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- W2765442467 abstract "Herein, we describe a method to 3D print robust hydrogels and hydrogel composites via gel-in-gel 3D printing with catalytically activated polymerization to induce cross-linking. A polymerizable shear-thinning hydrogel ink with tetramethylethylenediamine as catalyst was directly extruded into a shear-thinning hydrogel support bath with ammonium persulfate as initiator in a pattern-wise manner. When the two gels came into contact, the free radicals generated by the catalyst initiated the free-radical polymerization of the hydrogel ink. Unlike photocuring, a catalyst-initiated polymerization is suitable for printing hydrogel composites of varying opacity, since it does not depend upon light penetration through the sample. The hydrogel support bath also exhibited a temperature-responsive behavior in which the gel “melted” upon cooling below 16 °C. Therefore, the printed object was easily removed by cooling the gel to a liquid state. Hydrogel composites with graphene oxide and multiwalled carbon nanotubes (MWCNTs) were successfully printed. The printed composites with MWCNTs afforded photothermally active objects, which have utility as stimuli-responsive actuators." @default.
- W2765442467 created "2017-11-10" @default.
- W2765442467 creator A5015322042 @default.
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- W2765442467 date "2017-11-09" @default.
- W2765442467 modified "2023-10-10" @default.
- W2765442467 title "Catalytically Initiated Gel-in-Gel Printing of Composite Hydrogels" @default.
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- W2765442467 doi "https://doi.org/10.1021/acsami.7b14177" @default.
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