PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Mingli Li,Xiaohan Hao,Mengliang Hu,Yishuai Huang,Chen Tang,Youyi Chen,Liping Li
In this paper, a novel phosphate-containing epoxy reactive flame retardant (VB) was successfully synthesized by one step reaction using vanillin (VA) and benzene phosphorous oxydichloride (BPOD). The chemical structure of the VB was analyzed by FTIR, NMR ( 1 H and 31 P) techniques. The flame retardant epoxy coating was constructed on wood surface according to different phosphorus content. Compared to EP-0, the coating containing VB exhibited comparable the physical properties on wood. Besides, thermal stability and flame retardancy have been significantly improved at phosphorus content of 4.07 %. The char residue of EP-4.07 was obviously increased from 14.99 % (EP-0) to 47.08 % at 700 °C. Meanwhile, the EP-4.07-Wood presented a high limiting oxygen index (LOI) value of 32.9 % and passed UL-94 V-0 rating. Besides, the cone calorimeter (CONE) confirmed that the total heat release (THR) and smoke production (TSP) of EP-4.07-Wood were 47.95 MJ/m 2 and 6.26 m 2 /kg, reduced by 50.8 % and 71.2 % compared to EP-0-Wood, respectively, thus to achieve superior flame retardancy and smoke suppression. The results of SEM and TG-IR exhibited that VB was responsible for flame retardant both in the gas and condensed phase. Hence, this study exhibited a continuable, environment-friendly strategy to construct flame retardant wood coating, which displayed enormous potential in wood application.
研究领域:
材料科学
·
林业工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Ziyang Zhou,Sepideh Pourhashem,Zhengquan Wang,Jiawen Sun,Xiaohong Ji,Xiaofan Zhai,Jizhou Duan,Baorong Hou
In this research, the effects of fresh and oxidized MXene on the surface, adhesion, and corrosion-resistant properties of waterborne epoxy coatings are considered. The oxidized MXene is prepared through storage of fresh MXene nanosheets in an open vial for 1 month. The results confirm that the waterborne epoxy coating loaded with silane functionalized fresh MXene nanosheets (epoxy/F-MXene) has significantly higher barrier performance and anti-corrosion behavior than the sample modified with silane functionalized oxidized MXene nanosheets (epoxy/F-O-MXene). Indeed, the F-MXene nanosheets (with defect-free and large two dimensional morphology) are able to effectively inhibit the path of corrosive media as well as increment the epoxy matrix compactness compared to the F-O-MXene (with broken nanosheet morphology composed of TiO 2 nanoparticles) due to rapid oxidation of the MXene nanosheets in the environment. Besides, the epoxy/F-MXene nanocomposite coating has slightly higher water contact angle and adhesion strength to the metallic substrate compared to the epoxy/F-O-MXene. The results of this research clearly reveal the importance of preventing MXene oxidation before application as nanofiller in the polymer 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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 12
·e53637
·
IF 3
Xiuzhou Lin,Xulei Chen,Shixiong Zhao,Baojie Dou,Qiang Peng,Zhiqiang Deng,Wilfred Emori,Xiulei Gao,Zhiwen Fang
Fluorinated graphene (FG) is a derivative of graphene with excellent insulating properties, however, the dispersion performance of FG in organic coatings is still a challenge in anti-corrosion applications. This study aims to propose a simple strategy to effectively improve the dispersion of FG towards enhancing its interfacial compatibility with epoxy resins. FG was modified with amino-containing 3-aminopropyl triethoxysilane (APTES) and epoxy terminated 3-glycidoxypropyl trimethoxysilane (GPTMS). The chemical compositions and microstructures of FG and the silane-modified FGs were effectively characterized. Moreover, the corrosion resistance and anticorrosion mechanisms of the epoxy coatings modified by FG and silane-modified FG were systematically studied, and the results showed that the silane coupling agent effectively improved the dispersion of FG in the epoxy coating and enhanced the interface interaction between FG and the epoxy resin, thereby improving the barrier properties of the epoxy coating and preventing the penetration of the corrosive medium. Electrochemical and tribological analyses showed that the APTES-modified FG (AFG) coating exhibited better anti-corrosion properties than the GPTMS-modified FG (GFG) coating, which is attributed to the improvement of its crosslinking density and barrier properties by the reactions between the amino groups on AFG and the epoxy resin.
