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Shear‐Induced Fabrication of Multiple Parallel Alginate Gel Filaments Using Alginate–Polyethylene Glycol Blend

Takayama, Yuriko ; Kato, Norihiro

Macromolecular materials and engineering, 2018-04, Vol.303 (4), p.n/a [Periódico revisado por pares]

Weinheim: John Wiley & Sons, Inc

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  • Título:
    Shear‐Induced Fabrication of Multiple Parallel Alginate Gel Filaments Using Alginate–Polyethylene Glycol Blend
  • Autor: Takayama, Yuriko ; Kato, Norihiro
  • Assuntos: alginate ; Alginates ; aqueous two‐phase separation ; Assembly ; Calcium ions ; Capillary flow ; Filaments ; gel filaments ; Hydrogen bonding ; microfluidic device ; Phase separation ; Polyethylene glycol ; Polyols ; Shear ; shear‐induced structuring
  • É parte de: Macromolecular materials and engineering, 2018-04, Vol.303 (4), p.n/a
  • Descrição: A rigid assembly of alginates is formed in aqueous media primarily via hydrogen bonding between guluronic units. A flow of aqueous alginate solution in a co‐flow capillary can form alginate gel fibers by contact with Ca2+ ions in sheath flow. Mixing with polyols [e.g., polyethylene glycol (PEG)] facilitates the shaping of the alginate assembly because PEG disrupts the assembly of the extended alginate chains to instead form alginate–PEG complexes that exhibit shear‐thinning behavior. The shear‐induced fibrous domains of the globular alginate–PEG complexes can be partitioned by a PEG‐rich phase, resulting in multiple parallel alginate gel filaments when the strong ionic‐field‐induced PEG‐rich phase is adjusted and an alginate–PEG complex phase is used as the aqueous two‐phase separation system. Shear‐induced shaping of alginate–polyethylene glycol assembly enables the fabrication of thousands of parallel alginate domains without the need for a spinneret. The aligned continuous gel filaments appear when the fluid containing filamentous domains contacts Ca2+ ions acting as a cross‐linker using a co‐flow capillary. The filamentous domains are partitioned by polyethylene glycol, which is not responsive to Ca2+ ions.
  • Editor: Weinheim: John Wiley & Sons, Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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