Simultaneous spreading and imbibition of blood droplets over porous substrates in the case of partial wetting

Chao, Tzu‐Chieh; Arjmandi-Tash, Omid; Das, Diganta Bhusan; Starov, Victor

doi:10.1016/j.colsurfa.2015.10.056

Cited by 17 publications

(36 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spreading parameters-L(t), l(t) and θ(t)-and the spreading time-t-are non-dimensionalized according to the method described by Chao et al [10] and plotted as shown in Figure 9. The liquid cap base radius and the wetted area radius are non-dimensionalized with respect to their maximum values.…”

Section: Non-dimensionalized Droplet Spreading Kineticsmentioning

confidence: 99%

“…The process of simultaneous spreading and imbibition of droplets of Newtonian and non-Newtonian liquids on dry porous substrates is relevant in several applications such as inkjet printing [1], dried spot sampling of blood and other biological liquids [2,3], softening of paper and textiles [4] and transdermal delivery of drugs and cosmetic ingredients [5,6]. The mechanism of such spreading processes has been investigated in earlier works for Newtonian liquids like water, silicone oil [7,8], and more recently also for non-Newtonian complex liquids like blood [9,10]. However, not much is known about the the spreading behavior on dry porous substrates of vesicle dispersions which form a commercially important class of complex liquids.…”

Section: Introductionmentioning

confidence: 99%

“…In previous works, based on the characteristic trends observed in time variation of spreading parameters, such droplet spreading processes have been classified qualitatively into two types, namely, the partial and complete wetting cases [10]. The mode of variation of spreading parameters which determines whether the spreading process is of the complete or the partial wetting type has been shown schematically in Figure 3A,B.…”

Section: Introductionmentioning

confidence: 99%

“…The spreading kinetics of the WE 15 vesicle dispersions is found to be faster than that of WE 18 vesicle dispersions on both the filter papers. The experimental results are scaled in non-dimensionalized form using the theory proposed by Chao et al [10] and compared with each other.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spreading and Imbibition of Vesicle Dispersion Droplets on Porous Substrates

Kumar

Kleinen

Venzmer

et al. 2019

Colloids and Interfaces

View full text Add to dashboard Cite

Vesicles have recently found widespread use in applications such as conditioning of textiles, paper and hair, as well as transdermal drug delivery. The mode of treatment in several such cases involves the application of droplets of aqueous dispersions of vesicles onto dry porous substrates like paper and textiles. One of the factors which affects the performance of such treatments is the rate at which the droplets spread and imbibe on the porous substrate. Depending upon the specific purpose of the treatment either a fast or slow droplet spreading kinetics could be desired. Therefore, it is important to have a good understanding of the droplet spreading process and the factors which influence it. In this work, an experimental investigation of the simultaneous spreading and imbibition of vesicle dispersion droplets on cellulose filter papers is carried out. Two different types of vesicles which are composed of similar lipid molecules but exhibit contrasting lipid bilayer phase behavior are used. Two different grades of filter papers with comparable porosities but different thicknesses are used as porous substrate. It is found that the droplet spreading behavior is of the “complete wetting” type on the thicker porous substrate, whereas it is of the “partial wetting” type on the thinner substrate. Furthermore, it is observed that the spreading of droplets containing vesicles with liquid-crystalline phase bilayers occurs faster than that of vesicles with solid-gel phase bilayers. The secondary radial penetration which commences after the initial droplet spreading is complete is also investigated and discussed.

show abstract

Section: Non-dimensionalized Droplet Spreading Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spreading and Imbibition of Vesicle Dispersion Droplets on Porous Substrates

Kumar

Kleinen

Venzmer

et al. 2019

Colloids and Interfaces

View full text Add to dashboard Cite

show abstract

“…the silane [26]. Figure 1 demonstrates the process, where alkoxy group attaches to the surface hydroxyl group and, after a suitable period of time, a network of silanol groups can be chemisorbed onto the metal membrane surface, via the natural oxide coating surface on the membrane.…”

Section: Hydrophobization Of Metal Membrane Surfacementioning

confidence: 99%

Water in oil emulsions from hydrophobized metal membranes and characterization of dynamic interfacial tension in membrane emulsification

Silva

Morelli

Dragosavac

et al. 2017

Colloids and Surfaces A: Physicochemical and Engineering Aspect

Self Cite

View full text Add to dashboard Cite

Hydrophobization of metal surfaces is reported based on silanization reactions. The aim was its application to metal porous membranes for the production of water in oil emulsions using a process known as membrane emulsification. A vertical oscillating membrane system was used to carry out drop formation experiments. It is shown that drop size can be tuned between 35 and 85 µm by changing just the surfactant concentration in the continuous phase. In addition, a method to determine the percentage of active pores during the membrane emulsification process is demonstrated. This method links knowledge acquired in the surfactant adsorption dynamics and drop expansion rate. Using this approach, pore velocity can be determined, which will help in determining the boundary between dripping and jetting from a pore. This study reinforces the importance of dynamic interfacial tension which must be considered in process design, and modelling purposes, particularly in two liquid phase systems using membranes such as membrane emulsification.

show abstract