Water-responsive actuators based on the solution casted PVA/epoxidized-SBS two-way shape memory bilayer composite film

Ren, Sijia; Feng, Jiachun

doi:10.1039/d0tc00086h

Cited by 14 publications

(15 citation statements)

References 41 publications

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“…Once again, when this 2D‐shaped flower was immersed in water, it was able to regain its 3D closed state. Thus, the shape can actuate between two shapes (2D shape (blooming state) and 3D shape (closed state)) simultaneously via the drying and wetting process 158 . Another example is the claw‐shaped actuator which was shown to grab a screw weighing 1.05 gm (25 times of itself) when immersed in the water for 10 min.…”

Section: Sbs‐based Two‐way Shape Memory Polymersmentioning

confidence: 99%

“…The PVA/e‐SBS based (A) flower‐like and (B) claw‐like actuators that show two‐way shape memory property when during the drying and the wetting process, reprinted with permission from Reference 158, copyright Royal society of chemistry, 2020. PVA, poly(vinyl alcohol); SBS, styrene butadiene styrene…”

Section: Sbs‐based Two‐way Shape Memory Polymersmentioning

confidence: 99%

“…Additionally, owing to the plasticization effect of the PVA by the water molecules, the glass transition temperature of the PVA was depressed. Both of these factors led to the bending of the bilayer 158 . The sample kept bending until the recovery stress of the E‐SBS layer was equal to the swelling stress of the PVA layer.…”

Section: Sbs‐based Two‐way Shape Memory Polymersmentioning

confidence: 99%

“…In addition to thermoresponsive two‐way SBS‐based shape memory elastomers, water‐responsive actuators have also been developed lately in applications to heat‐sensitive environments. Ren and his coworkers developed water responsive actuators based on bilayer composite comprising of poly(vinyl alcohol) (PVA) and SBS by a dual solution casting method 158 . Moreover, SBS was epoxidized (E‐SBS) to improve polarity, enabling higher water sensitivity.…”

Section: Sbs‐based Two‐way Shape Memory Polymersmentioning

confidence: 99%

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Styrene‐butadiene‐styrene‐based shape memory polymers: Evolution and the current state of art

Basak

Bandyopadhyay

2022

Polymers for Advanced Techs

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Styrene butadiene styrene (SBS) block copolymers comprise of two phases structured domains involving polystyrene "hard" domains and butadiene "soft" domains.The styreneic domains provide a physical crosslink that enables SBS to behave like a highly flexible thermoplastic elastomer. Recently, with the rise of smart elastomers, SBS-based matrices are being extensively used in transforming them into elastomers that can exhibit shape change when excited with a range of stimuli (shape memory elastomers). With the advantages of long-range elasticity, reprocessability, and ability to be modified into various tailor-made shape morphing elastomers, the use SBSbased elastomers has exceptionally risen in the scope of deployable structures temperature sensors, snap fittings, and actuators. This review attempts to tether the recent development in SBS-based shape memory polymers along with highlighting the fabrication routes and the shape memory mechanistic pathway. The review introduces the concept of shape memory polymers, classification, and their characterization, followed by shape memory elastomers and finally one way/two-way SBS-based shape memory elastomers. In an attempt to blend both the scientific and the engineering realm, the narrative provides a concise overview of SBS-based shape morphing polymers' expanding boundaries.

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Section: Sbs‐based Two‐way Shape Memory Polymersmentioning

confidence: 99%

Section: Sbs‐based Two‐way Shape Memory Polymersmentioning

confidence: 99%

Section: Sbs‐based Two‐way Shape Memory Polymersmentioning

confidence: 99%

Section: Sbs‐based Two‐way Shape Memory Polymersmentioning

confidence: 99%

See 2 more Smart Citations

Styrene‐butadiene‐styrene‐based shape memory polymers: Evolution and the current state of art

Basak

Bandyopadhyay

2022

Polymers for Advanced Techs

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“…Water not only had a driving function but also reduced the moduli of the matrix and hinge films because of the solvent effect. [32][33][34] Dynamic mechanical analysis (DMA) of the matrix and hinge films was conducted in air and water. It was found that the moduli of the matrix and hinge films decreased in water (Figure S6, Supporting Information).…”

Section: Control Mechanism In Shape-programming Processmentioning

confidence: 99%

Dual‐Control Mechanism of Water and Temperature in Automatically Programmable Shape Memory Polymers

Zhang

Heng

et al. 2022

Macro Materials & Eng

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Auto-programmable shape memory polymers (AP-SMPs) can deform automatically without external manipulation, exhibiting either a free-standing temporary shape or a permanent shape. The unique shape memory behaviors derive mainly from control by two factors, water and temperature. However, the control mechanism is unknown. This study analyzes and demonstrates the dual-control mechanism of water and temperature in the three shape-changing processes of AP-SMPs. First, the AP-SMP is immersed in warm water (50 °C). Asymmetric swelling of bilayer films provides the driving force for the shape auto-programming of the AP-SMP. The solvent effect of water reduces the glass transition temperature (T g ) of the AP-SMP, which becomes lower than the medium temperature in warm water. AP-SMP can be programmed automatically. Then, the AP-SMP is removed from water and placed in air at room temperature. The T g value of the matrix film increases notably in air and exceeds the medium temperature. The temporary shape of the AP-SMP can thus be fixed. Finally, the AP-SMP can quickly return to its permanent shape when the medium temperature exceeds the matrix film T g in air. The dual control shape memory mechanism provides insights into the design and development of AP-SMPs.

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Stimuli–Responsive Mechanoadaptive Elastomeric Composite Materials: Challenges, Opportunities, and New Approaches

Dolui,

Natarajan,

et al. 2023

Adv Eng Mater

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Stimuli‐responsive mechano‐adaptive materials, capable of reversibly changing their mechanical properties when exposed to an external stimulus, are the next generation of smart materials with immense transformative potential for various technological applications. Although the concept of adaptive mechanical properties has been proven for some materials, it remains very challenging for soft elastomeric materials. The aim of this review is to provide new ideas and strategies for the development of mechano‐adaptive elastomeric composites using commercial rubber as the matrix polymer. The fundamental question addressed here is: How do the phase‐responsive functional fillers alter the mechanical properties? For a given physical network environment, what is the mechanism that gives rise to the stimuli‐responsive properties of the resulting composites?? This paper summarizes the preparation, structure and properties of recently developed mechano‐adaptive elastomeric materials. Furthermore, based on their structure‐property relationships, plausible applications of these smart materials in various technology‐specific applications such as soft robotics, actuators, sensors, smart tires, automotive design, aerospace etc. are demonstrated with representative examples. Finally, the paper critically discusses the existing challenges in the field of mechano‐adaptive elastomers in order to provide valuable insights in this area.This article is protected by copyright. All rights reserved.

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Water-responsive actuators based on the solution casted PVA/epoxidized-SBS two-way shape memory bilayer composite film

Abstract: Water-responsive actuators have been an increasing interest in various applications. In this work, water-responsive actuators based on bilayer composite film were prepared using commercialized PVA and SBS by a two-step...

Cited by 14 publications

References 41 publications

Styrene‐butadiene‐styrene‐based shape memory polymers: Evolution and the current state of art

Styrene‐butadiene‐styrene‐based shape memory polymers: Evolution and the current state of art

Dual‐Control Mechanism of Water and Temperature in Automatically Programmable Shape Memory Polymers

Stimuli–Responsive Mechanoadaptive Elastomeric Composite Materials: Challenges, Opportunities, and New Approaches

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