Dual-functional polymer blends with rapid thermo-responsive shape memory and repeatable self-healing properties

Yan, Wenqiang; Ding, Yan; Zhang, Run; Luo, Xinjie; Sheng, Pinghou; Xue, Ping; He, Jing

doi:10.1016/j.polymer.2021.124436

Cited by 32 publications

(40 citation statements)

References 65 publications

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“…Figure 5A illustrates that the RB f value presents a significant temperature dependence. [ 44 ] The RB f value buildups from 85 to 115°C for the reason that more molecular chain segments are activated to act as the “soft phase” and increase the proportion of the “soft phase.” [ 45 ] Specifically, the RB f of CNT modified samples increases first and then decreases with the increase of CNT content at 115°C. Nevertheless, the value has little change compared with the C00, and the variation scope is very small from ~95% to ~98%.…”

Section: Resultsmentioning

confidence: 99%

“…[44] The RB f value buildups from 85 to 115 C for the reason that more molecular chain segments are activated to act as the "soft phase" and increase the proportion of the "soft phase." [45] Specifically, the RB f of CNT modified samples increases first and then decreases with the increase of CNT content at 115 C. Nevertheless, the value has little change compared with the C00, and the variation scope is very small from $95% to $98%. It demonstrates that the exceptional mobility and flexibility of UHMWPE molecular chains are the crux to ensure physical entanglement and maintain unsurpassed RB f.…”

Section: Bending Shape Memory Testmentioning

confidence: 88%

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Analysis of thermal‐active bending and cyclic tensile shape memory mechanism of UHMWPE/CNT composite

et al. 2022

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The exploitation of shape memory ultra‐high‐molecular‐weight polyethylene (UHMWPE) can expand the application field as an intelligent material; however, low shape recovery ratio limits its further practical application. Herein, carbon nanotubes (CNT) are used to improve shape memory property of UHMWPE. Interestingly, after analyzing the bending and cyclic tensile shape memory properties of UHMWPE/CNT composite, it is found that bending shape memory property of UHMWPE/CNT composite is improved dramatically, while cyclic tensile shape memory property is not. The optimal bending shape memory property with shape fixity ratio of more than 95% and shape recovery ratio of about 94% can be obtained at 115°C. However, the shape recovery ratio in cyclic tensile shape memory test is only changed from 62.72% to 65.63%, and the shape fixity ratio is reduced from 85.82% to 82.83%. The main reason for this phenomenon is the possible difference in thermal‐active bending and cyclic tensile shape memory mechanism: CNT engender forced deformation in bending shape memory, while it does not exhibit in cyclic tensile shape memory. The outstanding bending shape memory property of UHMWPE/CNT composite make it possible for more promising applications.

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Section: Resultsmentioning

confidence: 99%

Section: Bending Shape Memory Testmentioning

confidence: 88%

Analysis of thermal‐active bending and cyclic tensile shape memory mechanism of UHMWPE/CNT composite

et al. 2022

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“…[ 56 ] Finally, the ionic bonds of COO − and Zn 2+ reassociate and form Zn clusters during cooling after reaching the healed status of the film along the Zn cluster. [ 57 ] The stress–strain curves of PVB‐COO‐Zn 10 were demonstrated under varying healing times and temperatures. The film samples were cut in half with a razor blade before being later brought back into contact and healed.…”

Section: Resultsmentioning

confidence: 99%

Controllable Physical Synergized Triboelectricity, Shape Memory, Self‐Healing, and Optical Sensing with Rollable Form Factor by Zn cluster

et al. 2022

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To build devices offering users comfortable experience, it is important to focus on form factor and multifunctionality. In this study, for the first time, multifunctional Zn clusters with shape memory, self‐healing, triboelectricity, and optical sensing synergized with rollable form factor are designed and fabricated by coordinating COO− and Zn2+. As pore forming agent, Zn clusters produce hierarchical porous structure depending on Zn amount. Zn clusters are applied as message transmitters and charge containers in optical sensing and corona charge injection, respectively. Moreover, Zn clusters in PVB‐COO‐Zn serve as positive tribomaterial due to Zn ion doping effect, increasing the output performance as the Zn amount reaches 20 wt%. In addition, injecting positive charge into PVB‐COO‐Zn 20 lead to more than 24 times increase in output performance compared to those of non‐porous structures. The reversibility of Zn clusters endows shape memory and self‐healing, synergized with the rollable form factor. The rollability is implemented using the long alkyl chain and the energy absorption of porous structure, providing damage resistance. The advancements in this work provide opportunities for multifunctional and unique applications (shape memory rotating‐triboelectric nanogenerator, rollable self‐healing touchpad, hidden tag) synergized with rollability that accomplishes working in broadened condition in near future.

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“…Shape Memory Functional Polyolefins. Shape memory polymers (SMPs) are a class of polymers that change shape upon exposure to an external trigger, such as heat, 236,237 light, 238 electric or magnetic fields, 239 and so on. 240 Radiation cross-linked low-density polyethylene (XLDPE) was the original SMP.…”

Section: Smart Functional Polyolefinsmentioning

confidence: 99%

Tailor-Made Functional Polyolefins of Complex Architectures: Recent Advances, Applications, and Prospects

2022

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Polyolefins play a crucial role in the polymer industry because of their low-cost monomers and well-established production processes. Recent years have witnessed tremendous progress in direct and tandem copolymerization strategies that provide an opportunity of developing polyolefins bearing polar groups with distinctive architectures and properties. In this perspective, we first highlight new routes for the proficient synthesis of tailor-made functional polyolefins and briefly discuss their designing tactics. Then, we attempt to categorize these, recently appeared in the literature, innovative functional polyolefins on the basis of their applications. The prospected future applications of polar olefin copolymers include biomedical materials, catalysts, energy storage devices, and conductive polymers, which open up new arenas and paradigms for academic research and industrial products development. Critical issues concerning intelligent functional polyolefins and green chemistry are discussed, too.

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Dual-functional polymer blends with rapid thermo-responsive shape memory and repeatable self-healing properties

Cited by 32 publications

References 65 publications

Analysis of thermal‐active bending and cyclic tensile shape memory mechanism of UHMWPE/CNT composite

Analysis of thermal‐active bending and cyclic tensile shape memory mechanism of UHMWPE/CNT composite

Controllable Physical Synergized Triboelectricity, Shape Memory, Self‐Healing, and Optical Sensing with Rollable Form Factor by Zn cluster

Tailor-Made Functional Polyolefins of Complex Architectures: Recent Advances, Applications, and Prospects

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