Abstract
AbstractA 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.
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