Multifunctional 3D printing of heterogeneous hydrogel structures
Nadernezhad, Ali and Khani, Navid and Akdeniz Skvortsov, Gözde and Toprakhisar, Burak and Bakırcı, Ezgi and Menceloğlu, Yusuf Z. and Ünal, Serkan and Koç, Bahattin (2016) Multifunctional 3D printing of heterogeneous hydrogel structures. Scientific Reports, 6 . ISSN 2045-2322
Official URL: http://dx.doi.org/10.1038/srep33178
Multimaterial additive manufacturing or three-dimensional (3D) printing of hydrogel structures provides the opportunity to engineer geometrically dependent functionalities. However, current fabrication methods are mostly limited to one type of material or only provide one type of functionality. In this paper, we report a novel method of multimaterial deposition of hydrogel structures based on an aspiration-on-demand protocol, in which the constitutive multimaterial segments of extruded filaments were first assembled in liquid state by sequential aspiration of inks into a glass capillary, followed by in situ gel formation. We printed different patterned objects with varying chemical, electrical, mechanical, and biological properties by tuning process and material related parameters, to demonstrate the abilities of this method in producing heterogeneous and multi-functional hydrogel structures. Our results show the potential of proposed method in producing heterogeneous objects with spatially controlled functionalities while preserving structural integrity at the switching interface between different segments. We anticipate that this method would introduce new opportunities in multimaterial additive manufacturing of hydrogels for diverse applications such as biosensors, flexible electronics, tissue engineering and organ printing.
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