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Assessing Wear Characteristics of Sprayable, Diacetylene-Containing Sensor Formulations.

Priyanka Shiveshwarkar¹, Anthony David Nelson¹, My Thi Nguyen¹

¹Department of Bioengineering, The University of Texas at Arlington, 500 UTA Blvd., Arlington, TX 76010, USA.

Sensors (Basel, Switzerland)

|November 9, 2024

Summary

New sprayable diacetylene sensors with polymethyl methacrylate (PMMA) offer improved durability for wearable applications. These power-free, colorimetric sensors can detect radiation, gases, and liquids, enhancing environmental risk monitoring.

Keywords:

diacetylene environmental monitoring sprayable sensors wear resistance

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Area of Science:

Materials Science
Chemical Sensing
Wearable Technology

Background:

Diacetylene-based sprayable sensors offer a power-free, colorimetric method for detecting various targets.
Current limitations include poor wear resistance and susceptibility to false positives from wetting.
Adaptation for wearable sensing requires enhanced coating stability and reliability.

Purpose of the Study:

To develop and assess sprayable diacetylene sensor formulations for improved wearable sensing applications.
To enhance the durability, wear resistance, and color fastness of these sensors on fabric.
To maintain the sensing capabilities for radiation, gases, and liquids.

Main Methods:

Incorporation of polymethyl methacrylate (PMMA) into diacetylene-based sprayable sensor formulations.
Application of sensor coatings onto cotton fabric.
Evaluation of wear resistance and color loss compared to formulations without PMMA.
Assessment of the colorimetric response to target analytes.

Main Results:

PMMA incorporation significantly improved coating stability, reducing color loss due to wear to 8% compared to 18-25% without PMMA.
The enhanced formulations maintained the diacetylene-component's ability to detect radiation, gas, and liquid phase analytes.
Reduced false-positive signals due to wetting were observed.

Conclusions:

The addition of PMMA represents a significant advancement for sprayable diacetylene-based sensors in wearable applications.
These durable, reliable sensors are suitable for detecting environmental risks and cumulative exposure.
Future applications may include UV radiation, hydrogen peroxide vapor, and solvent exposure monitoring.