Effect of the modified dispersing agent and milling time on the properties and particle size distribution of inkjet ink formulation for textile printing

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
H. Abd El-Wahab ◽  
A.M. Nasser ◽  
H.M. Abd ElBary ◽  
M. Abd Elrahman ◽  
M. Hassanein
Keyword(s):  
Surface Tension ◽  
Particle Size ◽  
Milling Time ◽  
Polyester Fabric ◽  
Light Fastness ◽  
Content Type ◽  
Textile Printing ◽  
Dispersing Agent ◽  
Dispersing Agents ◽  
Ink Formulation

Purpose This paper aims to study the effect of the new modified dispersing agent, milling time of the properties and particle size distribution (PSD) of inkjet ink formulation for polyester fabric printing. Design/methodology/approach The study’s methods include preparation of different formulations of textile inkjet inks based on different types of dispersing agents, then applying and evaluating the prepared formulations on the polyester fabric. The properties of the prepared ink formulations were analyzed by measuring viscosity, surface tension and particle size. The current work is including the study of the effect of using different doses of different dispersing agents and the milling time on their characteristics. Also, the study was extended to evaluate the printed polyester by using the prepared inks according to light fastness, washing fastness, alkali perspiration fastness and crock fastness. Findings The results showed that the used dispersing agents and the different milling time enhanced the viscosity and dynamic surface tension in the accepted range, but it was largely cleared in the PSD which tends to perform the inks on the printhead and prevent clogging of nozzles. Light fastness, washing fastness, alkali perspiration fastness and crock fastness gave good results in agreement with this type of inkjet inks for textile printing. Research limitations/implications In this work, good results were obtained with this type of dispersing agent for inkjet ink formulations, but for other dispersing agents, other tests could be performed. The inkjet ink could also be formulated with other additives to prevent clogging of nozzles on the printhead. Practical implications These ink formulations could be used for printing on polyester fabric by the inkjet printing. Originality/value Recently, there was a considerable interest in the study of the effect of PSD on the inkjet inks to prevent clogging of nozzles on the printhead and to improve the print quality on the textile fiber.

The effect of ink formulation on colorimetric properties of inkjet printing considering the impact of substrates

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Darya Ewaznezhad Fard ◽  
Saeideh Gorji Kandi ◽  
Marziyeh Khatibzadeh
Keyword(s):  
Surface Tension ◽  
Physical Properties ◽  
Inkjet Printing ◽  
Methyl Cellulose ◽  
Test Results ◽  
Viscosity Modifier ◽  
Content Type ◽  
Polymeric Compounds ◽  
The Impact ◽  
Ink Formulation

Purpose The purpose of this study is to investigate the changes in the performance of ink formulations caused by the addition of compounds that improve the ink’s physical properties to achieve an optimum formulation for inkjet printing, because of the importance and simplicity of this method. Design/methodology/approach Ink samples were formulated using Acid Red 14 as ink colorant, different percentages of polymeric compounds including polyvinyl alcohol (PVA), polyvinylpyrrolidone and Carboxy methyl cellulose (CMC) as viscosity modifier compounds and surfactant as the surface tension enhancer. Formulated samples were adjusted in terms of fluid physical properties e.g. viscosity, density and surface tension, and the effect of used compounds on the improvement of both physical and colorimetric properties such as viscosity, surface tension, colorimetric coordinates and lightfastness has been evaluated to achieve the optimum printing inks to be printed on three different substrates. Findings The experimental observations showed that CMC was the most compatible compound as the viscosity modifier as its viscosity value was in the printable range of 2–22 cP. Moreover, a flow-curve test was applied to the ink samples and their Newtonian behavior was approved. Based on the spectrophotometric test results of printed samples, the samples containing PVA provided acceptable lightfastness in comparison to other ink samples on every used substrate. Originality/value An optimum relation between colorimetric coordinates of the printed samples and ink formulation could be considered and achieved.

Microwave-assisted synthesis of disazothiazolone dyes as antibacterial agents and their application in polyester printing

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ebtsam Abdelmowla Ahmed ◽  
Galal Elgemeie ◽  
Kawther Abd-Elzaher Ahmed
Keyword(s):  
Antibacterial Activity ◽  
Diazonium Salt ◽  
Polyester Fabric ◽  
Microwave Assisted Synthesis ◽  
Thiazole Derivatives ◽  
Color Strength ◽  
Simple Method ◽  
Content Type ◽  
Textile Printing ◽  
Diazo Dyes

Purpose This study aims to represent a successful simple method for the synthesis of some novel dyes based on thiazole derivatives and their applications in textile printing. Design/methodology/approach 2-(benzo[d]thiazol-2-ylmethyl)thiazol-4(5H)-one compound is prepared by convention heating and microwave technique then used as a coupling agent, which reacts with different diazonium Salt to form diazo dyes. Findings The synthesized diazo dyes are confirmed via spectral data (IR,1H-NMR, 13C-NMR and Mass spectra). The dyes are used to print polyester fabric. The obtained results clarified that the prints have good color strength, brilliant color and highly durable antibacterial activity. Originality/value The authors designed efficient synthesis for some novel thiazolone dyes. The novel procedure features short-reaction time, very good yields and a simple workup. The authors studied the antibacterial activity and their application in printing polyester fabrics.

