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When printing dense colloidal suspensions, how do rotational rheometry compare to the direct ink write prosess?

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Rotational rheometry and direct ink writing processes play crucial roles in printing dense colloidal suspensions. Rotational rheometry, as studied in Context_1 and Context_2, explores the response of suspensions to shear rotations, revealing transient decreases in resistance to shear and the impact of solid volume fraction on orthogonal shear stress. On the other hand, direct ink writing, discussed in Context_3 and Context_5, focuses on developing a universal criterion for printing dense ceramic objects by correlating rheological properties with printability requirements. This process involves measuring rheological evolution, identifying physical parameters for printability, and defining a dimensionless number (Ξ) to predict deformation and determine printability. While rotational rheometry delves into the behavior of suspensions under shear rotations, direct ink writing provides a systematic approach to designing printable inks for dense materials, ensuring high fidelity in printed shapes and competitive material properties.

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Open access•Journal Article Suspensions Designed for Direct Ink Writing Wang Xiao 01 Jan 2015-Journal of Inorganic Materials 5 Citations	Rotational rheometry is used to characterize rheological properties in dense colloidal suspensions, while direct ink writing is a method for creating complex 3D structures using tailored suspensions.
Open access•Journal Article•DOI 3D printing with 2D colloids: designing rheology protocols to predict ‘printability’ of soft-materials Andrew Corker, Henry C.-H. Ng, Robert J. Poole, Esther García-Tuñón - Show less +3 more 06 Feb 2019-Soft Matter 97 Citations	Rotational rheometry assesses rheological properties, while Direct Ink Writing (DIW) predicts 'printability' of dense colloidal suspensions based on network stiffness, flow stress, and flow transition index.
Open access•Journal Article•DOI Rheology of Dense Suspensions under Shear Rotation 16 Mar 2023-Physical Review Letters 1 Citations	Rotational rheometry in dense suspensions reveals transient viscosity drops under shear rotations, contrasting with the direct ink write process used in printing without direct comparison in the paper.
Open access•Journal Article•DOI Linking Rheology and Printability for Dense and Strong Ceramics by Direct Ink Writing. Amin M’Barki, Lydéric Bocquet, Adam J. Stevenson - Show less +2 more 20 Jul 2017-Scientific Reports 189 Citations	Rotational rheometry assesses rheological properties, while direct ink writing process correlates rheology with printability using a dimensionless criterion Ξ for dense ceramics.
Journal Article•DOI Rheology of Dense Suspensions under Shear Rotation. F. Blanc, François Peters, Jurriaan J. J. Gillissen, Michael E. Cates, S. Bosio, Camille Benarroche, Romain Mari - Show less +6 more 05 Dec 2022-Physical Review Letters 2 Citations	Rotational rheometry in dense suspensions shows a transient viscosity drop under shear rotation, contrasting with direct ink write processes, indicating different rheological behaviors in printing applications.

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