Shape-tunable wax microparticle synthesis via microfluidics and droplet impact

Abstract

FIG. 1. Schematics of the experimental setup of molten wax droplet impacting a cooling aqueous medium.

Viscoplastic water entry

“…Such a regime is close to impact of immiscible viscous droplets, previously studied by many (e.g. see San Lee et al 2015;Thoraval et al 2016). Figure 9(b) shows an example of impact of a viscoplastic droplet of τ 0 = 35 Pa at U 0 = 0.65 m s −1 .…”

“…Regarding applications, the subject of this work is directly relevant to the production of capsules, beads and non-spherical particles (see e.g. Wang et al 1997;Beesabathuni et al 2015;Lee, Beesabathuni & Shen 2015) where droplets polymerize, passing through a liquid-air interface. Apart from its possible direct applications, the current study might give a broader perspective on the general physics of impact and penetration of deformable objects that undergo elasto-plastic deformations (Lush 1983;Peseux, Gornet & Donguy 2005).…”

A computational study of droplet-based bioprinting: Effects of viscoelasticity

“…Compound droplets have generally been studied in the context of Newtonian liquid systems [28][29][30][31][32][33][34][35] and only a few studies have considered the effects of viscoelasticity on the deformation and dynamics of compound droplets. [36][37][38] Toose et al 36 developed a boundary element method to model the dynamics of non-Newtonian compound droplets under axisymmetric flow conditions.…”

Anisotropic Microparticles from Microfluidics

“…[12][13][14] Furthermore, copious, complex-shaped particles have been proposed, including stomatocyte, rod-shaped particles, disk-shaped particles, biconcave, and so on. [15][16][17][18] Due to their special morphologies and complex components, anisotropic particles are capable of breaking through the limitation of general isotropic particles and combining different functions within a single particle entity, which is suggestive of their unpredicted and untapped potential in a host of fields, including display, sensing, drug delivery, cell culture, and so on. [19][20][21][22][23][24] For example, anisotropic particles, which are light composite materials that exhibit particular mechanical properties, have been designed by making use of the reinforcing capacity of fiber and platelets.…”