Journal
SMART MATERIALS AND STRUCTURES
Volume 30, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-665X/abcf1d
Keywords
electrohydrodynamic 3D printing; dielectric elastomer; silicone rubber; copper phthalocyanine
Funding
- National Natural Science Foundation of China [51703108]
- Shandong Provincial Natural Science Foundation, China [ZR2017BEM042]
- Shandong Provincial Key Research and Development Program, China [2019GGX102071, 2018GGX108003]
- Shandong 'Taishan Youth Scholar Program'
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EHD 3D printing was utilized to fabricate SR/CuPc composite films, resulting in high dielectric constant and electromechanical stability, demonstrating considerable potential for fabricating high-performance DE films.
Compared with traditional methods for preparing dielectric elastomer (DE) films, electrohydrodynamic (EHD) 3D printing displays many advantages, notably full automation, computer control and flexible design. It also confers high printing resolution, high preparation efficiency with minimal probability of nozzle clogging. In this article, EHD 3D printing was employed to fabricate silicone rubber (SR) based DE films. In order to increase their dielectric constant, high dielectric copper phthalocyanine (CuPc) particles were added into the SR ink. Optimal printing conditions were determined by analyzing the effects of printing voltage and ink properties on the formation of liquid cone and the printed line width. The SR/CuPc composite film with 3 wt% CuPc particles (SR/CuPc-3) exhibits a high dielectric constant of 5.52, with a large actuated area strain of 23.7% under an electric field of 39.4 V mu m(-1). Furthermore, under 100 cycles of electric field loading, SR/CuPc-3 demonstrate excellent electromechanical stability, indicating that EHD 3D printing holds a considerable potential for fabricating high-performance DE films in an efficacious manner.
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