Suspensions Designed for Direct Ink Writing

Direct ink writing is a novel route for three-dimensional complex structures. Research progress of suspensions for direct ink writing is reviewed in this paper. These suspensions are divided to self- and assistant-solidification suspensions according to their solidification feature. Rheological characterizations and design principles of self-solidification suspensions are analyzed, and typical suspensions are concluded. Design principles and solidification mode of assistant-solidification suspensions are also analyzed, including typical assistant-solidification suspensions and solidification mode. Finally, the research tendency of suspensions for direct ink writing is discussed.