COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Jun-Kuo Wang,Qiong Zhou,Jun-Peng Wang,Shuo Yang,Guo Liang Li
The development of multifunctional nanocontainers for self-healing coatings is of great interest for environmental and healthcare applications. In this study, we developed a synthetic strategy for a hydrophobic and self-healing anticorrosion coating from carboxylic acid- and fluorine-containing nanocontainers. Initially, well-defined poly (acrylic acid- co -trifluoroethyl methacrylate) microspheres were synthesized with different crosslinking agents by precipitation polymerization. The carboxylic acid groups allow for pH-responsive function to control the release of the encapsulated healing inhibitor to the cracks of polymer coatings on metal surfaces . The fluorinated groups of the polymer nanocontainers can endow the coatings with hydrophobicity . The as-synthesized multifunctional nanocontainers were further doped into the polymer coatings to generate self-healing coatings. The self-healing polymer coatings exhibited good crack inhibition since the inhibitor benzotriazole in pH-responsive nanocontainers can autonomously form new nanobarriers on metal surfaces around cracks after corrosion occurs. Furthermore, due to the micro/nanostructures of hydrophobic microspheres in the polymer coatings, the self-healing coating also exhibited good water resistance. The hydrophobic self-healing polymer coatings from the as-synthesized carboxylic acid- and fluorine-containing nanocontainers for anticorrosion were analyzed by electrochemical impedance spectroscopy (EIS).
研究领域:
材料科学
·
环境科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Qianqian Kang,Wei Wang,Tong Wang,Zhipeng Mao,Wen Li,Peng Wang,Shougang Chen
Herein, we develop a novel composite coating with excellent self-healing and anticorrosion properties activated by photothermal responsive hollow core-shell nanofillers. A photothermal heterojunction Co 9 S 8 @Bi 2 S 3 was prepared and integrated into polyurethane containing disulfide bonds. It is found that the heterojunction has enhanced the light absorption capacity and has increased the number and lifetime of photogenerated electron-hole pairs, making more photogenerated charges pass through the heterojunction interface by reducing interface transfer resistance and releasing heat as well. Under 808 nm near-infrared light irradiation, the photothermal effect of Co 9 S 8 @Bi 2 S 3 can trigger the reconstruction of dynamic disulfide bonds and reversible hydrogen bonds simultaneously to heal coating scratches. The surface characterization and electrochemical test results manifest that the coating containing 2 wt% 10 %-Co 9 S 8 @Bi 2 S 3 nanofillers displayed excellent self-healing and anti-corrosive capabilities. The self-healing efficiency of nearly 90 % was achieved after five-time cutting-healing cycles on the coating. The protection performance of the initial immersion stage could be restored by nearly 100 % after five-time self-healing, and the low-frequency impedance modulus was above 10 8 Ω cm 2 even after 60 days of immersion. This work would provide a new tactic for developing multi-cycle self-healing coatings triggered by photothermal effects.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2018
·Vol. 15
·期 3
·571-581
·
IF 1.619
Li Yan,Cai Shu,Shen Sibo,Xu Guohua,Zhang Feiyang,Wang Fengwu
In order to improve the corrosion resistance of a biodegradable magnesium alloy, a series of phytic acid/3-aminopropyltrimethoxysilane (γ-APS) hybrid coatings was prepared on AZ31 magnesium alloys by dipping the magnesium alloy into the mixing solution of phytic acid and γ-APS. During the preparation of hybrid coatings, the pH values of the mixing solutions greatly affected the uniformity of the coatings and subsequently influenced their corrosion resistance. Electrochemical tests indicated that the hybrid coating prepared in the solution of pH = 8.0 could highly improve corrosion resistance of AZ31 magnesium alloys. Meanwhile, corrosion current density of the hybrid coating coated sample was significantly decreased from the uncoated sample of 138.1 ± 11.9 to 8.5 ± 0.8 μA cm −2 . Immersion test in simulated body fluid revealed that the cracks on the surface of the hybrid coating gradually healed up during the lengthy immersion.
