A multistimuli-responsive recyclable poly(vinyl alcohol)/perylene imide hydrogel of high-performance piezoresistive sensors for human wearable devices
A multistimuli-responsive recyclable poly(vinyl alcohol)/perylene imide hydrogel of high-performance piezoresistive sensors for human wearable devices
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DOI：
10.1002/app.55595
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发表时间：
2024-04-27
影响因子：
3
通讯作者：
Yang，Xinguo
中科院分区：
文献类型：
--
作者：
Ji，Ao;Luo，Xingqi;Yang，Xinguo
人类在日常生活中受到多种因素的刺激，但统一收集这些信号是一项挑战。本研究提出了一种物理交联方法，利用氢键相互作用制备聚乙烯醇/苝酰亚胺（PVA/PI）水凝胶。制备的PVA/PI水凝胶具有良好的抗压强度（45 ~ 75 kPa）和粘附性能。室温下，伸长率可达400%左右。此外，PVA/PI水凝胶表现出较强的力学性能，最大伸长率为200%，离子电子电导率高达29.6 S m−1，即使在2 m HCl溶液中浸泡24 h。PVA/PI水凝胶中的水溶性PI具有环境响应性，在365 nm照射下的电流响应时间为100 ms，并且在不同的pH水平下具有可逆的荧光变化。PVA5/PI1和PVA5/PI1/HCl2（浓度分别为5 wt%、1 mg mL−1和2 mol L−1）水凝胶作为压力传感器具有高灵敏度（0.49和7.88 kPa−1）和宽压力监测范围（分别为0.088-30.67 kPa和0.088-18.67 kPa）。首个开发的可回收PVA/PI水凝胶有望用于可穿戴传感设备，并有望应用于复杂环境。
Multiple factors stimulate human beings in their daily lives, but uniformly collecting these signals is challenging. This study proposes a physically cross‐linked method that employs hydrogen bonding interactions to prepare poly(vinyl alcohol)/perylene imide (PVA/PI) hydrogels. The prepared PVA/PI hydrogels demonstrate favorable compressive strength (45–75 kPa) and adhesion properties. At room temperature, elongation reaches approximately 400%. Additionally, the PVA/PI hydrogels exhibit strong mechanical properties, with a maximum elongation of 200%, and high ionic‐electronic conductivity of 29.6 S m−1, even after being soaked in a 2 M HCl solution for 24 h. The water‐soluble PI in the PVA/PI hydrogels is environmentally responsive, resulting in a current response time of 100 ms under 365 nm irradiation, as well as reversible fluorescence changes across different pH levels. Both the PVA5/PI1 and PVA5/PI1/HCl2 (the concentrations were 5 wt%, 1 mg mL−1and 2 mol L−1, respectively) hydrogels demonstrate high sensitivity (0.49 and 7.88 kPa−1) and a wide pressure monitoring range (0.088–30.67 kPa and 0.088–18.67 kPa, respectively) as pressure sensors. The first developed recyclable PVA/PI hydrogel shows promise for use in wearable sensing devices and is expected to be applied in complex environments.