Interdisciplinary Materials Research Center, Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, P.R. China.
Angew Chem Int Ed Engl. 2023 Jan 2;62(1):e202213952. doi: 10.1002/anie.202213952. Epub 2022 Nov 30.
Broad-range-response pressure-sensitive wearable electronics are urgently needed but their preparation remains a challenge. Herein, we report unprecedented bioinspired wearable electronics based on stretchable and superelastic reduced graphene oxide/polyurethane nanocomposite aerogels with gradient porous structures by a sol-gel/hot pressing/freeze casting/ambient pressure drying strategy. The gradient structure with a hot-pressed layer promotes strain transfer and resistance variation under high pressures, leading to an ultrabroad detection range of 1 Pa-12.6 MPa, one of the broadest ranges ever reported. They can withstand 10 000 compression cycles under 1 MPa, which can't be achieved by traditional flexible pressure sensors. They can be applied for broad-range-response electronic skins and monitoring various physical signals/motions and ultrahigh pressures of automobile tires. Moreover, the gradient aerogels can be used as high-efficient gradient separators for water purification.
宽响应范围压敏可穿戴电子产品是急需的，但它们的制备仍然是一个挑战。在此，我们通过溶胶-凝胶/热压/冷冻铸造/常压干燥策略，报告了前所未有的基于可拉伸和超弹性还原氧化石墨烯/聚氨酯纳米复合气凝胶的仿生可穿戴电子产品，该气凝胶具有梯度多孔结构。具有热压层的梯度结构促进了高压下的应变传递和电阻变化，从而实现了超宽的检测范围为 1 Pa-12.6 MPa，是报道过的最宽范围之一。它们可以在 1 MPa 下承受 10000 次压缩循环，这是传统的柔性压力传感器无法实现的。它们可用于宽响应范围的电子皮肤以及监测各种物理信号/运动和汽车轮胎的超高压力。此外，梯度气凝胶可用作高效梯度分离器用于水净化。
