Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 8
·4344-4354
·
IF 12.732
LiangLiang Xia,HongJun Tu,Wen Zeng,XiaoLing Yang,Ming Zhou,Linkai Li,Xiao Guo
The preparation of room-temperature self-healing polymeric materials with good healing efficiency and high mechanical strength is challenging. Two processes are essential to realise the room-temperature self-healing of materials: (a) a non-crystallised structure and interpenetration and diffusion of polymer chains; (b) fast reorganisation of the intermolecular bonds at damaged sites. Using these strategies, a new polyurethane elastomer is prepared in this study via three-step polyadditions using polytetramethylene ether glycol, isophorone diisocyanate, 2,6-pyridinedimethanol, and 4,4′-methylene bis(2-chloroaniline). The prepared elastomer possesses excellent tensile strength (34.1 MPa), high toughness (127.3 MJ m−3), high fracture energy (119.1 kJ m−2), and good stretchability (2014%). Furthermore, it exhibits strain-induced strengthening behaviour and its mechanical performances are superior to those of previously reported room-temperature self-healing polymer materials. The polyurethane elastomer synthesised via optimized hierarchical H-bonding interactions ultimately exhibited a synchronous self-healing efficiency of more than 83% with tensile strength, elongation, and toughness at 25 °C ± 2 °C after self-healing for 48 h. This study offers beneficial insights into the preparation of room-temperature self-healing polymers with high mechanical strength.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 12
·4440
·
IF 3.4
Baolei Wang,Zewei Li,Xinru Liu,Lulu Li,Jianxiang Yu,Shuang Li,Gaiping Guo,Dahai Gao,Yuhua Dai
Intrinsic self-healing polymers via dynamic covalent bonds have been attracting extensive attention because of their repeatable self-healing property. Herein, a novel self-healing epoxy resin was synthesized with disulfide-containing curing agent via the condensation of dimethyl 3,3′-dithiodipropionate (DTPA) and polyether amine (PEA). Therefore, in the structure of cured resin, flexible molecular chains and disulfide bonds were imported into the cross-linked polymer networks for triggering self-healing performance. The self-healing reaction of cracked samples was realized under a mild condition (60 °C for 6 h). The distribution of flexible polymer segments, disulfide bonds and hydrogen bonds in cross-linked networks plays a great role in the self-healing process of prepared resins. The molar ratio of PEA and DTPA strongly affects the mechanical performance and self-healing property. Especially when that molar ratio of PEA to DTPA is 2, the cured self-healing resin sample showed great ultimate elongation (795%) and excellent healing efficiency (98%). The products can be used as an organic coating, in which the crack could self-repair during a limited time. The corrosion resistance of a typical cure coating sample has been testified by an immersion experiment and electrochemistry impedance spectrum (EIS). This work provided a simple and low-cost route to prepare a self-healing coating for prolonging the service life of conventional epoxy coatings.Keywords:self-healing polymer;epoxy resin;dynamic covalent bond;healing efficiency
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jialiang Li,Yinghu Song,Guojun Song,Zewen Li,Zhaoji Li,Xirui Yang,Xiaoru Li
Self-healing polymers, with their ability to extend service life and conserve resources, have garnered significant attention across various fields due to their immense potential applications. However, most repairable polymers typically require high temperatures for repair, and their relatively weak mechanical properties limit their practical use. Moreover, the flammability of polymers not only poses safety hazards during use but also fails to meet specific requirements for flame retardancy in certain fields. Addressing these issues, this study successfully designed a reactive self-extinguishing room-temperature self-healing polyurethane (PU) by introducing hyperbranched catechol (DBPA) onto the PU main chain. The prepared self-healing PU elastomer (DPU) exhibited high tensile strength (∼51.2 MPa), outstanding toughness (∼119.0 MJ/m 3 ), recyclability, and good flame retardancy. Through intermolecular and intramolecular multilevel hydrogen bonding, the prepared DPU 0.6 achieved room-temperature self-healing with an efficiency of approximately 71.2 %. The results showed that the addition of trace amounts of DBPA (0.6 wt%) significantly enhanced the flame retardancy and thermal stability of DPU. Compared to DPU 0 , the heat release rate (HRR) of DPU 0.6 decreased by approximately 13 %, the total heat release (THR) reduced by 18 %, and the time to ignition (TTI) was extended by 7 s (reduced by ∼ 21 %). This study not only provides insights into the synthesis and design of novel self-healing PU but also further expands the application scope of self-healing PU.
