TY - JOUR

T1 - Self-Reducing Silver Ink on Polyurethane Elastomers for the Manufacture of Thin and Highly Stretchable Electrical Circuits

AU - Krawczyk, Krzysztof K.

AU - Groten, Jonas

AU - Glushko, Oleksandr

AU - Krivec, Matic

AU - Frühwirth, Matthias

AU - Schulz, Gernot

AU - Wolf, Christian

AU - Hartmann, Delara

AU - Moser, Maximilian

AU - Cordill, Megan J.

AU - Stadlober, Barbara

AU - Griesser, Thomas

N1 - Publisher Copyright: © 2021 American Chemical Society.

PY - 2021/3/22

Y1 - 2021/3/22

N2 - Stretchable conductive films were obtained by screen printing and thermal treatment of a homogenous ink comprising a thermally reducible silver formate complex, an acrylate monomer, and a radical initiator. In the curing process, both the filler nanoparticles and the polymer matrix are generated in situ, at temperatures as low as 100 °C. The obtained conductors, consisting of percolated silver nanoparticles embedded in a polymeric matrix, typically show a resistivity of (2–4) × 10–5 Ω·m. When applied on an elastomeric substrate, the composite is stretchable up to 200% with very low R/R0 values, which is unprecedented for stretchable silver composite inks. Quasi-in situ confocal laser scanning microscopy of the strained samples revealed an initial fracture strain above 40%, which is unusually high for metal–nanoparticle films. The described system was compared to some commercial stretchable screen-printing inks and proved superior with regard to both R/R0 and resistance to cyclic tensile loading.

AB - Stretchable conductive films were obtained by screen printing and thermal treatment of a homogenous ink comprising a thermally reducible silver formate complex, an acrylate monomer, and a radical initiator. In the curing process, both the filler nanoparticles and the polymer matrix are generated in situ, at temperatures as low as 100 °C. The obtained conductors, consisting of percolated silver nanoparticles embedded in a polymeric matrix, typically show a resistivity of (2–4) × 10–5 Ω·m. When applied on an elastomeric substrate, the composite is stretchable up to 200% with very low R/R0 values, which is unprecedented for stretchable silver composite inks. Quasi-in situ confocal laser scanning microscopy of the strained samples revealed an initial fracture strain above 40%, which is unusually high for metal–nanoparticle films. The described system was compared to some commercial stretchable screen-printing inks and proved superior with regard to both R/R0 and resistance to cyclic tensile loading.

UR - http://www.scopus.com/inward/record.url?scp=85104934731&partnerID=8YFLogxK

U2 - 10.1021/acs.chemmater.0c04025

DO - 10.1021/acs.chemmater.0c04025

M3 - Article

AN - SCOPUS:85104934731

VL - 33.2021

SP - 2742

EP - 2755

JO - Chemistry of materials

JF - Chemistry of materials

SN - 0897-4756

IS - 8

ER -