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Pressure Gauges

Pressure Gauges

Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...

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3D MXene-Based Flexible Network for High-Performance Pressure Sensor with a Wide Temperature Range.

Yimei Xie¹, Yongfa Cheng², Yanan Ma^1,3

¹State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices & International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|December 25, 2022

Summary

This study presents a flexible pressure sensor using a polyetherimide (PEI) fibrous network and MXene nanosheets. It demonstrates ultrahigh sensitivity across a wide temperature range, ideal for harsh environments and wearable applications.

Keywords:

MXene high sensitivity piezoresistive sensor polyetherimide wide temperature

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Area of Science:

Materials Science
Nanotechnology
Sensor Technology

Background:

Flexible pressure sensors are crucial for smart wearable devices.
Existing sensors struggle with sensitivity in wide temperature ranges, limiting harsh environment applications.

Purpose of the Study:

To develop a flexible piezoresistive sensor with high sensitivity across a broad temperature spectrum.
To explore its potential in wearable technology and harsh condition monitoring.

Main Methods:

Fabrication of a flexible sensor using a polyetherimide (PEI) fibrous network coated with MXene nanosheets.
Characterization of the sensor's piezoresistive properties, sensitivity, response time, and durability under varying temperatures (-5°C to 150°C).

Main Results:

Achieved ultrahigh sensitivity (80 kPa⁻¹ at -5°C, 20 kPa⁻¹ at 150°C) over a wide temperature range.
Demonstrated a low detection limit (9 Pa), fast response (163 ms), and excellent durability (10,000+ cycles).
The sensor maintained functionality at 150°C and in liquid nitrogen, and exhibited Joule heating capabilities.

Conclusions:

The developed MXene/PEI sensor offers superior performance for wearable applications in extreme temperatures.
Its dual functionality (sensing and heating) expands its potential for advanced garments and personal heating systems.