研究领域:
材料科学
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高分子化学
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火焰阻燃研究
✓ 已验证
产品关联
DOI
高影响因子
Nano Materials Science
·
2024
·
IF 12.6
Hao Wu,Jinqiu Tao,Junhao Xie,Chengbao Liu,Qianping Ran
Intelligent polymers have garnered significant attention for enhancing component safety, but there are still obstacles to achieving rapid self-healing at room temperature. Here, inspired by the microscopic layered structure of mother-of-pearl, we have developed a biomimetic composite with high strength and self-repairing capabilities, achieved by the ordered arrangement of pearl-like structures within a flexible polyurethane matrix and GO nanosheets functionalized by in situ polymerization of carbon dots (CDs), this biomimetic interface design approach results in a material strength of 8 MPa and toughness (162 MJ m −3 ), exceptional ductile properties (2697 % elongation at break), and a world-record the fast and high-efficient self-healing ability at room temperature (96 % at 25 °C for 60 min). Thereby these composites overcome the limitations of dynamic composite networks of graphene that struggle to balance repair capability and robustness, and the CDs in situ loaded in the interfacial layer inhibit corrosion and prevent damage to the metal substrate during the repair process. (The Ƶ f=0.01Hz was 1.81 × 10 9 Ω cm 2 after 2 h of healing). Besides, the material can be intelligently actuated and shape memory repaired, which provides reliable protection for developments in smart and flexible devices such as robots and electronic skins.
研究领域:
材料科学
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仿生学
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智能材料
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2025
·
IF 6.9
Ji Ma,Xinfeng Pang,Zhijie Chen,Lili Du,Ping Qiu
Corrosion remains a critical challenge, particularly in aqueous environments, where traditional coatings struggle to maintain integrity. Despite advancements, self-healing materials often exhibit insufficient healing efficiency and stability underwater. This work presents a novel PDMS-based self-healing elastomer, PDMS-SS 1 /UPy 1 , incorporating dynamic disulfide bonds and 2-ureido-4[1H]-pyrimidone (UPy) unit for robust amphibious self-healing. Synthesized via a two-step reaction, PDMS-SS 1 /UPy 1 exhibits high thermal stability (T 5 % = 362 °C), excellent mechanical properties, and >92 % self-healing efficiency at 90 °C. FTIR, Raman, and XPS confirm successful SS/UPy incorporation, while SEM and AFM reveal uniform morphology. Contact angle measurements and adhesion tests confirm environmental stability and substrate compatibility. Furthermore, EIS demonstrates exceptional corrosion resistance (>10⁸ Ω·cm² in NaCl solution), and the innovative application of distribution of relaxation times (DRT) analysis provides deeper insights into the coating's electrochemical behavior. PDMS-SS 1 /UPy 1 offers a promising solution for durable anti-corrosion protection in demanding aqueous environments.
研究领域:
材料科学
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腐蚀与防护
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Wencong Zhang,Minhui Wang,Jiahui Zhou,Yeming Sheng,Min Xu,Xiaolin Jiang,Yuanhao Ma,Xun Lu
As far as the self-healing elastomers are concerned, there is a contradiction between mechanical strength and self-healing performance because it’s hard to acquire strong intermolecular interaction and flexible segments motion concurrently. How to prepare room-temperature self-healing elastomers with high strength remains an enormous challenge. Herein, we synthesized room-temperature self-healing thermoplastic polyurethanes (TPUs) incorporated with multiple hydrogen bonds, reversible disulfide bonds and coordination bonds simultaneously. The prepared elastomers exhibit a tensile strength of over 16.1 MPa and a fracture strain of 771%, which are robust in comparison to most previous reports. The multiple dynamic bonds endow the elastomers with a high self-healing efficiency (94%) within 24 h at room temperature . The self-healing mechanism was expounded from the perspective of the aggregate structure such as the degree of aggregation, the degree of microphase separation and molecular dynamics. It can be calculated by the dynamic mechanical analysis that the activation energy of the target elastomer is lower than that of samples without dynamic interactions, which is of advantage to self-healing properties.
