The Humidity Sensitive Behavior of Poly(Ethyleneimine)/Multiwall Carbon Nanotube Composite Films

Tao Zhu; Guang Zhong Xie; Ya Dong Jiang; Jian Liao; Hui Ling Tai

doi:10.4028/www.scientific.net/KEM.531-532.588

Paper Titles

Preparation and Investigation of Toluene-Sensing Properties of Polymer/Inorganic Composite and Multi-Layer Films
p.570

Study on the Reliability Problem of UV-LIGA Technics
p.574

Accelerated Degradation Modeling and Statistical Analysis of MEMS Device Based on Competing Failure
p.580

Experimental Study on Miniature-Refrigeration System
p.584

The Humidity Sensitive Behavior of Poly(Ethyleneimine)/Multiwall Carbon Nanotube Composite Films
p.588

A Preparation Method of Diamond Specimens Using an Advanced FIB Microscopy for Micro and Nanoanalysis
p.592

Microstructure and Mechanical Properties of a Nb-Microalloyed Medium Carbon Steel Treated by Quenching-Partitioning Process
p.596

The Specific Binding between Galactose Group and Ricinus Communis Agglutinin (RCA) Investigated with Microcantilever
p.600

In Situ Polymerization and Photophysical Properties of Poly(p-phenylene Benzobisoxazole)/Nano-Sized TiO₂ Fibers
p.605

HomeKey Engineering MaterialsKey Engineering Materials Vols. 531-532The Humidity Sensitive Behavior of...

The Humidity Sensitive Behavior of Poly(Ethyleneimine)/Multiwall Carbon Nanotube Composite Films

Abstract:

In this paper, a novel humidity sensor based on polymer-carbon nanotube composites was prepared and characterized. Two different methods were adopted to fabricate the humidity-sensing film for these sensors. The surface of the films was observed by a scanning electron microscope (SEM). The sensing material made up of poly(ethyleneimine) and multiwall carbon nanotube was sprayed on the interdigitated microelectrode pairs(IDTs). The resistance between the two electrodes was measured at different relative humidity levels at 19°C. The data shows that the resistance increases with the rise of the relative humidity over the range of 5-90% RH and that, the resistance increases almost linearly in the range of 5-71% RH. The response of the sensors to NO₂ and NH₃ were also examined, and the results reveal that the sensor is not sensitive to both of them.