Mechanically Ultra-Robust Elastomers Integrating Self-Healing and Recycling Properties Enable Information Encryption and Hierarchical Decryption

Xu, Jing; Wang, Xiaoyue; Li, Song; Zhang, Yaoming; Zhang, Xinrui; Wang, Qihua; Wang, Tingmei; Yang, Zenghui; Tao, Liming

doi:10.1021/acsami.3c09133

Cited by 8 publications

(2 citation statements)

References 56 publications

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“…Indeed, this thermoset elastomer (i.e., SPUUN-IE) possessed a tensile toughness of 1245.2 ± 16.9 MJ m −3 and an ultimate engineering stress of 110.8 ± 4.9 MPa (Table 1), the value of tensile toughness outperforming all thermoset elastomers reported to date (Figure 3c). [8][9][10][11][12][13][14][42][43][44] Movie S1 (Supporting Information) shows that a 250%-deformed SPUUN-IE elastomer (width = 10.0 mm, thickness = 0.8 mm, and weight = 0.841 g) was sufficiently strong to lift a 25.0-kg weight, thereby demonstrating its superior mechanical robustness. Since the cross-sectional area of the elastomer specimen varied during the tensile process, the true stress-strain curves were calculated from the engineering stress-strain curves.…”

Section: Optimization Of Spuun-i a E B And The Resulting Performance ...mentioning

confidence: 99%

Mismatched Supramolecular Interactions Facilitate the Reprocessing of Super‐Strong and Ultratough Thermoset Elastomers

Wang,

Zhang,

Zhang

et al. 2024

Advanced Materials

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Thermoset elastomers have been extensively applied in many fields because of their excellent mechanical strengths and durable characteristics, such as an excellent chemical resistance. However, in the context of environmental issues, the non‐recyclability of thermosets has become a major barrier to the further development of these materials. Here, we report a well‐tailored strategy to solve this problem by introducing mismatched supramolecular interactions (MMSIs) into a covalently cross‐linked poly(urethane‐urea) network with dynamic acylsemicarbazide moieties. The MMSIs significantly strengthen and toughen the thermoset elastomer by effectively dissipating energy and resisting external stress. In addition, the elastomer recycling efficiency is improved 2.7‐fold due to the superior reversibility of the MMSIs. The optimized thermoset elastomer, i.e., SPUUN‐IE, features outstanding characteristics, including an ultra‐high tensile strength (110.8 MPa), an unprecedented tensile toughness (1245.2 MJ m–3), as well as remarkable resistance to chemical media, creep, and damage. Most importantly, SPUUN‐IE exhibits an extraordinary multi‐recyclability, and the 4th recycling efficiency remains close to 100%. This scalable method promotes the development of thermosets with both high performance and excellent recyclability, thereby providing valuable guidance for addressing the issue of non‐recyclability from a molecular design standpoint.This article is protected by copyright. All rights reserved

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Section: Optimization Of Spuun-i a E B And The Resulting Performance ...mentioning

confidence: 99%

Mismatched Supramolecular Interactions Facilitate the Reprocessing of Super‐Strong and Ultratough Thermoset Elastomers

Wang,

Zhang,

Zhang

et al. 2024

Advanced Materials

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“…This aligns with the principles of green economic development, and the aqueous phase system of WPU allows for multiple attempts and adjustments, especially considering the easily regulated synthesis path of WPU that accommodates various functions such as shape memory and luminous performance. WPU films are applied in several areas, including smart skin technology and energy-efficient windows. − However, challenges arise from the high enthalpy of water evaporation and prolonged drying times in the conventional cast film-making method, limiting precision in the thickness and shaping. − This limitation becomes especially critical when controlling the thickness and unique shape of the shape memory functional material preparation. Therefore, the preparation of films with controllable thickness on the surface of an arbitrarily shaped substrate becomes important.…”

Section: Introductionmentioning

confidence: 99%

Photoreversible Shape Memory Polyurethane Films Prepared Using Demulsification-Induced Fast Solidification for Multilevel Information Encryption Application

Wang,

Omoniyi,

Zhang

et al. 2024

ACS Appl. Polym. Mater.

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This study introduces waterborne polyurethane (WPU) films with defined shape memory and multistimuli responsive properties for information encryption. The shape memory feature is attributed to the semicrystalline structure of polycaprolactone (PCL) serving as the soft segment in the WPU. Incorporating the photoreversible moiety 9-anthracenemethanol (9-An) impacts photoresponsive characteristics and enhances the tensile strength of the film after 1 h of ultraviolet irradiation. The demulsificationinduced fast solidification (DIFS) method offers rapid film preparation, controllable thicknesses, and multidimensional shapes, surpassing the conventional cast method. Cellulose nanocrystals (CNCs) render the WPU composite films solvent-sensitive, inducing color changes through cholesteric structure pitch alterations. The resulting combination of photo-and solvent-sensitivity with shape memory attribute positions the films as promising candidates for multilevel information encryption, offering an approach to functional polymer film development.

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Eu‐Doped Polyurethane with Efficient Multicolor Fluorescence, Self‐Healing, Stimuli‐Responsiveness and Its Diverse Applications

Wang,

Kong

et al. 2024

Adv Funct Materials

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Multicolor lanthanide‐doped polymers have found versatile applications in data encryption, sensing, and smart display. However, multiple components, sophisticated design, and complex preparation procedures are often required. In contrast, their intrinsic and multicolor fluorescence emission is been effectively used. Herein, Eu‐doped polyurethane (ETP@PU), integrating tunable multicolor emission, self‐healing, and multi‐responsiveness, is prepared through a facile route via step‐growth polymerization of PU using commercial Eu‐ligand (Eu(TTA)3Phen, ETP) as a fluorophore. FTIR and XPS analysis demonstrate the successful coordination of Eu3+ with carbamate groups of PU, which not only enhances the mechanical properties of PU but also bestows unique luminescent properties. With increasing ETP content, the intrinsic fluorescence of PU declines, while that of Eu displays a discernible enhancement, resulting in the tunable multicolor emission. The highest quantum yield of Eu‐related emission reaches 71.3% due to the robust coordination and efficient energy transfer between Eu3+ and PU. Moreover, the ETP@PU exhibits excellent self‐healing capacity and multi‐responsiveness, and their potential applications are also investigated in the field of light‐emitting diodes, data encryption, and self‐healing process monitoring. This work provides a facile and efficient strategy to develop multicolor lanthanide‐doped polymers promising for various applications.

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Mechanically Ultra-Robust Elastomers Integrating Self-Healing and Recycling Properties Enable Information Encryption and Hierarchical Decryption

Cited by 8 publications

References 56 publications

Mismatched Supramolecular Interactions Facilitate the Reprocessing of Super‐Strong and Ultratough Thermoset Elastomers

Mismatched Supramolecular Interactions Facilitate the Reprocessing of Super‐Strong and Ultratough Thermoset Elastomers

Photoreversible Shape Memory Polyurethane Films Prepared Using Demulsification-Induced Fast Solidification for Multilevel Information Encryption Application

Eu‐Doped Polyurethane with Efficient Multicolor Fluorescence, Self‐Healing, Stimuli‐Responsiveness and Its Diverse Applications

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