用于快速响应压阻式微传感器的聚n -异丙基丙烯酰胺水凝胶孔隙率研究

IF 0.8 Q4 INSTRUMENTS & INSTRUMENTATION

Journal of Sensors and Sensor Systems Pub Date : 2021-03-31 DOI:10.5194/JSSS-10-93-2021

D. Franke, G. Gerlach

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引用次数: 3

摘要

采用两种基于表面活性剂的模板法合成了孔径在纳米和微米范围内的多孔聚N -异丙基丙烯酰胺(PNIPAAm)水凝胶。我们发现，较小的孔径导致更快的肿胀和肿胀。一个描述膨胀动力学模型的图形表示解释了这样一个假设，即在较大的比表面积(即较小的孔径)下，水的释放和吸收更快。此外，与无孔PNIPAAm水凝胶相比，开孔通道结构有利于水的输送。传感器测量结果的响应时间在36秒到4分钟之间，也显示了多孔水凝胶的机械稳定性的重要性。

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Studies on porosity in poly(N-isopropylacrylamide) hydrogels for fast-responsive piezoresistive microsensors

Porous poly(N -isopropylacrylamide) (PNIPAAm) hydrogels with pore diameters in the nanometer and the micrometer range were synthesized using two variations of the surfactant-based template method. We showed that smaller pore diameters lead to faster swelling and deswelling. A graphic representation of a model describing the swelling kinetics explains the assumption that the release and the uptake of water is faster for a larger specific surface area, that is smaller pore diameters. Additionally, the open-porous channel structure benefits the water transport compared to a nonporous PNIPAAm hydrogel. Sensor measurements result in response times between 36 s and 4 min also showing the importance of mechanical stability of porous hydrogels.

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来源期刊

Journal of Sensors and Sensor Systems INSTRUMENTS & INSTRUMENTATION-

CiteScore

2.30

自引率

10.00%

发文量

审稿时长

23 weeks

期刊介绍： Journal of Sensors and Sensor Systems (JSSS) is an international open-access journal dedicated to science, application, and advancement of sensors and sensors as part of measurement systems. The emphasis is on sensor principles and phenomena, measuring systems, sensor technologies, and applications. The goal of JSSS is to provide a platform for scientists and professionals in academia – as well as for developers, engineers, and users – to discuss new developments and advancements in sensors and sensor systems.