Electroactive shape-memory polyurethane composites incorporating carbon nanotubes
Abstract
Abstract Summary: Electro‐active shape‐memory composites were synthesized using conducting polyurethane (PU) composites and multi‐walled carbon nanotubes (MWNTs). Surface modification of the MWNTs (by acid treatment) improved the mechanical properties of the composites. The modulus and stress at 100% elongation increased with increasing surface‐modified MWNT content, while elongation at break decreased. MWNT surface modification also resulted in a decrease in the electrical conductivity of the composites, however, as the surface modified MWNT content increased the conductivity increased (an order of 10−3 S · cm−1 was obtained in samples with 5 wt.‐% modified‐MWNT content). Electro‐active shape recovery was observed for the surface‐modified MWNT composites with an energy conversion efficiency of 10.4%. Hence, PU‐MWNT composites may prove promising candidates for use as smart actuators. The electro‐active shape‐recovery behavior of PU‐MWNT composites. The pictured transition occurs within 10 s when a constant voltage of 40 V is applied. magnified image The electro‐active shape‐recovery behavior of PU‐MWNT composites. The pictured transition occurs within 10 s when a constant voltage of 40 V is applied.
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SMPs can be thermally triggered by indirect heating via Joule effect, infra-red irradiation, or magnetically actuated nanocomposites.
“In addition, SMPs can be thermally-triggered by indirect heating via Joule effect (e.g., PURs enriched with carbon nanotubes) [41,42], infra-red (IR) irradiation (e.g., cellulose nanocrystals filled thermoplastics elastomers) [43] or magnetically actuated nanocomposites [44-46].”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [42]
Surface modification of carbon nanotubes decreases the electrical conductivity of the composites because the acid treatment increases defects of the lattice structure of carbon-carbon bonds.
“Surface modification of the CNTs decreases the electrical conductivity of the composites because the acid treatment increases defects of the lattice structure of carbonecarbon bonds.”
From A review of stimuli-responsive shape memory polymer composites (2013) · cites this paper as [342]
Cho et al. first reported the electroactive SME of SMPs filled with CNTs through joule heating.
“Cho et al. [342] first reported the electroactive SME of SMPs filled with CNTs through joule heating.”
From A review of stimuli-responsive shape memory polymer composites (2013) · cites this paper as [342]
Loading PCL-based SMPU with 5 wt% functionalized MWCNTs enabled complete shape recovery within 10 s at 40 V.
“loading PCL-based SMPU with 5 wt% of functionalized MWCNTs for interfacial bonding between polymer chains and nanotubes enabled Cho et al. [35] to completely recover the shape of their composite within 10 s through the application of a 40 V electrical potential.”
From Review on the Functional Determinants and Durability of Shape Memory Polymers (2010) · cites this paper as [35]
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- Authors
- Cho, J. W., Kim, J. W., Jung, Y. C., & Goo, N. S.
- Affiliations
- Konkuk University (KR)
- Corresponding author
- Cho, Jae Whan
- Venue
- Macromolecular Rapid Communications
- Publisher
- Wiley
- Published
- 2005-02-23
- Volume
- 26
- Issue
- 5
- Pages
- 412-416
- ISSN
- 1022-1336 (ISSN-L)
- 1521-3927
- OpenAlex
- W1986167149
- Cited by
- 603
- References
- 22
- Citations by year
- 2026: 7 · 2025: 9 · 2024: 23 · 2023: 14 · 2022: 26 · 2021: 38 · 2020: 30 · 2019: 43 · 2018: 30 · 2017: 33 · 2016: 49 · 2015: 38 · 2014: 41 · 2013: 51 · 2012: 41
- FWCI
- 12.58
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Macromolecular Rapid Communications (publishedVersion)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Dielectric materials and actuators
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Materials Science › Materials Chemistry › Carbon Nanotubes in Composites
- Keywords
- shape memory polyurethane, multi-walled carbon nanotubes, electroactive composites, conductive polymer composites, acid treatment of carbon nanotubes, surface modification, electrical conductivity, mechanical properties, shape recovery, energy conversion efficiency, smart actuators
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