A strain-reinforcing elastomer adhesive with superior adhesive strength and toughness

Li, Chuan long; Dong, Wenbo; Li, Longyu; Dou, Zhengli; Li, Yuhan; Wei, Liuhe; Zhang, Qin; Fu, Qiang; Wu, Kai

doi:10.1039/d3mh00966a

Cited by 18 publications

(4 citation statements)

References 41 publications

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“…They demonstrated the multiphase structures not only reinforced the SEBS adhesives but also significantly improved their toughness. Similar results were also demonstrated by a furan‐containing biomimetic multiphase structure, [ 8 ] and a crystallizable soft segment multiphase structure, [ 9 ] respectively. Despite the significant progress in balancing strength and toughness, the obtained work of debonding is still limited (< 13 000 N m −1 ), indicating the improvement of mechanical dissipation is insufficient.…”

Section: Introductionsupporting

confidence: 79%

A Hierarchical Energy Dissipated Structure Enabled Strong, Ultra‐Tough, and Sustainable Adhesives

Fu,

Chen,

Chen

et al. 2024

Adv Funct Materials

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Sustainable adhesives with simultaneous high strength and excellent ductility are important but still challenging. Here, an epoxy adhesive with simultaneously strong, tough, and sustainable features by designing a new hierarchical energy‐dissipated cross‐linking structure is reported: an annular structure containing quadruple internal B─N coordination boronic esters (AQBN). Under small strain, the AQBN structure is rigid to enhance the tensile strength of the adhesive. With medium strain applied, its non‐coplanar ring and internal quadruple B─N coordination can orderly open, providing mechanical energy dissipation and excellent ductility. Therefore, this multilevel structure can endow epoxy adhesives with both high strength and toughness. Besides, the rapid dynamic exchange and internal B─N coordination in boronic esters enable the adhesives to have good sustainability and environmental tolerance, respectively. As a result, the epoxy adhesives exhibit simultaneous high adhesive strength (18.5 MPa), outstanding toughness (work of debonding of 29692 N m−1), good chemical/physical recyclability, and excellent environmental reliability (humidity, water, high/ultralow temperature, and organic solvents). This work provides a new strategy for balancing the strength, toughness, and sustainability of adhesives.

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Section: Introductionsupporting

confidence: 79%

A Hierarchical Energy Dissipated Structure Enabled Strong, Ultra‐Tough, and Sustainable Adhesives

Fu,

Chen,

Chen

et al. 2024

Adv Funct Materials

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“…The lower adhesive strength at the higher temperature might be due to weakened hydrogen bonds and faster polymer segmental motion. [ 10 ] Specifically, PUa‐C3‐TFSI exhibited superior adhesion performance compared to other references studied adhesive systems, such as ionic liquid, poly(ionic liquid), and polyurea‐based adhesive (Figure 2b). [ 9,11 ] Moreover, the replacement of Br − anion with PF 6 − or TFSI − resulted in a significant enhancement of the corresponding adhesion strengths of PUa‐C3 and PUa‐OH, indicating that the counter anions in the ionic PUas play a substantial role in influencing their adhesion performance.…”

Section: Resultsmentioning

confidence: 96%

High‐Toughness CO₂‐Sourced Ionic Polyurea Adhesives

Ou,

Pan,

Liu

et al. 2024

Advanced Materials

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Polyurea (PUa) adhesives are renowned for their exceptional adhesion to diverse substrates even in harsh environments. However, the presence of quadruple bidentate intermolecular hydrogen bonds in the polymer chains creates a trade‐off between cohesive energy and interfacial adhesive energy. To overcome this challenge, a series of CO2‐sourced ionic PUa adhesives with ultra‐tough adhesion to various substrates were developed. The incorporated ionic segments within the adhesive serve to partially mitigate the intermolecular hydrogen bonding interactions while conferring unique electrostatic interactions, leading to both high cohesive energy and interfacial adhesive energy. The maximum adhesive strength of 10.9 MPa could be attained by ionizing the CO2‐sourced PUa using bromopropane and subsequently exchanging the anion with lithium bis(trifluoromethylsulfonyl)imide. Additionally, these ionic PUa adhesives demonstrate several desirable properties such as low‐temperature stability (‐80°C), resistance to organic solvents and water, high flame retardancy, antibacterial activity, and UV‐fluorescence, thereby expanding their potential applications. This study presents a general and effective approach for designing high‐strength adhesives suitable for a wide array of uses.This article is protected by copyright. All rights reserved

