Recent advances and perspectives of shape memory polymer fibers

Wei, Wanting; Liu, Junhao; Cao, Feng; Qian, Kun; Yao, Yongtao; Li, Wenbing

doi:10.1016/j.eurpolymj.2022.111385

Cited by 28 publications

(18 citation statements)

References 120 publications

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“…Therefore, an optimized level of polymer components needs to be incorporated into the blends. As shown in the figure, the binary alloyed systems result in minimal released energy upon heating and consequent shortening (contracting) of the fibers as shown by the green, blue and red solid curve [12,16]. However, ABS systems loaded with 50 and 25wt% of TPU and EVA, respectively, lead to greater energy released as shown by the gray and black solid curve.…”

Section: Blocked Force Energy Releasementioning

confidence: 94%

“…However, the ability of SMP parts to exhibit appropriate mechanical performance might be a pressing challenge as seen in the development of orthodontic filaments, surgical sutures and fibers in the devolvement of artificial muscles in humanoids or those used as scaffolds [13]. One underlying role of SMP parts derived from mechanical characteristics is the amount of energy stored in the secondary phase of SMPs to be released upon stimulus [14][15][16]. The higher the stored strain energy, the greater the recovery ratio of the specimens.…”

Section: Introductionmentioning

confidence: 99%

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High Energy Release-high Retraction Smart Polymer Fibers used in Artificial Muscle Fabrication

Karevan

Motalleb

Jannesari

et al. 2023

IJE

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Shape-memory polymers (SMPs) could remember their original shape and then, return to their initial shape upon stimulus. So far, quantities such as fixity and recovery ratio of SMPs have been broadly reported. Nevertheless, one main issue is the existence and use of an appropriate approach to quantitatively estimate the SMPs released energy. In addition, it is hypothesized that the elastic behavior of SMPs plays an underlying role when SMP fibers need to exhibit high-tension and high-elongation capacity as required in synthetic muscles. Here, we present, for first time, SMP trinary bulk and filament systems of acrylonitrile butadiene styrene (ABS)/thermoplastic polyurethane (TPU)/ethylene vinyl acetate (EVA) fabricated under calendering intense shear mixing and hot pressing. A digital blocked force load cell was used to record specimens energy released. The results exhibited high retraction from the specimens secondary shape correlated to the tensile behavior. It was shown the blended system of 50, 25 and 25% of TPU, ABS and EVA, respectively, resulted in ~640% and 3900% increase in the elastic modulus and energy release compared to EVA/TPU systems. The double SMP filaments led to a 50% increase in the energy release compared to single fibers. Nevertheless, the blended binary specimens with the TPU/ABS ratio of 50/50 exhibited 600% increase in tensile strength. It was confirmed the elastic modulus, number of fibers and elongation at break govern the SMP stored. The findings of the research lightened a new class of SMPs to be used as fiber-based artificial muscles and orthodontic products.

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Section: Blocked Force Energy Releasementioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

High Energy Release-high Retraction Smart Polymer Fibers used in Artificial Muscle Fabrication

Karevan

Motalleb

Jannesari

et al. 2023

IJE

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“…[310] Light-actuated structures are usually fabricated by incorporating photo-responsive moieties (e.g., azobenzene derivatives) in the polymer. [311][312][313] Light triggering exhibits adjustable irradiation parameters (wavelength and light intensity) and excellent programmable properties. [314] The choice of wavelength to induce photoreactions is extremely important for actuations and other biomedical applications.…”

Section: Photo-responsive Polymersmentioning

confidence: 99%

Recent Advances in the Additive Manufacturing of Stimuli‐Responsive Soft Polymers

Tariq,

Arif,

Khalid

et al. 2023

Adv Eng Mater

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Stimuli‐responsive polymers (SRPs) are special types of soft materials, which have been extensively used for developing flexible actuators, soft robots, wearable devices, sensors, self‐expanding structures, and biomedical devices, thanks to their ability to change their shapes and functional properties in response to external stimuli including light, humidity, heat, pH, electric field, solvent, and magnetic field or combinations of two or more of these stimuli. In recent years, additive manufacturing (AM) aka three‐dimensional (3D) printing technology of these SRPs, also known as four‐dimensional (4D) printing, has gained phenomenal attention in different engineering fields, thanks to its unique ability to develop complex, personalized, and innovative structures, which undergo twisting, elongating, swelling, rolling, shrinking, bending, spiraling, and other complex morphological transformations. Herein, an effort has been made to provide insightful information about the AM techniques, type of SRPs, and their applications including, but not limited to tissue engineering, soft robots, bionics, actuators, sensors, construction, and smart textiles. This article also incorporates the current challenges and prospects, hoping to provide an insightful basis for the utilization of this technology in different engineering fields. It is expected that the amalgamation of 3D printing with SRPs would provide unparalleled advantages in different engineering arenas.This article is protected by copyright. All rights reserved.

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“…One‐way (1‐Way), 75 two‐way (2‐Way), 76 dual shape memory effect (DSME), 77 triple shape memory effect (TSME), 77 and multiple SMEs 78 are all possible in SMPs. The thermo‐responsive 1‐way SMPs were configured to a deformed state and then recovered whenever heated well above the phase transition temperature.…”

Section: Basics Of Smpsmentioning

confidence: 99%

Recent trends in thermo‐responsive elastomeric shape memory polymer nanocomposites

et al. 2023

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Shape memory polymers (SMPs) are polymeric smart materials, a class of stimuli‐responsive polymers that can return to their initial shape from a programmed temporary shape under the application of external stimuli, such as light, heat, magnetism, and electricity. Because of these unique features, SMPs can find applications in many fields, like aerospace, biomedical devices, flexible electronics, soft robotics, shape memory arrays, and 4D printing. The comparatively low density, low cost, easy biodegradability, and biocompatibility make SMPs a better candidate for shape memory applications. Among them, thermo‐responsive SMPs can revert to their permanent shape depending on a temperature greater than their polymer transition temperature. Thermo‐responsive SMPs combine semi‐crystalline or elastomeric polymers with improved mechanical and electrical properties. Integrating nanofillers into the polymer elastomer matrices can further enhance these properties, forming shape‐memory polymer nanocomposites (SMPNCs). This review focuses on the basics, design, and classifications of thermo‐responsive SMPs and the characteristics of elastomers and blends of polymers used. Incorporating various nanofillers to get SMPNCs to have improved properties over SMPs is also presented. The importance of Tg (glass transition temperature) and Tm (melting temperature) based SMPs and SMPNCs, various elastomers used, and the methods for preparation like solution casting, melt compounding, in situ polymerization, and their possible future applications are also discussed.

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Recent advances and perspectives of shape memory polymer fibers

Cited by 28 publications

References 120 publications

High Energy Release-high Retraction Smart Polymer Fibers used in Artificial Muscle Fabrication

High Energy Release-high Retraction Smart Polymer Fibers used in Artificial Muscle Fabrication

Recent Advances in the Additive Manufacturing of Stimuli‐Responsive Soft Polymers

Recent trends in thermo‐responsive elastomeric shape memory polymer nanocomposites

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