Preparation and analysis of oil-in-water emulsions with a narrow droplet size distribution using Shirasu-porous-glass (SPG) membranes

The impact of mass transfer and interfacial expansion rate on droplet size in membrane emulsification processes

“…The step size for the step independent result was found to be approximately 5000/s and was used in subsequent calculations. The model was verified by comparing droplet formation times reported experimentally in the literature [44] to the droplet formation times seen in the simulations using the MATLAB program. The results of this are presented in Table 3.…”

Production of O/W emulsions using SPG membranes, ceramic α-aluminium oxide membranes, microfluidizer and a silicon microchannel plate—a comparative study

“…In order to avoid contact between two rigid neighboring droplets at the pore openings, the fraction of active pores in the case of the square pore arrangement must be [22]. The mean porosity of the SPG membranes used in this work was 0.58 and the mean droplet/pore size ratio was typically in the range of 3-4, as shown in Figs 8 and 10.…”

“…in m -1 and m, respectively. According to our previous study [22], the mean wall porosity of the SPG membranes used here was  = 0.58. Thus, the mean tortuosity factor of the pores can be calculated from the Hagen-Poiseuille law using the equation: …”

“…11, at the same p tm /p cap ratio the proportion of simultaneously active pores was higher for the -Al 2 O 3 than for SPG membrane, due to much smaller thickness of active layer in the former case (20- 40 vs. 650 m). The proportion of simultaneously active pores was calculated using the equation given in our previous work [22].…”

Manufacture of large uniform droplets using rotating membrane emulsification

“…Several single-drop technologies have been developed for generating uniform droplets, such as injection of liquid through a capillary into another co-flowing immiscible fluid [3,4], penetration of dispersed phase through microfabricated parallel silicon channels [5] or interconnected channel network in microfluidic devices [6,7], and injection of dispersed phase through microporous membranes of different nature (glass, ceramic, metallic, polymeric) [8][9][10][11][12][13][14]. Production of various particulate products, such as microspheres and microcapsules, using membrane emulsification routes was recently reviewed by Vladisavljević and Williams [15].…”