ACS Nano
·
2020
·
IF 14.588
Quanquan Guo,Xinxing Zhang,Fengyuan Zhao,Quancheng Song,Gehong Su,Yuxiang Tan,Qingchuan Tao,Tao Zhou,Yanmei Yu,Zehang Zhou,Canhui Lu
Progress toward the integration of electronic sensors with a signal processing system is important for artificial intelligent and smart robotics. It demands mechanically robust, highly sensitive, and self-healable sensing materials which could generate discernible electric variations responding to external stimuli. Here, inspired by the supramolecular interactions of amino acid residues in proteins, we report a self-healable nanostructured Ti3C2MXenes/rubber-based supramolecular elastomer (NMSE) for intelligent sensing. MXene nanoflakes modified with serine through an esterification reaction assemble with an elastomer matrix, constructing delicate dynamic supramolecular hydrogen bonding interfaces. NMSE features desirable recovered toughness (12.34 MJ/m3) and excellent self-healing performance (∼100%) at room temperature. The NMSE-based sensor with high gauge factor (107.43), low strain detection limit (0.1%), and fast responding time (50 ms) can precisely detect subtle human motions (including speech, facial expression, pulse, and heartbeat) and moisture variations even after cut/healing processes. Moreover, NMSE-based sensors integrated with a complete signal process system show great feasibility for speech-controlled motions, which demonstrates promising potential in future wearable electronics and soft intelligent robotics.
研究领域:
材料科学
·
生物仿生学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 4
·1-11
·
IF 2.8
Liang Miaoqing,Guan Fanglan,Zhang Mei,Nie Jinmei,Bao Lihong
Self-healing materials have gained significant attention due to their ability to autonomously repair damage, extending material lifespan. In this study, bio-based self-healing polyurethanes were synthesized using modified castor oil (MCO) as the soft segment and 5-(2-hydroxyethyl)- 6-methyl- 2-aminouracil (UPY) and 2,2'-diaminodiphenyldisulfide (DTDA) as dynamic components. The synergistic effect of quadruple hydrogen bonding and disulfide bonds was investigated by varying the n(UPY)/n(DTDA) ratio. Structural and mechanical properties were characterized using IR, DSC, TGA, XRD, and tensile testing. The results revealed that the castor oil-based polyurethanes exhibited transparency and amorphous structures, making them promising bio-based self-healing materials. When the DTDA content was 9.54% and the UPY content was 1.62%, the material achieved a self-healing efficiency of 96.38% under 80 °C for 12 h. Additionally, at a DTDA content of 6.65% and a UPY content of 2.43%, the tensile strength reached 17.76 MPa. Mechanistic analysis revealed that disulfide bonds played a dominant role in self-healing, while hydrogen bonds provided additional reinforcement. This work presents a novel bio-based polyurethane system with tunable mechanical and self-healing properties, contributing to the development of sustainable smart materials.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Ning Yu,Bingxu Cheng,Yang Liu,Wei Wu,Robert K. Y. Li,Zihui Liang,Fangchao Cheng,Hui Zhao
The development of self-healing materials provides a new opportunity and challenge for advancing triboelectric nanogenerators (TENGs). However, the low strength and low toughness of self-healing triboelectric materials often result in the deformation or breakage of TENG under high mechanical loads, thereby limiting their potential applications. Herein, a new strategy for fabricating self-healing triboelectric materials is reported, which introduces cross-linking networks with hydrogen bonds and metal coordination bonds. The desired high performance can be achieved by simply adjusting the molar ratio of the metal to the ligand. When the molar ratio is 1:2, the tensile strength, toughness, and elongation at break of the material reached 13.7 MPa, 76.9 MJ m −3 , and 1321%, respectively. Furthermore, its self-healing efficiency can reach 74% at 70 °C in 6 h. Working in contact-separation mode, the electrical output can reach 164 V, 18.2 µA, 57.5 nC, with a maximum power density of 2.54 W m −2 . Notably, even if it is sheared, the electrical output performances of TENG can be completely recovered to the original state. In addition, the developed TENG exhibits excellent output stability over 10 000 contact separation cycles. This study presents a promising approach for the development of stretchable smart generators.
研究领域:
材料科学
·
纳米技术
·
能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 35
·e54350
·
IF 3
Rui Wang,Fei Yu,Hengyu Feng,Zhen Yan,Linghan Xiao,Wei Zhu
The use of microencapsulated self-healing materials has been widely applied in many fields, while factors (e.g., the size and content of the microcapsules) markedly affect the mechanical properties of the self-healing material. In this study, an epoxy-amine microencapsulated self-healing material was developed through Pickering emulsion to reduce the effects of the above-mentioned factors. In this study, the Pickering emulsion was stabilized using two two-dimensional (2D) materials (i.e., GO and BN), and epoxy microcapsules and amine microcapsules were prepared, with average size of 3.62 and 4.63 μm, respectively. FTIR spectroscopy was used to identify the presence of characteristic PU peaks in the microcapsules, and the bilayer shell microcapsules were well-prepared. To prepare the binary epoxy resin self-healing material, two microcapsules were added to the epoxy resin matrix and its mechanical properties were analyzed. Based on the test results, it was suggested that the addition of microcapsules in this study slightly affected the mechanical properties of the material, and the binary self-healing material still exhibited 89% of the bending stress below the 10 wt% content of the microcapsules. In addition, the tensile stress after repair was 148% of that before. These materials have promising applications in many areas (e.g., engineering technology).
