Nowadays, high-pressure sensors are broadly utilized in manufacturing and applications for ensuring safe production and preventing failures. However, present high-pressure sensors are mainly fabricated by high-strength metal and cement, which are too heavy or easy-corrosive to satisfy long-term usage. Polymer piezoresistive materials have great potential due to their stability and light weight, but achieving high strength and durability at the same time remains a serious challenge. In this work, a high-strength pressure sensor is fabricated by epoxy resin/carbon fiber (EP/CF) composite, where CF builds a conductive network as a reinforcing phase and EP provides a durable and light-weight base phase. The conductive mechanism based on stress-induced structure has been elucidated, and the performance of related sensors in various conditions is revealed. The lightweight (∼1.28 g/cm) pressure sensor manifests a wide sensing response range from 22 kPa to 80 MPa. Moreover, the durability of this novel pressure sensor is verified by repeating loading and unloading at a high pressure of 10 MPa for more than 3500 cycles. Meanwhile, the high temperature and water resistance are furtherly confirmed, where EP/CF composites exhibits excellent cycling stability (10 MPa, >1000 cycles) after heating (100 °C) or soaking in water. Attributed to the comprehensive performance of high-strength, ultrawide detection range, durability and light weight, EP/CF composites are applied for road safety monitoring and deep-sea operation, showing wide application prospects in high-pressure monitoring field.

中文翻译：

---

基于应力诱导结构的超宽传感范围、超耐用、高强度环氧/碳纤维复合材料传感器

如今，高压传感器广泛应用于制造和应用中，以确保安全生产和防止故障。然而，目前的高压传感器主要由高强度金属和水泥制成，重量过重或易腐蚀，无法满足长期使用。聚合物压阻材料由于其稳定性和重量轻而具有巨大的潜力，但同时实现高强度和耐用性仍然是一个严峻的挑战。在这项工作中，高强度压力传感器由环氧树脂/碳纤维（EP/CF）复合材料制成，其中CF构建导电网络作为增强相，EP提供耐用且轻质的基础相。阐明了基于应力诱导结构的导电机制，并揭示了相关传感器在各种条件下的性能。轻质（∼1.28 g/cm）压力传感器具有从 22 kPa 到 80 MPa 的宽传感响应范围。此外，通过在10 MPa的高压下重复加载和卸载超过3500次循环，验证了这种新型压力传感器的耐用性。同时，其耐高温和耐水性也得到进一步证实，其中EP/CF复合材料在加热（100℃）或浸泡在水中后表现出优异的循环稳定性（10 MPa，>1000次循环）。 EP/CF复合材料凭借高强度、超宽探测范围、耐用、轻质等综合性能，应用于道路安全监测和深海作业，在高压监测领域展现出广阔的应用前景。