PROGRESS IN ORGANIC COATINGS
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2023
·
IF 6.6
Weibin Bai,Xu Zhang,Zhencheng He,Yao Qian,Rongkun Jian,Yucai Lin,Yanlian Xu
The incalculable metal corrosion loss makes the research of long-term corrosion resistant coatings attract much attention. Herein, we demonstrated a new strategy for constructing a pH-responsive nanocontainer as a gatekeeper, which consisted of a laminated double hydroxide (LDH) surface in situ grown ZIF-8 containing the corrosion inhibitor of 2-mercaptobenzimidazole (MBM). The shell-core structures of the composite fillers displayed the excellent barrier performance and pH-responsive controlled release properties in epoxy (EP) coatings. Electrochemical impedance spectroscopy and salt spray tests were conducted to investigate the multifunctional role in providing an intelligent anti-corrosion MBM@ZIF-8@LDH/EP composite coating . After immersing in salt solution (3.5 wt%) for 30 days, the impedance value of the MBM@ZIF-8@LDH/EP coating at 0.01 Hz (|Z| 0.01 Hz ) was 2.82 × 10 8 Ω∙cm 2 , which was about four orders of magnitude higher than that of the epoxy coating (1.54 × 10 4 Ω∙cm 2 ). The outstanding corrosion protection of MBM@ZIF-8@LDH was attributed to not only the compactness improvement of the composite coating, but also the anion exchange capability to act as a storage station for chloride ions. Meanwhile, the active filler could be used as a pH-responsive nanocontainer to release the loaded corrosion inhibitor of MBM and prevented further damage to the steel substrate, displaying a self-healing behavior. This strategy provides a new idea to combine perfect barrier effect and active anti-corrosion performance to prepare high-performance anti-corrosion and self-healing coatings. The multi-protective smart anti-corrosive coating would be a candidate with excellent performance for use in a variety of fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Smart Materials and Structures
·
2017
·Vol. 26
·期 9
·095010
·
IF 2.909
Chunyu Wang,Yuhuan Bu,Letian Zhao
This paper concerns the properties and self-healing behavior of cement composites modified by oil absorbent microspheres with fumed silica shell. These microspheres, prepared by Pickering polymerization, possessed excellent properties, such as uniform particle size, good hydrophilicity and fine thermal stability. Furthermore, the effect of these microspheres on the properties of cement slurry was studied. The results showed that these microspheres had good compatibility with cement slurry, except for a slight effect on the consistency of cement slurry and the compressive strength of cement stone. At last, we derived the mathematical formulation of valid sealing for microcracks in self-healing cement, and measured sealing pressure under different filling conditions. The self-healing cement would guarantee the health, safety and high efficiency in the process of oil and gas production.
研究领域:
土木工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Fuzhen Li,Ruixue Sun,Kezheng Chen
In this work, the anodized coating was firstly prepared at low voltage on AZ31B Mg alloy , and followed by one-step hydrothermal treatment to produce stearic acid modified CeO 2 coating with superhydrophobic performance. The anodized coating prepared at low voltage combined well with the substrate without obvious micropores and microcracks . The outer stearic acid modified CeO 2 coating with spherical morphology covered the inner anodized coating compactly. The composite coating showed excellent superhydrophobicity (CA=164.7º) and self-cleaning performance. Meanwhile, the corrosion resistance of the substrate coated with the composite coating had been significantly improved. When the composite coating is scratched, the Ce ions might gradually release from the coating and convert into newly formed Ce-based compounds to prevent the further corrosion, exhibiting a self-healing behavior.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Dongdong Gao,Wenxiang Zhu,Jinxin Chen,Keyang Qin,Mengjie Ma,Jie Shi,Qun Wang,Zhenglong Fan,Qi Shao,Fan Liao,Mingwang Shao,Zhenhui Kang
