Room-Temperature Self-Healing Ablative Composites via Dynamic Covalent Bonds for High-Performance Applications

Cai, Yuanbo; Zou, Huawei; Zhou, Shengtai; Yang, Chen; Liang, Mei

doi:10.1021/acsapm.0c00638

Cited by 60 publications

(42 citation statements)

References 43 publications

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“…Some new properties of the material further widen the application field of the material, nevertheless, there are still some problems with self-healing materials. [122][123][124] 1. The raw material cost of the self-healing material is exorbitant, and the synthesis step and the reaction conditions request are relatively high.…”

Section: Discussionmentioning

confidence: 99%

“…Self-healing materials are widely used in military equipment, electronic products, [14][15][16][17][18][19] automobiles, airplanes, [20][21][22] building materials, [23] biological materials, [24] medical materials [25][26][27][28][29] and biomimetic technology, [30,31] The proportion of application is also increasing with each passing year (Figs. 1 a, b and c), for instance, self-healing materials can be used in dentistry in medical field.…”

Section: Introductionmentioning

confidence: 99%

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Self-healing Materials: A Review of Recent Developments

Song¹,

Jiang²,

Li³

et al. 2021

ES Mater. Manuf.

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Self-healing polymer is a kind of functional polymer materials that can repair scratches, cracks and other mechanical damage, whose unique self-healing ability is of great significance for prolonging the life of materials. Eigen self-healing polymers have become the focus of current research due to their advantages of mild healing conditions and repeatable healing. In this paper, the preparation technology and properties of self-healing elastomers were reviewed, which provided guidance for the preparation of polymers with high repair efficiency and pointed out its future development trend. The self-healing polymer materials based on Diels-Alder reaction, metal bond, hydrogen bond, ionic bond, disulfide bond, etc., are mainly introduced, and their preparation process, healing mechanism and healing properties are reviewed. Although much progress has been made in self-healing elastomers based on different dynamic bonds, the development of materials with high repair efficiency remains a huge challenge. In this paper, various repair pathways of self-healing elastomers were reviewed, which provided guidance for the balance between repair and mechanical properties. The development of inherently self-healing polymers was also prospected.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Self-healing Materials: A Review of Recent Developments

Song¹,

Jiang²,

Li³

et al. 2021

ES Mater. Manuf.

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“…[87] Liang et al synthesized a polyurethane elastomer through this chain extender, whose room temperature self-healing efficiency could reach 92.9% within 3 h. Based on this, a polymer thermal protection composite material that self-healed within 24 h at room temperature was prepared. [88] When diamine (diaminodiphenyl disulfide) was used to replace diol, urea bonds were introduced into the polyurethane. [89,90] As mentioned earlier, an increasing amount of aromatic disulfide did not necessarily offer higher mobility of the material which is crucial for obtaining self-healing.…”

Section: Disulfide Diselenide and Detelluride Bondsmentioning

confidence: 99%

A Short Review on Self‐Healing Thermoplastic Polyurethanes

Yao

Xiao

Liu

2021

Macro Chemistry & Physics

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of self-healing will happen only by satisfying four factors: location, temporality, mobility, [17] and intermolecular interaction. The surface of the damaged part needs to contact with each other properly and the dynamic interaction requires time to reform. Self-healing TPUs can be used as coatings, [18] adhesives, [19] biomedical materials, [20] wearable electronics, [21] and this self-healing property can extend the service life and reduce waste. Early selfhealing materials were design to employ encapsulated external healing agents. [22] With conceptualization and development, the classification of healing agents comprises three types: microcapsules, [23,24] hollow fibers, [25,26] and microvascular networks. [27] Limited by the supply of healing agents, multiple cycle repairs cannot be achieved; in addition, the microcontainers may be harmful to the regular service of the matrix, which change the inherent properties of the matrix, fail to respond quickly and cause the healing agent to flow out when the matrix is damaged. To overcome these restrictions, research on self-healing polymers has focused on the incorporation of self-healing mechanism directly in the material by introducing dynamic bonds or interactions (covalent or non-covalent) that can break and reform in a perpetual manner upon appropriate stimuli. The dynamic non-covalent interactions like hydrogen bond, [28,29] shape-memory assisted self-healing, [30,31] host-guest interaction, [32,33] and metal-ligand coordination [34,35] primarily influence the self-healing efficiency. The dynamic covalent bonds such as Diels-Alder bonds, [36,37] disulfide bonds, [38,39] diselenide bonds, [40,41] and ditelluride bonds [42] exert a major effect on the mechanical property of self-healing polyurethanes. However, there is a contradiction between self-healing efficiency and mechanical property. It is challenging to obtain a material with both remarkable mechanical strengths and a high self-healing efficiency. Interest in homogeneous self-healing materials has been growing because they do not need to be combined with therapeutic agents, which avoids many thorny issues including complicated pre-embedding processes, compatibility, and controlled and sustained release. For healing agents-assisted self-healing materials, they are usually thermosetting, and an obvious limitation is that they only support one self-healing cycle. [43] Self-healing elastomers can achieve repair through dynamic molecular interactions between the damaged surface. In this article, we only focus on self-healing TPU elastomer mechanism based on dynamic covalent or non-covalent bonds. Self-healing polyurethanes based on external healing agents are outside the scope of this article.Thermoplastic polyurethane (TPU) is a melt-processing polymer with a high elasticity, high tensile strength, low-temperature resistance, wear-resistance, and corrosion resistance ability. TPU can be used in the automotive industry, electronics, medical supplies, coatings, and sports equipment. Introduction of self-healin...

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“…[ 75 ] Other reports describe the use of BAPSS to fabricate disulfide‐based self‐healable PU elastomeric materials. [ 76,77 ]…”

Section: Incororation Of Dynamic Covalent Chemistriesmentioning

confidence: 99%

Dynamic Covalent Polyurethane Network Materials: Synthesis and Self‐Healability

Nellepalli

Patel

2021

Macromol. Rapid Commun.

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Polyurethane (PU) has not only been widely used in the daily lives, but also extensively explored as an important class of the essential polymers for various applications. In recent years, significant efforts have been made on the development of self‐healable PU materials that possess high performance, extended lifetime, great reliability, and recyclability. A promising approach is the incorporation of covalent dynamic bonds into the design of PU covalently crosslinked polymers and thermoplastic elastomers that can dissociate and reform indefinitely in response to external stimuli or autonomously. This review summarizes various strategies to synthesize self‐healable, reprocessable, and recyclable PU materials integrated with dynamic (reversible) Diels–Alder cycloadduct, disulfide, diselenide, imine, boronic ester, and hindered urea bond. Furthermore, various approaches utilizing the combination of dynamic covalent chemistries with nanofiller surface chemistries are described for the fabrication of dynamic heterogeneous PU composites.

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Room-Temperature Self-Healing Ablative Composites via Dynamic Covalent Bonds for High-Performance Applications

Cited by 60 publications

References 43 publications

Self-healing Materials: A Review of Recent Developments

Self-healing Materials: A Review of Recent Developments

A Short Review on Self‐Healing Thermoplastic Polyurethanes

Dynamic Covalent Polyurethane Network Materials: Synthesis and Self‐Healability

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