The self‐healing cross‐linked polyurethane by Diels–Alder polymerization

Wei, Yuezhou; Ma, Xiaoyue

doi:10.1002/adv.21857

Cited by 31 publications

(14 citation statements)

References 38 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 16 ] Therefore, intrinsic self‐healing polymers have attracted increasing attention in the fields of flexible pressure sensors, bending sensors, and so on. In recent years, several strategies based on thermo‐reversible covalent bonds (Diels–Alder reactions, [ 17–19 ] transesterification, [ 20 ] disulfide exchange, [ 21–23 ] acylhydrazone bonds, [ 24,25 ] nitroxide bonds, [ 26 ] etc.) or dynamic non‐covalent bonds (hydrogen bonds, [ 27–29 ] metal–ligand coordination, [ 30–32 ] etc.…”

Section: Introductionmentioning

confidence: 99%

Self‐Healing Polyurethane Elastomer Based on Crosslinked‐Linear Interpenetrating Structure: Preparation, Properties, and Applications

Liu

Zhou

et al. 2021

Macro Materials & Eng

View full text Add to dashboard Cite

Despite tremendous advances in the preparation of self‐healing flexible strain sensor devices, it remains a great challenge to large‐area synthesis, relatively high mechanical strength, and sensitive sensing properties into one self‐healing materials system, which have received increasing interests because of their many potential applications. Herein, the design and synthesis of a crosslinked‐linear interpenetrating structure polymer containing disulfide and hydrogen bonds is reported to address this conundrum. The resulting self‐healable polymer is highly stretchable (up to 551.7%) with a high tensile strength (4.14 MPa) and excellent healing efficiency of similar to 90% at mild temperature without using any external reagents. Furthermore, a novel method for fabricating flexible sensor is also proposed to endow the resulted sensor with large‐area (20 cm × 12 cm), low cost, and outstanding sensitivity to strain, which makes it very suitable for human motion monitoring applications. This work will provide afflatus on future design, fabrication, and application of self‐healing flexible strain sensor devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Self‐Healing Polyurethane Elastomer Based on Crosslinked‐Linear Interpenetrating Structure: Preparation, Properties, and Applications

Liu

Zhou

et al. 2021

Macro Materials & Eng

View full text Add to dashboard Cite

show abstract

“…A representative example is the Diels-Alder (DA) click reaction, consisting in an organic reaction between a conjugated diene and a substituted electron-attractor alkene (termed as dienophile) that form a substituted ciclohexene. [87][88][89] The bond between the diene and the dienophile is prone to breakage during material fracture and can easily reform through a simple procedure. In fact, a rise of temperature (up to ≈60-80 °C) drives the retro-DA reaction and produces a number of functional groups that, upon cooling, are ready to react and reform the broken bonds, so activating the thermally induced self-healing of the material.…”

Section: Covalent Bond-based Materialsmentioning

confidence: 99%

Exploiting Self‐Healing in Lithium Batteries: Strategies for Next‐Generation Energy Storage Devices