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
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 10
·1-13
·
IF 2.426
Jia Han,Gu Shu-Ying
Due to the damages caused during deformation of flexible electronic materials, the development of self-healing flexible electronic materials has received great attention. A self-healing flexible polyurethane nanocomposite obtained by the incorporation of carbon nanotubes (CNTs) is reported. The structure and self-healing properties of the nanocomposite were investigated by thermal analysis, tensile test and observation of surface morphology. After the introduction of CNTs, the tensile strength at break was improved from 1.45 MPa to 2.99 MPa as the loading content of CNTs was 5 wt%. The elongation at break decreased but still remained above 100%, indicating the composite was flexible enough for flexible and wearable electronics. Due to the photo-thermal effect of CNTs, the self-healing of the nanocomposite could be induced precisely, remotely and efficiently under irradiation of near infrared (NIR) laser without influencing the undamaged areas. The healing efficiency of the composite containing 3 wt% CNTs reached 90.1%. Besides, the nanocomposite could assist the recovery of the conductive layer coated on its surface under irradiation. Therefore, the polyurethane nanocomposite could be safely utilized as the flexible substrate for conductive layer of flexible electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2021
·
IF 4.43
Jinchuang Rong,Jiang Zhong,Wanlong Yan,Maochen Liu,Yalei Zhang,Yongluo Qiao,Changqing Fu,Fei Gao,Liang Shen,Haifeng He
The novel self-healable waterborne polyurethanes (WPU) with the synergistic reversible units of aliphatic disulfide bonds and quadruple hydrogen bonding have been successfully prepared. The ureidopyrimidone (UPy) functional motifs were introduced into polymer backbones of polyurethane, where also placed the reversible disulfide bonds. The quadruple hydrogen bonds of UPy groups endowed the material a strong physical cross-linking network, which provided a superior Young's moduli . The features of dual dynamic structure could also produce a relatively low active energy of 36.1 kJ/mol, resulting in a good self-repairing efficiency of 94% under a mild condition. Furthermore, the influence of self-healing time and different repairing temperature on the healed performance was also systematically investigated. In order to describe the self-healing progress of multiple dynamic units, a physical model was used to study the evolution of self-repairing efficiency with variable healing time, indicating that quadruple H-bonding and disulfide bonds predominantly supported time dependent reconstruction of physically crosslinking network to recover the original mechanical property.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Chao Li,Chihamo Jike,Yan Song,Guo Liang Li,Yi Jia,Junbai Li
Materials with cascade-responsive self-healing similar to that of living organisms can be of great practical value. Herein, a synthetic polymeric material is demonstrated that can achieve cascade-responsive self-healing via a mechanical-force-triggered self-crosslinking reaction. Ferrocene (Fc) is used as a mechanophore, and its decomposition when the material is subjected to a mechanical force generates Fe 3+ , which forms a complex with catechol residues present in side chains; thus, forming a new network structure. This cross-linking results in the tensile strength of CRSP-3 recovered completely after compression at 50 MPa for 5 min and standing for 72 h at room temperature. This strategy also provides the material with self-strengthening ability under repeated mechanical loading. The material exhibits the ability to resist the diffusion of micro cracks caused by high pressure in seawater. This study provides design principles for the construction of a new generation of intelligent bio-like self-healing materials.
