Extremely Strong and Tough Biodegradable Poly(urethane) Elastomers with Unprecedented Crack Tolerance via Hierarchical Hydrogen‐Bonding Interactions

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(21)

Published: Feb. 23, 2023

The elastomers with the combination of high strength and toughness have always been intensively pursued due to their diverse applications. Biomedical applications frequently require biodegradability biocompatibility properties. It remains a great challenge prepare biodegradable extremely robust mechanical properties for in vivo use. In this report, we present polyurethane elastomer unprecedented application as hernia patches, which was obtained by solvent-free reaction polycaprolactone (PCL) isophorone diisocyanate (IPDI) N,N-bis(2-hydroxyethyl)oxamide (BHO) chain extender. Abundant hierarchical hydrogen-bonding interactions inside hinder crystallization PCL segments facilitate formation uniformly distributed hard phase microdomains, miraculously realize fracture 92.2 MPa true stress 1.9 GPa, while maintaining elongation-at-break ≈1900% ultrahigh 480.2 MJ m-3 energy 322.2 kJ m-2 . Hernia patches made from via 3D printing technology exhibit outstanding properties, biocompatibility, biodegradability. demonstrate considerable potentials

Language: Английский

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Room-temperature self-healing supramolecular polyurethanes based on the synergistic strengthening of biomimetic hierarchical hydrogen-bonding interactions and coordination bonds

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 451, P. 138673 - 138673

Published: Aug. 18, 2022

Language: Английский

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Multiple Structure Reconstruction by Dual Dynamic Crosslinking Strategy Inducing Self‐Reinforcing and Toughening the Polyurethane/Nanocellulose Elastomers

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(12)

Published: Jan. 15, 2023

Abstract High‐performance elastomers are expected to possess excellent healing and recycling ability, damage resistance in conjunction with high strength toughness. Herein, a dual dynamic crosslinking strategy is implemented by multiple hydrogen disulfide bonds obtain novel amorphous transparent polyurethane/nanocellulose elastomer self‐healing, self‐reinforcing toughening performance. First, introduced TEMPO‐oxidized cellulose nanofibers (TCNF) modification 2‐ureido‐4[1H]‐pyrimidone (UTCNF), while (SS) the polyurethane (PU) main chain, leading formation of cross‐linking networks. The PU‐SS‐UTCNF can fully self‐heal within 4.0 h at 50 °C. Surprisingly, for first time, also self‐strengthens self‐toughens after hot‐pressing, tensile toughness that increase up 401% 257% compared original samples, 50.0 MPa 132.5 MJ m ‐3 . self‐strength self‐toughening effects attributed 1) reconstruction networks degree during hot‐pressing processes; 2) system beneficial orientation highly crystallized UTCNF, as replacement stress‐induced process deformation under external force.

Language: Английский

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Rosin acid and SiO2 modified cotton fabric to prepare fluorine-free durable superhydrophobic coating for oil-water separation

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 440, P. 129797 - 129797

Published: Aug. 18, 2022

Language: Английский

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Tough, Photoluminescent, Self-Healing Waterborne Polyurethane Elastomers Resulting from Synergistic Action of Multiple Dynamic Bonds

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(15), P. 19414 - 19426

Published: April 5, 2023

Polymers that integrate multiple functions into one system broaden the application range of materials, but it remains a great challenge to obtain polymer materials with simultaneously high strength, toughness, and self-healing rate. In this work, we prepared waterborne polyurethane (WPU) elastomers using Schiff bases containing disulfide acylhydrazone bonds (PD) as chain extenders. Acylhydrazone forming hydrogen bond not only acts physical cross-linking point, which promotes microphase separation increase thermal stability, tensile toughness elastomer, also serves "clip" various dynamic together synergistically reduce activation energy movement endow molecular faster fluidity. Therefore, WPU-PD exhibits excellent mechanical properties at room temperature, such strength fracture 25.91 MPa 121.66 kJ m-2, respectively, efficiency 93.7% in short time under moderate heating conditions. addition, photoluminescence property enables us track its process by monitoring change fluorescence intensity cracks, helps avoid accumulation cracks improve reliability elastomer. This has potential value optical anticounterfeiting, flexible electronics devices, functional automobile protective films, so on.

