Publisher DOI: 10.1021/acsapm.1c00999
Title: Electroactive self-healing shape memory polymer composites based on Diels-Alder chemistry
Language: English
Authors: Orozco, Felipe 
Kaveh, Mahsa 
Santosa, Dian S. 
Lima, Guilherme Macedo R. 
Ribas Gomes, Diego 
Pei, Yutao 
Araya-Hermosilla, Rodrigo 
Moreno-Villoslada, Ignacio 
Picchioni, Francesco 
Bose, Ranjita K. 
Keywords: Diels-Alder; electroactive polymer; polymer composites; self-healing polymers; shape memory
Issue Date: 16-Nov-2021
Publisher: ACS Publications
Source: ACS Applied Polymer Materials 3 (12): 6147-6156 (2021)
Abstract (english): 
Both shape memory and self-healing polymers have received significant attention from the materials science community. The former, for their application as actuators, self-deployable structures, and medical devices; and the latter, for extending the lifetime of polymeric products. Both effects can be stimulated by heat, which makes resistive heating a practical approach to trigger these effects. Here we show a conductive polyketone polymer and carbon nanotube composite with cross-links based on the thermo-reversible furan/maleimide Diels-Alder chemistry. This approach resulted in products with efficient electroactive shape memory effect, shape reprogrammability, and self-healing. They exhibit electroactive shape memory behavior with recovery ratios of about 0.9; requiring less than a minute for shape recovery; electroactive self-healing behavior able to repair microcracks and almost fully recover their mechanical properties; requiring a voltage in the order of tens of volts for both shape memory and self-healing effects. To the best of our knowledge, this is the first report of electroactive self-healing shape memory polymer composites that use covalent reversible Diels-Alder linkages, which yield robust solvent-resistant polymer networks without jeopardizing their reprocessability. These responsive polymers may be ideal for soft robotics and actuators. They are also a step toward sustainable materials by allowing an increased lifetime of use and reprocessability.
ISSN: 2637-6105
Journal: ACS applied polymer materials 
Document Type: Article
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