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A mesh-structured magnetically responsive 4D-printed flexible electronic patch
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DOI：10.1088/1361-665X/ae5b09.png)
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Abstract
En 中文
More and more wearable flexible electronic devices are being used for bioelectrical signal monitoring and related diseases under different conditions. At present, standard silver, silver chloride gel electrodes and hard electrodes often cause skin irritation due to heat dissipation, adhesion and structure mismatch when worn for a long time, or cause a large number of motion artefacts during motion detection. Here, we propose a mesh structure magnetically responsive 4D printed flexible electronic patch to collect static and dynamic bioelectrical signals for a long time, which is composed of a layer of customisable mesh flexible 4D printing substrate and a stretchable conductive pattern on the substrate. Flexible Substrates The mixed Ecoflex is fused with hexagonal boron nitride (E-hBN) and a mixture of Ecoflex with ferric tetroxide material (E-Fe3O4) through 3D printing technology to form a 4D flexible mesh substrate that can be controlled by a magnetic field. This configuration provides the required adhesion as needed, as well as excellent heat dissipation, sweat wicking, deformation ability, motion adaptability, and excellent signal-to-noise ratio (SNR). The SNR achieves 23.1 dB under optimal conditions, whilst the sensor area can reach 5 cm × 6 cm. At the same time, it can meet the customised needs of different shapes when inspecting different parts. In addition, by drawing a stretchable conductive pattern on a flexible substrate, we can accurately discriminate specific gestures by monitoring the muscle electrical signals of the forearm muscles.
Keywords:
flexible electronic patch
4D printing
magnetic responsiveness
bioelectrical signal monitoring
wearable electronics
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