Correction: Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

An, Ze-Wei; Xue, Rui; Kang, Yong; Zhao, Huiren; Liu, Yang; Chen, Zhenming; Huang, Chongxing; Hu, Guohua

doi:10.1039/d3nr90073h

Cited by 5 publications

(1 citation statement)

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“…To address this challenge, an effective strategy involves a complementary approach that combines a rigid, contorted skeleton with flexible chain segments. This approach has proven to be instrumental in overcoming the structural collapse associated with highly flexible frameworks [ 27 , 28 , 29 ]. Previous reports from our group highlighted the successful synthesis of diverse hypercrosslinked polymers (HCPs) based on triptycene and its derivatives as monomers, characterized by their three-dimensional rigid paddle wheel shape.…”

Section: Introductionmentioning

confidence: 99%

Rigidity with Flexibility: Porous Triptycene Networks for Enhancing Methane Storage

Guo,

Ma,

Yang

et al. 2024

Polymers

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In the pursuit of advancing materials for methane storage, a critical consideration arises given the prominence of natural gas (NG) as a clean transportation fuel, which holds substantial potential for alleviating the strain on both energy resources and the environment in the forthcoming decade. In this context, a novel approach is undertaken, employing the rigid triptycene as a foundational building block. This strategy is coupled with the incorporation of dichloromethane and 1,3-dichloropropane, serving as rigid and flexible linkers, respectively. This combination not only enables cost-effective fabrication but also expedites the creation of two distinct triptycene-based hypercrosslinked polymers (HCPs), identified as PTN-70 and PTN-71. Surprisingly, despite PTN-71 manifesting an inferior Brunauer–Emmett–Teller (BET) surface area when compared to the rigidly linked PTN-70, it showcases remarkably enhanced methane adsorption capabilities, particularly under high-pressure conditions. At a temperature of 275 K and a pressure of 95 bars, PTN-71 demonstrates an impressive methane adsorption capacity of 329 cm3 g−1. This exceptional performance is attributed to the unique flexible network structure of PTN-71, which exhibits a pronounced swelling response when subjected to elevated pressure conditions, thus elucidating its superior methane adsorption characteristics. The development of these advanced materials not only signifies a significant stride in the realm of methane storage but also underscores the importance of tailoring the structural attributes of hypercrosslinked polymers for optimized gas adsorption performance.

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Section: Introductionmentioning

confidence: 99%

Rigidity with Flexibility: Porous Triptycene Networks for Enhancing Methane Storage

Guo,

Ma,

Yang

et al. 2024

Polymers

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Synthesis of Diels–Alder bond and hydrogen bond synergistic shape memory self‐healing polyurethane elastomers

Zhang,

Wang,

Cao

et al. 2023

J of Applied Polymer Sci

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Self‐healing materials exhibit the ability to repair damage and restore their function. Shape memory assisted self‐healing (SMASH) materials are smart materials that automatically close localized microscopic cracks and repair these cracks by bonding damaged surfaces. A novel temperature‐responsive SMASH polymer composite was established by introducing Diels–Alder bonds (D–A) in polyurethane. In this article, dynamic D–A produced by the polymerization of furfurylamine and 4,4’‐bismaleimidodiphenylmethane was introduced into the molecular chain to enable the polyurethane elastomers containing D–A bonds to acquire self‐repairing capability. The self‐healing properties of the synthesized material were examined using polarized light microscopy, which revealed excellent fracture healing. The mechanical properties before and after healing were tested, in which the initial maximum tensile strength of the material could reach 7.9 MPa, and the maximum tensile strength after self‐healing was 7.3 MPa, with a repair rate of 91.8%; the maximum elongation was 585.9%, and the maximum elongation after self‐healing was 469.5%, with a repair rate of 80.1%. In addition, this material has excellent repair performance for microcracks of different scales, and the micromolten part of the surface after heating can fill the micrometer cracks, play the role of antiaging, and extend the service life of the material.

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Coordinate mechanical property and self‐healing performance by hydrogen bonding promoting microphase separation structures in waterborne polyurethanes

Li,

Niu,

et al. 2024

J of Applied Polymer Sci

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Self‐repairing materials aim to replicate nature's repair mechanisms, but their current properties are inadequate for commercialization due to the trade‐off between repair and mechanical properties. An environmentally responsive low‐temperature self‐healing aqueous polyurethane with different sequence structures was developed in which the WPU‐MD/APDS system exhibited excellent performance. Statically, the incorporation of MD (1,8‐diamino‐P‐menthane) enhances hydrogen bonding within the system and facilitates reversible weak dynamic bonding; microphase separation enables aggregation of disulfide bonds in the hard‐phase domain, thereby improving disulfide bond exchange rates. Dynamically, the inclusion of MD introduces a rigid ring structure and promotes microphase separation with increased hydrogen bonding, leading to enhanced mechanical properties of the materials. The material exhibited tensile strength of 27.37 MPa, elongation at break of 1353%, excellent elastic recovery ability, and high tensile toughness of 136 MJ m−3; a sample with thickness of 0.2 mm lifted weight greater than its own weight into 40,000 times without damage recovery at 40°C. Rheological analysis confirmed its self‐healing property at room temperature.

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Correction: Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Abstract: Correction for ‘Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods’ by Ze-Wei An et al., Nanoscale, 2023, 15, 6505–6520, https://doi.org/10.1039/D2NR07110J.

Cited by 5 publications

References 0 publications

Rigidity with Flexibility: Porous Triptycene Networks for Enhancing Methane Storage

Rigidity with Flexibility: Porous Triptycene Networks for Enhancing Methane Storage

Synthesis of Diels–Alder bond and hydrogen bond synergistic shape memory self‐healing polyurethane elastomers

Coordinate mechanical property and self‐healing performance by hydrogen bonding promoting microphase separation structures in waterborne polyurethanes

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