Recent progress in self-healing polymers and hydrogels based on reversible dynamic B–O bonds: boronic/boronate esters, borax, and benzoxaborole

Journal of Materials Chemistry A, Год журнала: 2021, Номер 9(26), С. 14630 - 14655

Опубликована: Янв. 1, 2021

Reversible boronic ester-based polymers/hydrogels achieve cutting-edge biomedical applications including drug delivery, adhesion, bioimplants, healthcare monitoring by self-healing, injectability, biocompatibility, multi-responsiveness to stimuli.

Язык: Английский

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Intrinsically Self-Healing Polymers: From Mechanistic Insight to Current Challenges

Chemical Reviews, Год журнала: 2022, Номер 123(2), С. 701 - 735

Опубликована: Дек. 28, 2022

Self-healing materials open new prospects for more sustainable technologies with improved material performance and devices' longevity. We present an overview of the recent developments in field intrinsically self-healing polymers, broad class based mostly on polymers dynamic covalent noncovalent bonds. describe current models mechanisms discuss several examples systems different types bonds, from various hydrogen bonds to The advances indicate that most intriguing results are obtained have combined These demonstrate high toughness along a relatively fast rate. There is clear trade-off relationship between rate mechanical modulus materials, we propose design principles toward surpassing this trade-off. also applications summarize challenges field. This review intends provide guidance intrinsic required properties.

Язык: Английский

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A self-reinforcing and self-healing elastomer with high strength, unprecedented toughness and room-temperature reparability

Materials Horizons, Год журнала: 2020, Номер 8(1), С. 267 - 275

Опубликована: Ноя. 2, 2020

The development of intrinsic self-healing elastomers with simultaneous high mechanical strength, toughness and room-temperature reparability remains a formidable challenge. Herein, we report mechano-responsive strategy, known as strain induced crystallization, to address the above issue, whereby synthesized unprecedented performances are bestowed materials, achieving tensile fracture energy values 29.0 MPa, 121.8 MJ m-3 104.1 kJ m-2, respectively.

Язык: Английский

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Disulfide-Mediated Reversible Polymerization toward Intrinsically Dynamic Smart Materials

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(5), С. 2022 - 2033

Опубликована: Янв. 6, 2022

The development of a dynamic chemistry toolbox to endow materials behavior has been key the rational design future smart materials. rise supramolecular and covalent offers many approaches construction polymers that can adapt, respond, repair, recycle. Within this toolbox, building blocks based on 1,2-dithiolanes have become an important scaffold, featuring their reversible polymerization mediated by disulfide bonds, which enables unique class at intersection adaptable networks. This Perspective aims explore as versatile structural unit for summarizing state art well providing overview fundamental challenges involved in research area its potential directions.

Язык: Английский

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Mechanochromic, Shape‐Programmable and Self‐Healable Cholesteric Liquid Crystal Elastomers Enabled by Dynamic Covalent Boronic Ester Bonds

Angewandte Chemie International Edition, Год журнала: 2021, Номер 61(9)

Опубликована: Дек. 28, 2021

Endowing a cholesteric liquid crystal elastomer (CLCE) exhibiting helicoidal nanostructure with dynamically tailorable functionalities is of paramount significance for its emerging applications in diverse fields such as adaptive optics and soft robotics. Here, mechanochromic, shape-programmable self-healable CLCE judiciously designed synthesized through integrating dynamic covalent boronic ester bonds into the main-chain polymer network. The circularly polarized reflection CLCEs can be reversibly tuned across entire visible spectrum by mechanical stretching. Thanks to introduction bonds, were found show robust reprogrammable self-healing capabilities. research disclosed herein provide new insights development 4D (color 3D shape) programmable photonic actuators towards bioinspired camouflage, optical systems, next-generation intelligent machines.

