School of Biomedical Engineering, Beijing Key Laboratory of Fundamental Research on Biomechanics in Clinical Application, Capital Medical University, No.10 Xitoutiao, You An Men Wai, Beijing, 100069, China.
Department of Biomedical Engineering, Shenzhen Key Laboratory of Smart Healthcare Engineering, Guangdong Provincial Key Laboratory of Advanced Biomaterials, Southern University of Science and Technology, No 1088, Xueyuan Rd., Xili, Nanshan District, Shenzhen, Guangdong, 518055, China.
Adv Sci (Weinh). 2022 Aug;9(23):e2202043. doi: 10.1002/advs.202202043. Epub 2022 Jun 26.
Welding usually involves high temperatures, toxic solvents, or conditions not compatible with human bodies, which severely limit the fusion of electronics and human tissues. To achieve direct welding of electronics on human skin, the intrinsically sticky conductors that can simultaneously achieve metal-grade electrical conductivity (≈41 7000 S m ), hydrogel-grade stretchability (>900% strain), and self-adhesiveness (1.8 N cm ) are reported. The sticky conductors composed of gallium indium alloy and acrylate polymer adhesives have a surface-enriched structure, which can form instant mechanical and electrical connections with different surfaces through gentle pressure without involving conditions that may damage human tissues. Based on the sticky conductors, the in situ welding of electronics on the skin is realized. To demonstrate the feasibility of in situ welding, electronic tattoos are achieved for movement monitoring. Intrinsically sticky electrodes that can resist drying and simultaneously deform with the skin for electrophysiological measurement are also developed.
焊接通常涉及高温、有毒溶剂或与人体不兼容的条件，这些严重限制了电子设备与人体组织的融合。为了实现电子设备在人体皮肤上的直接焊接，报道了一种具有内在粘性的导体，它可以同时实现金属级电导率（≈417000 S m）、水凝胶级拉伸性（>900%应变）和自粘性（1.8 N cm）。由镓铟合金和丙烯酸酯聚合物粘合剂组成的粘性导体具有表面富集结构，通过轻轻施压即可与不同表面形成瞬间机械和电气连接，而无需涉及可能损害人体组织的条件。基于这些粘性导体，实现了电子设备在皮肤上的原位焊接。为了验证原位焊接的可行性，实现了用于运动监测的电子纹身。还开发了具有内在粘性的电极，它们可以防止干燥，并与皮肤同时变形，用于进行生理测量。
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