Ultrahigh Mechanical Strength and Robust Room-Temperature Self-Healing Properties of a Polyurethane–Graphene Oxide Network Resulting from Multiple Dynamic Bonds DOI
Xiaobo Zhu, Wujun Zhang, Guangming Lu

et al.

ACS Nano, Journal Year: 2022, Volume and Issue: 16(10), P. 16724 - 16735

Published: Oct. 10, 2022

Addressing the conflict between achieving high mechanical properties and room-temperature self-healing ability is extremely significant to a breakthrough in application of materials. Therefore, inspired by natural spider silk nacre, supramolecular material with ultrahigh strength toughness developed synergistically incorporating flexible disulfide bonds dynamic sextuple hydrogen (H-bonds) into polyurethanes (PUs). Simultaneously, abundant H-bonds are introduced at interface graphene oxide nanosheets multiple PU matrix afford strong interfacial interactions. The resulting urea-containing an inverse artificial nacre structure has record (78.3 MPa) (505.7 MJ m-3), superior tensile (1273.2% elongation break), rapid abilities (88.6% 25 °C for 24 h), forming strongest elastomer reported date thus upending previous understanding traditional In addition, this bionic PU-graphene network endows fabricated intelligent robot functional repair shape memory capabilities, providing prospects fabrication devices.

Language: Английский

Mechanically robust, readily repairable polymers via tailored noncovalent cross-linking DOI Open Access
Yu Yanagisawa, Yiling Nan, Kou Okuro

et al.

Science, Journal Year: 2017, Volume and Issue: 359(6371), P. 72 - 76

Published: Dec. 14, 2017

Expanding the range of healable materials is an important challenge for sustainable societies. Noncrystalline, high-molecular-weight polymers generally form mechanically robust materials, which, however, are difficult to repair once they fractured. This because their polymer chains heavily entangled and diffuse too sluggishly unite fractured surfaces within reasonable time scales. Here we report that low-molecular-weight polymers, when cross-linked by dense hydrogen bonds, yield yet readily repairable despite extremely slow diffusion dynamics. A key was use thiourea, which anomalously forms a zigzag hydrogen-bonded array does not induce unfavorable crystallization. Another incorporate structural element activating exchange pairs, enables portions rejoin upon compression.

Language: Английский

Citations

894
A Highly Efficient Self‐Healing Elastomer with Unprecedented Mechanical Properties DOI
Luzhi Zhang,

Zenghe Liu,

Xueli Wu

et al.

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(23)

Published: April 12, 2019

It is highly desirable, although very challenging, to develop self-healable materials exhibiting both high efficiency in self-healing and excellent mechanical properties at ambient conditions. Herein, a novel Cu(II)-dimethylglyoxime-urethane-complex-based polyurethane elastomer (Cu-DOU-CPU) with synergetic triple dynamic bonds developed. Cu-DOU-CPU demonstrates the highest reported performance for elastomers room temperature, tensile strength toughness up 14.8 MPa 87.0 MJ m-3 , respectively. Meanwhile, spontaneously self-heals temperature an instant recovered of 1.84 continuously increased 13.8 MPa, surpassing original all other counterparts. Density functional theory calculations reveal that coordination Cu(II) plays critical role accelerating reversible dissociation dimethylglyoxime-urethane, which important elastomer. Application this technology demonstrated by stretchable circuit constructed from Cu-DOU-CPU.

Language: Английский

Citations

580
Towards Dynamic but Supertough Healable Polymers through Biomimetic Hierarchical Hydrogen‐Bonding Interactions DOI
Yan Song, Yuan Liu, Tao Qi

et al.

Angewandte Chemie International Edition, Journal Year: 2018, Volume and Issue: 57(42), P. 13838 - 13842

Published: Aug. 25, 2018

A biomimetic (titin protein molecular structure) strategy is reported for preparing transparent and healable elastomers featuring supertoughness (345 MJ m-3 ) high tensile strength (44 MPa) after self-healing enabled by hierarchical (single, double, quadruple) hydrogen-bonding moieties in the polymer backbone. The rigid domain containing H-bonds formed with urethane, urea, 2-ureido-4[1H]-pyrimidinone groups leads to a durable network structure that has enhanced mechanical properties also dynamic rapid self-healing. Healable polymers interactions show excellent recoverability energy dissipation owing interaction between chains. This of using hydrogen bonds as building blocks an alternative approach obtaining dynamic, strong, yet smart heavy-duty protection materials wearable electronics.

Language: Английский

Citations

518
Universally autonomous self-healing elastomer with high stretchability DOI Creative Commons
Hongshuang Guo, Yi Han, Weiqiang Zhao

et al.

