Journal
BIOMACROMOLECULES
Volume 14, Issue 5, Pages 1251-1256Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bm400022h
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Funding
- Materials World Network [DFG AOBJ 569628]
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A strategy to light-trigger ionic cross-linking of alginates by incorporating a photosensitive Ca2+ cage (nitr-T) is presented. Upon irradiation, free Ca2+ was released, and this caused gelation of the alginate solution. Addition of Ca2+ on-demand allowed us to obtain homogeneous alginate (ALG) gels using concentrated initial ALG solutions (10%), not possible with other ionic gelation approaches. The cross-linking degree and derived mechanical properties of the hydrogel were modulated by the exposure dose. The light-mediated cross-linked alginate hydrogel displayed a significant improvement in the mechanical properties and homogeneity when compared to mixtures of alginate and soluble Ca2+ at comparable concentrations.
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