研究领域:
材料科学
·
化学工程
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Kang Fu,Yi Tian,Zongting Zhu,Shixin Fa,Qiuyu Zhang
Transparent omniphobic coatings have attracted extensive research over the past decade to meet growing application demands. Polydimethylsiloxane (PDMS)-based anti-fouling coatings have been widely reported to contribute a liquid-like surface for liquid repellency. The bulky PDMS chains usually make the surface greasy and energy-consuming. Fluorinated epoxy is expected to overcome the above drawbacks and contribute to excellent mechanical robustness. However, the reported fluorinated epoxy coatings are unsatisfactory due to severe phase separation, excessive fluorine content, poor self-healing and weatherability. In this work, a thiolactone-terminated fluorinated prepolymer (TTFP) was prepared through thiol-click chemistry. The thiolactone structure limited the phase separation and reacted efficiently with epoxy resin in a thiol-click manner after ring-opening. The flexible TTFP molecules had a strong surface migration ability, allowing the product coating to be liquid repellent with a low fluorine content and self-healed after damage. Therefore, a low-cost, eco-friendly, anti-ultraviolet, self-healed, highly transparent, mechanically robust and chemically resistant fluorinated epoxy coating was proposed. In addition to the excellent repellency to ink traces, fingerprints and thick paint, the coating with 5H pencil hardness could maintain omniphobic properties after 100 h of intensive UV irradiation or 12 h of alkali corrosion. Benefiting from the strong surface migration ability of flexible fluoroalkyl chains, the coating could recover its omniphobicity within 30 min of heating. The characterization results show the excellent comprehensive properties of the coating and its great potential for application in various scenarios.
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
·
2023
·
IF 8.3
Jinke Wang,Lingwei Ma,Zhibin Chen,Yue Wang,Chenhao Ren,Tong Liu,Li Ma,Cunguo Lin,Dawei Zhang
A high-throughput method was proposed to screen coating fillers with both good corrosion-sensing and inhibition performances. SiO 2 nanoparticles loaded with different percentages of phenanthroline (Phen) and 1-hexadecyl-3-methylimidazolium chloride (HDMIC) were prepared (Ph-HD@SN) using a multi-channel synthesis instrument. The corrosion-sensing ability of different Ph-HD@SN to detect Fe 2+ ions can be determined by spectrophotometric method within 30 s. The corrosion inhibition effect of Ph-HD@SN was evaluated by visual assessment and quantification of iron dissolution from carbon steel in NaCl solutions containing different nanoparticles . The optimized Ph-HD@SN was incorporated into epoxy coating to achieve the corrosion-sensing and self-healing properties.
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
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Jingjing Li,Longjiang Lian,Simin Chen,Bing Lei,Xin Yuan,Zhiyuan Feng,Guozhe Meng,Liang Jia,Zhi Long
Searching for an optimal material additive that can enhance both the cathodic protection and barrier properties of zinc-rich epoxy coatings (ZRE) simultaneously remains a significant challenge nowadays. In this study, mesoporous Ti 4 O 7 particles with high conductivity and chemical inertness were synthesised via the thermal reduction method and added to ZRE coating. The impact of different Ti 4 O 7 filler contents on the corrosion resistance of ZRE coating containing 70 wt% zinc was assessed by electrochemical analysis , water uptake measurements, salt spray test and material characterisation techniques . The results demonstrated that the incorporation of mesoporous Ti 4 O 7 significantly enhances the initial cathodic protection and long-term barrier properties of ZRE. The primary mechanism involves the conductive Ti 4 O 7 ameliorating the Zn isolation caused by non-conductive Zn corrosion products and fostering a more efficient network for conductive penetration between zinc particles to improve cathodic protection efficacy. Moreover, mesoporous Ti 4 O 7 promotes the uniform deposition and growth of ZnO/Zn(OH) 2 by adsorption and anchoring of Zn(OH) 4 2− and changes the shape of the corrosion product (columnar), thus improving the barrier performance of ZRE coating.
