Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, China.
Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an 710049, China.
Mater Horiz. 2023 Jun 6;10(6):2096-2108. doi: 10.1039/d3mh00192j.
Flexible biosensors made from conductive hydrogels have shown tremendous potential in health management and human-machine interfaces. Nevertheless, it remains challenging to fabricate conductive hydrogels with robust resilience and long-term stability. Herein, we report a nanocomposite conductive hydrogel prepared through one-pot radical polymerization of 3-acrylamidophenylboronic acid (APBA) and acrylamide (AM) in the presence of LAPONITE® XLG nanosheet (XLG) stabilized carbon nanotubes (CNTs). Owing to the existence of various non-covalent interactions within the network (B-N coordination, hydrogen bond, and polymer chain entanglement), the hydrogels feature splendid mechanical properties with a tensile strength of 252-323 kPa, fracture strain of 880-1200%, Young's modulus of 48-50 kPa and fracture energy of 911-1078 J m, and exhibit robust elasticity and fatigue resistance during 1000 consecutive tensile and compressive cycles. The hydrogels show remarkable sensing performances (gauge factor up to 9.43) and a broad sensing range of strain (1-300%) and pressure (1-80 kPa), enabling reliable and accurate monitoring of large and tiny motions in daily human life. Moreover, the conductive hydrogels could not only accelerate skin incision healing but also act as smart wearable sensors to monitor the skin wound healing process by detection of local temperature changes.
由导电水凝胶制成的柔性生物传感器在健康管理和人机接口方面显示出巨大的潜力。然而，制造具有强大弹性和长期稳定性的导电水凝胶仍然具有挑战性。在此，我们报告了一种通过一锅自由基聚合 3-丙烯酰胺基苯硼酸（APBA）和丙烯酰胺（AM）在 LAPONITE® XLG 纳米片（XLG）稳定的碳纳米管（CNTs）存在下制备的纳米复合导电水凝胶。由于网络内存在各种非共价相互作用（B-N 配位、氢键和聚合物链缠结），水凝胶具有出色的机械性能，拉伸强度为 252-323 kPa，断裂伸长率为 880-1200%，杨氏模量为 48-50 kPa，断裂能为 911-1078 J m，并在 1000 次连续拉伸和压缩循环中表现出强大的弹性和耐疲劳性。水凝胶具有出色的传感性能（高达 9.43 的应变系数）和广泛的应变（1-300%）和压力（1-80 kPa）传感范围，能够可靠准确地监测日常生活中人体的大运动和小动作。此外，导电水凝胶不仅可以加速皮肤切口愈合，还可以作为智能可穿戴传感器通过检测局部温度变化来监测皮肤伤口愈合过程。
