2021
DOI: 10.1016/j.jcis.2021.03.003
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Mussel-inspired and aromatic disulfide-mediated polyurea-urethane with rapid self-healing performance and water-resistance

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Cited by 39 publications
(30 citation statements)
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“…As shown in Figure f, highly linear fittings of ln­(τ) and 1000/ T are reached, and E a values of ESO 6 -SS x -DAA y were calculated from the slopes to be around 49.5 and 104.4 kJ/mol. These results are slightly higher than the stress relaxation time activation reported in the previous lecture (20–40 kJ/mol) . The E a values decrease with the increase of [DAA]/[DTSA] ratios, which may be attributed to the reduced contents of dynamic aromatic disulfide bonds and plasticizing effect by DAA collectively, improving the mobility of the molecular chains.…”
Section: Resultssupporting
confidence: 75%
See 1 more Smart Citation
“…As shown in Figure f, highly linear fittings of ln­(τ) and 1000/ T are reached, and E a values of ESO 6 -SS x -DAA y were calculated from the slopes to be around 49.5 and 104.4 kJ/mol. These results are slightly higher than the stress relaxation time activation reported in the previous lecture (20–40 kJ/mol) . The E a values decrease with the increase of [DAA]/[DTSA] ratios, which may be attributed to the reduced contents of dynamic aromatic disulfide bonds and plasticizing effect by DAA collectively, improving the mobility of the molecular chains.…”
Section: Resultssupporting
confidence: 75%
“…These results are slightly higher than the stress relaxation time activation reported in the previous lecture (20−40 kJ/mol). 56 The E a values decrease with the increase of [DAA]/[DTSA] ratios, which may be attributed to the reduced contents of dynamic aromatic disulfide bonds and plasticizing effect by DAA collectively, improving the mobility of the molecular chains.…”
Section: Resultsmentioning
confidence: 99%
“…In contrast, polyurea networks based on dynamic covalent bonds (e.g., hindered urea bonds, Diels‐Alder reaction and disulfide exchange), could offer enhanced and stabler mechanical properties over a wider temperature range since the higher stability of the reversible bond moiety. For instance, Zhang et al designed a new polyurea elastomer with aromatic disulfide, which showed a remarkable self‐healing ability of 98.4% at room temperature for only 6 h without any catalyst or external stimulus 5 . This elastomer, however, has limited engineering applications due to its poor mechanical strength which is less than 1 MPa.…”
Section: Introductionmentioning
confidence: 99%
“…Natural evolution has produced many amazing geometric structures, resulting in certain natural materials, such as spider silk and mussel, which can strike a good balance between strength, toughness and self‐healing properties. The common denominator is that they both have a two‐phase structure where the nanoscale hard domains are homogeneously embedded in the amorphous matrix, similar to the microphase separation of soft and hard chain segments in polyurea 5,7,8 . We thus believe that through proper molecular design and precise control of the microphase separation structure, it is promising to integrate seemingly contradictory properties into one polyurea system.…”
Section: Introductionmentioning
confidence: 99%
“…[1], owing to its excellent properties. Given it outstanding properties like excellent elasticity, relatively low glass transition temperature(Tg), and low viscosity [2], hydroxyl-terminated polybutadiene (HTPB)-based PU has become more and more popular as promising material for many devices [3]. Nevertheless, PU usually suffer from various environmental influences during its service life, resulting in the generation of cracks and defects.…”
Section: Introductionmentioning
confidence: 99%