Thermomechanically Triggered Reversible Multi‐Transformability of a Single Material System by Energy Swapping and Shape Memory Effects

Song, Chao; Zou, Bihui; Cui, Zhiming; Liang, Zihe; Ju, Jaehyung

doi:10.1002/adfm.202101395

Cited by 19 publications

(12 citation statements)

References 54 publications

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“…Nevertheless, with the rapid development of science and technology, traditional single stimulus-responsive SMPs of dual or one-way shape memory effect obviously could not meet the requirement of engineering structures and applications. Thus, multifunctional SMPs, including multiple SMPs and multiple stimuli-responsive SMPs, have become the research hotspot. − In a multiple SMPs system, multiple different transition temperatures or a wide range of transition temperature would be the key. The multistep shape recovery behaviors could be achieved through controlling the programming switching temperature. − In a two-way SMPs system, liquid crystal elastomer (LCE) materials are the mostly utilized because of the unique reversible deformation ability. , As for the fabrication of multiple stimuli-responsive SMP based composites, functional fillers, such as electrothermal carbon nanotubes (CNTs), magnetocaloric Fe 3 O 4 particles, and photothermal Au particles, could be incorporated into SMPs matrix to achieve the multiple stimuli-responsive shape memory behaviors.…”

Section: Introductionmentioning

confidence: 99%

Zwitterionic Poly(aryl ether ketone) with Water-Actuated, Reshaping-Reconfiguration Ability and Triple Shape Memory Effect

Yang

Leng

2022

ACS Appl. Polym. Mater.

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We synthesized shape memory poly(aryl ether ketone) (PAEK) and grafted carboxylic acid pyridine zwitterions onto the main chains for fabricating the zwitterionic PAEK (ZPAEK) material. ZPAEK exhibited a T g of around 120 °C, great thermal stability, and mechanical performances, and heat-triggered shape memory behaviors, including high shape recovery ratio (over 98.7%) and fixity ratio (over 98%). Besides, we improved the hydrophilicity of PAEK by incorporating carboxylic acid pyridine zwitterions, for the first time, achieving the exceptional water-actuated shape memory behaviors for PAEK at room temperature. Furthermore, the controllable reconfiguration behaviors were achieved through the interaction between carboxylic acid pyridine zwitterions and water molecules. For the sample of any temporary shape, after absorbing water, its previous original shape was eliminated, and the deformed temporary shape could be redefined as the “original” shape to construct an unprecedented shape memory cycle, never returning to the first original shape. Additionally, the excellent triple shape memory behaviors of sample were obtained after absorbing water. After the programmable shape fixation processes, the sample of temporary shape could recover to the original shape through the two stages: one was at 110 °C, and the other was at 140 °C. We did believe the water-actuated, reconfigurable, and triple shape memory ZPAEK could be an ideal substitute material for smart sensors and actuators.

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Section: Introductionmentioning

confidence: 99%

Zwitterionic Poly(aryl ether ketone) with Water-Actuated, Reshaping-Reconfiguration Ability and Triple Shape Memory Effect

Yang

Leng

2022

ACS Appl. Polym. Mater.

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“…Most prominently in the span of the last two decades, different classes of these structures have been successfully implemented in numerous industries including biomedical [12,13] and protective devices [14][15][16], sports equipment [17] as well as electronics [18,19]. One of the most promising directions of studies related to such easily-applicable functional materials is that devoted to mechanical metamaterials [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. Mechanical metamaterials are rationally designed structures that can exhibit counterintuitive mechanical properties based primarily on their design rather than their chemical composition.…”

Section: Introductionmentioning

confidence: 99%

Micro-scale Mechanical Metamaterial with a Controllable Transition in the Poisson's Ratio and Band Gap Formation

Dudek,

Martínez,

Ulliac

et al. 2023

Preprint

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The ability to change significantly mechanical and wave propagation properties of a structure without rebuilding it has been one of the main challenges in the field of mechanical metamaterials. This stems from the enormous appeal that, especially in the case of micro-scale systems, such tunable behavior may offer from the perspective of applications ranging from biomedical to protective devices. In this work, a novel micro-scale mechanical metamaterial is proposed that can undergo a transition from one type of configuration to another, with one configuration having a very negative Poisson's ratio, corresponding to strong auxeticity, and the other having a highly positive Poisson's ratio. The formation of phononic band gaps, at the same time, can be controlled, which can be very useful in the design of vibration dampers and sensors. Finally, it is shown experimentally that reconfiguration of the system, leading to a change in its properties, can be induced and controlled remotely through application of a magnetic field, thanks to appropriately distributed magnetic inclusions.

