Microfluidic Printheads for Multimaterial 3D Printing of Viscoelastic Inks

Hardin, James O.; Ober, Thomas J.; Valentine, Alexander D.; Lewis, Jennifer A.

doi:10.1002/adma.201500222

Cited by 272 publications

(224 citation statements)

References 17 publications

(16 reference statements)

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“…We utilize Polyjet photopolymer technology that allows multi-material deposition [29][30][31][32] to 3D print compliance-tailored single-lap joints (SLJs), as shown in Figure 1a (top). The emergence of such multi-material and composite 3D printing technologies [33][34][35][36][37][38][39] facilitates the design of functionally graded designs at the sub-millimeter scale enabling fabrication of multi-material structures simultaneously exhibiting both strength and toughness, which are often difficult to achieve with homogeneous materials.…”

Section: Printing and Compliance-tailoring Of The Multimaterials Jointmentioning

confidence: 99%

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

et al. 2017

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Multilayered multi-material interfaces are encountered in an array of fields. Here, enhanced mechanical performance of such multi-material interfaces is demonstrated, focusing on strength and stiffness, by employing bondlayers with spatially-tuned elastic properties realized via 3D printing. Compliance of the bondlayer is varied along the bondlength with increased compliance at the ends to relieve stress concentrations. Experimental testing to failure of a tri-layered assembly in a single-lap joint configuration, including optical strain mapping, reveals that the stress and strain redistribution of the compliance-tailored bondlayer increases strength by 100% and toughness by 60%, compared to a constant modulus bondlayer, while maintaining the stiffness of the joint with the homogeneous stiff bondlayer. Analyses show that the stress concentrations for both peel and shear stress in the bondlayer have a global minimum when the compliant bond at the lap end comprises %10% of the bondlength, and further that increased multilayer performance also holds for long (relative to critical shear transfer length) bondlengths. Damage and failure resistance of multi-material interfaces can be improved substantially via the compliance-tailoring demonstrated here, with immediate relevance in additive manufacturing joining applications, and shows promise for generalized joining applications including adhesive bonding.

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Section: Printing and Compliance-tailoring Of The Multimaterials Jointmentioning

confidence: 99%

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

et al. 2017

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“…The 3D-printed lithium-ion batteries were successfully created using aqueous GO-based inks consisting of highly concentrated graphene 3D printing is an additive manufacturing (AM) technique that has drawn much attention from industry to academia for the development of advanced materials, architectures, and systems for a broad range of applications: energy, [ 1,2 ] biotechnology, [3][4][5] microfl uidics, [6][7][8] electronics, [ 9,10 ] and engineered composites. [11][12][13][14][15][16] Among the recently developed AM techniques, [ 17 ] extrusion-based (e.g., robocasting or direct ink writing) are the most versatile due to simple printing mechanisms and lowcost fabrication processes.…”

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confidence: 99%

Graphene Oxide‐Based Electrode Inks for 3D‐Printed Lithium‐Ion Batteries

et al. 2016

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All-component 3D-printed lithium-ion batteries are fabricated by printing graphene-oxide-based composite inks and solid-state gel polymer electrolyte. An entirely 3D-printed full cell features a high electrode mass loading of 18 mg cm(-2) , which is normalized to the overall area of the battery. This all-component printing can be extended to the fabrication of multidimensional/multiscale complex-structures of more energy-storage devices.

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“…For applications where a higher resolution is required, many techniques and products are available to adjust the rheological behavior of the PDMS precursor. [5,24,[43][44][45][46][47] The development of the hydrogel precursor for our extrusion printing was more demanding and required a balance between conductivity, stability, and rheological characteristics.…”

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3D Printing of Transparent and Conductive Heterogeneous Hydrogel–Elastomer Systems

et al. 2017

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A hydrogel–dielectric‐elastomer system, polyacrylamide and poly(dimethylsiloxane) (PDMS), is adapted for extrusion printing for integrated device fabrication. A lithium‐chloride‐containing hydrogel printing ink is developed and printed onto treated PDMS with no visible signs of delamination and geometrically scaling resistance under moderate uniaxial tension and fatigue. A variety of designs are demonstrated, including a resistive strain gauge and an ionic cable.

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Microfluidic Printheads for Multimaterial 3D Printing of Viscoelastic Inks

Cited by 272 publications

References 17 publications

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

Graphene Oxide‐Based Electrode Inks for 3D‐Printed Lithium‐Ion Batteries

3D Printing of Transparent and Conductive Heterogeneous Hydrogel–Elastomer Systems

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