Two-way actuation behavior of shape memory polymer/elastomer core/shell composites
Open accessAbstract
Semi-crystalline shape memory polymers (SMPs) show net two-way shape memory (2W-SM) behavior under constant stresses by the recoverable creep strain upon heating and stress-induced crystallization under the application of creep stress upon cooling. The applied constant stress is the key factor in this 2W-SM behavior. A core/shell structure is manufactured for the purpose of imparting a constant stress upon SMPs. An SMP in film or fiber form is dipped into a solution of an elastomer, photoinitiator, and curing agent and then dried out. After this dip coating process is repeatedly carried out, the SMP/elastomer core/shell composite is deformed into a temporary shape after being heated up above the transition temperature of the SMP. Under constant strain conditions, the composite is cooled down, after which the shell elastomer is cured using ultraviolet light. Then, the SMP/elastomer core/shell composite extends and contracts upon cooling and heating, respectively, without any external load. This cyclic deformation behavior is characterized, demonstrating that the current method offers a simple macroscopic processing technique to manufacture 2W-SM polymer composites.
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Laminated polymers with double SMP layers exhibit two-way SME also under stress-free condition.
“This strategy has also allowed for the development of laminated polymers with double SMP layers exhibiting two-way SME also under stress-free condition [154-156].”
From Two-Way and Multiple-Way Shape Memory Polymers for Soft Robotics: An Overview (2020) · cites this paper as [154]
The Conclusions report reversible two-way actuation in SMPU/SBS core/shell composites, and the schematic in §2.1 labels heating and cooling as occurring at zero external stress. But §2.2 describes one SMPU film coated with an SBS elastomer, not a laminate with double SMP layers. The Introduction’s laminate example likewise pairs an SMP film with an elastomeric film. (LLM, conf=0.88)
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References 19 · Cited by 56
- Authors
- Kang, T.-H., Lee, J.-M., Yu, W.-R., Youk, J. H., & Ryu, H. W.
- Affiliations
- Seoul National University (KR)
- Inha University (KR)
- Soongsil University (KR)
- Corresponding author
- Yu, Woong-Ryeol
- Ryu, Hee Wook
- Venue
- Smart Materials and Structures
- Publisher
- IOP Publishing
- Published
- 2012-02-28
- Volume
- 21
- Issue
- 3
- Pages
- 035028
- ISSN
- 0964-1726 (ISSN-L)
- 1361-665X
- OpenAlex
- W2012586451
- Cited by
- 56
- References
- 19
- Citations by year
- 2025: 4 · 2024: 4 · 2023: 2 · 2022: 6 · 2021: 5 · 2020: 2 · 2019: 7 · 2018: 4 · 2017: 5 · 2016: 2 · 2015: 3 · 2014: 4 · 2013: 7 · 2012: 1
- FWCI
- 7.34
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Smart Materials and Structures (publishedVersion)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
- Physical Sciences › Engineering › Biomedical Engineering › Dielectric materials and actuators
- Keywords
- two-way shape memory effect, shape memory polymers, core-shell composites, semicrystalline polymers, stress-induced crystallization, dip coating, UV curing, constant stress, cyclic deformation, smart materials
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