Discussion

1929 ◽  
Vol 2 (4) ◽  
pp. 636-637
Author(s):  
C. R. Boggs
Keyword(s):  
Particle Size ◽  
Natural Gas ◽  
Carbon Black ◽  
Small Particle ◽  
Small Particle Size ◽  
Polar Compound ◽  
Dispersing Agent ◽  
Filler Dispersion ◽  
Dispersing Agents

Abstract Doctor Blake has suggested a theory for the mechanism of filler dispersion and reënforcement. However, he deals only with carbon black in rubber. Carbon black is the most important reënforcing ingredient we have for a tire-tread compound. Being a conductor, it cannot be used in appreciable quantities in insulation. We might consider the possibility of finding a non-conducting reënforcing filler for insulation and also what should be done when the present supply of natural gas is depleted. What is needed is a material similar to clay which is cheap and has a small particle size. With present dispersing agents, clay does not, however, reënforce rubber to anywhere near the extent that carbon black does. For a filler to reënforce satisfactorily it must be well dispersed and adhere firmly to the rubber. The correct dispersing agent should bring this about. This agent should be a polar compound. One portion of the molecule should be soluble in the rubber hydrocarbon and another portion should be capable of being adsorbed by and adhering strongly to the surface of the clay.

The effect of sieve agitators and dispersing agent on the method of determining and expressing fineness of feed materials by sieving

2012 ◽  
Vol 52 (1) ◽  
pp. 69 ◽  
Author(s):  
C. R. Stark ◽  
C. G. Chewning
Keyword(s):  
Particle Size ◽  
Standard Method ◽  
Geometric Mean ◽  
Geometric Standard Deviation ◽  
Gut Health ◽  
Roller Mill ◽  
Dispersing Agent ◽  
Micron Diameter ◽  
Dispersing Agents ◽  
Ground Corn

Research in both swine and poultry continue to investigate the optimal particle size for growth and gut health. Although researchers have reported the methods used to determine the particle size of the grain in a study, most reports have not provided details of the actual procedure. Although the standard method suggested adding both agitators and dispersing agents to facilitate the flow of material through the sieves there has been limited research as to whether these modifiers significantly change the particle size value. Researchers, laboratories, and feed mills that analyse samples without sieve agitators or a dispersing agent could overestimate the particle size and underestimate the distribution of the particles of a sample. Two experiments were conducted to determine the effect of adding sieve agitators and dispersing agent to the ANSI/ASAE S319.3 FEB03 ‘Method of Determining and Expressing Fineness of Feed Materials by Sieving’. The first experiment evaluated the effect of sieve agitator use and dispersing agent use on the geometric mean diameter (dgw) and geometric standard deviation (Sgw) of hammermill and roller mill corn samples. Whole corn was ground to produce samples that were classified as either coarse, medium, or fine. The second experiment evaluated the effect of sieve agitators, a dispersing agent, and the combination of agitators with a dispersing agent on dgw and Sgw of hammermill ground corn, wheat, and sorghum. The results of Expt 1 indicated that a decreased (P < 0.01) dgw resulted when agitators were added to the hammermill ground samples while a further decrease (P < 0.01) was observed due to the addition of the dispersing agent. The largest decrease in dgw was observed due to the addition of the dispersing agent. The addition of agitators to the roller mill samples only decreased the dgw of the medium grind sample. The dispersing agent decreased (P < 0.01) the dgw of roller mill samples. The addition of a dispersing agent consistently decreased the dgw of all the ground corn samples as compared with the standard method without modifiers. The results of Expt 2 were consistent with those of Expt 1 in that the addition of the dispersing agent and agitators decreased dgw values and appeared to have an additive effect in both corn and sorghum samples. The addition of a dispersing agent facilitated the flow of product through the sieves. The wider distribution (Sgw) indicated that a greater percentage of material flowed to the smaller sieves. The results of the experiments clearly showed the benefit of adding sieve agitators and a dispersing agent to facilitate the flow of material through the sieves, so that a better estimate of the micron diameter and particle size distribution could be achieved.

scholarly journals Surface Activity of Humic Acid and Its Sub-Fractions from Forest Soil

2021 ◽  
Vol 13 (15) ◽  
pp. 8122
Author(s):  
Shijie Tian ◽  
Weiqiang Tan ◽  
Xinyuan Wang ◽  
Tingting Li ◽  
Fanhao Song ◽  
...  
Keyword(s):  
Surface Tension ◽  
Particle Size ◽  
Humic Acid ◽  
Forest Soil ◽  
Surface Activity ◽  
Self Assembly ◽  
Average Particle Size ◽  
Gaussian Model ◽  
Exponential Model ◽  
Average Particle