研究领域:
生物医学工程
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材料科学
·
表面工程
·
腐蚀与防护
·
生物可降解材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jinsong Wang,Huining Xiao,Haijiao Xie,Yang Huang,Farzad Seidi
Green self-healing coatings, particularly lignin-based coatings, represent a breakthrough solution for sustainable metal protection and serve as a promising alternative to traditional petroleum-derived coatings. However, the practical application of pure lignin coatings is limited by their inherent structural rigidity and low hydrophobicity. To address these challenges, a series of lignin-based hydrophobic self-healing coatings were developed by functionalizing lignin with methacrylate groups, conjugating it with corrosion inhibitors, and subsequently polymerizing it with bis(2-methylacrylyl) oxyethyldisulfide (BMOD) and hydrophobic monomers. Through a systematic optimization, we achieved a contact angle of 115° and an E corr of -20 mV for a coating with thickness ~ 19 μm. Notably, this coating reduces the corrosion rate (CR) by over 6000 times compared to bare steel. Additionally, the coating is able to restore its microcracks under mild conditions through a combination of the gradual release of corrosion inhibitors and reversible disulfide bonds, achieving a healing efficiency of 83.3 % within 72 h. The combination of excellent hydrophobicity, self-healing capability, and corrosion resistance represents a significant advancement in environmentally friendly, durable coatings with extensive industrial applications.
研究领域:
材料科学
·
可持续化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2024
·Vol. 14
·期 4
·410
·
IF 2.9
Huaixuan Mu,Yiqing Deng,Wangcai Zou,Xiandi Yang,Qiang Zhao
Dual microcapsule systems, especially those based on the polyurea matrix, have emerged as pivotal components driving innovation in self-healing materials, thanks to the intrinsic properties of polyurea, primarily diamine and diisocyanate, rendering it an optimal choice for enhancing self-healing coatings. However, the encapsulation of polyurea components is fraught with substantial technical hurdles. Addressing these challenges, a novel methodology has been devised, leveraging n-heptane as a solvent in the liquid diamine emulsion process to facilitate the synthesis of diamine microcapsules. These microcapsules exhibit a uniform spherical morphology and a robust shell structure, with an encapsulated core material ratio reaching 39.69%. Analogously, the encapsulation process for diisocyanate has been refined, achieving a core material percentage of 10.05 wt. %. The integration of this bifunctional microcapsule system into diverse polymeric matrices, including epoxy resins and polyurethanes, has been demonstrated to significantly enhance the self-healing efficacy of the resultant coatings. Empirical validation through a series of tests, encompassing scratch, abrasion, and saltwater immersion assays, has revealed self-healing efficiencies of 21.8% and 33.3%, respectively. These results indicate significant improvements in the durability and self-repair capability of coatings, marking a notable advancement in self-healing materials with promising potential for tailored applications in automotive, aerospace, and construction industries.
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 Applied Polymer Materials
·
2024
·
IF 4.4
Xuanlin Qiu,Chuanpeng Li,Yuchen Sun,Yu Liu,Xingwei Wang,Shuang Sun,Qiangliang Yu,Bo Yu,Meirong Cai,Feng Zhou
Further exploration of MXene’s potential in self-healing materials is promising, given its exceptional surface properties and adaptability to various modifications. In this study, the surface of MXene was functionalized with 2,5-diaminobenzenesulfonic acid (2,5-DBSFA) and 1-{3-[(N-n-butyl) aminoformamido] propyl}-3-cetyl imidazolium bromide (M16) successively, resulting in the successful preparation of functionalized MXene (f-MXene). It was added as an anticorrosion and wear-resistant filler to the self-healing epoxy resin coating with dynamic disulfide bonds, and the corrosion and friction behaviors of the coating were explored. Under heating at 170 °C for 10 min, the self-healing performance of the EP coating was significantly improved, with |Z|0.01Hz increasing from 6.77 × 106 to 1.54 × 108 Ω·cm2. This significant increase indicates that functionalized MXene can act as an effective repair agent in the EP matrix, working together with dynamic disulfide bonds to promote self-healing of microcracks or damage. Moreover, the tribological test results indicate that the addition of f-MXene not only enhances the self-healing ability but also improves the coating’s tribological properties. The introduction of f-MXene into the EP coating results in improved resistance to wear and friction, in which the average coefficient of friction decreased from 0.53 to 0.33 and wear rate has decreased 53.3%. This is attributed to the excellent mechanical and chemical properties of MXene, which can improve the stress distribution of the coating and form a self-lubricating film during friction.