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“…The HBs with low binding energy usually behave as sacrificial bonds, which allow the large deformation of the elastomer and dissipate the stress energy. 53 HBs possessing high binding energy, such as oxalamide−oxalamide, have been identified as the best reinforcing agent for polymer networks to improve their mechanical strength. 26 According to published papers, the synergistic effect of hierarchical HB interaction will play an important role in improving the mechanical properties of the PA-BP x elastomers.…”

Section: Resultsmentioning

confidence: 99%

“…The calculation results show that the binding energies vary from −39.4 to −19.7 kcal·mol –1 (Figure e and Table S2). The HBs with low binding energy usually behave as sacrificial bonds, which allow the large deformation of the elastomer and dissipate the stress energy . HBs possessing high binding energy, such as oxalamide–oxalamide, have been identified as the best reinforcing agent for polymer networks to improve their mechanical strength .…”

Section: Resultsmentioning

confidence: 99%

High-Performance Biobased Elastomers with Both High Strength and High Toughness

Peng,

Lan,

et al. 2024

ACS Appl. Polym. Mater.

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Harvesting sustainable biobased elastomers with both high strength and high toughness holds great promise for various applications. However, the inherent conflicts between these properties make it challenging to achieve a simultaneous balance. Here, inspired by the structure of spider silk, we have synthesized a multiphase polymer (PA-BP x ) containing oxalamides derived from biomass. The introduction of a benzene ring structure, combined with the double hydrogen bonds of oxalamide, results in smaller and more uniformly distributed hard domains, concurrently enhancing the molecular chain rigidity. The molecular structure described facilitates energy dissipation through the destruction and reformation of hard domains, achieving a remarkable balance between superior mechanical robustness and toughness. The PA-BP 40 elastomer demonstrates exceptional advantages in both tensile strength and toughness compared to other reported biobased and filled biobased elastomers, with a toughness of 230 MJ•m −3 and maintaining a high tensile strength of 46.6 MPa. These remarkable mechanical properties make the PA-BP 40 elastomer a promising material for various applications where both high strength and toughness are required. Moreover, the elastomers exhibit strong fluorescence even in the absence of conventional chromophores, highlighting their potential for fluorescent anticounterfeiting applications. Overall, this study presents a promising strategy for developing sustainable elastomers with desirable performance characteristics, thus contributing to the advancement of biobased materials in various applications.

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A strain-reinforcing elastomer adhesive with superior adhesive strength and toughness

Abstract: Strong and ductile adhesives often behave with both interfacial and cohesive failure during the debonding process. Herein, we report a rare self-reinforcing polyurethane adhesive that shows the different phenomenon of...

Cited by 18 publications

References 41 publications

A Hierarchical Energy Dissipated Structure Enabled Strong, Ultra‐Tough, and Sustainable Adhesives

A Hierarchical Energy Dissipated Structure Enabled Strong, Ultra‐Tough, and Sustainable Adhesives

High‐Toughness CO₂‐Sourced Ionic Polyurea Adhesives

High-Performance Biobased Elastomers with Both High Strength and High Toughness

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A strain-reinforcing elastomer adhesive with superior adhesive strength and toughness

Abstract: Strong and ductile adhesives often behave with both interfacial and cohesive failure during the debonding process. Herein, we report a rare self-reinforcing polyurethane adhesive that shows the different phenomenon of...

Cited by 18 publications

References 41 publications

A Hierarchical Energy Dissipated Structure Enabled Strong, Ultra‐Tough, and Sustainable Adhesives

A Hierarchical Energy Dissipated Structure Enabled Strong, Ultra‐Tough, and Sustainable Adhesives

High‐Toughness CO2‐Sourced Ionic Polyurea Adhesives

High-Performance Biobased Elastomers with Both High Strength and High Toughness

Contact Info

Product

Resources

About

High‐Toughness CO₂‐Sourced Ionic Polyurea Adhesives