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“…Shape morphing, [1][2][3][4][5][6][7][8] utilizing the topological or space-time properties [9][10][11] and the ability to control mechanical properties [12] of functional materials [13][14][15][16][17][18][19][20][21][22][23] remain some of the main challenges in materials science. At the same time, the possibility of constructing materials possessing such properties is in high demand as it may lead to the design of structures superior to currently known biomedical and other devices used in various industries.…”

Section: Introductionmentioning

confidence: 99%

Micro‐Scale Auxetic Hierarchical Mechanical Metamaterials for Shape Morphing

et al. 2022

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years, it has been possible to note an emergence of promising directions of studies that address the possibility of observing these effects. In fact, one of the most interesting directions of studies related to this topic are mechanical metamaterials, [3,[28][29][30][31][32] that is, structures that can exhibit counterintuitive mechanical behavior based primarily on their design. Mechanical metamaterials are known for their ability to exhibit counterintuitive mechanical properties such as auxetic behavior, [33][34][35][36][37][38][39][40] negative stiffness [2,41] and negative compressibility [42,43] that are essential in many industries. However, in a vast majority of cases, standard mechanical metamaterial proved insufficient while searching for structures capable of exhibiting versatile deformation patterns. This in turn led to intensive studies devoted to hierarchical mechanical metamaterials, [44][45][46] that is, structures composed of elements having their own geometry that normally can deform irrespective of the rest of the system.Despite the large popularity of hierarchical mechanical metamaterials, it is a relatively new thread in the field of mechanical metamaterials. It seems that some of the first studies devoted to this topic were published by Gatt et al. [45] and Cho et al. [46] where the famous hierarchical rotating square system was proposed. In the following years, it was demonstrated [45][46][47][48][49] that this structure can exhibit tunable auxetic behavior where the extent of auxeticity depends on the relative rate of the deformation of hierarchical levels constituting the system. Recently, it was also reported that the design of the hierarchical square system can be modified in order to change its characteristic. [4,[50][51][52][53] Similar studies based primarily on the extent of the observed auxeticity were also conducted for structures based on rotating rectangles [54] as well as re-entrant and other honeycombs. [54][55][56][57][58] Even though the concept of hierarchical mechanical metamaterials proved to be very popular and resulted in numerous publications, it is possible to note that the hierarchical structures proposed up to date normally share several limitations. First, most of the known hierarchical mechanical metamaterials are designed in a way where their different hierarchical levels correspond either to the same deformation mechanism or to structures having very similar Poisson's ratio. Hence, the possible range of the resultant auxetic behavior is relatively small and may prove to be insufficient in the case of applications where functional materials must significantly change their mechanical response. Another limitation of the already reported hierarchical metamaterials is the fact that in a vast majority of cases, their ability to exhibit the tunable mechanical behavior Shape morphing and the possibility of having control over mechanical properties via designed deformations have attracted a lot of attention in the materials community and led to a variety of applications w...

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Thermomechanically Triggered Reversible Multi‐Transformability of a Single Material System by Energy Swapping and Shape Memory Effects

Cited by 19 publications

References 54 publications

Zwitterionic Poly(aryl ether ketone) with Water-Actuated, Reshaping-Reconfiguration Ability and Triple Shape Memory Effect

Zwitterionic Poly(aryl ether ketone) with Water-Actuated, Reshaping-Reconfiguration Ability and Triple Shape Memory Effect

Micro-scale Mechanical Metamaterial with a Controllable Transition in the Poisson's Ratio and Band Gap Formation

Micro‐Scale Auxetic Hierarchical Mechanical Metamaterials for Shape Morphing

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