Reprocessable thermoset organosilicon elastomer with good self-healable and high stretchable properties for flexible electronic devices

Wu, Yumin; Jiao, Yizhi; Rong, Zhihao; Gao, Chuanhui; Liu, Yuetao

doi:10.1016/j.polymdegradstab.2022.110110

Cited by 8 publications

(5 citation statements)

References 61 publications

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“…Many metal-ligand bonds would dissociate at a relatively low temperatures (generally below 90 °C) [25][26][27] and the materials with metal-ligand bonds cannot remain the integrity of the crosslinked network. [28,29] Bao et al [30,31] investigated the coordination mode of Fe (III) with 2,6pyridinedicarboxamide, and their work provided a theoretical basis for the design of self-healing PDMS elastomers. In the present work, we attempted to introduce both irreversible covalent bonds with excellent thermal stability and metal-ligand interactions into a crosslinking network to prepare self-healing PDMS materials that can be potentially used as high temperature thermal protective coatings.…”

Section: Doi: 101002/marc202300191mentioning

confidence: 99%

Fabrication of Highly Thermally Resistant and Self‐Healing Polysiloxane Elastomers by Constructing Covalent and Reversible Networks

Cai,

Wang,

Long

et al. 2023

Macromol. Rapid Commun.

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The fabrication of self‐healing elastomers with high thermal stability for use in extreme thermal conditions such as aerospace remains a major challenge. A strategy for preparing self‐healing elastomers with stable covalent bonds and dynamic metal–ligand coordination interactions as crosslinking sites in polydimethylsiloxane (PDMS) is proposed. The added Fe (III) not only serves as the dynamic crosslinking point at room temperature which is crucial for self‐healing performance, but also plays a role as free radical scavenging agent at high temperatures. The results show that the PDMS elastomers possessed an initial thermal degradation temperature over 380 °C and a room temperature self‐healing efficiency as high as 65.7%. Moreover, the char residue at 800 °C of PDMS elastomer reaches 7.19% in nitrogen atmosphere, and up to 14.02% in air atmosphere by doping a small amount (i.e., 0.3 wt%) of Fe (III), which is remarkable for the self‐healing elastomers that contain weak and dynamic bonds with relatively poor thermal stability. This study provides an insight into designing self‐healing PDMS‐based materials that can be targeted for use as high‐temperature thermal protection coatings.

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Section: Doi: 101002/marc202300191mentioning

confidence: 99%

Fabrication of Highly Thermally Resistant and Self‐Healing Polysiloxane Elastomers by Constructing Covalent and Reversible Networks

Cai,

Wang,

Long

et al. 2023

Macromol. Rapid Commun.

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“…[28,36] Flexible superhydrophobic thin films can be based on a variety of substrates, including metals, [120] silicon-based thermoplastic elastomers, [116] and thermosetting elastomers. [121] Such substrates are typically thin, stretchable, and flexible, making them suitable for adapting to complex or irregular surfaces. These films are generally prepared using integrated surface technologies such as the template method, [122] blade coating, [123] spray coating, [124] spin coating, [125] drop casting, [126] printing, [127] electrospinning, [128] and phase separation.…”

Section: Stretchable Filmsmentioning

confidence: 99%

Durable superhydrophobic surface in wearable sensors: From nature to application

Dai,

Lei,

Ding

et al. 2023

Exploration

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The current generation of wearable sensors often experiences signal interference and external corrosion, leading to device degradation and failure. To address these challenges, the biomimetic superhydrophobic approach has been developed, which offers self‐cleaning, low adhesion, corrosion resistance, anti‐interference, and other properties. Such surfaces possess hierarchical nanostructures and low surface energy, resulting in a smaller contact area with the skin or external environment. Liquid droplets can even become suspended outside the flexible electronics, reducing the risk of pollution and signal interference, which contributes to the long‐term stability of the device in complex environments. Additionally, the coupling of superhydrophobic surfaces and flexible electronics can potentially enhance the device performance due to their large specific surface area and low surface energy. However, the fragility of layered textures in various scenarios and the lack of standardized evaluation and testing methods limit the industrial production of superhydrophobic wearable sensors. This review provides an overview of recent research on superhydrophobic flexible wearable sensors, including the fabrication methodology, evaluation, and specific application targets. The processing, performance, and characteristics of superhydrophobic surfaces are discussed, as well as the working mechanisms and potential challenges of superhydrophobic flexible electronics. Moreover, evaluation strategies for application‐oriented superhydrophobic surfaces are presented.

