Chapter 3

3D Printing of Functional Composites with Strain Sensing and Self-Heating Capabilities

Xin Wang

Xin Wang

Composite Materials and Structures Laboratory, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, USA

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Jihua Gou

Jihua Gou

Composite Materials and Structures Laboratory, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, USA

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First published: 08 February 2021

Summary

This chapter introduces the inkjet 3D printing and fused deposition modelling technique used to fabricate functional carbon nanotube (CNT) reinforced polymer composites. It gives some examples of functional nanocomposites fabricated by digital printing technique including strain sensors, heating elements, and shape memory composites. Spray deposition modelling (SDM) is a digital fabrication process in which the CNT ink droplets are supplied in the form of a stream to any desired location since the nozzle is connected to a computer controlled x and y axis. The SDM approach is able to control the sensing properties of the printed strain sensor by simply changing layers of printings. The chapter analyses the self-heating performance of printed CNT based films. Particularly, by incorporating different numbers of printed CNT layers into shape memory polymers (SMP) at specified locations, localized actuation of SMP with desired shape recovery ratio could be achieved.

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