References | Zhang et al., 2007 [61] | Akbari and Pirbodaghi, 2014 [3] | Yu et al., 2019 [56] | Utech et al., 2015 [49] | |
---|---|---|---|---|---|
Droplet generation | Concentration of Na-alginate | 2 wt% | 1,5 wt% | 2 w/v% | 2 wt% |
Continuous fluid | Soybean oil | Fluorocarbon oil | Mineral oil | Fluorinated carbon oil | |
Use of surfactant | Span 80 | Fluorinated surfactant | Span 80 | Biocompatible surfactant | |
Geometry | Flow-focusing | Flow-focusing | Flow-focusing | Flow-focusing | |
Microfluidic material | PDMS chip | PDMS chip | PDMS chip | PDMS chip | |
Internal gelation by mixing Na-alginate and water-insoluble or weakly soluble cross-linkers | Cross-linkers | CaCO3 (0,1 wt%) | CaCO3 (35 mM) | CaCO3 (200 mM) | Ca-EDTA (50 mM) |
Mixing | Off-line, before droplet generation | Before droplet generation | Off-line, before droplet generation | Off-line, before droplet generation | |
Gelation by acid addition | In continuous fluid | In continuous fluid | In collecting fluid | In continuous fluid |