Language: Английский

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A stretchable, mechanically robust polymer exhibiting shape-memory-assisted self-healing and clustering-triggered emission

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Aug. 5, 2023

Abstract Self-healing and recyclable polymer materials are being developed through extensive investigations on noncovalent bond interactions. However, they typically exhibit inferior mechanical properties. Therefore, the present study is aimed at synthesizing a polyurethane–urea elastomer with excellent properties shape-memory-assisted self-healing behavior. In particular, introduction of coordination hydrogen bonds into leads to optimal exhibiting good (strength, 76.37 MPa; elongation break, 839.10%; toughness, 308.63 MJ m −3 ) owing phased energy dissipation mechanism involving various supramolecular The also demonstrates shape-memory properties, whereby shape recovery force that brings damaged surfaces closer facilitates self-healing. Surprisingly, all specimens exhibite clustering-triggered emission, cyan fluorescence observed under ultraviolet light. strategy reported herein for developing multifunctional can be leveraged yield stimulus-responsive polymers smart seals.

Language: Английский

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Dual-hard phase structures make mechanically tough and autonomous self-healable polyurethane elastomers

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 454, P. 140268 - 140268

Published: Nov. 11, 2022

Language: Английский

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Self-healing, self-adhesive, and stretchable conductive hydrogel for multifunctional sensor prepared by catechol modified nanocellulose stabilized poly(α-thioctic acid)

Carbohydrate Polymers, Journal Year: 2023, Volume and Issue: 313, P. 120813 - 120813

Published: March 16, 2023

Language: Английский

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Tough, Recyclable, and Degradable Elastomers for Potential Biomedical Applications

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(20)

Published: March 16, 2023

Elastomers have many industrial, medical and commercial applications, however, their huge demand raises an important question of how to dispose the out-of-service elastomers. Ideal elastomers that are concurrently tough, recyclable, degradable in urgent need, but preparation remains a rigorous challenge. Herein, polycaprolactone (PCL) based polyurethane elastomer is designed prepared meet this demand. Owing presence dynamic coordination bond occurrence strain-induced crystallization, obtained exhibits high toughness ≈372 MJ m-3 unprecedented fracture energy ≈646 kJ m-2 , which much higher than natural rubber (≈50 for ≈10 energy). In addition, can be recycled at least three times using solvent without losing its mechanical properties degraded by lipase ≈2 months. Finally, biological experiments demonstrate possesses good biocompatibility facilitate wound healing mice when used as sutures. It believed meets requirements next-generation expected emerging fields such biomedicine, flexible electronics, robotics beyond.

Language: Английский

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High-Strength, Self-Healing, Recyclable, and Catalyst-Free Bio-Based Non-Isocyanate Polyurethane

ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(15), P. 6100 - 6113

Published: April 5, 2023

Non-isocyanate polyurethanes (NIPUs) from renewable resources have attracted wide attention because of their remarkable benefits to sustainable development and green production. In this work, a strong, self-healing, catalyst-free NIPU (ECMP) was prepared based on the hyperbranched bio-based cyclic carbonate (Ec-MTDA) synthesized through catalytic carbonization 1,8-menthane diamine (MTDA) CO2. The rigid structures ECMP enable improved mechanical properties that high tensile strength up 34.9 MPa can be achieved. Benefiting dynamic transesterification reaction between carbamate hydroxyl groups, presents favorable reprocessing properties, shape memory. Notably, 91% original recovered after self-healing behavior. addition, abundant polar groups provide excellent adhesion for with shear 7.09 MPa. This study provides promising strategy design NIPUs, which broadens applications in printing, furniture, packaging, other industries.

Language: Английский

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