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Ultrastretchable Conductive Elastomers with a Low Percolation Threshold for Printed Soft Electronics.
ACS Appl Mater Interfaces 2019; 11(41):38092-38102AA

Abstract

Stretchable conductors are required for next-generation soft electronics. Achieving both high electrical conductivity and high stretchability in conductors composed of elastomers and conductive fillers, however, is challenging. Here, a generic, versatile strategy is reported for producing ultrastretchable conductors exhibiting both superior electrical conductivity (>103 S/cm) and stretchability (>1600%). This is achieved by adding small amounts of immiscible secondary fluid into silver (Ag)-filled inks. Capillary forces in these ternary systems induce the self-assembly of conductive particle networks at a low percolation threshold (6-7 vol %), cutting silver consumption by more than 2/3 compared to conventional conductive elastomers. Ag-filled polydimethylsiloxane exhibits superior cyclic durability sustaining 100% tensile strain for 1000 cycles with only a minor loss of conductivity. Ag-filled thermoplastic polyurethane displays unprecedented reversibility with nonretarded switching from conductive to nonconductive states during repeated stretching up to 200% strain. Patterned strain sensors and conductive wirings were 3D-printed to demonstrate the technical feasibility.

Authors+Show Affiliations

Institute for Mechanical Process Engineering and Mechanics , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany.Institute for Mechanical Process Engineering and Mechanics , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany.Institute for Mechanical Process Engineering and Mechanics , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31566949

Citation

Sun, Hongye, et al. "Ultrastretchable Conductive Elastomers With a Low Percolation Threshold for Printed Soft Electronics." ACS Applied Materials & Interfaces, vol. 11, no. 41, 2019, pp. 38092-38102.
Sun H, Han Z, Willenbacher N. Ultrastretchable Conductive Elastomers with a Low Percolation Threshold for Printed Soft Electronics. ACS Appl Mater Interfaces. 2019;11(41):38092-38102.
Sun, H., Han, Z., & Willenbacher, N. (2019). Ultrastretchable Conductive Elastomers with a Low Percolation Threshold for Printed Soft Electronics. ACS Applied Materials & Interfaces, 11(41), pp. 38092-38102. doi:10.1021/acsami.9b11071.
Sun H, Han Z, Willenbacher N. Ultrastretchable Conductive Elastomers With a Low Percolation Threshold for Printed Soft Electronics. ACS Appl Mater Interfaces. 2019 Oct 16;11(41):38092-38102. PubMed PMID: 31566949.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ultrastretchable Conductive Elastomers with a Low Percolation Threshold for Printed Soft Electronics. AU - Sun,Hongye, AU - Han,Zongyou, AU - Willenbacher,Norbert, Y1 - 2019/10/07/ PY - 2019/10/1/pubmed PY - 2019/10/1/medline PY - 2019/10/1/entrez KW - capillary suspension KW - conductive elastomers KW - deformable wirings KW - soft electronics KW - stretchable sensor SP - 38092 EP - 38102 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 11 IS - 41 N2 - Stretchable conductors are required for next-generation soft electronics. Achieving both high electrical conductivity and high stretchability in conductors composed of elastomers and conductive fillers, however, is challenging. Here, a generic, versatile strategy is reported for producing ultrastretchable conductors exhibiting both superior electrical conductivity (>103 S/cm) and stretchability (>1600%). This is achieved by adding small amounts of immiscible secondary fluid into silver (Ag)-filled inks. Capillary forces in these ternary systems induce the self-assembly of conductive particle networks at a low percolation threshold (6-7 vol %), cutting silver consumption by more than 2/3 compared to conventional conductive elastomers. Ag-filled polydimethylsiloxane exhibits superior cyclic durability sustaining 100% tensile strain for 1000 cycles with only a minor loss of conductivity. Ag-filled thermoplastic polyurethane displays unprecedented reversibility with nonretarded switching from conductive to nonconductive states during repeated stretching up to 200% strain. Patterned strain sensors and conductive wirings were 3D-printed to demonstrate the technical feasibility. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/31566949/Ultrastretchable_Conductive_Elastomers_with_a_Low_Percolation_Threshold_for_Printed_Soft_Electronics_ L2 - https://dx.doi.org/10.1021/acsami.9b11071 DB - PRIME DP - Unbound Medicine ER -