Design, Simulation and Experimental Characteristics of Hydrogel-based Piezoresistive pH Sensors
Design, Simulation and Experimental Characteristics of Hydrogel-based Piezoresistive pH Sensors
复制标题
基于水凝胶的压阻式pH传感器的设计、仿真和实验特性
DOI：
10.1007/978-3-540-88201-5_33
复制
发表时间：
2009
影响因子：
4.6
通讯作者：
G. Gerlach
中科院分区：
文献类型：
--
作者：
T. Q. Trinh;J. Sorber;G. Gerlach
本文介绍了一种新型的压阻式pH传感器的研究，利用化学机械能转换由于水凝胶溶胀。pH敏感的聚（乙烯醇）-聚（丙烯酸）（PVA-PAA）水凝胶用于此目的。pH传感器的设计包括一个商业压阻压力传感器芯片，水凝胶层，和一个刚性网格。采用有限元法（ANSYS）模拟了聚合物水凝胶溶胀时pH传感器的行为。使用PVA-PAA水凝胶的实验材料参数进行了传感器模拟。测量了传感器的特性，包括硅膜片的挠度和输出电压。模拟结果与实验结果有较好的一致性。
This paper presents the investigations of a novel type of piezoresistive pH sensors exploiting the chemo-mechanical energy conversion due to hydrogel swelling. pH-sensitive poly(vinyl alcohol)-poly(acrylic acid) (PVA-PAA) hydrogel is used for this aim. The pH sensor has been designed including a commercial piezoresistive pressure sensor chip, a hydrogel layer, and a rigid grid. Behaviour of pH sensor under swelling of polymer hydrogel has been simulated using finite element method (ANSYS). The sensor simulations have been performed using the experimental material parameters of PVA-PAA hydrogel. The sensor characteristics including the silicon diaphragm deflection and output voltage have been measured. There were good relative agreements between simulations and experimental results.