Язык: Английский

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Synergy between dynamic covalent boronic ester and boron–nitrogen coordination: strategy for self-healing polyurethane elastomers at room temperature with unprecedented mechanical properties

Materials Horizons, Год журнала: 2020, Номер 8(1), С. 216 - 223

Опубликована: Ноя. 5, 2020

Achieving mechanical robustness and highly efficient self-healing simultaneously at room temperature is always a formidable challenge for polymeric materials. Herein, series of novel supramolecular polyurethane elastomers (SPUEs) are developed by incorporating dynamic covalent boronic ester boron-nitrogen (B-N) coordination. The SPUEs demonstrate the highest tensile toughness (∼182.2 MJ m-3) to date room-temperature self-healable polymers, as well an excellent ultimate strength (∼10.5 MPa) ultra-high fracture energy (∼72 100 J m-2), respectively, owing synergetic quadruple mechanism. It revealed that B-N coordination not only facilitates formation dissociation but also dramatically enhances properties intermolecular coordinated chain crosslinking intramolecular folding. Meanwhile, urethane hydrogen interaction serve sacrificial bonds, which rupture during stretching dissipate recover after release, leading superior notch insensitiveness recoverability. restore their efficiency can be accelerated surface wetting.

Язык: Английский

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Healable and self-healing polyurethanes using dynamic chemistry

Progress in Polymer Science, Год журнала: 2021, Номер 114, С. 101362 - 101362

Опубликована: Янв. 18, 2021

Язык: Английский

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Ultra-thin self-healing vitrimer coatings for durable hydrophobicity

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Сен. 1, 2021

Abstract Durable hydrophobic materials have attracted considerable interest in the last century. Currently, most popular strategy to achieve coating durability is through combination of a perfluoro-compound with mechanically robust matrix form composite for protection. The structure typically large (thicker than 10 μm), difficult scale arbitrary materials, and incompatible applications requiring nanoscale thickness such as heat transfer, water harvesting, desalination. Here, we demonstrate durable hydrophobicity superhydrophobicity nanoscale-thick, perfluorinated compound-free polydimethylsiloxane vitrimers that are self-healing due exchange network strands. vitrimer thin film maintains excellent optical transparency after scratching, cutting, indenting. We show can be deposited scalable dip-coating on variety substrates. In contrast previous work achieving thick coatings by passively stacking protective structures, this presents pathway ultra-thin (thinner 100 nm) films.

Язык: Английский

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Engineering Hydrogel Adhesion for Biomedical Applications via Chemical Design of the Junction

ACS Biomaterials Science & Engineering, Год журнала: 2021, Номер 7(9), С. 4048 - 4076

Опубликована: Апрель 1, 2021

Hydrogel adhesion inherently relies on engineering the contact surface at soft and hydrated interfaces. Upon contact, normally occurs through formation of chemical or physical interactions between disparate surfaces. The ability to form these junctions is challenging for hydrogels as interfaces are wet deformable often contain low densities functional groups. In this Review, we link design binding chemistries junctions, whether covalent, dynamic supramolecular, physical, emergent adhesive properties Wet useful bonding tissues implants a range biomedical applications. We highlight several recent emerging use in biomedicine context efficient junction design. main focus hydrogel molecular tailor strength, reversibility, stability, response environmental stimuli.

Язык: Английский

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Remalleable, Healable, and Highly Sustainable Supramolecular Polymeric Materials Combining Superhigh Strength and Ultrahigh Toughness

ACS Applied Materials & Interfaces, Год журнала: 2020, Номер 12(27), С. 30805 - 30814

Опубликована: Июнь 11, 2020

To build a sustainable society, it is of significant importance but highly challenging to develop remalleable, healable, and biodegradable polymeric materials with integrated high strength toughness. Here, we report superstrong ultratough supramolecular material toughness ca. 282.3 J g-1 (395.2 MJ m-3) in combination tensile as 104.2 MPa Young's modulus 3.53 GPa. The even higher than that the toughest spider silk (ca. 354 ever found world, while also exhibits superior over most engineering plastics. This fabricated by topological confinement linear polymer poly(vinyl alcohol) (PVA) via naturally occurring dendritic molecules tannic acid (TA) based on high-density hydrogen bonds. Simply blending TA PVA aqueous solutions at acidic conditions leads formation TA-PVA complexes precipitates, which can be processed into dry composite products desired shapes compression molding method. Compared conventional solution casting method for fabrication PVA-based thin films, as-developed strategy allows large-scale production bulk composites. composites consist interpenetrating three-dimensional clusters. Such structural feature, revealed computational simulations, crucial superhigh ultrahigh material. are remalleable multiple generations recycling healable after break, room temperature, assistance water activate reversibility show promise substitutes plastics because their remalleability, healability, biodegradability. ensure reliability broad applicability.

Язык: Английский

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