Journal
POLYMERS
Volume 14, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/polym14030542
Keywords
carbon nanotubes (CNTs); carbonyl iron powder (CIP); magneto-resistive; sensors
Categories
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2020R1I1A3074036]
- National Research Foundation of Korea [2020R1I1A3074036] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This paper presents a comprehensive study on the magneto-sensing properties of a conductive polymeric composite incorporating carbon nanotube (CNT) and carbonyl iron powder (CIP), aiming to evaluate its potential as a magneto-sensor. Experimental results show that the CNT contents within the percolation threshold range exhibit optimal values for sensor applications, achieving high sensitivity and fast response time. Thus, the CNT-CIP composite is confirmed to have a high potential for implementing as magneto-sensors.
The conductive polymeric composites incorporating carbon nanotube (CNT) and carbonyl iron powder (CIP) have attracted much attention for various sensor applications. In this paper, a comprehensive study of the magneto-sensing property of a CNT-CIP embedded polymer composite is conducted to implement the composite as magneto-sensors. Thus, this study experimentally investigated the magneto-sensing performances of CNT-doped polymeric composites with the addition of CIP in terms of electrical conductivity, sensitivity, repeatability, and response time. First, the CNT-CIP clusters were manufactured and their interactions were analyzed with the zeta potential measurement and SEM observation. Then, the CNT-CIP clusters were embedded into the polymeric composites for the magneto-sensing evaluations. Experiments showed that the CNT contents in the range of percolation threshold (i.e., 0.5% and 0.75%) are optimal values for sensor applications. The addition of CNT 0.5% and 0.75% resulted in a high sensitivity of 7% and a faster response time within 400 ms. Experiment evaluation confirmed a high potential of implementing CNT-CIP composite as magneto-sensors.
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