Surface activity of humic acid (HA) and its six sub-fractions isolated from forest soil were characterized by surface tension measurements, dynamic light scattering, and laser doppler electrophoresis. The surface tension of HA and its sub-fractions reduced from 72.4 mN·m−1 to 36.8 mN·m−1 in exponential model with the increasing concentration from 0 to 2000 mg·L−1. The critical micelle concentration (CMC) and Z-average particle size ranged from 216–1024 mg·L−1 and 108.2–186.9 nm for HA and its sub-fractions, respectively. The CMC have related with alkyl C, O-alkyl C, aromatic C, and carbonyl C (p < 0.05), respectively, and could be predicted with the multiple linear regression equation of CMC, CMC = 18896 − 6.9 × C-296 × alkyl C-331 × aromatic C-17019 × H/C + 4054 × HB/HI (p < 0.05). The maximum particle size was 5000 nm after filtered by a membrane with pore size of 450 nm, indicating HA and its sub-fractions could progressed self-assembly at pH 6.86. The aggregate sizes of number-base particle size distributions were mainly in six clusters including 2 ± 1 nm, 5 ± 2 nm, 10 ± 3 nm, 21 ± 8 nm, 40 ± 10 nm, and >50 nm analyzed by Gaussian model that maybe due to the inconsistency of the components and structures of the HA sub-fractions, requiring further study. It is significance to explore the surface activity of HA and its sub-fractions, which is helpful to clarify the environmental behavior of HA.

Microwave synthesis, photophysical properties of novel fluorescent iminocoumarins and their application in textile printing

2015 ◽  
Vol 44 (2) ◽  
pp. 87-93 ◽  
Author(s):  
G.H. Elgemeie ◽  
K.A. Ahmed ◽  
E.A. ahmed ◽  
M.H. helal ◽  
D.M. Masoud
Keyword(s):  
Blue Light ◽  
Microwave Synthesis ◽  
Photophysical Properties ◽  
Ethyl Cyanoacetate ◽  
High Yield ◽  
The Novel ◽  
Dioxane Solution ◽  
Content Type ◽  
Textile Printing ◽  
Short Time

Purpose – This paper aims to synthesise coumarine flourescent dyes from a cheap material in a very short time with a very high yield, and by using a clean green chemistry. Design/methodology/approach – Efficient microwave synthesis for some novel iminocoumarins starts from the reaction of p-phenyl-enediamine and ethyl cyanoacetate followed by cyclocondensation with salicylaldehyde derivatives. Findings – The synthesized iminocoumarine compounds were characterized by spectroscopic methods. Absorption and fluorescence spectra of the compounds were also recorded. All compounds were fluorescent in 1,4-dioxane solution, they all emitted blue light (440-460 nm). The printing properties were studied, and their applications on printing polyester and polyamide fabrics were studied by silk screen printing. Originality/value – The authors designed efficient microwavel synthesis for some novel iminocoumarine derivatives; The novel procedure features short-reaction time, moderate yields and simple workup; All compounds were fluorescent in 1,4-dioxane solution, and they all emitted blue light; The authors studied their application in printing polyester and polyamide fabrics.

scholarly journals On the contribution of Aitken mode particles to cloud droplet populations at continental background areas – a parametric sensitivity study

2007 ◽  
Vol 7 (3) ◽  
pp. 6077-6112
Author(s):  
T. Anttila ◽  
V.-M. Kerminen
Keyword(s):  
Surface Tension ◽  
Particle Size ◽  
Chemical Composition ◽  
Pure Water ◽  
Particle Surface ◽  
Chemical Properties ◽  
Sensitivity Study ◽  
Geometric Standard Deviation ◽  
Cloud Droplets ◽  
Aitken Mode

Abstract. Aitken mode particles are potentially an important source of cloud droplets in continental background areas. In order to find out which physico-chemical properties of Aitken mode particles are most important regarding their cloud-nucleating ability, we applied a global sensitivity method to an adiabatic air parcel model simulating the number of cloud droplets formed on Aitken mode particles, CD2. The technique propagates uncertainties in the parameters describing the properties of Aitken mode to CD2. The results show that if the Aitken mode particles do not contain molecules that are able to reduce the particle surface tension more than 30% and/or decrease the mass accommodation coefficient of water, α, below 10−2, the chemical composition and modal properties may have roughly an equal importance at low updraft velocities characterized by maximum supersaturations <0.1%. For larger updraft velocities, however, the particle size distribution is clearly more important than the chemical composition. In general, CD2 exhibits largest sensitivity to the particle number concentration, followed by the particle size. Also the shape of the particle mode, characterized by the geometric standard deviation (GSD), can be as important as the mode mean size at low updraft velocities. Finally, the performed sensitivity analysis revealed also that the chemistry may dominate the total sensitivity of CD2 to the considered parameters if: 1) the value of α varies at least one order of magnitude more than what is expected for pure water surfaces (10−2–1), or 2) the particle surface tension varies more than roughly 30% under conditions close to reaching supersaturation.

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