CARBON
·
2021
·
IF 9.594
Yawen Yang,Gaochuang Yang,Kaiming Hou,Honggang Wang,Na Wang,Shengrong Yang,Jinqing Wang
In this work, a novel lubricating additive was designed and synthesized via self-assembling of wrapped PTFE nanoparticles by exfoliated MXene nanosheets . Then the p MXene@polytetrafluoroethylene ( p MXene@PTFE) hybrid was introduced into epoxy coating and painted to substrate. The composite with PTFE would effectively alleviate the oxidation of MXene sheets. The research results show that the epoxy-based composite coating has excellent friction-reduction and wear-resistance properties in dry air, humid air (RH = 80%), and vacuum (3 × 10 −5 Mbar) environments, achieving multi-environmental stability binary composite coating. The performance improvement of composite coating mainly depends on the following points: (a) the lubricating synergistic effect of MXene sheets and PTFE hybrid additive with core-shell structure; (b) the good dispersibility and adhesion of composite additive in the epoxy matrix ; (c) the formation of protective film on the upper counterpart. The obtained friction results demonstrate that self-assembled p MXene@PTFE epoxy coatings greatly enhance the lubricating and anti-wear properties in multiple environments, establishing a promising platform for the design and application of novel high-performance additive with environmental insensitivity.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Guoqing Xiao,Zhengwei Yang,Chunlin Chen,Chunyan Chen,Fei Zhong,Mingtan Wang,Rui Zou
An effective method to enhance the flame retardant capability of intumescent fire retardant (IFR) coatings by constructed a two-dimensional/two-dimensional (2D/2D) hybrid with good composition and microstructure. Herein, g-C 3 N 4 @PDA (CNP) was firstly obtained by loading graphite phase carbon nitride (g-C 3 N 4 ) with bio-inspired polydopamine (PDA). Subsequently, a novel CNP@Mo hybrids was successfully prepared by loading molybdenum disulfide onto the CNP surface via a simple one-step hydrothermal method . Then, the obtained CNP@Mo was added to the IFR coating as a synergist to improve the flame resistance. Results indicated that the addition of 2 wt% CNP@Mo to the coating effectively accelerated the formation of the char layer and reinforced its thermal insulation properties. The CNP@Mo/EP sample exhibited the lowest backside temperature (179.6 ℃), the highest expansion ratio (10.53) and the most residual char (30.7%) by fire performance test, furnace test and TGA test. The combustion performance of the IFR coatings was investigated by cone calorimeter , and the results showed that the CNP@Mo hybrids based composite coating exhibited the lowest heat release rate (HRR), total heat release rate (THR), and total smoke production value (TSP). The mechanism investigations showed that the physical barrier effect and catalytic carbonization produced by CNP@Mo hybrids during the combustion process are the main reasons for the improved flame retardancy of epoxy coatings.
研究领域:
材料科学
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燃烧学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 3
·561
·
IF 3.4
Xin Liang,Cheng Hua,Mingrui Zhang,Yu Zheng,Shijie Song,Meng Cai,Yu Huang,Can He,Xiaoqiang Fan
Aluminum alloys with low density and high specific strength have been widely used in marine engineering. Epoxy coatings, a simple and economical protection strategy, have been applied on alloy surfaces to prolong service life. However, a pure epoxy coating cannot provide long-term protection for metals in the marine environment. Hence, in this work, nano-alumina (nano-Al2O3) modified by polyethyleneimine (PEI) were added into epoxy coatings to enhance anticorrosion properties. Using Fourier transform infrared spectroscopy (FTIR), we found that the molecular chain of PEI was successfully grafted on the surface of nano-Al2O3, and the cross profile of coatings indicated that the modified nano-Al2O3uniformly dispersed in the epoxy coating. Electrochemical impedance spectroscopy (EIS) results demonstrate that the coating resistance of the modified epoxy nanocomposite coating was 10 times higher than that of the pure epoxy coating after 3 days of immersion in 3.5 wt.% NaCl solution. Meanwhile, the surface morphologies and EDS-mapping of substrates after EIS testing show that the substrate coated with modified epoxy nanocomposite coating had the smallest amount of corrosion products. These results show that this modified epoxy nanocomposite coating has excellent anticorrosion performance.Keywords:epoxy coating;nano-Al2O3;functionalization;corrosion resistance;electrochemistry
