Despite the rapid development of wearable electronics in sports rehabilitation and healthcare, traditional wearable electronics still have limitations such as poor personal protection, limited multifunctional sensing capabilities, and weak balancing between comfort and intelligence. This study introduces a breathable, comfortable, and protective Leather/MXene-AgNWs/Aerogel (LMAA) wearable electronic that combines stress-humidity dual-modal sensing, impact attenuation, and temperature management. The Janus porous integration is realized by heterogeneity modulating the natural three-dimensional woven leather structure and the isotropic porous aerogel (with air permeability of 3 mm/s and water vapor transmission of 877.6 g·m −2 ·d −1 ). Through optimizing the sandwiched MXene-AgNWs conductive layer and hierarchical structure, the LMAA can provide stress deformation detection via resistance variation (>10,000 cycles) and environmental humidity monitoring through capacitance changes (1.4 % RH −1 sensitivity, R 2 > 0.997), together with multifunctional personal protection, such as anti-impact (attenuate>30 % of impact force), joule heating (reaching 57.1 °C at 2.5 V), electromagnetic interference shielding (SE T = 38.3 dB), and antibacterial properties. Furthermore, a prototype smart knee pad showcases real-time monitoring of joint movement and skin moisture, along with therapeutic heating capabilities. By integrating machine learning, the smart knee pad successfully collects and recognizes various running data. LMAA offers a comfortable and durable solution for sports rehabilitation and health monitoring applications.
Based on the hydrolysis and dehydration of boroxine and boric acid, a boroxine was prepared from 3-Aminobenzeneboronic acid (3-ABBA). Then a novel boroxine-based self-healing polyurethane (BPU) which has a repeatable adhesive property under mild conditions was synthesized by using boroxine and polyurethane prepolymer . The chemical structure and thermal property were confirmed by Fourier transform infrared spectroscopy (FTIR) and thermal gravimetric analysis (TGA). When the mole ratio of isophorone diisocyanate (IPDI) and polypropylene glycol 2000 (PPG 2000) was 3:0, the mechanical strength and elongation at break of BPU film reached 1.63 MPa and 1577.79%. Meantime, BPU could be healed under the action of a water molecule and the self-healing rate was up to 92.02%. BPU film took on excellent self-healing property under mild conditions. In addition, BPU film could easily dissolve in N, N-dimethylacetamide (DMAC) to become an adhesive. The bonding strength of BPU adhesive to leather substrate reached 1.73 MPa, which was nearly the same as the standard value of adhesive used for shoes and bags. Interestingly, after the bonded leather was separated into two parts, they can adhere together again by spraying water on the bonding part. Through healing the bonding strength of BPU adhesive was still 1.65 MPa. Therefore, BPU is characterized by excellent repeatable adhesive property which has great potential application.
危险品化学品经营许可证（带存储）