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
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 8
·4815-4825
·
IF 5.2
Yuxiang Nie,Xiaoyao Zhou,Lisong Dong,Zhangzhong Wang,Xin Feng,Jiahua Zhu,Xiaohua Lu,Liwen Mu
A series of epoxy composite coatings filled with liquid metal (LM) and graphene oxide (GO) are successfully prepared as the self-lubricating material in this work. The dispersion of LM and GO (LM@GO) in epoxy coating and its effect on the thermal, tribological, and mechanical properties of epoxy coating are systematically studied by using thermogravimetric analysis, differential scanning calorimetry, mechanical and friction, and wear tester. The LM@GO filler has been proved to be an effective composite filler, which can be uniformly dispersed in epoxy coating, reduce the wear volume, and improve its mechanical properties of epoxy coating. When the filler content is 0.5 wt% LM and 0.03 wt% GO, the wear volume of epoxy composite coating is dramatically reduced by 91.7% and the elastic modulus is increased by 16.3% compared with pure epoxy. The synergistic effect of the friction reduction of LM and the mechanical support of GO makes the composite coating form a uniform and stable transfer film, which improves its wear resistance. And through chemical stability experiments, the composite coating has a strong resistance to acid and alkali. This work will render the epoxy-LM@GO have the potential of application on the mechanical molds, electronic components.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Yan Fang,Zhe Chen,Chongyi Chi,Qinhui Chen
Defects in the curing process of epoxy coatings tend to deteriorate the anticorrosion performance of the coatings. An important way to enhance the anticorrosion performance of epoxy coatings is to add flaky fillers. In this paper, anisotropic Janus nanosheets (JNs) were prepared and modified by cardanol (CA) and Zn 2+ . Then, the obtained CA@JNs@Zn 2+ Janus composite nanosheets were introduced into epoxy coatings. When the content of CA@JNs@Zn 2+ is 0.2 %, the mechanical properties and corrosion resistance of the coating were effectively improved. The tensile strength of 0.2 %-CA@JNs@Zn 2+ /EP coating is 79 % higher than that of pure epoxy coating. The EIS analysis showed that the low-frequency impedance of the coating remained as high as 16.45 Gohm·cm 2 after 35 days of immersion, and remained above 10 Gohm·cm 2 during the whole immersion period, which demonstrating the optimal corrosion resistance. This paper provides a theoretical basis for the preliminary application of Janus material in the field of anticorrosion, and the prepared composite coatings are expected to be used for anticorrosion in harsh environment.
