Polyurethane networks based on disulfide bonds: from tunable multi-shape memory effects to simultaneous self-healing

Deng, Xiaoying; Xie, Hui; Du, Lan; Fan, Cheng-Jie; Cheng, Chuan-Ying; Yang, Ke‐Ke; Wang, Yu‐Zhong

doi:10.1007/s40843-018-9318-7

Cited by 74 publications

(39 citation statements)

References 48 publications

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“…In order to prove the existence of disulfide bond in synthesized poly(urea‐urethane)s, Raman spectra were tested and shown in Figure b. The v(SS) band at 512 cm −1 and v(CS) band at 664 cm −1 similar to corresponding bands in cystine and CDED were observed, indicating the existence of disulfide bonds in synthesized poly(urea‐urethane)s …”

Section: Resultsmentioning

confidence: 99%

A Robust and High Self‐Healing Efficiency Poly(Urea‐Urethane) Based on Disulfide Bonds with Cost‐Effective Strategy

Wang

Bai

et al. 2019

Macro Chemistry & Physics

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The development of self‐healing poly(urea‐urethane)s with remarkable mechanical properties as well as self‐healing capability is an important challenge through a low‐cost approach. In this study, cystine dimethyl ester (CDE) is synthesized cost‐effectively using cystine from bio‐based sources as raw material, and a novel self‐healing poly(urea‐urethane) is successfully prepared using synthesized CDE as a disulfide‐containing chain extender through a two‐step approach. The as‐prepared disulfide‐containing poly(urea‐urethane) (SPU) presents an excellent self‐healing capability with self‐healing efficiency of 95.3% at a moderate healing temperature (≈60 °C). Meanwhile, the SPU exhibits robust mechanical properties possessing a maximum tensile strength of 25.80 MPa and a high elongation at break of over 460% simultaneously. The compromise between self‐healing capability and mechanical performance can be responsible for the exchange of dynamic disulfide bonds and the existence of quadruple hydrogen bonding. This strategy provides an available idea to develop robust self‐healing polymer materials cost‐effectively.

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Section: Resultsmentioning

confidence: 99%

A Robust and High Self‐Healing Efficiency Poly(Urea‐Urethane) Based on Disulfide Bonds with Cost‐Effective Strategy

Wang

Bai

et al. 2019

Macro Chemistry & Physics

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“…They concluded that the synergistic photo-thermal response and dynamic exchangeable diselenide bond contributed towards the curing of damaged sites resulting in complete healing. Similarly, Deng and colleague [69] have used the same PTMEG based polyurethane embedded with dynamic covalent bonds using disulfide bond in its backbone chain which are responsible for its conditional self-healing ability. Increasing the content of disulfide bond (12%) showed efficient self-healing efficiency (94%).…”

Section: Self-healingmentioning

confidence: 99%

Shape Memory Polyurethane and its Composites for Various Applications

2019

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The inherent capability to deform and reform in a predefined environment is a unique property existing in shape memory polyurethane. The intrinsic shape memory ability of the polyurethane is due to the presence of macro domains of soft and hard segments in its bulk, which make this material a potential candidate for several applications. This review is focused on manifesting the applicability of shape memory polyurethane and its composites/blends in various domains, especially to human health such as shielding of electromagnetic interference, medical bandage development, bone tissue engineering, self-healing, implants development, etc. A coherent literature review highlighting the prospects of shape memory polyurethane in versatile applications has been presented.

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“…As is commonly known, polyurethanes (PUs) are a typical class of polymers with hard/soft two-phase morphology. PUs show great diversity in terms of both performance and morphology because they can be synthesized from various diols or polyols as well as isocyanate [42][43][44][45]. Moreover, PU architecture can be simply tuned by selecting suitable chain extenders and end-groups [46].…”

Section: Introductionmentioning

confidence: 99%

A robust self-healing polyurethane elastomer: From H-bonds and stacking interactions to well-defined microphase morphology

Fan

Huang

et al. 2019

Sci. China Mater.

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Self-healing materials have attracted considerable attention because of their improved safety, lifetime, energy efficiency and environmental impact. Supramolecular interactions have been extensively considered in the field of self-healing materials due to their excellent reversibility and sensitive responsiveness to environmental stimuli. However, development of a polymeric material with good mechanical performance as well as self-healing capacity is very challenging. In this study, we report a robust self-healing polyurethane (PU) elastomer polypropylene glycol-2-amino-5-(2hydroxyethyl)-6-methylpyrimidin-4-ol (PPG-mUPy) by integrating ureidopyrimidone (UPy) motifs with a PPG segment with a well-defined architecture and microphase morphology. To balance the self-healing capacity and mechanical performance, a thermal-triggered switch of H-bonding is introduced. The quadruple H-bonded UPy dimeric moieties in the backbone induce phase separation to form a hard domain as well as enable further aggregation into microcrystals by virtue of the stacking interactions, which are stable in ambient temperature. This feature endows the PU with high mechanical strength. Meanwhile, a high healing efficiency can be realized, when the reversibility of the H-bond was unlocked from the stacking at higher temperature. An optimized sample PPG 1000-mUPy 50% with a good balance of mechanical performance (20.62 MPa of tensile strength) and healing efficiency (93% in tensile strength) was achieved. This strategy will provide a new idea for developing robust self-healing polymers.

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Polyurethane networks based on disulfide bonds: from tunable multi-shape memory effects to simultaneous self-healing

Cited by 74 publications

References 48 publications

A Robust and High Self‐Healing Efficiency Poly(Urea‐Urethane) Based on Disulfide Bonds with Cost‐Effective Strategy

A Robust and High Self‐Healing Efficiency Poly(Urea‐Urethane) Based on Disulfide Bonds with Cost‐Effective Strategy

Shape Memory Polyurethane and its Composites for Various Applications

A robust self-healing polyurethane elastomer: From H-bonds and stacking interactions to well-defined microphase morphology

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