Mezzomo

Ferrara

Brugnetti

et al. 2020

Advanced Energy Materials

View full text Add to dashboard Cite

An improved lifetime can be achieved by exploiting higher intrinsic durability of the materials, or by repairing the deteriorated component and restoring its original properties. Indeed, in the last years, several attempts to improve the lifetime of widespread devices (prosthetics, batteries, solar cells, lighting devices, etc.) were reported. [4-8] However, traditional techniques (welding, gluing, patching) need in situ application of fresh healing materials, and are not applicable to many modern complex devices that require disassembly and targeted operations well beyond the expertise of the final user. Moreover, repair by specialized personnel may be impossible or unsustainable from an economic point of view. To overcome these problems, a radically new strategy that can pave the way for more durable materials is emerging: the concept of selfhealing (SH). [9] This term refers to those smart materials that can automatically restore some, or all, of their functions after having suffered of an external damage that degraded their original properties. This usually has to do with autonomous recovery of physical cracks, but may include a wider range of features prolonging the lifetime of a material/ device, which space from anticorrosion to bactericidal properties. [10,11] By tailoring an appropriate response of the system, it becomes possible to design a material that can respond to various external perturbations and accommodate their eventual disturbance. The idea at the base of this approach is usually defined as biomimetic, since it takes inspiration from nature and mimic it in solving complex technological problems. [12] During the years, many different materials or technologies, naively depicted in Figure 1a, have taken inspiration from nature (as Velcro tape which mimics tiny hooks on bur fruits, naturally ventilated facades that mime termites' mounds, hydrophobic lotus-leaf coatings, and iridescent or adhesive surfaces respectively inspired by butterflies and geckos) and self-healing is not an exception. [13-15] In fact, in nature many organisms are capable of healing damages and of restoring their functionalities: skin, bones, plants, and other living systems can sense any failure and reconstruct the injured biological part which recovers its original functionalities. [16-18] Since these features lengthen the life of natural living beings, analog mechanisms can be exploited in artificial self-healing materials to benefit the Major improvements in stability and performance of batteries are still required for a more effective diffusion in industrial key sectors such as automotive and foldable electronics. An encouraging route resides in the implementation into energy storage devices of self-healing features, which can effectively oppose the deterioration upon cycling that is typical of these devices. In order to provide a comprehensive view of the topic, this Review first summarizes the main self-healing processes that have emerged in the multifaceted field of smart materials, classifying them on the basis of t...

show abstract

“…Recently, with the increasingly prominent environmental issues and the growing requirement of advanced polymers, elastomer materials with the capability to reprocess and self-heal have received more and more attention from scientists. The self-healing ability can enhance the reliability and safety of the related devices. − Intensive efforts have been devoted to incorporate reversible cross-links into polymer networks, typically, reversible bonds based on the Diels–Alder (DA) reaction. − However, the reversal DA reaction generated a transient decrease in network connectivity, resulting in a gel-to-sol transition upon heating, which is undesirable for structural applications . Except for reversible covalent bonds, various noncovalent bonds such as hydrogen bonds, − metal–ligand coordination, − host–guest interactions, , π–π stacking, , and hydrophobic associations , were also investigated to construct reversible networks.…”

Section: Introductionmentioning

confidence: 99%

Construction of a Dual Ionic Network in Natural Rubber with High Self-Healing Efficiency through Anionic Mechanism

Liu

Xiao

Tang

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Even though considerable efforts have been applied toward self-healing materials, construction of a reversible network in a nonpolar elastomer with a high strength and self-healing behavior is still a considerable challenge. Herein, a novel method to construct a dual ionic network for natural rubber (NR)-based carboxylate ionomers with a high self-healing efficiency through an anionic mechanism is demonstrated. Maleic anhydride (MAH) was grafted with NR by an anionic mechanism to construct the first ionic network, with n-butyllithium as the metallization reagent. Subsequently, zinc dimethacrylate (ZDMA) reacted with the MAH-modified NR, and the second ionic network was constructed. Additionally, scanning electron microscopy analyses showed that the grafting of MAH improved the dispersity of ZDMA in NR, resulting in a stronger reinforcing effect. Compared to the reported ZDMA-based self-healing elastomers, the dual ionic network exhibited a better reinforcing effect with a high self-healing efficiency of 75% in full-cut mode. This concept offers a novel inspiration to design high-performance self-healing elastomers.

show abstract

The self‐healing cross‐linked polyurethane by Diels–Alder polymerization

Cited by 31 publications

References 38 publications

Self‐Healing Polyurethane Elastomer Based on Crosslinked‐Linear Interpenetrating Structure: Preparation, Properties, and Applications

Self‐Healing Polyurethane Elastomer Based on Crosslinked‐Linear Interpenetrating Structure: Preparation, Properties, and Applications

Exploiting Self‐Healing in Lithium Batteries: Strategies for Next‐Generation Energy Storage Devices

Construction of a Dual Ionic Network in Natural Rubber with High Self-Healing Efficiency through Anionic Mechanism

Contact Info

Product

Resources

About