研究领域:
材料科学
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腐蚀与防护
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Nanqi Shi,Haiyan Li,Xin Li,Hongxin Luo,Jiaying Jin,Jiayu Wang,Shuang Li
Two-dimensional hexagonal boron nitride (h-BN) has excellent corrosion resistance and barrier ability, showing unique advantages in the field of anti-corrosion. The h-BN was assembled with Zeolite imidazolate framework material (ZIF-8) and benzimidazole (BI), and an active filler (h-BN/ZIF-8@BI) with shielding and active corrosion resistance was prepared. Zeolite imidazolate framework material was in-situ grown on h-BN surface and loaded with benzimidazole (BI), prepared an active anticorrosive filler with high shielding property (h-BN/ZIF-8@BI). The microstructure, crystal form, element composition, corrosion inhibition ability and thermal stability of h-BN/ZIF-8@BI were studied. The barrier, corrosion inhibition and anti-friction properties of EP/h-BN/ZIF-8@BI combined with F51 epoxy resin were explored. EIS test shows that the corrosion inhibition efficiency of h-BN/ZIF-8@BI is as high as 81.8 %. The impedance modulus of the steel matrix protected by the composite coating was about 2 orders of magnitude higher than that of the control sample, showing excellent barrier ability. In addition, the salt spray test proves that the composite coating has excellent corrosion inhibition characteristics. Taber testing machine shows that the wear mass loss of EP/h-BN/ZIF-8@BI coating is 34.5 % lower than that of EP coating. This work provides a novel idea for the preparation of high barrier, active anticorrosive and wear resistant anticorrosive coatings, and provides a new horizon of the composite coatings.
研究领域:
材料科学
·
腐蚀防护
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2016
·
IF 6.198
Cheng Chen,Shihui Qiu,Mingjun Cui,Songlv Qin,Guoping Yan,Haichao Zhao,Liping Wang,Qunji Xue
Graphene(G)-based polymer nanocomposites have attracted great interest owing to their superior physicochemical properties over polymers. However, the tendency of graphene sheets to aggregate makes it difficult to achieve homogenous dispersion in polymer matrix . Herein, by utilization of poly(2-butylaniline) (P2BA) as a dispersing agent , stable dispersion of graphene in organic solvents was achieved via non-covalent π-π interactions between P2BA and graphene nanosheets . The exfoliated graphene nanosheets were then integrated with coating matrix by curing reaction of epoxy resin with P2BA functionalized graphene (P2BA-G) and amine hardener . Embedding a small percentage of well-dispersed graphene nanosheets (P2BA 0.5% -G 0.5% ) in epoxy coating remarkably improved anticorrosion performance and wear resistance properties, which was attributed to the synergistic effects of the redox catalytic capability of P2BA, high mechanical and barrier properties of well-dispersed graphene nanosheets in the epoxy matrix . The present study provides a promise strategy for development of graphene reinforced organic coatings with superior physical-mechanical properties for metal protection.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Yuqing Liang,Hanwen Zuo,Mingyu Wen,Junyou Shi,Heejun Park
The traditional epoxy resin not only is flammable and non-recyclable and but also heavily dependents on petroleum resources, which cannot meet the requirements of fire prevention and sustainable development. In this study, a vanillin intermediate (VAP) with dynamic imine bond (C=N) was prepared by schiff base reaction between the lignin derivative vanillin (-CHO) and the cage-like polyhedral oligomeric silsesquioxane OA-POSS(−NH 2 ). Then, a biomass-based P-N-Si flame retardant (VAPD) was synthesized by adding 9,10-Dihydro-9-Oxa-10-Phosphaphenanthrene-10-Oxide (DOPO) into the VAP. Subsequently, the VAPD acted as curing agent of epoxy resin to prepare epoxy wood coatings (VAPDs/EP). The results showed that the VAPD-5/EP coating not only exhibited excellent self-healing property and was able to achieve 100 % healing within 35 min, but also presented distinctive UV-shielding performance. In addition, the VAPD-5/EP coating reached V-0 level of UL-94 test and got 29.3 % of limiting oxygen index (LOI). Compared with EP coating, the peak heat release rate (pHRR) decreased by 38 %. Furthermore, the VAPD-5/EP coating reached 6H level of hardness test and 4B level of adhesion test. A simple strategy for preparing self-healing flame retardant epoxy coatings with comprehensive properties for protection of wood materials was proposed in this study.
