Bionic artificial skin which imitates the features and functions of human skin, has broad applications in wearable human-machine interfaces. However, equipping artificial materials with skin-like mechanical properties, self-healing ability, and high sensitivity remains challenging. Here, inspired by the structure of human skin, an artificial skin based on ionogel composites with tailored mechanical properties and robust interface is prepared. Combining finite element analysis and direct ink writing (DIW) 3D printing technology, an ionogel composite with a rigid skeleton and an ionogel matrix is precisely designed and fabricated, realizing the mechanical anisotropy and nonlinear mechanical response that accurately mimic human skin. Robust interface is created through co-curing of the skeleton and matrix resins, significantly enhancing the stability of the composite. The realization of self-healing ability and resistance to crack growth further ensure the remarkable durability of the artificial skin for sensing application. In summary, the bionic artificial skin mimics the characteristics of human skin, including mechanical anisotropy, nonlinear mechanical response, self-healing capability, durability and high sensitivity when applied as flexible sensors. These strategies provide strong support for the fabrication of tissue-like materials with adaptive mechanical behaviors.

中文翻译：

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基于具有定制力学和稳健接口的自修复离子凝胶复合材料的仿生人造皮肤


仿生人造皮肤模仿人类皮肤的特征和功能，在可穿戴人机界面中具有广泛的应用。然而，赋予人造材料类似皮肤的机械性能、自愈能力和高灵敏度仍然具有挑战性。在这里，受人类皮肤结构的启发，制备了一种基于离子凝胶复合材料的人造皮肤，具有定制的机械性能和坚固的界面。结合有限元分析和直接墨水书写（DIW）3D打印技术，精确设计和制造了具有刚性骨架和离子凝胶基体的离子凝胶复合材料，实现了精确模仿人体皮肤的机械各向异性和非线性机械响应。通过骨架和基体树脂的共固化形成坚固的界面，显着增强复合材料的稳定性。自愈能力和抗裂纹扩展的实现进一步确保了用于传感应用的人造皮肤卓越的耐用性。综上所述，仿生人造皮肤模仿人类皮肤的特性，包括机械各向异性、非线性机械响应、自愈能力、耐用性和用作柔性传感器时的高灵敏度。这些策略为制造具有自适应机械行为的类组织材料提供了强有力的支持。