Biomimetic Patch with Wicking-Breathable and Multi-mechanism Adhesion for Bioelectrical Signal Monitoring

Abstract

Wearable bioelectrical monitoring devices can provide long-term human health information such as electrocardiogram and other physiological signals. It is a crucial part of the remote medical system. These can provide prediction for the diagnosis and treatment of cardiovascular disease and access to timely treatment. However, the patch comfort of the wearable monitoring devices in long-term contact with the skin have been a technical bottleneck of the hardware. In this study, the biomimetic patch with wicking-breathable and multi-mechanism adhesion performance to achieve adaptability and comfortability to human skin has been reported. The patch was designed based on a conical through-hole and hexagonal microgroove to directionally transport sweat from skin to air which gives the patch the breathable performance. The breathable and drainage capability of the biomimetic patch was experimentally verified by analyzing the conical through-hole and hexagonal microgroove with the structural mechanism of wicking. Multi-mechanism adhesion of the Ag/Ni microneedle array and PDMS-t adhesion material ensures the stability of patch signal acquisition. This study provides a new way for enhancing the breathability and adaptability of the patch to realize accurate bioelectrical signal monitoring under sweat conditions on human skin.

Harmonizing Thickness and Permeability in Bone Tissue Engineering: A Novel Silk Fibroin Membrane Inspired by Spider Silk Dynamics

“…Laplace pressure is influenced by a conical shape with a gradient in curvature, as outlined in Equation S2 (Supporting Information). [ 28 ] The local radius of curvature for the liquid surface near the i‐surface within the CSMP is denoted as r i , whereas the corresponding value near the e‐surface within the CSMP is represented as r e . When liquid is transported from i‐surface to e‐surface $$\mathop \sum \nolimits^ P\ = {P}_i\ + {P}_e$$.…”

A sweat-pH-enabled strongly adhesive hydrogel for self-powered e-skin applications

“…and adhere less to sweaty skin due to the formation of a sweat film with low shear viscosity on the skin surface, which disrupts molecular interactions between the skin and the adhesive, [12][13][14][15][16] leading to detachment of the electrode from the skin. For example, commercial gel electrodes tend to slip off sweaty skin, resulting in false and even missing signals.…”

“…However, sweating, which is inevitable under real-life conditions, especially during prolonged monitoring and exercise, is seldom considered; such conditions require hydrogel-based on-skin electrodes that remain conformable and adhesive in the presence of sweat. 11 Unfortunately, current non-invasive electrodes are poorly conformable and adhere less to sweaty skin due to the formation of a sweat film with low shear viscosity on the skin surface, which disrupts molecular interactions between the skin and the adhesive, 12–16 leading to detachment of the electrode from the skin. For example, commercial gel electrodes tend to slip off sweaty skin, resulting in false and even missing signals.…”

Superhydrophobic Flexible Strain Sensors Constructed Using Nanomaterials: Their Fabrications and Sustainable Applications

“…Zhang et al [92] developed a biomimetic patch that enhances the adaptability and comfort for human skin through its breathability and multi-mechanism adhesion properties. The patch incorporates conical through-holes and hexagonal microgrooves to facilitate the directional transport of sweat from the skin to the air, resulting in improved air permeability.…”