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Fabrication of Shape Controllable Janus Alginate/pNIPAAm Microgels via Microfluidics Technique and Off-Chip Ionic Cross-Linking
- Hu, Yuandu, Wang, Shibo, Abbaspourrad, Alireza, Ardekani, Arezoo M.
- Langmuir 2015 v.31 no.6 pp. 1885-1891
- acetates, alginates, barium, crosslinking, droplet size, droplets, glycerol, image analysis
- A novel method to fabricate shape controllable alginate/pNIPAAm complex microgels is reported. Monodisperse alginate/pNIPAAm droplets are created via microfluidics and cross-linked in different concentrations of hot glycerol/barium acetate water solutions. By changing the initial droplet size and glycerol concentration of the collecting solution, the resultant microgel shape and surface details can be systematically tuned. High-speed imaging is used to visualize and explain the microgel formation process.