研究领域:
材料科学
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生物质能
·
化学工程
✓ 已验证
DOI
高影响因子
Coatings
·
2025
·Vol. 15
·期 5
·505
·
IF 2.8
Qiuli Zhang,Yaning Yu,Jingjing Li,Chengxian Yin,Feng Tian,Jiahui Liu,Jun Zhou
To address the issue of metal corrosion in marine environments, we developed a nanofiller with corrosion resistance and UV absorption capabilities. This nanofiller is prepared using a coprecipitation hydrothermal method and consists of TTA intercalated into an LDH structure with an outer layer containing CeO2, forming a layered double hydroxide (LDH) sandwich structure nanocontainer. TTA can be successfully released in corrosive environments, and the filler exhibits excellent corrosion inhibition and interlayer ion exchange properties. Polarization curve analysis shows that the corrosion inhibition efficiency of MgAl-TTA LDH@CeO2reaches 89.87%. After immersion in a corrosion solution for 60 days, the EP/MgAl-TTA LDH@CeO2coating maintains a high impedance of 3.88 × 108Ω·cm2in the low-frequency region, which is 166 times that of the pure EP coating. Even after 240 h of UV aging, the impedance of the EP/MgAl-TTA LDH@CeO2coating remains high at 3.10 × 108Ω·cm2(20,000 times higher than the pure EP coating). This significantly enhances the coating’s anti-aging and corrosion resistance, providing a feasible method for creating new long-lasting corrosion-resistant coatings in challenging environments.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Qiaoyin Li,Aijie Ma,Yuxiang Zhang,Wei Gao,Hongwei Zhou
Superhydrophobic materials have attracted significant attention for their exceptional surface wettability. However, their short service life limits their application in practical anti-corrosion engineering. Magnesium alloys exhibit numerous unique properties but suffer from poor corrosion resistance. To enable the widespread use of magnesium alloys, it is crucial to develop effective anti-corrosion strategies. In this study, a mechanically stable superhydrophobic material was developed using siloxane-modified SiO₂ combined with an adhesive. Test results showed that the contact angle of this superhydrophobic material reached 160° and demonstrated excellent mechanical stability and antifouling properties. Even after 60 cycles of tape adhesion-peeling tests, the contact angle was remained above 150°. In addition, we used an epoxy resin (EP) coating as a primer and sprayed this superhydrophobic material on its surface to prepare a dual-layer coating for the anti-corrosion of magnesium alloys. The coating retained outstanding anti-corrosion performance after immersion in a 3.5 % NaCl solution for 30 days, with impedance values two orders of magnitude higher than those of the pure EP coating. The combination of superhydrophobic material and EP coating provides durable and effective protection for magnesium alloys. We believe that this method presents a promising approach for designing novel anti-corrosion coatings.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Xiaomeng Li,Shuxue Zhou
Utilization of Ti 3 C 2 nanosheets for enhancing anticorrosion of epoxy resin coatings has been reported. But the epoxy coatings in real world are mainly pigmented coatings. Unfortunately, the anticorrosion behavior of Ti 3 C 2 nanosheets for the pigmented epoxy coatings is rarely concerned. In this work, both 0.5 wt% unmodified Ti 3 C 2 nanosheets (U-Ti 3 C 2 ) or 0.5 wt% (3-glycidyloxypropyl)trimethoxysilane-modified Ti 3 C 2 nanosheets (G-Ti 3 C 2 ) were introduced into solvent-based titania pigmented epoxy coatings. Corrosion resistance of coatings was evaluated by electrochemical impedance spectroscopy and salt spray tests. A titania concentration effect was interestingly exhibited for the anticorrosion behavior Ti 3 C 2 -containing pigmented coatings. Enhanced anticorrosion was only demonstrated when TiO 2 content was not above 10 wt% for U-Ti 3 C 2 or 5 wt% for G-Ti 3 C 2 . Moreover, the pigmented coatings with U-Ti 3 C 2 have better corrosion resistance than those with G-Ti 3 C 2 , being contrary to the phenomenon observed in pure epoxy resin coatings. The different anticorrosion behavior of Ti 3 C 2 nanosheets for epoxy coatings with various TiO 2 contents was mainly attributed to the different dispersion states of TiO 2 pigments, that is, improved dispersion at low TiO 2 content and deteriorated dispersion at high TiO 2 content, after addition of Ti 3 C 2 nanosheets.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Mehedi Hasan,Baojiang Sun,Changhong Yu,Wang Ma,Yonghai Gao,Litao Chen
