Issue 30, 2023

3D printing of solvent-treated PEDOT:PSS inks for electromagnetic interference shielding

Abstract

3D printing of conductive polymers has been achieved very recently by direct ink writing of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS)-based inks. This field is in its infancy, calling for further research to broaden the application horizon of 3D-printed conductive polymers by fine-tuning their inherent properties. Indeed, engineering PEDOT:PSS inks with customizable electrical properties while keeping their rheological fingerprint within the proper range for high-fidelity 3D printing is an arduous challenge, yet to be achieved. Herein, a range of PEDOT:PSS-based inks are formulated by molecular engineering via co-solvent doping and solvent post-treatment with various solvents for high-resolution (line width and thickness variations less than 20% from average values), high-aspect-ratio (≥25 layers) 3D printing. Via a simple dry-annealing technique, rationally patterned flexible, self-standing, and geometry-friendly samples featuring a wide range of conductivity, i.e., from 0.6 to 858.1 ± 60.8 S cm−1, are fabricated. The results showed that the 3D-printed samples are wet-transferable onto uneven substrates and complex objects with sharp edges. By exploiting their tunable molecular-scale chemistry and macro-scale geometrical features, the 3D-printed devices were used to create advanced electromagnetic shields with controlled mechanisms.

Graphical abstract: 3D printing of solvent-treated PEDOT:PSS inks for electromagnetic interference shielding

Supplementary files

Article information

Article type
Paper
Submitted
18 feb 2023
Accepted
07 jun 2023
First published
08 jun 2023

J. Mater. Chem. A, 2023,11, 16027-16038

3D printing of solvent-treated PEDOT:PSS inks for electromagnetic interference shielding

S. Ghaderi, H. Hosseini, S. A. Haddadi, M. Kamkar and M. Arjmand, J. Mater. Chem. A, 2023, 11, 16027 DOI: 10.1039/D3TA01021J

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