A novel multi-functional sensor was fabricated with multi-layer and internal 3D network structure via two-step assembly that mimicked the natural hierarchical skin model. The collagen aggregates (CA) derived from chromium-containing waste leather were used as the substrate while polyaniline (PANi)-acidified multi-walled carbon nanotube (H-MWNTs) composites were employed as the conductive materials (P-M). The multi-functional flexible sensor was assembled resulting in multi-dimensional recognition ability (including compressing (gauge factor (GF) = 5.2), bending (GF = 9.2), and twisting strains), fast response (110 ms), and broad dynamic response range (28 Pa–100 KPa). Notably, the multi-functional sensor had superior sensing performance to humidity and comfortable wearing performance. Owing to these merits, the fabricated sensor with multi-functionality and intelligence can potentially act as the artificial skin for robot hand to detect weak pressure and humidity changes, displaying great promise for applications in the fields of real-time health monitoring, biomedical, and intelligent robots.

通过模仿自然分层皮肤模型的两步组装，制造了具有多层和内部3D网络结构的新型多功能传感器。衍生自含铬废皮革的胶原聚集体（CA）被用作基材，而聚苯胺（PANi）酸化的多壁碳纳米管（H-MWNTs）复合材料被用作导电材料（PM）。组装了多功能柔性传感器后，具有多维识别能力（包括压缩（量表系数（GF）= 5.2），弯曲（GF = 9.2）和扭曲应变），快速响应（110 ms）和宽动态范围响应范围（28 Pa-100 KPa）。值得注意的是，多功能传感器具有优于湿度的舒适感和舒适的佩戴性能。由于这些优点，