研究领域:
材料科学
·
表面工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Mustehsin Ali,Hongwei Shi,Faheem Jan,Sharjeel Ahmed,Yingwei Song,En-Hou Han
Ti 3 C 2 T x nanosheets, emerging as revolutionary 2D nanomaterials, have sparked interest in advanced applications due to their thin-layered architecture and promise as innovative nanofillers for a variety of applications. To address the oxidation and stacking of Ti 3 C 2 T x nanosheets with the polymer, a novel multifunctional Ti 3 C 2 T x -based nanocomposite is engineered by an etching method. The Ti 3 C 2 T x surface is functionalized with 3-aminopropyltriethoxysilane (APTES), and attapulgite (ATP) is implanted on the NH 2 -Ti 3 C 2 T x interface to lower the cohesive energy between nanosheets. The novel self-healing epoxy films were achieved by encapsulating self-healing components ((8-hydroxyquinoline (8-HQ) + 2-mercaptobenzothiazole (MBT)) in the ATP-based NH 2 -Ti 3 C 2 T x nanocomposite (AMQM). Inhibited AA2024-T3 surface revealed hydrophobic nature, whereas the pH sensitive coatings exhibited strong adherence to the substrate and improved compatibility and mechanical strength. The impedance of artificially scratched epoxy film rose from 0.073 M Ω cm 2 to 0.198 M Ω cm 2 (after 12 h) and from 0.027 M Ω cm 2 to 2.189 M Ω cm 2 (after 96 h) in comparison with the control samples. Simulations depict the presence of hydrogen bonds between the inhibitors and the 2024-T3 alloy, as well as twice the adsorption energy compared to the individual inhibitors. Therefore, a novel pH-sensitive self-healing coating offers a synergistic approach for promising corrosion suppression.
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 Applied Polymer Materials
·
2024
·
IF 4.4
Wanqin Gong,Jun Cheng,Dandan Pi,Chao Gao,Hantao Zou,Xueting Liu,Jincai Rao,Fushan Nie
The self-warning and thermal-induced self-healing microcapsules were fabricated by the interfacial in situ polymerization process, which consists of SiO2 as the shell material and epoxy resin, a thermal initiator, and a fluorescent agent as the core materials. The squeegee coating method was used to prepare the self-healing self-warning PVC-coated fabric. The microcapsules have a core–shell structure with an average particle size of 1.5 μm and a high sphericity with a coverage rate of 77% and excellent thermal stability below 320 °C. The PVC coating agent has good wettability with the microcapsules with a contact angle of 34.6 ± 0.9°. When cracks appear on the surface of the coated fabric containing microcapsules, the fluorescent agent and repair agent (epoxy resin and thermal initiator) will then flow out from the broken microcapsules and fill the cracks owing to the great wettability of the PVC coating agent with a contact angle of 44.2 ± 1.1°. Under UV light, the cut displays a yellow fluorescence line, indicating the location of the damage. After filling the cracks, the epoxy resin polymerizes with the thermal initiator at 120 °C. When the heating time reaches 6 h, the cuts in the fabric are healed, and the strength of the coated fabric reaches 699 N, thereby matching the original strength of 713 N before cutting.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuye Zhu,Min Chen,Limin Wu
Polymeric coatings are usually threatened by some harsh environment factors, which induce the formation of cracks or loss of functional components. Traditional extrinsic self-healing coatings usually have only one single repair mode (crack-repairing or function-restoring mode) that may not be powerful enough to meet the complex repair needs in practical applications. Herein, we first report a UV-responsive, dual-functional, fully-utilized microsphere-based system for highly efficient self-healing coatings, in which the UV-reversible coumarin crosslinking shells can not only encapsulate and release functional compounds as the function-repairing agents, but also participate in self-healing process as the crack-repairing agents, thus realizing two modes of repair with 100% of utilization efficiency of microspheres.
