Soft Shear and Compressive Contact Stresses Sensor With Conductive Microfluidic Channels Fabricated by Additive Manufacturing

Putra, Ketut B.; Tian, Xiaoqing; Shih, Albert J.

doi:10.1109/jsen.2022.3159452

IEEE Sensors J.

2022

DOI: 10.1109/jsen.2022.3159452

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Soft Shear and Compressive Contact Stresses Sensor With Conductive Microfluidic Channels Fabricated by Additive Manufacturing

Ketut B. Putra

Xiaoqing Tian

Albert J. Shih

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Cited by 3 publications

References 51 publications

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Ternary Liquid Metal Polymer Composite for Stretchable Electronics

Luo,

Zhou

2023

Adv Materials Technologies

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The small strain characteristics of the traditional flexible conductive composites hinder their realization of skin‐like properties and multi‐scenario applications. The value of liquid metal (LM)‐based elastomers is demonstrated in flexible electronics. Attempts in this area include the development of multifunctional LM‐based elastomers with controllable morphology, superior mechanical performances, and excellent stability. In this work, an efficient strategy is proposed to achieve the fast preparation of the LM patch by uniformly distributing eutectic gallium–indium–tin alloy in deionized water and by constructing the LM‐iron particles‐Ecoflex (LMIE) ternary composite system. In this study, the fabricated LMIE large strain sensor exhibits high sensitivity (the gage factor (GF) = 0.98 when strain ranges from 0% to 60%; GF = 1.91 when strain ranges from 60% to 100%), high linearity (correlation coefficient (R2) = 0.96 when strain ranges from 0% to 60%; R2 = 0.99 when strain ranges from 60% to 100%), a wide strain range of detection (e.g., 1%–100%) and breaking elongation (e.g., 450%), a fast response time (80 ms), excellent repeatability and stability. This work exhibits the excellent potential of multifunctional liquid metal composites in wearable electronics and prediction devices of structural collapse.

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Ternary Liquid Metal Polymer Composite for Stretchable Electronics

Luo,

Zhou

2023

Adv Materials Technologies

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Semi-analytical and numerical models to predict the extrusion force for silicone additive manufacturing, as a function of the process parameters

Pricci

Ovy

Stano

et al. 2023

Additive Manufacturing Letters

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Additively manufactured micro-lattice dielectrics for multiaxial capacitive sensors

Berman,

Hsiao,

Root

et al. 2024

Sci. Adv.

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Soft sensors that can perceive multiaxial forces, such as normal and shear, are of interest for dexterous robotic manipulation and monitoring of human performance. Typical planar fabrication techniques have substantial design constraints that often prohibit the creation of functionally compelling and complex architectures. Moreover, they often require multiple-step operations for production. Here, we use an additive manufacturing process based on continuous liquid interface production to create high-resolution (30-micrometer) three-dimensional elastomeric polyurethane lattices for use as dielectric layers in capacitive sensors. We show that the capacitive responses and sensitivities are highly tunable through designs of lattice type, thickness, and material-void volume percentage. Microcomputed tomography and finite element simulation are used to elucidate the influence of lattice design on the deformation mechanism and concomitant sensing behavior. The advantage of three-dimensional printing is exhibited with examples of fully printed representative athletic equipment with integrated sensors.

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Soft Shear and Compressive Contact Stresses Sensor With Conductive Microfluidic Channels Fabricated by Additive Manufacturing

Cited by 3 publications

References 51 publications

Ternary Liquid Metal Polymer Composite for Stretchable Electronics

Ternary Liquid Metal Polymer Composite for Stretchable Electronics

Semi-analytical and numerical models to predict the extrusion force for silicone additive manufacturing, as a function of the process parameters

Additively manufactured micro-lattice dielectrics for multiaxial capacitive sensors

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