Tuning Flexibility–Rigidity Conversion of Liquid Metal/Polyurethane Composites by Phase Transition for Potential Shape Memory Application

Wu, Yunhui; Fang, Zeyang; Wu, Wenjian; Li, Kunquan; Lin, Maohua; Dang, Zhi‐Min

doi:10.1002/adem.202100372

Cited by 15 publications

(12 citation statements)

References 33 publications

(47 reference statements)

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“…41 Wu et al grafted −SH to the polyurethane (PU) surface to achieve adhesion between LM and PU. 42 Interestingly, this study can achieve good printing of LM without surface modification of TPU or LM. As it is known, the oxide film of LM plays a key role in its surface characteristics.…”

Section: Resultsmentioning

confidence: 79%

Stencil Printing of Liquid Metal upon Electrospun Nanofibers Enables High-Performance Flexible Electronics

et al. 2021

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Flexible electronics as an emerging technology has demonstrated potential for applications in various fields. With the advent of the Internet of Things era, countless flexible electronic systems need to be developed and deployed. However, materials and fabrication technologies are the key factors restricting the development and commercialization of flexible electronics. Here we report a simple, fast, and green flexible electronics preparation technology. The stencil printing method is adopted to pattern liquid metal on the thermoplastic polyurethane membrane prepared by electrospinning. Besides, with layer-by-layer assembly, flexible circuits, resistors, capacitors, inductors, and their composite devices can be prepared parametrically. Furthermore, these devices have good stretchability, air permeability, and stability, while they are multilayered and reconfigurable. As proof, this strategy is used to fabricate flexible displays, flexible sensors, and flexible filters. Finally, flexible electronic devices are also recycled and reconfigured.

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Section: Resultsmentioning

confidence: 79%

Stencil Printing of Liquid Metal upon Electrospun Nanofibers Enables High-Performance Flexible Electronics

et al. 2021

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Section: Multilayered Combinationmentioning

confidence: 99%

“…For example, utilizing the strong affinity between sulfide and metal, [87] microwave-plasma modified PU can easily adhere to Ga and gain the ability of storing elastic modulus (Figure 3H). [88] Modifying LM with Cu, Ni particles [89] or the surface of the matrix [90] is another idea. For example, Sun et al [91] prepared a Cu particle-based porous material that allows rapid and spontaneous diffusion of LM within the HCl or NaOH treated material by capillary action.…”

Section: Porous Combinationmentioning

confidence: 99%

“…[49] Taking advantage of the solid-to-liquid phase change of gallium at body temperature, the probe becomes soft and flexible within a few minutes once implanted (Figure 5A), thereby enabling self-implantation into deep brain regions with less tissue damage. Besides, a shape memory liquid metal-coated polyurethane sponge was prepared, [88] the rigidity-flexibility of which could be converted at the body temperature. What is more, Guo et al [92] fabricated semi-liquid metal (Cu-Ga-In) enabled conductive fibers, which own a dramatic stiffness variation coping with the temperature changes (as seen in Figure 5B), that is, below the melting point (8 °C) and room temperature (25 °C).…”

Section: Thermal Fieldmentioning

confidence: 99%

mentioning

confidence: 99%

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Low Melting Point Alloys Enabled Stiffness Tunable Advanced Materials

Hao

Gao

et al. 2022

Adv Funct Materials

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Stiffness tunable advanced materials have demonstrated their superiority and versatility in diverse areas, while the global pursuit of reversible, intelligent, and fast response for stiffness regulation is growing radically, leaving great challenges for traditional materials. As newly emerging functional metal material, the low melting point alloys (LMPAs) have shown encouraging potential in developing various stiffness regulation strategies owing to their excellent physicochemical and mechanical properties. This article is dedicated to presenting a comprehensive review of the LMPA‐enabled stiffness tunable materials from the aspects of material system, regulation principle and method, capability enabling mechanisms, and application scenarios. First, according to the structural differences, three kinds of LMPA‐enabled stiffness tunable material systems are evaluated. Then, the regulation strategies are elaborated from the fundamental LMPA modifications to dynamical external field controls, and the mainstream stiffness regulation modes are also combed out. Following that, the diversified applications of LMPA enabled stiffness tunable materials are systematically summarized and discussed. Finally, a perspective interpretation of the potentials and challenges of LMPA‐enabled stiffness tunable materials is provided. This article is expected to be important for guiding the future design of smart materials, functional entities, transformable robots, etc.

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Current Status and Outlook of Low‐Melting‐Point Metals in Biomedical Applications

Mao,

Kim,

Seo

2023

Adv Funct Materials

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In recent years, low‐melting‐point metals including liquid metals, exhibiting outstanding physical and chemical properties such as excellent thermal and electrical conductivity, high surface tension, and biocompatibility, have garnered increasing attention from researchers. The melting point of such metals profoundly influences their properties and determines their range of applications, and comprehending the characteristics and properties of low‐melting‐point metals is crucial for their future applications. Although studies related to liquid metals are growing exponentially in particular, reports exploring the properties and applications of low‐melting‐point metals from the perspective of the melting point are still in their early stages. This review aims to comprehensively summarize the key properties and relevant applications of current low‐melting‐point metals described in recent studies, focusing on gallium‐ and bismuth‐based metal alloys. In addition, this review discusses the opportunities and challenges associated with low‐melting‐point metals, and it is anticipated that this review will contribute to the advancement of low‐melting‐point materials in the fields of flexible electronics and biomedicine, particularly for biomedical applications.

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Tuning Flexibility–Rigidity Conversion of Liquid Metal/Polyurethane Composites by Phase Transition for Potential Shape Memory Application

Cited by 15 publications

References 33 publications

Stencil Printing of Liquid Metal upon Electrospun Nanofibers Enables High-Performance Flexible Electronics

Stencil Printing of Liquid Metal upon Electrospun Nanofibers Enables High-Performance Flexible Electronics

Low Melting Point Alloys Enabled Stiffness Tunable Advanced Materials

Current Status and Outlook of Low‐Melting‐Point Metals in Biomedical Applications

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