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“…Elastomers with flexibility and extensibility are suitable as a matrix for intelligent textile applications [ 30 ]. The best characteristics for elastomers are characteristic of matrices based on organosilicon compounds [ 31 , 32 ] and various types of polyurethane [ 33 , 34 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Properties of Organosilicon Elastomers Modified with Multilayer Carbon Nanotubes and Metallic (Cu or Ni) Microparticles

Shchegolkov,

Zemtsova

et al. 2024

Polymers

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The structural and electro-thermophysical characteristics of organosilicon elastomers modified with multilayer carbon nanotubes (MWCNTs) synthesized on Co-Mo/Al2O3-MgO and metallic (Cu or Ni) microparticles have been studied. The structures were analyzed with scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, and energy-dispersive X-ray spectroscopy (EDX). The main focus of this study was the influence of metallic dispersed fillers on the resistance of a modified elastomer with Cu and Ni to the degradation of electrophysical parameters under the action of applied electrical voltage. The distribution of the temperature field on the surface of a modified polymer composite with metallic micro-dimensional structures has been recorded. The collected data demonstrate the possibility of controlling the degradation caused by electrical voltage. It has been found that repeated on/off turns of the elastomer with an MWCNTs on 50 and 100 cycles leads to a deterioration in the properties of the conductive elastomer from the available power of 1.1 kW/m2 (−40 °C) and, as a consequence, a decrease in the power to 0.3 kW/m2 (−40 °C) after 100 on/off cycles. At the same time, the Ni additive allows increasing the power by 1.4 kW/m2 (−40 °C) and reducing the intensity of the degradation of the conductive structures (after 100 on/off cycles up to 1.2 kW/m2 (−40 °C). When Ni is replaced by Cu, the power of the modified composite in the heating mode increases to 1.6 kW/m2 (−40 °C) and, at the same time, the degradation of the conductive structures in the composite decreases in the mode of cyclic offensives (50 and 100 cycles) (1.5 kW/m2 (−40 °C)). It was found that the best result in terms of heat removal is typical for an elastomer sample with an MWCNTs and Cu (temperature reaches 93.9 °C), which indicates an intensification of the heat removal from the most overheated places of the composite structure. At the same time, the maximum temperature for the Ni additives reaches 86.7 °C. A sample without the addition of a micro-sized metal is characterized by the local unevenness of the temperature field distribution, which causes undesirable internal overheating and destruction of the current-conducting structures based on the MWCNTs. The maximum temperature at the same time reaches a value of 49.8 °C. The conducted studies of the distribution of the micro-sizes of Ni and Cu show that Cu, due to its larger particles, improves internal heat exchange and intensifies heat release to the surface of the heater sample, which improves the temperature regime of the MWCNTs and, accordingly, increases resistance to electrophysical degradation.

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Reprocessable thermoset organosilicon elastomer with good self-healable and high stretchable properties for flexible electronic devices

Cited by 8 publications

References 61 publications

Fabrication of Highly Thermally Resistant and Self‐Healing Polysiloxane Elastomers by Constructing Covalent and Reversible Networks

Fabrication of Highly Thermally Resistant and Self‐Healing Polysiloxane Elastomers by Constructing Covalent and Reversible Networks

Durable superhydrophobic surface in wearable sensors: From nature to application

Properties of Organosilicon Elastomers Modified with Multilayer Carbon Nanotubes and Metallic (Cu or Ni) Microparticles

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