Effect of temperature on the surface tension of diluted aqueous solutions of 1,2-hexanediol, 1,5-hexanediol, 1,6-hexanediol and 2,5-hexanediol

Romero, Carmen M.; Páez, Manuel J.; Miranda, Jesús A.; Hernández, D.; Oviedo, Luis

doi:10.1016/j.fluid.2007.05.029

Cited by 51 publications

(41 citation statements)

References 33 publications

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“…Although 1,2-hexanediol has surfactant-like properties due to its structure (Romero et al 2007), the dynamic surface tension of a dilute HD solution has not been reported to our knowledge. Our experiments show that there is a significant effect of surface age on both the surface tension and the viscosity: The surface tension decreases from 64 ± 1 mN/m for the µm-sized droplet (surface age between ≈ 200 µs and 10 ms) to 58 ± 1 mN/m for the mm-sized droplet (surface age of ≈ 5 s), and the viscosity increases from 1.1 ± 0.2 mPas (µm-sized droplet) to 1.5 ± 0.2 mPas (mm-sized droplet).…”

Section: Resultsmentioning

confidence: 91%

Ultrafast imaging method to measure surface tension and viscosity of inkjet-printed droplets in flight

Staat

Bos²,

Berg³

et al. 2016

Exp Fluids

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(Wijshoff 2010). The solvents carry the pigment particles to the medium and evaporate, solidify or crystallize, while the surfactants prevent wetting of the nozzle plate and promote spreading of the droplet after it impacts the underlying medium. In order to accurately control the droplet formation process, its in-flight dynamics, and subsequent interaction with the substrate, it is key to quantify the liquid properties of the droplet during the entire inkjet-printing process.The surface tension of a surfactant solution is determined by the concentration of adsorbed surfactant molecules at the liquid-air interface. When a fresh interface is formed, the surface tension equals that of the solvent (Ohl et al. 2003) and it decreases while surfactants adsorb at the interface, until reaching an equilibrium surfactant concentration. The associated timescales of the adsorption process are governed by the diffusion time of the surfactant molecules to diffuse from the so-called adsorption depth h to the interface (Ferri and Stebe 2000). This depth depends on the bulk surfactant concentration, the critical micelle concentration and the surface concentration of surfactants at equilibrium surface tension (Ferri and Stebe 2000). The typical diffusion time then scales with the surfactant diffusion coefficient D as τ D ∼ h 2 /D and ranges from milliseconds to days, depending on the surfactant type and surfactant concentration (Chang and Franses 1995;Eastoe and Dalton 2000). As the surfactants in inkjet printing must act before the ink dries, it is required that they adsorb as fast as possible. Droplet formation, however, is an extremely fast process that takes in the order of 10 µs, which is shorter than the approximately 100 µs that a droplet is typically in flight and much shorter than the time a droplet needs to evaporate, which is several seconds (Staat et al. 2016). A surfactant with a typical adsorption time scale of the order of milliseconds is considered a fast-adsorbing surfactant Abstract In modern drop-on-demand inkjet printing, the jetted droplets contain a mixture of solvents, pigments and surfactants. In order to accurately control the droplet formation process, its in-flight dynamics, and deposition characteristics upon impact at the underlying substrate, it is key to quantify the instantaneous liquid properties of the droplets during the entire inkjet-printing process. An analysis of shape oscillation dynamics is known to give direct information of the local liquid properties of millimeter-sized droplets and bubbles. Here, we apply this technique to measure the surface tension and viscosity of micrometer-sized inkjet droplets in flight by recording the droplet shape oscillations microseconds after pinch-off from the nozzle. From the damped oscillation amplitude and frequency we deduce the viscosity and surface tension, respectively. With this ultrafast imaging method, we study the role of surfactants in freshly made inkjet droplets in flight and compare to complementary techniques for dynamic surface tension me...

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Section: Resultsmentioning

confidence: 91%

Ultrafast imaging method to measure surface tension and viscosity of inkjet-printed droplets in flight

Staat

Bos²,

Berg³

et al. 2016

Exp Fluids

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“…Otro aspecto que llama la atención es que según nuestros datos el 1P sólo presenta un máximo, mientras que para (Glinski et al, 1996) este posee máximos dobles. La pendiente límite experimental fue determinada debido a que el signo y la magnitud de la pendiente reflejan el carácter hidrofóbico e hidrofílico del soluto (Romero y Páez, 2006;Romero et al 2007). Para todos los solutos considerados en este trabajo las pendientes límites son negativas y con valor bien diferenciable.…”

Section: Resultados Y Discusiónunclassified

Propiedades de Superficie en Soluciones Acuosas Diluidas de Alcoholes con Tres Carbonos

Páez¹,

Villegas²,

Alvis

2009

Inf. tecnol.

