Significantly reducing electrical resistivity by forming conductive Ni chains in a polyurethane shape-memory polymer/carbon-black composite
Abstract
We demonstrate an approach to significantly reduce the electrical resistivity in a polyurethane shape-memory polymer (SMP) filled with randomly distributed carbon black (CB). With an additional small amount of randomly distributed Ni microparticles (0.5vol%) in the SMP/CB composite, its electrical resistivity is only reduced slightly. However, if these Ni particles are aligned into chains (by applying a low magnetic field on the SMP/CB/Ni solution before curing), the drop of the electrical resistivity is significant. This approach, although demonstrated in a SMP, is applicable to other conductive polymers.
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Compared with samples with randomly distributed conductive fillers, the electrical resistivity was reduced by over 100 times when Ni powders and carbon nanotubes were aligned in carbon black/shape memory polymer composites.
“It was reported that compared with the samples with randomly distributed conductive fillers, the electrical resistivity was reduced by over 100 times.”
From A review of stimuli-responsive shape memory polymer composites (2013) · cites this paper as [347]
Compared with the samples with randomly distributed conductive fillers, the electrical resistivity was reduced by over 100 times when Ni powders and CNTs were aligned in CB/SMP composites using magnetic field or electrical field.
“It was reported that compared with the samples with randomly distributed conductive fillers, the electrical resistivity was reduced by over 100 times.”
From A review of stimuli-responsive shape memory polymer composites (2013) · cites this paper as [347]
Aligned Ni chains served as conductive channels to bridge small isolated carbon black aggregates.
“This positive effect was based on the fact that the aligned Ni chains served as conductive channels to bridge small isolated carbon black aggregates.”
From Review on the Functional Determinants and Durability of Shape Memory Polymers (2010) · cites this paper as [48]
Mixing 0.5 vol% Ni particles and 4-10 vol% carbon black with SMPU and applying low magnetic field during DMF volatilization formed conductive Ni powder chains and improved electrical conductivity.
“The authors obtained electrically conductive composites by mixing 0.5 vol% Ni particles and 4-10 vol% carbon black with an SMPU (T trans = T g ), which was dissolved in DMF.During volatilization of DMF, a low magnetic field was applied to the polymer/filler solution.As a result, conductive Ni powder chains formed and the electrical conductivity improved (Figure 2).”
From Review on the Functional Determinants and Durability of Shape Memory Polymers (2010) · cites this paper as [48]
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- Authors
- Leng, J. S., Huang, W. M., Lan, X., Liu, Y. J., & Du, S. Y.
- Affiliations
- Harbin Institute of Technology (CN)
- Nanyang Technological University (SG)
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2008-05-19
- Volume
- 92
- Issue
- 20
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2044352582
- Cited by
- 196
- References
- 18
- Citations by year
- 2026: 1 · 2025: 5 · 2024: 5 · 2023: 5 · 2022: 9 · 2021: 7 · 2020: 13 · 2019: 9 · 2018: 5 · 2017: 16 · 2016: 8 · 2015: 10 · 2014: 9 · 2013: 19 · 2012: 12
- FWCI
- 17.89
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Applied Physics Letters (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Conducting polymers and applications
- Physical Sciences › Engineering › Biomedical Engineering › Dielectric materials and actuators
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Electromagnetic wave absorption materials
- Keywords
- electrical resistivity reduction, shape memory polymers, polyurethane, carbon black, nickel microparticles, magnetic field alignment, polymer composites, conducting polymers
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