MACROMOLECULAR RAPID COMMUNICATIONS
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2023
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IF 4.6
Zhengxu Jin,Hongyan Liu,Huijuan Zhang
Ionogels possess high conductivity, stretchability, and adhesion, making them promising as flexible sensors. However, it remains challenging to fabricate an ionogel which integrates excellent environment endurance, superior mechanical strength, high self-healing efficiency, and super adhesion. Herein, a supramolecular ionic liquid is synthesized using calcium chloride and 1-butyl-3-methylimidazolium chloride. An advanced ionogel based on this supramolecular ionic liquid is conveniently constructed by a one-pot method with acrylamide and acrylic acid as monomers. The supramolecular cross-linking network, formed by affluent coordination interactions, hydrogen bonds, and electrostatic interactions, provides the ionogel with ideal mechanical strength (tensile strength up to 1.7 MPa), high self-healing efficiency (up to 149%), super adhesion (up to 358 kPa on aluminum), excellent solvent tolerance (less than 10% weight increase, high mechanical and sensing performance retention after being soaked in organic solvents), and low-temperature endurance (breaking elongation can reach 87% at −30 °C). The supramolecular ionogels can function as multi-mode sensors, capable of monitoring strain and different amplitudes of human movements in real-time. Moreover, the sensing performance of ionogels remains unaffected even after being self-healed or exposure to organic solvents. It is expected that this study could offer valuable design ideas to construct advanced gel materials applicable in complicated environment.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Shuangfei Xiang,Feng Zheng,Shuangshuang Chen,Qinghua Lu
Flexible electronic materials have aroused significant interest due to the need for flexible electronics in a variety of applications. However, several obstacles such as low mechanical properties, interfacial adhesion problems, and nonreusability hinder their rapid development. Here, an ionogel was developed by a one-step photopolymerization of an ionic liquid (IL) with the C═C bond of 1-vinyl-3-butylimidazolium tetrafluoroborate in another ionic liquid solution of 1-butyl-3-methylimidazolium tetrafluoroborate without a chemical cross-linker. The poly(ionic liquid) and the ionic liquid (PIL/IL) were highly compatible and resulted in an extremely uniform, stable, and optically transparent PIL/IL ionogel. In addition, this method also avoided complicated solvent replacement in the preparation processes of common ionogels. Our experimental and theoretical results showed that the reported ionogel integrated excellent mechanical properties, ultrastrong adhesive, self-healability, and recyclability. These remarkable advantages were benefited from the strong electrostatic force and other noncovalent bond interactions in the ionogel system. The unique ionogel presented in this study is therefore an ideal candidate material for self-adhesive and reusable wearable electronics.
研究领域:
材料科学
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柔性电子学
✓ 已验证
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
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2023
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IF 8.6
Pengli Zhang,Bin Zhang,Jiansen Pan,Guoliang Zhang,Chunfeng Ma,Guangzhao Zhang
Adhesives with ultrastrong adhesion performance and environmental tolerance under extreme conditions, such as low temperatures or immersion in organic solvents, are of critical need in aerospace, aircraft, energy, and chemical industries but rare. Herein, a solvent-free and highly cross-linked nonisocyanate polyurethane (NIPU) adhesive with ultrastrong interfacial adhesion, superior substrate versatility, and excellent tolerance to extreme conditions is reported. The adhesive is fabricated by a one-step strategy combining sol–gel chemistry and cyclic carbonate–amine polyaddition. The former results in an amine-terminated hyperbranched siloxane, which can promote the polyaddition reaction and enhance the cross-linking density, and the latter yields NIPU with high-density polar groups. The adhesive exhibits an ultrahigh adhesion strength of up to 20.67 MPa ascribed to the tough cohesion and high-density hydrogen bonds established on the interface. Moreover, the adhesive exhibits superior versatility to different substrates, including ceramic, steel, aluminum alloy, copper alloy, poly(methyl methacrylate), polyethylene, glass, and wood. Furthermore, the NIPU adhesive can be cured at low temperatures and exhibits excellent environmental tolerance to extreme conditions including ultralow temperature (−196 °C) and organic solvents. The novel adhesive has promising potential for applications under specific and extreme conditions such as aerospace, aircraft, energy, and chemical industries.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Wen Li,Fang Wang,Jiaqi Liu,Jiajun Wang,Lingqi Deng
Hydrogels are widely used as functional smart materials in wearable electronics and other applications. However, limitations in certain properties restrict their broader utility. In this paper, halometallate ionic liquids, synthesized by combining ionic liquids (ILs) with metal Zn salts, were incorporated into glycerol to create supramolecular liquids. These served as functional auxiliaries for a composite hydrogel synthesized by combining a p(AM-co-HEMA) copolymer network with a macromolecular carboxymethylcellulose (CMC) interpenetrating network. Meanwhile, lignin nanoparticles (LNPs) facilitated the redox reactions with Zn ions and accelerated free radical polymerization. The composite hydrogel, exhibiting tunable mechanical properties due to abundant metal coordination and hydrogen bonding, demonstrates high tensile elongation at break (1300 %), excellent adhesion (462.3 kPa), freezing resistance (−60 °C), high moisture retention, significant temperature sensitivity (TCR = −11.47 %/°C at 20–35 °C), and good electrical conductivity (1.56 S/m). Its high sensitivity (gauge factor, GF = 5.78; pressure sensitivity = 13.74 kPa −1 ) and fast response time (0.1 s) further enhance its capabilities. Consequently, these multifunctional hydrogels find applications in strain, pressure, and temperature sensors, as well as in capacitive pens and energy generation. This research offers a pathway for integrating hydrogel-based electronics into intelligent human-computer interaction, information transmission, health monitoring, and traffic detection systems.
研究领域:
材料科学
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电子工程
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化学合成
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yaping Li,Le Li,Zhongpan Zhang,Jingru Cheng,Yongsheng Fei,Lingbin Lu
Self-healing conductive hydrogels create an important class of smart skin materials with robust mechanical properties and sensitivity. Yet, these reported hydrogels cannot function steadily or be widely used because of expensive cost, complex synthetic process and weak stability. Reported here is a novel interpenetrating network hydrogel based on an all-natural strategy with carboxymethyl cellulose and dopamine as raw materials. The interpenetrating network was constructed via a facile one-step method with amidation reaction and oxidative self-polymerization occurred simultaneously. The impressive features, self-healing performance and mechanism of the hydrogel were explored and unfold. This hydrogel could not only self-heal completely after destruction (3h 98.37%), but also had high sensitive feature (GF=4.741). It could detect various body movements (even throat vocalization and pulse beat) as a sensor in real-time. The excellent self-healing performance was thanked to multiple noncovalent reversible interactions. Both ultraviolet light and high water content contributed to the self-healing process. At the same time, this hydrogel showed super-adhesion (427±4 KPa) to various surfaces, such as human skin, paper, plastic, branch, stone, leaf and so on. And the super-adhesion character enabled the hydrogel to lift up to 10,000 times its own weight. Due to its unique structure, excellent self-healing performance, good tensile and compressive properties, impressive resilience, super-adhesion and high sensitivity, this versatile hydrogel is expected to serve as a novel smart skin system with remarkable intelligent wearable properties.
研究领域:
材料科学
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生物材料
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纳米技术
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生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）