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*autor a quien debe ser dirigida la correspondencia ResumenSe determinó la tensión superficial de soluciones acuosas diluidas de alcoholes mono y polihidroxílicos a varias temperaturas usando el método de ascenso capilar. Los datos experimentales fueron usados para evaluar la entropía, la entalpía y la concentración superficial, la constante de enlazamiento y la pendiente límite. Se analizan el efecto de la temperatura, del tamaño de la cadena alquílica y de la posición de los grupos hidroxilos en el soluto expuestos al solvente. Los resultados muestran que la tensión superficial de las soluciones varía linealmente con la temperatura y que el carácter hidrofóbico de estos solutos, aumenta según el orden: 123PT, 13PD, 12PD y 1P. Adicionalmente se detectaron procesos de rompimiento de enlaces de las esferas de hidratación (entalpías positivas) y aumento del desorden molecular (entropías positivas), en la región superficial. Palabras clave: tensión superficial, hidrofobicidad, constante de enlazamiento, polioles Surface Properties of Aqueous Dilute Solutions of Alcohols with Three Carbons AbstractSurface tension of diluted aqueous solutions of mono and polyhydroxilic alcohols was determined at various temperatures using the method of capillary rising. The experimental data were used to evaluate surface entropies, enthalpies, and concentration, binding constants and the limiting slope. The effect of temperature, of the alkyl chain size and of the position of the hydroxyl groups in the solute that were exposed to the solvent are analyzed. The results show that the surface tension of the solutions varies lineally with the temperature and that the hydrophobic character of these solutes rises according to the order: 123PT, 13PD, 12PD y 1P. Additionally, bond breaking processes of the hydration spheres (positive enthalpies) and molecular disorder increase (positive entropies) in the surface region were detected.

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“…At a given solids content, the surface tension of an inorganic electrolyte solution decreased linearly with increasing temperature, but displayed a different activity with organic compounds; the relationship of surface tension and temperature is more complicated. Some researchers have reported that the surface tension over a certain temperature range increases as the temperature increases with a particular solids content (Gliński et al 2000;Romero et al 2007;Savinoa et al 2007). Figure 6 shows that along with the increase of solids content, surface tension first decreased gradually, but when solids content exceeded about 35%, the surface tension increased.…”

Section: Surface Tensionmentioning

confidence: 99%

Physical and Chemical Properties of Effluent from the Pre-Conditioning Refiner Chemical Alkaline Peroxide Mechanical Pulp (P-RC APMP) Process

Liu¹,

Huo²,

Yan³

et al. 2013

BioResources

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The properties of P-RC APMP effluent, including relative density, Baume degree, viscosity, surface tension, specific heat capacity, boiling point rise (BPR), and elemental contents of the effluent, were studied. Results indicated that relative density, viscosity, Baume degree, and solids content all displayed a direct proportional correlation; however, there was an inverse linear relationship between Baume degree and temperature. Viscosity rose sharply when the solids content was more than 40%. Surface tension gradually decreased with the rise of solids content. However, when the solids content was over 35%, it increased with an increase in solids content. Specific heat capacity was closely related to the solids content, but it was reduced with an increase in solids content. BPR was proportional to effluent solids content, especially when the solids content exceeded 30% with an uptrend in BPR.

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Effect of temperature on the surface tension of diluted aqueous solutions of 1,2-hexanediol, 1,5-hexanediol, 1,6-hexanediol and 2,5-hexanediol

Cited by 51 publications

References 33 publications

Ultrafast imaging method to measure surface tension and viscosity of inkjet-printed droplets in flight

Ultrafast imaging method to measure surface tension and viscosity of inkjet-printed droplets in flight

Propiedades de Superficie en Soluciones Acuosas Diluidas de Alcoholes con Tres Carbonos

Physical and Chemical Properties of Effluent from the Pre-Conditioning Refiner Chemical Alkaline Peroxide Mechanical Pulp (P-RC APMP) Process

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