可拉伸/高透明/强黏附低共熔凝胶的制备及其在柔性传感器中的应用

Preparation of a stretchable/transparent/adhesive deep eutectic gel and its application in flexible sensors

以丙烯酸(AA)、苹果酸(MA)、氯化胆碱(ChCl)为原料,采用原位光催化聚合法制备一种低共熔凝胶P(AADES/MADES-n)。采用傅里叶红外光谱(FTIR)、紫外-可见光谱、断裂应变和电阻变化率对P(AADES/MADES-n)的结构、透明性、力学性能和应变传感性能进行表征。结果表明,P(AADES/MADES-50)具有高透明性能(可见光透过率为91%)、高拉伸性能(断裂伸长率为1300%)、强黏附性(对铝的黏附力为270 kPa)、高离子电导率(3.2×10^(-3)S/m)以及良好的力学回复性等特点。基于P(AADES/MADES-50)的电阻式传感器具有灵敏且稳定的电阻响应,能快速、重复、稳定地检测人体手掌不同部位的弯曲和伸展运动,展现出良好的人体运动实时监测性能,在运动传感器领域具有潜在的应用前景。

A type of deep eutectic gel P(AADES/MADES-n)was prepared by in situ photo-polymerization using acrylic acid(AA),malic acid(MA)and choline chloride(ChCl)as raw materials.The structure,transparency,mechanical properties and strain sensing performance of P(AADES/MADES-n)were characterized by Fourier infrared spectroscopy(FTIR),UV-Vis spectroscopy,elongation at break and resistance change rate,respectively.The results show that P(AADES/MADES-50)exhibits the characteristics of high transparency(visible light transmittance is 91%),high tensile property(elongation at break is 1300%),strong adhesion(adhesion to aluminum is 270 kPa),high ionic conductivity(the highest conductivity is 3.2×10^(-3)S/m)and good mechanical recovery.P(AADES/MADES-50)has a sensitive and stable resistance response as a resistive sensor and shows excellent performance for real-time monitoring of human motion by fast,repeated and stable detection of the bending and straightening of different parts of a hand,which has a wide range of application prospects in the field of motion sensor.