Work

Intrinsically temperature-insensitive flexible pressure sensor based on polyvinyl chloride/carbon black composites

Year: 2025

Type: article

Abstract: Due to the temperature sensitivity typically exhibited by conductive polymer composites (CPCs), changes in the ambient temperature can seriously affect the measurement accuracy of flexible pressure sensors. Therefore, realizing CPC-based flexible pressure sensors with good resistance to temperature changes is an urgent problem. Herein, a polyvinyl chloride/carbon black (PVC/CB) conductive composite with a resistance temperature coefficient approaching zero (-0.0077%°C -1 in the temperature range of 25–55°C) is developed to successfully prevent the changes in resistance that conductive composite materials typically undergo with temperature fluctuation. PVC/CB functional paste is used to prepare the pressure-sensitive layer of the micro-flexible pressure sensor by screen printing method. The performance of this sensor is not affected by temperature, and it exhibits a high sensitivity of 0.514 kPa -1 , a rapid response time (15 ms), and good stability. These research results provide new ideas for the design and preparation of CPC-based flexible sensors, promoting their application in wearable devices, medical monitoring, aerospace, and other fields.

Source: Journal of Science Advanced Materials and Devices

DOI: 10.1016/j.jsamd.2025.101033

Authors: Xirui Guo, Ping Sun, Yao Xiao

Institutions: Chengdu Second People's Hospital, Chengdu University of Information Technology

Language: English

Topic: Advanced Sensor and Energy Harvesting Materials

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,300

Funders: Chengdu University of Information Technology, Chengdu University