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: April 27, 2020

Abstract Developing autonomous self-healing materials for applications in harsh conditions is challenging because the reconstruction of interaction material will experience significant resistance and fail. Herein, a universally highly stretchable supramolecular elastomer designed by synergistically incorporating multi-strength H-bonds disulfide metathesis polydimethylsiloxane polymers. The resultant exhibits high stretchability both unnotched (14000%) notched (1300%) samples. It achieves fast under universal conditions, including at room temperature (10 min healing), ultralow (−40 °C), underwater (93% healing efficiency), supercooled high-concentrated saltwater (30% NaCl solution −10 °C, 89% strong acid/alkali environment (pH = 0 or 14, 88% 84% efficiency). These properties are attributable to synergistic dynamic weak stronger bonds. A conducting device built with developed demonstrated, thereby providing direction future e-skin applications.

Language: Английский

Citations

462
Nano/Micro‐Manufacturing of Bioinspired Materials: a Review of Methods to Mimic Natural Structures DOI
Chaoqun Zhang, Daniel A. McAdams, Jaime C. Grunlan

et al.

Advanced Materials, Journal Year: 2016, Volume and Issue: 28(30), P. 6292 - 6321

Published: May 4, 2016

Through billions of years evolution and natural selection, biological systems have developed strategies to achieve advantageous unification between structure bulk properties. The discovery these fascinating properties phenomena has triggered increasing interest in identifying characteristics materials, through modern characterization modeling techniques. In an effort produce better engineered scientists engineers new methods approaches construct artificial advanced materials that resemble architecture function. A brief review typical naturally occurring is presented here, with a focus on chemical composition, nano‐structure, architecture. critical mechanisms underlying their are summarized, particular emphasis the role material recent progress nano/micro‐manufacturing bio‐inspired hybrid then detail. this case, nacre bone‐inspired structural petals gecko foot‐inspired adhesive films, lotus mosquito eye inspired superhydrophobic brittlestar Morpho butterfly‐inspired photonic structured coatings. Finally, some applications, current challenges future directions regard manufacturing provided.

Language: Английский

Citations

389
Mussel‐Inspired Hydrogels for Self‐Adhesive Bioelectronics DOI
Chaoming Xie, Xiao Wang,

Huan He

et al.

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 30(25)

Published: April 20, 2020

Abstract Wearable and implantable bioelectronics are receiving a great deal of attention because they offer huge promise in personalized healthcare. Currently available generally rely on external aids to form an attachment the human body, which leads unstable performance practical applications. Self‐adhesive highly desirable for ameliorating these concerns by offering reliable conformal contact with tissue, stability fidelity signal detection. However, achieving adequate long‐term self‐adhesion soft wet biological tissues has been daunting challenge. Recently, mussel‐inspired hydrogels have emerged as promising candidates design self‐adhesive bioelectronics. In addition self‐adhesiveness, chemistry offers unique pathway integrating multiple functional properties all‐in‐one bioelectronic devices, implications healthcare this report, recent progress area is highlighted specifically discussing: 1) adhesion mechanism mussels, 2) repeatable adhesion, 3) advance development hydrogel reconciling self‐adhesiveness additional including conductivity, toughness, transparency, self‐healing, antibacterial properties, tolerance extreme environment, 4) challenges prospects future

Language: Английский

Citations

385
Polymers with autonomous life-cycle control DOI
Jason F. Patrick, Maxwell J. Robb, Nancy R. Sottos

et al.

Nature, Journal Year: 2016, Volume and Issue: 540(7633), P. 363 - 370

Published: Dec. 13, 2016

Language: Английский

Citations

383
Mechanically controlled radical polymerization initiated by ultrasound DOI
Hemakesh Mohapatra, Maya Kleiman, Aaron P. Esser‐Kahn

et al.

Nature Chemistry, Journal Year: 2016, Volume and Issue: 9(2), P. 135 - 139

Published: Oct. 24, 2016

Language: Английский

Citations

313
Enzyme encapsulation in metal–organic frameworks for applications in catalysis DOI
Marek B. Majewski, Ashlee J. Howarth, Peng Li

et al.

CrystEngComm, Journal Year: 2017, Volume and Issue: 19(29), P. 4082 - 4091

Published: Jan. 1, 2017

Various methods for encapsulating enzymes in metal–organic frameworks are discussed and the catalytic activity of biocomposites prepared using these is highlighted.

Language: Английский

Citations

266
Toughening a Self‐Healable Supramolecular Polymer by Ionic Cluster‐Enhanced Iron‐Carboxylate Complexes DOI
Yuanxin Deng, Qi Zhang, Ben L. Feringa

et al.

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 59(13), P. 5278 - 5283

Published: Feb. 25, 2020

Supramolecular polymers that can heal themselves automatically usually exhibit weakness in mechanical toughness and stretchability. Here we exploit a toughening strategy for dynamic dry supramolecular network by introducing ionic cluster-enhanced iron-carboxylate complexes. The resulting simultaneous exhibits tough strength, high stretchability, self-healing ability, processability at room temperature. excellent performance of these distinct is attributed to the hierarchical existence four types combinations high-density network, including covalent disulfide bonds, noncovalent H-bonds, complexes clustering interactions. extremely facile preparation method this polymer offers prospects high-performance low-cost material among others coatings wearable devices.

Language: Английский

Citations

242