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Keywords:

  • vascular;
  • hydrogel;
  • gelatin;
  • shellac;
  • microfiber
Thumbnail image of graphical abstract

3D microfluidic networks are fabricated in a gelatin hydrogel using sacrificial melt-spun microfibers made from a material with pH-dependent solubility. The fibers, after being embedded within the gel, can be removed by changing the gel pH to induce dissolution. This process is performed in an entirely aqueous environment, avoiding extreme temperatures, low pressures, and toxic organic solvents.