研究领域:
材料科学
·
化学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2020
·Vol. 69
·期 9
·876-882
·
IF 2.574
Shaobin Xu,Dekun Sheng,Yan Zhou,Haohao Wu,Haopu Xie,Xiangdong Liu,Yuming Yang
Most self-healing materials based on noncovalent bonding suffer from poor mechanical performance, which largely limits their further application. Herein, we designed and synthesized robust and healable polymers that can be healed under heating. They consist of a linear and three-arm branched polyurethane mixture with triazole ligand end groups that are noncovalently linked through Fe–triazole interaction. The three-arm branched polyurethane in the polymer mixture would imply parts of Fe-triazole coordination bonds were replaced by covalent bonds and, as a consequence, yield materials with improved mechanical properties. Additionally, the mechanical properties of resulting polymers can be tuned by the number of Fe–triazole supramolecular crosslinks. Due to the dynamic nature of Fe–triazole interaction, all the metallopolymers exhibit excellent healable efficiency (over 90%) based on toughness. © 2020 Society of Chemical Industry
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 23
·1900340
·
IF 2.622
Yulong Wang,Yaqiong Li,Jingjing Bai,Zhenzhong Li,Guosheng Hu
The development of self-healing poly(urea-urethane)s with remarkable mechanical properties as well as self-healing capability is an important challenge through a low-cost approach. In this study, cystine dimethyl ester (CDE) is synthesized cost-effectively using cystine from bio-based sources as raw material, and a novel self-healing poly(urea-urethane) is successfully prepared using synthesized CDE as a disulfide-containing chain extender through a two-step approach. The as-prepared disulfide-containing poly(urea-urethane) (SPU) presents an excellent self-healing capability with self-healing efficiency of 95.3% at a moderate healing temperature (≈60 °C). Meanwhile, the SPU exhibits robust mechanical properties possessing a maximum tensile strength of 25.80 MPa and a high elongation at break of over 460% simultaneously. The compromise between self-healing capability and mechanical performance can be responsible for the exchange of dynamic disulfide bonds and the existence of quadruple hydrogen bonding. This strategy provides an available idea to develop robust self-healing polymer materials cost-effectively.
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
ACS Omega
·
2022
·
IF 4.132
Geonwoo Kim,Cigdem Caglayan,Gun Jin Yun
In this paper, catalyst-free room-temperature healing epoxy vitrimer-like materials (S-vitrimer) are introduced. The S-vitrimer can be healed at room temperature without any external stimuli such as solvent, pressure, heat, and catalyst through an aromatic disulfide exchange reaction and a hydrogen bond because the glass transition temperature of the S-vitrimer is lower than room temperature. Self-healing materials are attracting widespread attention nowadays with their potential to increase the durability of the materials. However, there is still elevating need for research, considering the limitations of various self-healing methods. To the best of our knowledge, epoxy-based catalyst-free room-temperature healing materials have not been investigated until now, yet they are promising to make self-healing easier. Moreover, the S-vitrimer showed higher healing efficiency when healed for a longer time and at a higher temperature. Especially when healed at room temperature for 96 h, the S-vitrimer presented an 80% healing efficiency. The S-vitrimer also showed an 80% healing efficiency when healed at 60 °C for 48 h. To investigate the factors affecting self-healing behavior, three control experiments were carried out. Control experiments showed that the S-vitrimer is healed mainly due to a disulfide exchange reaction, but hydrogen bonds also contribute to self-healing behavior. Also, it was found that tightly packed segments can hinder self-healing through control experiments.
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
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Yinlei Lin,Xinyan Song,Chenjing Zhu,Jianhui Huang,Xiaoxu Bai,Haichen Zhang,Kun Wang,Huawen Hu,Guangji Li
The self-healing properties of the material synthesized based on conventional isocyanate microcapsules as a healing agent are most likely degraded by the release of CO 2 during self-healing. Herein, we report the self-healing capability in a moisture environment of a particle-encapsulated isocyanate that is activated through the curing process involving an isocyanate agent. A novel isocyanate–oxazolidine compound loaded-spherical microcapsule, with a shell thickness of 10 μm and a median diameter of 151.4 μm, is first prepared via interfacial photoinitiated thiol-ene click chemistry in a stabilized aqueous emulsion. The encapsulation of the synthesized oxazolidine enables a significant improvement in the thermal stability of the microcapsules. Furthermore, the evaluation and analysis of the self-healing properties of the polyurethane coatings based on the isocyanate–oxazolidine-loaded microcapsules provide the evidence to elucidate the self-healing pathway on the molecular level. The oxazolidine preferentially undergoes a ring-opening reaction, yielding amino and hydroxyl compounds that further react with isocyanate to achieve autonomous self-healing in a moisture environment. This study opens up a route to develop isocyanate-encapsulated self-healing materials for practical applications.
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
Smart Materials and Structures
·
2023
·Vol. 32
·期 11
·115026
·
IF 4.1
Shaojun Chen,Zhenghe Ren,Ming Chen,Heng Chen,Haitao Zhuo,Haiqiang Zhong
Most self-healing materials have complex chemical structures and require cumbersome preparation processes, which seriously limit their large-scale application in the fields of electronic skins, wearable devices, biomedical applications and soft robotics. In this study, self-healing elastomers based on π–π stacking between imidazole groups were prepared by simpler and faster photo-polymerization with butyl acrylate (BA) and 1-vinyl imidazole (VIM), coded as BVn. Due to the imidazole groups in the side chains, the prepared elastomers had excellent self-repairing properties. After healing at 60 °C for 24 h, the strength and elongation at break of the repaired sample recovered to 97.2% and 95.4% of the original values, respectively. Importantly, the BVn based elastomers relied on π–π stacking interactions between imidazole groups rather than covalent crosslinks and could be recycled. These new self-repairing composite elastomers with high thermal stabilities, high elongations at break, good recoverabilites and high self-repairing efficiencies have great application potentials.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）