NDLI: Strain sensing characteristics of 3D-printed conductive plastics

Content Provider	IET Digital Library
Author	Ghee, J. R. Mc Sinclair, M. Southee, D. J. Wijayantha, K. G. U.
Abstract	Three types of commercially available conductive three-dimensional (3D) printing filament are electrically characterised for use in 3D-printed functional devices. The three plastics were carbon dispersed acrylonitrile butadiene styrene, carbon dispersed polylactic acid (PLA) and graphene dispersed PLA. The method of 3D printing used was material extrusion and prints were made in both single and dual extrusion modes. The plastics were found to be piezoresistive, enabling them to be characterised as strain sensors. The electrical characteristics of these materials enabled the measurement of strain using low cost, readily available prototyping equipment and minimising the requirement for dedicated instrumentation components (e.g. Wheatstone bridges). Increasing the thickness of the plastics improved conductivity. However, this also decreased the reliability and reproducibility of strain sensor data due to a complex internal 3D structure. The recommendation for reliable use in prototyping and manufacturing is to print tracking under 0.8 mm thickness, thus producing resistance measurements that are predictable and follow a linear regression up to R 2 = 0.9991. A dual extruded 3D print was fabricated as a final demonstration. A force sensing resistor interface was created. The final demonstration uses a PIC18F45K20 microcontroller to process sensor inputs, outputting to an alphanumeric LCD.
Starting Page	570
Ending Page	572
Page Count	3
ISSN	00135194
Volume Number	54
e-ISSN	1350911X
Issue Number	Issue 9, May (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/54/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2018.0363
Journal	Electronics Letters
Publisher Date	2018-03-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	3D-printed Conductive Plastics 3D-printed Functional Devices Alphanumeric LCD Carbon Carbon Dispersed Acrylonitrile Butadiene Styrene Conducting Materials Conductive Three-dimensional Printing Filament Dispersed Polylactic Acid Dual Extruded 3D Print Dual Extrusion Modes Eengineering Materials Science Electrical Characteristic Extrusion Force Sensing Resistor Interface Graphene Dispersed PLA Instrumentation Component Linear Regression Material Extrusion Measurement of Mechanical Variables Mechanical Variables Measurement PIC18F45K20 Microcontroller Piezoresistive Plastics PLA Plastics Polymers And Plastics Prototyping Equipment Reliability Resistance Measurement Sensing And Detecting Device Sensing Device And Transducers Size 0.8 Mm Strain Measurement Strain Sensing Characteristic Strain Sensor Data Reliability Strain Sensor Data Reproducibility Strain Sonsor Three-dimensional Printing
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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