
•Preparation of ink-jet inks with/without antimicrobial agents as additives.•Monitoring of the inks physical properties over 180 days.•Digital printing of polyester and polyamide fabrics.•Color ...measurements and fastness properties control of the prints.•Quantitative determination of the agents and antimicrobial assessment of the prints.
Two antimicrobial agents, Silpure FBR-5, a novel polymeric silver combination product and Ultrafresh NM-V2 a formulation based on the active ingredient triclosan were used as active agents in this work. These were added in several amounts in water-based disperse ink-jet inks. The surface tension, pH, viscosity and conductivity of the prepared formulations were monitored over a period of 180 days in order to estimate the ink stability and the compatibility of the antimicrobial agents with the ink constituents. The inks were used for ink-jet printing of polyester and polyamide samples. Fastness and color properties of the samples were measured. Quantitative determination of the antimicrobial agents extracted of the printed sample was made and quantitative antibacterial assessment of the printed samples treated with triclosan and Silpure are also given.
Fluorescent intensity is an important indicator to evaluate the performances of fluorescent inkjet ink. It can be affected by many factors, such as the structure and content of fluorescent material, ...the polarity of solvent, the type and content of resin, optical properties of different substrates. Formulation of red fluorescent ink-jet ink was designed in the paper and ink samples were prepared to explore the impact of fluorescent material content, solvent polarity, and resin type on fluorescent intensity. Results show that: fluorescent intensity gradually increases as fluorescent material content increases, when the content reaches 1.0%, fluorescent intensity decreases; saturated solubility of fluorescent material at room temperature (25°C) is 1.6%; When propylene glycol monomethyl ether acetate (PMA): ethyl acetate: n-butyl acetate = 0.36:0.42:0.22, resin EP-609 content is 16%, fluorescent intensity reaches to the highest.
Display omitted
► Preparation of ink-jet inks with fluorescent brighteners as antifraud markers. ► Surface tension, pH, conductivity, viscosity measurements and stability evaluation. ► Ink-jet ...printing on polyester and polyamide fibres. ► Quality control tests of the printed samples. ► Quantitative determination of the antifraud marking agents.
Two stilbene derivatives, Kahablanc APU (C.I Fluorescent Brightener 220) and Kahablanc BA (C.I Fluorescent Brightener 113) were used as possible “antifraud markers”. These were added in several amounts in water-based disperse ink-jet inks. The surface tension, pH, viscosity and conductivity of the formulations prepared were monitored over a period of 90 days in order to estimate the ink stability and the compatibility of the “antifraud” active agents with the ink constituents. The inks were used for ink-jet printing of polyester and polyamide samples. Fastness and colour properties of the samples were measured. Qualitative and quantitative determination of the stilbene derivatives extracted from the printed samples was made and a simple spectrophotometrical method for their detection was proposed.
In order to research and control the surface tension of the water-based ink-jet ink, and ensure the printing quality of the ink, water-based ink samples with different surface tension are prepared ...and the roundness, volume, speed and the tail length of the drop are measured in order to analyze the influence of surface tension to drop state. The influence of the main components to the surface tension is discussed through testing the surface tension of the water-based ink-jet ink which has different components. The result shows that the surface tension of the water-based ink-jet ink has big influence to the drop state, so the suitable surface tension is the key to guarantee the printing quality. And the kind of the resins influence the surface tension, the influence of adding different kinds and levels of surfactants to surface tension is different.
