Construction of self-healing materials with improved mechanical performance is a great challenge. A strong and tough self-healing composite is fabricated via in situ growth of zeolitic imidazole framework-8 (ZIF-8) nanocrystals in imidazole-containing polymer networks. By adjusting the stoichiometric ratio of the zinc salt to 2-methylimidazole, composites with various mechanical performances are obtained. The existence of ZIF-8 nanocrystals via in situ growth in the polymer networks is confirmed by X-ray diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM). The zinc-imidazole interactions between the ZIF-8 nanocrystals and the polymer are confirmed by attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. The composites can repair themselves under mild conditions owing to dynamic zinc-imidazole interactions. The self-healing efficiency of composites can reach up to 91% under the condition of 60 °C for 48 h. In contrast to the pure zinc cation crosslinking system, the composite containing ZIF-8 nanocrystals prepared via in situ growth exhibited enhanced tensile strength and toughness by 43% and 100%, respectively. This study proves that incorporating the metal-organic frameworks (MOFs) materials into a self-healing system via an in situ growth strategy is highly promising for designing self-healing materials with improved mechanical performance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/marc.202400333 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Ultrafine metal-organic framework @ graphitic carbon with MoS-CNTs nanocomposites as carbon-based electrochemical sensor for ultrasensitive detection of catechin in beverages.
Mikrochim Acta
December 2024
Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, People's Republic of China.
GO/Co-MOF/PPy-350 (GPC-350) was synthesized by in situ growth of ultrafine Co-MOF on graphene oxide (GO), followed by encapsulation with polypyrrole (PPy) and calcination at 350.0℃. Meanwhile, MoS-MWCNTs (MoS-CNTs) were produced via the in situ synthesis of MoS within multi-walled carbon nanotubes (MWCNTs).
View Article and Find Full Text PDFIn Situ Growth of Covalent Organic Frameworks on Carbon Nanotubes for High-Performance Potassium-Ion Batteries.
Angew Chem Int Ed Engl
December 2024
City University of Hong Kong, Department of Physics and Materials Science, 83 Tat Chee Ave, Kowloon Tong, 999077, Hong Kong, HONG KONG.
Redox-active covalent organic frameworks (COFs) have been demonstrated as promising organic electrodes in many electrochemical devices. However, their inherently low conductivity significantly hinders the full utilization of their internal redox-active sites. To address this issue, a simple solvothermal method is used to in situ polymerize 2,4,6-triformylphloroglucinol (TP) and p-phenylenediamine (PA) on the surface of carbon nanotubes (CNTs), generating a nanocable-like COF-based nanocomposite, TpPa-COF@CNT nanocables, which contain abundant β-ketoenamine groups.
View Article and Find Full Text PDFPhenological and morphological variations of Oryza rufipogon and O. nivara in Sri Lanka and their evolutionary implications.
Sci Rep
December 2024
Institute of Botany State Key Laboratory of Systematic and Evolutionary Botany, Chinese Academy of Sciences, 100093, Beijing, China.
Phenological and morphological variation are widely viewed as a pivotal driver of ecological adaptation and speciation. Here, we investigate variation patterns of flowering phenology and morphological traits within and between O. rufipogon and O.
View Article and Find Full Text PDFNonporous TiO@C microsphere with a highly integrated structure for high volumetric lithium storage and enhance initial coulombic efficiency.
Sci Rep
December 2024
Shandong Engineering Research Center of Green and High-value Marine Fine Chemical, Weifang University of Science and Technology, Shouguang, 262700, People's Republic of China.
To enhance the volumetric energy density and initial coulombic efficiency (ICE) of titanium oxide (TiO) as anode electrode material for lithium-ion batteries (LIB), this study employed a surface-confined in-situ inter-growth mechanism to prepare a TiO embedded carbon microsphere composite. The results revealed that the composite exhibited a highly integrated structure of TiO with oxygen vacancies and carbon, along with an exceptionally small specific surface area of 11.52 m/g.
View Article and Find Full Text PDFIn situ production and precise release of bioactive GM-CSF and siRNA by engineered bacteria for macrophage reprogramming in cancer immunotherapy.
Biomaterials
December 2024
School of Life Sciences, Faculty of Medicine, Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology, Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, Tianjin University, Tianjin, 300072, China.
In the immunosuppressive tumor microenvironment (TME), tumor-associated macrophages (TAMs) predominantly exhibit an immunosuppressive M2 phenotype, which facilitates tumor proliferation and metastasis. Although current strategies aimed at reprogramming TAMs hold promise, their sustainability and effectiveness are limited due to repeated injections. Herein, a bacterial therapy platform containing two engineered strains was developed.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!