Organic–inorganic nanocomposite bilayers with triple shape memory effect
Abstract
Various amounts of silica nanoparticles were chemically incorporated into amorphous polyurethanes (PU) of two different molecular weights by sol–gel reactions, and the effects were studied in terms of mechanical, dynamic mechanical, dual, and triple shape memory effects (DSME and TSME) of the nanocomposite films. It was found that the silica particles act as multifunctional cross-links as well as reinforcing fillers and significantly augmented the glassy and rubbery state moduli, yield strength, break strength, glass transition temperature, and dual shape memory properties. A cohesive bilayer of the two films fabricated from an interpenetrating polymer network (IPN) exhibited synergistic mechanical properties in the glassy and rubbery states along with two undisturbed glass transitions by which an intermediate plateau region and TSME were demonstrated.
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Alternative methods for creating multiple, well-separated switching transitions in one system consist of laminating two SMPs with well-separated transition temperatures or developing hybrid SMPs with multiple thermal transitions.
“Alternative methods for creating multiple, well-separated switching transitions in one system consist of laminating two SMPs which have well-separated transition temperatures [76,77] or of developing hybrid SMPs with multiple thermal transitions [78-81].”
From Two-Way and Multiple-Way Shape Memory Polymers for Soft Robotics: An Overview (2020) · cites this paper as [77]
SMPU bi-layer films of different molecular weights with silica particles as multifunctional cross-links and reinforcing fillers exhibited two undisturbed glass transitions and demonstrated triple SME.
“The bi-layer material formed from the two films exhibited two undisturbed glass transition.Triple SME was demonstrated.”
From A review of stimuli-responsive shape memory polymer composites (2013) · cites this paper as [458]
Several t- and/or m-SMPs systems related to two (or more) distinct switching transition domains have been reported.
“Up to date, several t- and/or m-SMPs systems related to two (or more) distinct switching transition domains have been reported [64-74].”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [68]
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- Authors
- Bae, C. Y., Park, J. H., Kim, E. Y., Kang, Y. S., & Kim, B. K.
- Affiliations
- Pusan National University (KR)
- Sogang University (KR)
- Corresponding author
- Kim, B. K.
- Venue
- Journal of Materials Chemistry
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2011
- Volume
- 21
- Issue
- 30
- Pages
- 11288
- ISSN
- 0959-9428 (ISSN-L)
- 1364-5501
- OpenAlex
- W2047310465
- Cited by
- 88
- References
- 25
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 1 · 2023: 1 · 2022: 5 · 2021: 3 · 2020: 2 · 2019: 6 · 2018: 4 · 2017: 11 · 2016: 6 · 2015: 12 · 2014: 5 · 2013: 15 · 2012: 11
- FWCI
- 9.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Materials Chemistry (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Materials Science › Materials Chemistry › Material Dynamics and Properties
- Keywords
- shape memory effect, triple shape memory effect, silica nanoparticles, organic-inorganic hybrid materials, sol-gel, interpenetrating polymer networks, nanocomposite films, mechanical properties, glass transition temperature, yield strength
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