Online Cure Monitoring of Carbon Nanotube/Polyimide Films

被引：0
|
作者：
Cen-Puc, Marco [1 ]
Gleason, Minerva G. Vargas [1 ]
Schander, Andreas [1 ]
Lang, Walter [1 ]
机构：
[1] Univ Bremen, Inst Microsensors Actuators & Syst IMSAS, D-28359 Bremen, Germany
来源：
2022 IEEE SENSORS | 2022年
关键词：
Polyimide thin films; carbon nanotubes; thermoresistive polymers; cure monitoring; polymer nanocomposites; nanocomposite modeling;
D O I：
10.1109/SENSORS52175.2022.9967184
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The work presents a method for online cure monitoring of polyimide nanocomposite films by measuring their electrical resistance. The polymer is mixed with 3% weight carbon nanotubes, and interdigital gold electrodes are structured on a silicon wafer to measure the electrical resistance. A series of drops in the electrical resistance was observed for each temperature step during the curing process. The first and most significant resistance drop occurred at 120 degrees C. This sudden change was attributed to the evaporation of the solvent since a weight change in the film was observed. A numerical model which computes the number of connected carbon nanotubes with respect to different solvent content also supports the theory of solvent evaporation. The presented method provides a tool to control the curing process of polymers. Moreover, the material could be also used for the fabrication of film polymer-based thermistors.
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页数：4
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