研究领域:
材料科学
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高分子化学
✓ 已验证
DOI
高影响因子
Materials Advances
·
2022
·Vol. 3
·期 16
·6609-6618
·
IF 0
Mengyun Zhang,Shanjun Ding,Riming Cong,Yunjun Luo
Waterborne polyurethanes (WPUs), commonly used as coatings and adhesives, produce microcracks when suffering from severe environmental stimuli or continuous mechanical loads. So far, there have only been limited self-healing functional groups, such as disulfide bonds, or Diels–Alder reactions, utilized in WPUs. Herein, we have prepared a novel self-healing waterborne polyurethane (SHWPU) by introducing silver–thiol coordination interactions, which exhibit excellent self-healing performance. WPU–Ag@S-0.50 with microcracks could recover to its original state at room temperature within 30 min. The self-healing efficiency in terms of its tensile strength is 98.69%, demonstrating that introducing silver–thiol coordination interactions is an effective strategy to realize self-healing.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Anyao Ma,Guanglin Wang,Zhenglong Yang,Liangjiu Bai,Hou Chen,Wenxiang Wang,Huawei Yang,Donglei Wei,Lixia Yang
Janus nanomaterials can be highlighted to design a series of smart materials with the remarkable characteristic of two different properties or constituents. In this manuscript, functional Janus graphene oxide-type (GO-type) nanomaterials were fabricated by Pickering emulsion template and successfully applied to develop of dual self-healing nanocomposite hydrogels. Asymmetric functionalization of Janus nanosheets were achieved in typical oil-in-water Pickering emulsion by atom transfer radical polymerization (ATRP) and mussel-inspired chemistry. Poly(2-(acryloyloxy)ethyl ferrocenecarboxylate) (PMAEFc) and polydopamine (PDA) were unsymmetrically grafted on the two sides of GO (Janus GO-PMAEF/PDA (JGNs)), which successfully applied in self-healing nanocomposite hydrogels. The collaborative effect of metal-ligand coordination and host-guest interaction make the dual self-healing hydrogels have excellent self-healing properties (self-healing efficiency can reach to 93.4% within 1 h) and mechanical strength (tensile strength of 0.94 MPa and strain of 508.5%). Therefore, these chemical asymmetric JGNs have outstandingly application prospect in the development of smart materials.
研究领域:
材料科学
·
化学工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Wenpeng Zhao,Zixiang Zhang,Jian Hu,Xianqi Feng,Jun Xu,Yumin Wu,Shouke Yan
Fabrication of self-healing elastomers with high strength and real-time (<30 s) self-healing capability is still a huge challenge. It is well documented that biological tissues with hierarchically anisotropic structures possess excellent self-healing and mechanical properties. Self-healing elastomer with similar hierarchically anisotropic structures as biological tissues has, however, not been reported yet. Herein, we highlight a facile strategy to fabricate self-healing elastomers with hierarchically anisotropic structures similar to tendons and ligaments by drying precursor hydrogels under fixed strains. Elastomers obtained by drying at 200% strain exhibit a high strength (8.4 MPa) and ultrafast self-healing ability (86% recovery after 10 s) under ambient conditions. Besides, elastomers with a surface CNT coating layer can be easily prepared by directly spraying the CNT suspension onto the surface of precursor hydrogel before drying under strain. Benefiting from the hierarchical structure of the surface CNT layer, the elastomer can be used as a sensor to detect minute human motions. This study provides a novel strategy for fabricating hierarchically anisotropic self-healing elastomers and simultaneously achieving high strength and real-time self-healing ability.