The irreversible leaching of metal atoms during the alkaline oxygen evolution reaction (OER) process greatly hinders the long-term stability of OER catalysts. Self-healing is a promising strategy to address this problem while constructing the highly effective self-healing catalytic system is still challenging. Here, we explore a simple approach by incorporating high-valence metals of molybdenum (Mo) and tungsten (W) into a cobalt–iron (Co–Fe)-based oxide modulator. A high-entropy layered oxide catalyst, FeCoMoW, is synthesized using a molten-alkali method. The FeCoMoW catalyst exhibits self-healing capabilities, as demonstrated in the chronoamperometric tests at a high potential. It even shows a reduction of overpotential in a borate buffer (KBi, pH = 14) containing Co2+ undergoing a 100 h long-term stability test or enduring 5000 cycles of cyclic voltammetry test. Importantly, the presence of high-valence metals in the high-entropy materials is found to be essential for self-healing behavior, and the two-dimensional morphology of catalysts is conducive to the catalytic performance. This work introduces a feasible strategy to design cost-effective and robust catalysts with self-healing properties, thereby paving the way for more OER applications.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 37
·2101326
·
IF 13.281
Chao Zheng,Jun Zhang,Yang Xia,Hui Huang,Yongping Gan,Chu Liang,Xinping He,Xinyong Tao,Wenkui Zhang
Argyrodite Li 6 PS 5 Cl with high Li + conductivity is a promising material for solid-state electrolytes (SSEs) in all-solid-state lithium batteries (ASSLBs). However, the narrow electrochemical window of Li 6 PS 5 Cl limits its applications in ASSLBs with high energy densities, and those that consist of high-voltage cathode materials and metallic lithium anodes. Unstable lithium deposition and stripping at interfaces is also a factor that restricts its industrialization. Herein, the authors investigated the electrochemical stability of Li 6 PS 5 Cl using it as both the cathode and electrolyte. The Li 6 PS 5 Cl-C/Li 6 PS 5 Cl/Li cell and symmetric Li/Li 6 PS 5 Cl/Li cells failed after a certain number of cycles, and subsequently healed electrochemically. This failure/healing phenomenon recurred during the cycling process. The self-healing behavior is closely related to the electrochemical window, which suggests that it can be controlled by the charge–discharge voltage range. In-depth X-ray photoelectron spectroscopy, in situ Raman spectroscopy, and in situ electrochemical impedance spectroscopy revealed the reversible Li 6 PS 5 Cl decomposition and metallic lithium growth inside the electrolyte during the cycling process. This self-healing behavior is mainly attributed to the reciprocating lithium growth and reversible redox reaction of the Li 6 PS 5 Cl decomposition. The proposed self-healing mechanism is a key aspect for sulfide-based SSEs, guiding the interface modification, and material design of ASSLBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Chang Xu,Shiqiang Guan,Hao Zhang,Weiwang Fan,Xijing Zhuang,Xufeng Dong
Hydrogels are promising candidates for flexible wearable technology, biomedicine, and even brain–computer interfaces (BCI). However, the mismatch in the mechanical properties and high biotoxicity of the materials cast a shadow on their application prospects. Herein, we developed a multifunctional hydrogel matrix primarily based on the natural polymer gelatin. Multilevel hybrid dynamic crosslinking (MHC) enables the adjustment of the hydrogel molecular network and endows the material with satisfactory mechanical properties and self-healing behavior. The excellent biocompatibility of the hydrogel is enough to support the growth and proliferation of cells while avoiding tissue rejection or inflammation. Moreover, the excellent self-adhesive performance allows the hydrogel to directly adhere to the surface of human skin and tissues, enabling real-time monitoring of body movements and non-invasive sensing of electroencephalogram (EEG) signals. Therefore, the multifunctional hydrogel matrix with self-adhesive behavior, self-healing properties, appropriate mechanical performance, and excellent biocompatibility can be regarded as a promising platform for applications in flexible wearable devices, biomedical materials, and BCI devices.
研究领域:
材料科学
·
生物材料
·
生物医学工程
·
可穿戴技术
·
神经科学
✓ 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）