Hydrogel-based strain sensors have attracted increasing interest due to their high biocompatibility and stretch-ability. However, it is still a challenge to prepare hydrogel-based strain sensors with fast self-healing, high repeatability, and biocompatibility. Here, interpenetrating network (IPN) hydrogels based on natural polysaccharides were fabricated by introducing borate and hydrogen bonds. The IPN hydrogels with appropriate gellan gum (Gg), borax, and guar gum (GG) concentrations show good tensile properties, i.e., the fracture strength and elongation at break could reach to 28.2 kPa and 216%, respectively. Due to the dynamic reversibility of borate and hydrogen bonds, the IPN hydrogels also exhibit excellent self-healing properties. In addition, the introduction of borate ions allows the IPN hydrogels to conduct electricity. Therefore, the deformation of the IPN hydrogels can produce an electrical signal with excellent repeatability and reliability. As a result, the IPN hydrogels with excellent mechanics, self-healing and electrical conductivity may have great potential in human motion monitoring, intelligent wearable devices, etc.

基于水凝胶的应变传感器由于其高生物相容性和可拉伸性而引起了越来越多的关注。然而，制备具有快速自我修复，高重复性和生物相容性的基于水凝胶的应变传感器仍然是一个挑战。在这里，通过引入硼酸酯和氢键，制备了基于天然多糖的互穿网络（IPN）水凝胶。具有适当吉兰糖胶（Gg），硼砂和瓜尔豆胶（GG）浓度的IPN水凝胶显示出良好的拉伸性能，即断裂强度和断裂伸长率分别可以达到28.2 kPa和216％。由于硼酸酯和氢键的动态可逆性，IPN水凝胶还表现出出色的自修复性能。此外，引入硼酸根离子可使IPN水凝胶导电。所以，IPN水凝胶的变形可以产生具有出色的可重复性和可靠性的电信号。因此，具有优异的力学性能，自修复性和导电性的IPN水凝胶在人体运动监测，智能可穿戴设备等方面可能具有巨大的潜力。