研究领域:
材料科学
·
生物仿生学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Heng Xu,Zhen Liu,Zhijie Fan,Xiandie Zhang,Haozhe Li,Kai Yao,Wei Wang,Bizhen Chen,Xiaode Guo
Material self-healing involves the dissociation and reorganization of the dynamic bonds of materials. Thus, the material self-healing process is primarily driven by the dynamic nature of bonds and the high mobility of molecular chains. However, the low bond energy of these dynamic bonds limits the enhancement of the strength of materials, and their inability to withstand harsh real-world conditions compromises their service life. Therefore, the current research focus in this field remains on high-strength self-healing materials. In this study, a hierarchical hydrogen-bonded crosslinking network was constructed and a high-strength self-healing polyurethane material was successfully synthesized. Infrared and hydrogen spectroscopy analyses reveal that the hierarchical hydrogen-bonded crosslinked network features both strong and weak hydrogen bonds. The strong hydrogen bonds preserve the mechanical strength of the polyurethane material, whereas the breaking and rapid reformation of the weak hydrogen bonds support its self-healing ability. The experimental data show that PUGI-A 1 O 1 exhibits a high tensile strength of 49 MPa and a self-healing rate of 98% at 80°C for 12 h.
研究领域:
高分子材料
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功能材料
·
材料化学
·
纳米复合材料
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 30
·e52685
·
IF 3.057
Fei Yu,Hengyu Feng,Jinpeng Leng,Hongying Xue,Ziyi Zhong,Zhen Yan,Xudong Liu,Yu Liu,Linghan Xiao
In regard to the nonfatal harm self-healing of natural species, microcapsule-based polymeric materials for self-healing have been considered to be highly desirable in light of their ability to heal cracks in significant volumes, leaving the original chemical structures of polymers unchanged. Accordingly, this study sought to design a one-component photo-responsive self-healing polymer composite based on Bisphenol A epoxy acrylate resin @graphene oxide microcapsules (BAEA@GOMCs) that are capable of photo-absorption in order to reduce difficulties of processing and inhomogeneous distributions of the two components. Embedding of BAEA@GOMCs were carried out in waterborne epoxy matrix, and self-healing composite coatings were generated onto surfaces of hot-dip steel via galvanization. Upon incurring mechanical damage, solidification of the agents of photo-responsive healing and the flowing the cracks were achieved as the agents were exposed to light to achieve self-healing. In addition, the solidification within the unbroken microcapsules was maintained, and there were continuous no reactions. Given the simplicity of the proposed preparation, incorporating light-absorbing particles into the microcapsule shell can further broaden the application range of the aforementioned common materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2019
·Vol. 37
·期 7
·700-707
·
IF 2.804
Zhang Zhi-Fei,Yang Kun,Zhao Shu-Gao,Guo Lai-Na
To meet the increasing demand for safe, environmentally friendly and high-performance smart materials, self-healing rubbers are highly desired. Here, the self-healing performance of ethylene propylene diene monomer rubber (EPDM) is reported, which was designed by graft-polymerization of zinc dimethacrylate (ZDMA) onto rubber chains to form a reversible ionic cross-linked network. Single ionic cross-linked network and dual network, combining covalent and ionic cross-links, could be tuned by controlling vulcanization process to achieve tailorable mechanical and self-healing properties. It was found that ionic cross-linked EPDM showed a recovery of more than 95% of the original mechanical strength through a healing process of 1 h at 100 °C. The covalent cross-links could improve mechanical properties but block self-healing. Adding 50 wt% liquid rubber to “dry” EPDM could effectively enhance self-healing capability of the dual cross-linked network and the healed tensile strength could reach 0.9 MPa. A compromise between mechanical performance and healing capability could be potentially tailored by controlling vulcanization process and liquid rubber content.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）