A molecular dynamics simulation on self-healing behavior based on disulfide bond exchange reactions

Zheng, Xiangrui; Yang, Hua; Sun, Yang; Zhang, Yongqin; Guo, Ya-Fang

doi:10.1016/j.polymer.2020.123111

Cited by 40 publications

(35 citation statements)

References 46 publications

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“…The whole self‐healing mechanism was presented in Figure 1, when the crack occurred and then subjected a gentle pressure to bring the fracture contacted together. Through the thermal stimulation, these bonds would reformate new SS bonds through disulfide interchange 28–30 …”

Section: Resultsmentioning

confidence: 99%

Effect of mechanical properties on the self‐healing behavior of waterborne polyurethane coatings

Zhang

Fan

et al. 2022

J of Applied Polymer Sci

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The effect of structural parameters such as hard segment content and cross-linking degree on the mechanical properties of waterborne self-healing polyurethane and the effect of tensile strength, self-healing conditions (temperature, time) on the selfhealing properties were investigated. These results demonstrated that as the increasing of the content of hard segments/the cross-linking agent, the tensile strength of the sample increased and the self-healing performance exhibited a downward trend. When the tensile strength reached 40 MPa, it could hardly healed, even if prolonging the self-healing time or increasing the self-healing temperature. Mechanism study demonstrated that the self-healing ability was attributed to the dynamic exchange of disulfide bonds and the thermal reversibility of hydrogen bonds in the system. Hydrogen bonding could provide the initial selfhealing force and promote the dynamic exchange reaction of disulfide bonds, while high hydrogen bonding is not conducive to the movement of macromolecular segments, causing a decrease in the self-healing efficiency.

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Section: Resultsmentioning

confidence: 99%

Effect of mechanical properties on the self‐healing behavior of waterborne polyurethane coatings

Zhang

Fan

et al. 2022

J of Applied Polymer Sci

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“…In research work, we classify the concept of self-healing, which is based on the use of disulfide bonds between rubber networks that can fully recover their mechanical properties at moderate temperatures, the key to which is the exchange of disulfide bonds. [38,39] Based on the characteristics of reversible repair and mild repair condition of disulfide bond, introducing reversible disulfide bonds with elastomers to prepare self-healing materials are widely used. Nevertheless, there are few studies on the self-healing properties of materials based on disulfide bond exchange reaction, especially on the self-healing kinetics of coatings under Ultra Violet (UV) light [40,41] and heating conditions.…”

Section: Classification and Properties 21 Self-healing Mechanism Based On Reversible Disulfide Bondsmentioning

confidence: 99%

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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“…Li et al fabricated a type of poly(urea-urethane)-type ionogel with good healability based on reversible hindered urea bonds in the polyurethane network and the ionogel could be nely healed at 65 C for 3 h. 13 Due to the high healing efficiency and mild healing condition, dynamic disulde bonds have attracted much attention in the eld of self-healing materials. [40][41][42] In our previous work, a type of polyurethane elastomer with disulde bonds was synthesized and the healing efficiency was up to 95% aer healing for 12 h at 80 C. 40 Therefore, due to the poor mobility of chains in the chemically crosslinked polymer network, it is difficult to prepare ionogels with high elasticity that simultaneously can be healed at low temperature.…”

Section: Introductionmentioning

confidence: 99%

Self-healing, mechanically robust, 3D printable ionogel for highly sensitive and long-term reliable ionotronics

Zhang

Tao

et al. 2022

J. Mater. Chem. A

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A molecular dynamics simulation on self-healing behavior based on disulfide bond exchange reactions

Cited by 40 publications

References 46 publications

Effect of mechanical properties on the self‐healing behavior of waterborne polyurethane coatings

Effect of mechanical properties on the self‐healing behavior of waterborne polyurethane coatings

Self-healing Materials: A Review of Recent Developments

Self-healing, mechanically robust, 3D printable ionogel for highly sensitive and long-term reliable ionotronics

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