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
Sustainable Materials and Technologies
·
2023
·
IF 9.6
Taoyan Mao,Hao Feng,Junrong Wu,Min Li,Su Luo,Jiale Chen,Xingchuan Wei,Peng Liu,Fengwei Xie
While superhydrophobic coatings have been widely used for surface modification and protection, most suffer from relatively short service life due to the lack of self-healing mechanisms. Herein, a new self-healable coating formulation based on waterborne organic silicone polyurethane has been proposed by integrating disulfide groups into polyurethane molecules. The bulk polyurethane material with disulfide groups shows high self-healing efficiency of up to 90.8%. The polyurethane coating on cotton fabric showed high superhydrophobic performance even after severe damage. Furthermore, the coating showed excellent self-healing ability. The damaged surface could self-heal after heating at 80 °C for half an hour. The coating also exhibited excellent superhydrophobicity and extremely high oil/water-separation efficiency, even after experiencing 80 washes or being worn 800 times. The combination of superior self-healing ability and superhydrophobic properties of the waterborne organic silicone polyurethane coating provides a general approach for the long-term application of such coatings in harsh environments.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Wenyan Zhou,Tong Wang,Yanan Pu,Lin Cao,Wen Li,Jiaxin Huang,Huimeng Feng,Shougang Chen
The research on intelligent corrosion inhibition and repair protective coatings is currently underway, with a particular focus on the intricate microstructure failure process of these coatings due to the inherent complexity of their fillers (functionality, interfacial compatibility, etc.). Herein, we developed corrosion inhibition nanocontainers with enhanced photothermal and pH-responsive properties. The incorporation of chitosan facilitated the acidic environment responsiveness of the nanocontainers, while MoS 2 nanocontainers enabled light-triggered release. The electrochemical results show that after 60 days, the impedance modulus of epoxy coating with 1 % nanocontainers is 4.35 × 10 8 Ω·cm 2 , while that of pure epoxy coating is 2.09 × 10 6 Ω·cm 2 . And it can achieve 300 h of salt spray resistance. In addition, the mechanical properties show that the adhesion and tensile properties of the coating are improved, and the saturated water absorption of the coating is decreased. In addition, the evolution of its electrochemical structure was comprehensively studied using relaxation time analysis. The research results indicate that the coating exhibits multiple electrochemical processes, and the controlled release and formation of a protective layer effectively hinder the formation of corrosion products and reduce internal electrochemical reactions. This study provides a potential method for studying the structural evolution of composite coatings.
研究领域:
材料科学
·
电化学
·
防腐蚀工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Tong Liu,Dawei Zhang,Rongjun Zhang,Jinke Wang,Lingwei Ma,Patrick Keil,Arjan Mol,Xiaogang Li
Organic coatings are one of the most used and versatile technologies to mitigate corrosion of metals. However, organic coatings are susceptible to defects and damages that may not be easily detected. If not repaired timely, these defects may develop into major coating failures due to corrosion occurring in the damaged region, thereby limiting the lifetime of the to be protected structure. Thus, the development of smart coatings that can accurately identify corrosion location and reliably recover the damage autonomously is of particular interest. Herein, we reported a robust, corrosion-sensing and self-healing coating which incorporated pH-sensitive ZIF-8-capped CaCO 3 microcontainers containing the healing agent tung oil (TO) and the corrosion indicator/inhibitor 1,10-phenanthrolin-5-amine (APhen). The spontaneous leakage of incorporated TO and APhen was restrained, and the release initiated when local pH variation occurred. The corrosion protection performance of the coatings implanted with different contents of smart microcontainers were evaluated. The intact epoxy coating containing 7.5 wt% of the microcontainers exhibited the best protection performance with low water absorption (0.65 wt%), low O 2 permeability (0.21 × 10 –15 cm 3 cm cm −2 s −1 Pa −1 ), and a high storage modulus (3.0 GPa). Electrochemical impedance spectroscopy (EIS) measurements in 3.5 wt% NaCl solution demonstrated superior durability of the composite coating after self-healing. The immersion test and neutral salt spray test confirmed the coating can accurately report corrosion sites via coloration.
研究领域:
材料科学
·
腐蚀防护
·
智能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）