A novel type of self-healing silicone elastomers with reversible cross-linked network based on the disulfide, hydrogen and metal-ligand bonds

Yuan, Junguo; Zhang, Kaiming; Guo, Keyu; Lin, Yuan; Wu, Yumin; Gao, Chuanhui

doi:10.1016/j.porgcoat.2020.105661

Cited by 40 publications

(21 citation statements)

References 24 publications

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“…Moreover, our disulfide network was stable under ambient conditions without any further treatment. Previous studies have noted poor stability for polydisulfides unless the propagating thiolate species is protonated 33 , quenched with an electrophile 31 or the thiyl radical chain-end is reacted with a capping agent 41,[46][47][48] to form a new S-C bond. However, in our system we only employ 1 mol% base (relative to the disulfide) so not all crosslink sites could be expected to be in their ringopened thiolate form which may explain the observed behaviour here.…”

Section: Resultsmentioning

confidence: 99%

“…ROP) and then crosslinking the material via metal coordination/complexation of the carboxylate moiety. [40][41][42][43][44][45][46] Other studies have also modified the carboxylic acid of lipoic acid with dopamine 47 or N-hydroxy succinimide 48 to produce self-healing supramolecular adhesives. Additionally, dynamic cyclic disulfides have also featured in degradable nanoparticles 49,50 and adaptable hydrogels [51][52][53][54] , although in the gel examples the disulfide features as a reactive polymer a.…”

Section: Introductionmentioning

confidence: 99%

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Renewable and recyclable covalent adaptable networks based on bio-derived lipoic acid

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Renewable and recyclable covalent adaptable networks based on bio-derived lipoic acid

et al. 2021

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“…3D, the scratched hydrogel was autonomously healed after 10 min at room temperature, which was related to the dynamic reconstruction of disulfide bonds and multiple hydrogen bonds between GM and PTA. 33,34 To display the adhesion properties of the G-PTA hydrogel, tests were carried out for adhesion to skin and other substrates. As illustrated in Fig.…”

Section: Mechanical and Self-healing Properties Of The G-pta Hydrogelmentioning

confidence: 99%

A gentamicin-thioctic acid multifunctional hydrogel for accelerating infected wound healing

et al. 2022

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“…By contrast, the self‐healing materials with intrinsic mechanism can repair themselves many times, being similar to the self‐healing process of biological organs [12–14] . Chemical inherent self‐healing mechanism depends on reversible dynamic covalent bonds containing dynamic urea bond, [15] acylhydrazone bond, [16] reversible disulfide [17–19] and boron ester bond, [20] as well as noncovalent bonds like metal‐ligand coordination, [17,21–23] hydrogen bond, [24–31] ionic bond, [32] subject‐object interaction [33] and so on [34–38] …”

Section: Introductionmentioning

confidence: 99%

Metal‐Free Catalyst, Fast Curing, Stretchable, Self‐Healing Siloxane Modified Polyurea Elastomer with Tunable Properties Based on Hydrogen Bonds

Huang

et al. 2022

ChemistrySelect

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In the past decade, self-healing polymer materials, being researched and utilized in many fields, have attracted more and more attention. In this work, self-healing siloxane elastomer (SPUR) with flexible cross-linked networks were designed through the reaction of amino-functionalized polyether, isocyanate and α-siloxane, which endowed elastomer with intermolecular hydrogen bond. Herein, these hydrogen bonds can break and reorganize via a simple thermal treatment to gain self-healing and post-processing actions. The self-healing performance of the elastomer is confirmed through tensile test and SEM surface analysis. Consistent with our experiments, the researches show that siloxane modified polyurea elastomers (SPUR) congaing higher content of amino-functionalized polyether with 2000 molecular weights (PEA20) show much better flexibility and healing efficiency. Also, the polyurea can be quickly cured without any metal catalyst due to the presence of α-siloxane, which is a highlight of this article, and it is better than the related literature reported so far. Through tensile test and healing performance test, SPUR1 possessing the both remarkable strength and elasticity was obtained (elongation at break 530 %, tensile stress 5.26 MPa). In addition, it has relatively satisfied healing efficiency 30 % and excellent thermal stability. In view of such intermolecular hydrogen bond, we have developed a special self-healing polymer material with tunable performance by varying the monomer ratio between amino-functionalized polyether PEA9 (the molecular weight Mn = 900 Da) and PEA20 (Mn = 2000 Da). A variety of selfhealing polymer materials can be lightly synthesized on account of the wide extent of commercial activities of raw materials such as primary amine, silane and isocyanate. Therefore, self-healable polymer elastomers are exceptionally popular in a rank of fields, such as coatings, construction, aerospace, flexible electronics, automobile, medical device and lithium-ion batteries.

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A novel type of self-healing silicone elastomers with reversible cross-linked network based on the disulfide, hydrogen and metal-ligand bonds

Cited by 40 publications

References 24 publications

Renewable and recyclable covalent adaptable networks based on bio-derived lipoic acid

Renewable and recyclable covalent adaptable networks based on bio-derived lipoic acid

A gentamicin-thioctic acid multifunctional hydrogel for accelerating infected wound healing

Metal‐Free Catalyst, Fast Curing, Stretchable, Self‐Healing Siloxane Modified Polyurea Elastomer with Tunable Properties Based on Hydrogen Bonds

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