The lifetime of floating liquid marbles: the influence of particle size and effective surface tension

Soft Matter ◽  
2013 ◽  
Vol 9 (37) ◽  
pp. 8980 ◽  
Author(s):  
Ugur Cengiz ◽  
H. Yildirim Erbil
Keyword(s):  
Surface Tension ◽  
Particle Size ◽  
Effective Surface ◽  
Liquid Marbles

Measuring the effective surface tension of a floating liquid marble using X-ray imaging

Soft Matter ◽  
2021 ◽  
Vol 17 (15) ◽  
pp. 4069-4076
Author(s):  
Chin Hong Ooi ◽  
Pradip Singha ◽  
Nhat-Khuong Nguyen ◽  
Hongjie An ◽  
Van Thuong Nguyen ◽  
...  
Keyword(s):  
Surface Tension ◽  
Curve Fitting ◽  
Effective Surface ◽  
X Ray ◽  
Liquid Marbles ◽  
Solid Interface ◽  
Fitting Procedure ◽  
X Ray Imaging ◽  
Liquid Marble

Liquid marbles are non-wetting droplets coated with microscopic powder. We measure the effective surface tension of a liquid marble using X-ray which reveals the hidden liquid–solid interface. A systematic curve fitting procedure is also provided.

A capillary rise method for studying the effective surface tension of monolayer nanoparticle-covered liquid marbles

Soft Matter ◽  
2018 ◽  
Vol 14 (48) ◽  
pp. 9877-9884 ◽  
Author(s):  
Xiaoguang Li ◽  
Renxian Wang ◽  
Shuai Huang ◽  
Yiqi Wang ◽  
Haixiao Shi
Keyword(s):  
Surface Tension ◽  
Capillary Rise ◽  
Effective Surface ◽  
Liquid Marbles ◽  
Capillary Rise Method

A capillary rise method was developed to study the effective surface tension of liquid marbles with invisible nanoparticle monolayers.

On the effective surface tension of powder-derived liquid marbles

2020 ◽  
Vol 367 ◽  
pp. 608-615 ◽  
Author(s):  
Renxian Wang ◽  
Xiaoguang Li
Keyword(s):  
Surface Tension ◽  
Effective Surface ◽  
Liquid Marbles

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.

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.

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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