In this study, the effect of the solvents on the formation of superhydrophobic fumed silica/ FAS-17/epoxy surfaces modified by the incorporation of hydrophobic fumed silica nanoparticles was investigated. We used three different solvents, namely n-butyl acetate, ethyl acetate, and dichloromethane, to develop a superhydrophobic surface using the easily applicable doctor's blade method. Surfaces obtained were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR). The performances of the different solvent-based coated surfaces were compared by measuring the contact angle (CA) of three liquids, sliding angles (SA), surface friction force, environmental adaptability, and self-cleaning performance. The water contact angles (WCAs) of the n-butyl acetate, ethyl acetate, and dichloromethane-based coated surfaces were 149.70°±5.52°, 146.89°±3.7°, and 147.34°±2.50°, respectively, which were 150.36°±4.03°, 147.53°±4.97°, and 148.68°±3.36° for a 3.5% NaCl solution. Comparing the wettability, environmental durability, and self-cleaning performance of the different solvent-based coated surfaces, n-butyl-acetate-based coated surfaces showed better performance compared to ethyl-acetate- or dichloromethane-based coated surfaces.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2020
·
IF 6.479
Li Cheng,Hao Wu,Jia Li,Haichao Zhao,Liping Wang
It is known that two-dimensional nanosheets such as graphene, hexagonal boron nitride and layered double hydroxide can provide organic coatings with enhanced anticorrosion performance due to the high aspect ratio and excellent barrier property. As a kind of biocompatible material, the corrosion resistance of hydroxyapatite (HAp) in the biological body leads to its wide application. In this work, ultrathin HAp nanosheets were noncovalently functionalized by situ self-polymerization of dopamine chemistry with an aim to improve their compatibility and dispersibility in epoxy matrix. Electrochemical impedance spectroscopy (EIS) illustrated composited coating exhibited a higher value of impedance at low frequency compared to pure epoxy coating after 50 days of immersion in 3.5 wt% NaCl solution. Local electrochemical impedance spectroscopy (LEIS), spray tests and corrosion products characterization were also carried out to evidence that the modified HAp nanosheets could significantly improve the anti-corrosion performance of epoxy coatings via the enhanced barrier property and corrosion inhibiting effect of polydopamine, which is expected to be widely applied as nano-reinforcing fillers in the anticorrosion field.
研究领域:
材料科学
·
腐蚀与防护
·
表面化学
✓ 已验证
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 10
·1578
·
IF 3.164
Haijuan Yang,Qiufeng Mo,Weizhou Li,Fengmei Gu
An organic coating is commonly used to protect metal from corrosion, but it is prone to failure due to microcracks generated by internal stress and external mechanical action. The self-healing and self-lubricating achieved in the coating is novel, which allows an extension of life by providing resistance to damage and repair after damage. In this study, a new approach to microencapsulating bifunctional linseed oil with polyurethane shell by interfacial polymerization. Moreover, the self-healing and self-lubricating coatings with different concentrations of microcapsules were developed. The well-dispersed microcapsules showed a regular spherical morphology with an average diameter of ~64.9 μm and a core content of 74.0 wt.%. The results of the salt spray test demonstrated that coatings containing microcapsules still possess anticorrosion, which is improved with the increase of microcapsules content, after being scratched. The results of electrochemical impedance spectroscopy showed a |Z|f=0.01Hzvalue of 104Ω·cm2for pure epoxy coating after being immersed for 3 days, whereas the coating with 20 wt.% microcapsules was the highest, 1010Ω·cm2. The results of friction wear showed that the tribological performance of the coating was enhanced greatly as microcapsule concentration reached 10 wt.% or more, which showed a 86.8% or more reduction in the friction coefficient compared to the pure epoxy coating. These results indicated that the coatings containing microcapsules exhibited excellent self-healing and self-lubricating properties, which are positively correlated with microcapsules content.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）