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A Simple and Scalable Fabrication Method for Organic Electronic Devices on Textiles

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Published on: March 13, 2017

Encapsulation of Electrically Conductive Apparel Fabrics: Effects on Performance.

Sophie Wilson¹, Raechel Laing¹, Eng Wui Tan²

¹Materials Science and Technology, University of Otago, Dunedin 9016, New Zealand.

Sensors (Basel, Switzerland)

|August 6, 2020

Summary

Graphene-treated fabrics gain electrical conductivity but lose durability. Encapsulation with silicone products helps protect the conductive graphene layer on wool and cotton fabrics, making them suitable for apparel patches.

Keywords:

cotton electrical conductivity encapsulation grapheme knit fabric wearable technology wool

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Area of Science:

Materials Science
Textile Engineering
Nanotechnology

Background:

Electrically conductive fabrics are desirable for wearable electronics.
Graphene treatments enhance conductivity but often compromise fabric properties and durability.
Encapsulation is explored as a method to protect functional treatments.

Purpose of the Study:

To investigate the effects of graphene functionalization and subsequent encapsulation on next-to-skin fabric properties.
To evaluate the durability and performance of treated fabrics under various environmental and physical stresses.
To determine the suitability of treated fabrics for integration into apparel.

Main Methods:

Wool and cotton knit fabrics were functionalized with graphene ink.
Fabrics were encapsulated using three different poly(dimethylsiloxane)-based products.
Key properties including fabric structure, moisture transfer, and electrical conductivity were assessed.
Durability was tested against wash, abrasion, storage, and transient ambient conditions.

Main Results:

Graphene treatment imparted electrical conductivity, which decreased upon encapsulation.
Electrical conductivity increased with wetting and high humidity/low temperature, but decreased with wash, abrasion, and storage.
All encapsulants offered some protection against environmental and physical stresses, with slight variations.
Moisture transfer properties were altered by both graphene and encapsulant treatments.

Conclusions:

While encapsulation reduces initial electrical conductivity, it enhances the durability of graphene-treated fabrics.
Treated wool and cotton fabrics exhibit altered properties but remain suitable for use as integrated patches in upper body apparel.