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Interface Design Strategy for the Fabrication of Highly Stretchable Strain Sensors.
ACS Appl Mater Interfaces. 2018 Oct 24; 10(42):36483-36492.AA

Abstract

Simultaneously achieving high piezoresistive sensitivity, stretchability, and good electrical conductivity in conductive elastomer composites (CECs) with carbon nanofillers is crucial for stretchable strain sensor and electrode applications. Here, we report a facile and environmentally friendly strategy to realize these three goals at once by using branched carbon nanotubes, also known as the carbon nanostructure (CNS). Inspired by the brick-wall structure, a robust segregated conductive network of a CNS is formed in the thermoplastic polyurethane (TPU) matrix at a very low filler fraction, which renders the composite very good electrical, mechanical, and piezoresistive properties. An extremely low percolation threshold of 0.06 wt %, currently the lowest for TPU-based CECs, is achieved via this strategy. Meanwhile, the electrical conductivity is up to 1 and 40 S/m for the composites with 0.7 and 4 wt % CNS, respectively. Tunable piezoresistive sensitivity dependent on CNS content is obtained, and the composite with 0.7 wt % filler has a gauge factor up to 6861 at strain ε = 660% (elongation at break is 950%). In addition, this strategy also renders the composites' attractive tensile modulus. The composite with 3 wt % CNS shows 450% improvement in Young's modulus versus neat TPU. This work introduces a facile strategy to fabricate highly stretchable strain sensors by designing CNS network structures, advancing understanding of the effects of polymer-filler interfaces on the mechanical and electrical property enhancements for polymer nanocomposites.

Authors+Show Affiliations

Department of Macromolecular Science and Engineering , Case Western Reserve University , 2100 Adelbert Road , Cleveland , Ohio 44106-7202 , United States.Department of Macromolecular Science and Engineering , Case Western Reserve University , 2100 Adelbert Road , Cleveland , Ohio 44106-7202 , United States.Department of Macromolecular Science and Engineering , Case Western Reserve University , 2100 Adelbert Road , Cleveland , Ohio 44106-7202 , United States.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30280558

Citation

Sang, Zhen, et al. "Interface Design Strategy for the Fabrication of Highly Stretchable Strain Sensors." ACS Applied Materials & Interfaces, vol. 10, no. 42, 2018, pp. 36483-36492.
Sang Z, Ke K, Manas-Zloczower I. Interface Design Strategy for the Fabrication of Highly Stretchable Strain Sensors. ACS Appl Mater Interfaces. 2018;10(42):36483-36492.
Sang, Z., Ke, K., & Manas-Zloczower, I. (2018). Interface Design Strategy for the Fabrication of Highly Stretchable Strain Sensors. ACS Applied Materials & Interfaces, 10(42), 36483-36492. https://doi.org/10.1021/acsami.8b14573
Sang Z, Ke K, Manas-Zloczower I. Interface Design Strategy for the Fabrication of Highly Stretchable Strain Sensors. ACS Appl Mater Interfaces. 2018 Oct 24;10(42):36483-36492. PubMed PMID: 30280558.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Interface Design Strategy for the Fabrication of Highly Stretchable Strain Sensors. AU - Sang,Zhen, AU - Ke,Kai, AU - Manas-Zloczower,Ica, Y1 - 2018/10/15/ PY - 2018/10/4/pubmed PY - 2018/10/4/medline PY - 2018/10/4/entrez KW - carbon nanostructures (CNS) KW - electrical conductivity KW - segregated structure KW - strain sensor KW - thermoplastic polyurethane (TPU) SP - 36483 EP - 36492 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 10 IS - 42 N2 - Simultaneously achieving high piezoresistive sensitivity, stretchability, and good electrical conductivity in conductive elastomer composites (CECs) with carbon nanofillers is crucial for stretchable strain sensor and electrode applications. Here, we report a facile and environmentally friendly strategy to realize these three goals at once by using branched carbon nanotubes, also known as the carbon nanostructure (CNS). Inspired by the brick-wall structure, a robust segregated conductive network of a CNS is formed in the thermoplastic polyurethane (TPU) matrix at a very low filler fraction, which renders the composite very good electrical, mechanical, and piezoresistive properties. An extremely low percolation threshold of 0.06 wt %, currently the lowest for TPU-based CECs, is achieved via this strategy. Meanwhile, the electrical conductivity is up to 1 and 40 S/m for the composites with 0.7 and 4 wt % CNS, respectively. Tunable piezoresistive sensitivity dependent on CNS content is obtained, and the composite with 0.7 wt % filler has a gauge factor up to 6861 at strain ε = 660% (elongation at break is 950%). In addition, this strategy also renders the composites' attractive tensile modulus. The composite with 3 wt % CNS shows 450% improvement in Young's modulus versus neat TPU. This work introduces a facile strategy to fabricate highly stretchable strain sensors by designing CNS network structures, advancing understanding of the effects of polymer-filler interfaces on the mechanical and electrical property enhancements for polymer nanocomposites. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/30280558/Interface_Design_Strategy_for_the_Fabrication_of_Highly_Stretchable_Strain_Sensors_ L2 - https://dx.doi.org/10.1021/acsami.8b14573 DB - PRIME DP - Unbound Medicine ER -
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