College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning 530004, China.
Sensors (Basel). 2022 Apr 25;22(9):3281. doi: 10.3390/s22093281.
As a substitute for rigid sensors, flexible sensing materials have been greatly developed in recent years, but maintaining the stability of conductive fillers and the stability of micro-strain sensing is still a major challenge. In this experiment, we innovatively prepared a polyurethane-based cellulose acetate composite membrane (CA/TPU) with abundant mesopores through electrospinning. Then, we reduced graphene oxide (rGO)-as a conductive filler-and graphene oxide (GO)-as an insulating layer-which were successively and firmly anchored on the CA/TPU nanofiber membrane with the ultrasonic impregnation method, to obtain an rGO/GO@CA/TPU sensor with a GF of 3.006 under a very small strain of 0.5%. The flexibility of the film and its high sensitivity under extremely low strains enables the detection of subtle human motions (such as finger bending, joint motion, etc.), making it suitable for potential application in wearable electronic devices.
近年来，作为刚性传感器的替代品，柔性传感材料得到了极大的发展，但保持导电填料的稳定性和微应变传感的稳定性仍然是一个主要挑战。在本实验中，我们创新性地通过静电纺丝制备了一种具有丰富介孔的基于聚氨酯的醋酸纤维素复合膜（CA/TPU）。然后，我们通过超声浸渍法将还原氧化石墨烯（rGO）-作为导电填料-和氧化石墨烯（GO）-作为绝缘层-先后且牢固地锚定在 CA/TPU 纳米纤维膜上，得到在非常小的应变 0.5%下 GF 为 3.006 的 rGO/GO@CA/TPU 传感器。该薄膜的柔韧性及其在极低应变下的高灵敏度使得能够检测细微的人体运动（如手指弯曲、关节运动等），使其适用于潜在的可穿戴电子设备应用。
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