研究领域:
材料科学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Chuanpeng Li,Yu Liu,Qiangliang Yu,Shuang Sun,Siyu Liu,Chen Zhao,Xingwei Wang,Shuangshuang Yang,Bo Yu,Meirong Cai,Feng Zhou,Weimin Liu
In this study, two-dimensional transition metal carbides and carbon nitride (MXene) and mesoporous silica nanoparticles (SiO 2 ) loaded with corrosion inhibitor 1-(3-((N-n-butyl) aminecarboxamido) propyl)-3-hexadecyl imidazolidin bromide (M16) were used to prepare a M16@MXene-SiO 2 nanocomposite with good anti-corrosion and wear resistance. The structure and composition of the nanocomposites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). The synthesized M16@MXene-SiO 2 nanocomposite was then added to an epoxy coating on Q235 carbon steel. The uniform distribution of M16@MXene-SiO 2 in the coating was confirmed by SEM and atomic force microscopy (AFM). The electrochemical impedance spectroscopy (EIS) test showed that the corrosion resistance of epoxy coating was the best when the addition amount of M16@MXene-SiO 2 was 5 wt%, and its electrochemical impedance could reach 5.98 × 10 9 Ω∙cm 2 . After 144 h immersion, the coating resistance (R c ) of the epoxy coating decreased to 3.88 × 10 3 Ω∙cm 2 , and that of the epoxy coating with M16@MXene-SiO 2 increased to 1.01 × 10 4 Ω∙cm 2 . The corrosion inhibition efficiency of M16@MXene-SiO 2 was tested by potentiodynamic polarization. After immersion for 24 h, the corrosion current density (I corr ) of the epoxy coating was 2.23 × 10 −7 A∙cm −2 , which reduced to 4.38 × 10 −8 A∙cm −2 after adding M16@MXene-SiO 2 and the corrosion inhibition efficiency increased by 80.36 %. In addition, the wear resistance of the epoxy coating was tested by reciprocating friction experiment. The friction coefficient of the epoxy coating decreased from 0.44 to 0.12 after adding 5 wt% M16@MXene-SiO 2 . The results showed that the composite coating had excellent corrosion resistance, self-healing properties and wear resistance. The improvement in corrosion could be explained by the filling of coating defects with MXene-SiO 2 and the formation of corrosion inhibitor films. The improvement of friction performance was mainly attributed to the friction transfer film formed by MXene-SiO 2 and M16.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Sepideh Pourhashem,Mohammad Hassan Hadizadeh,Xiaohong Ji,Ziyang Zhou,Jizhou Duan,Xiaohong Ci,Hao Lu,Baorong Hou
Two different silane agents including 3-aminopropyltriethoxysiane and tetraethyl orthosilicate are used to achieve MXene nanosheets grafted with amino-silane (Silane@MXene) and MXene nanosheets covered with SiO 2 nanoparticles (SiO 2 @MXene), respectively. The Silane@MXene and SiO 2 @MXene are used as nanofillers in a solvent-based epoxy coating and applied with a dry film thickness of 200 ± 50 μm on steel substrates. The neat epoxy and epoxy loaded with SiO 2 @MXene and Silane@MXene show water contact angles of 75.8°, 88.4°, and 115.8° and adhesion strengths of 3.2, 4.8, and 6 MPa, respectively. The neat sample fails after 28 days of immersion in the 3.5 wt% NaCl solution, while the coatings loaded with SiO 2 @MXene and Silane@MXene show low frequency impedance modulus of 4.34 × 10 7 and 2.97 × 10 8 Ω.cm 2 after 56 days of immersion, respectively. Moreover, density functional theory calculations indicate that both APTES and TEOS structures exhibit reactivity and promise for interacting with the MXene/solution interface. Molecular dynamics simulation shows that both Silane@MXene and SiO 2 @MXene are effective in protecting against the 3.5 wt% NaCl solution. The diffusion of Na + and Cl − in Silane@MXene is marginally higher compared to the SiO 2 @MXene systems. The exceptional adsorption capacity of the Silane@MXene makes it a suitable material for protection against NaCl solution.
研究领域:
材料科学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Chenyang Zhao,Yi Huang,Yue Li,Chen Wang,Wenlin Yuan,Di Cheng,Tao Shen,Ji Zhang,Jie Liu,Chao Yang,Chunchun Wu,Qianhong Shen,Hui Yang
Nanocontainers encapsulating corrosion inhibitors are commonly incorporated into organic coatings to enable self-healing effects, thereby ensuring long-term anticorrosion performance. In this study, a novel dual corrosion inhibitor-loaded self-healing nanocontainer with core-shell structure was proposed for fabricating composite waterborne epoxy coatings with both active and passive corrosion prevention properties. The nanocontainer, named BTA-ZIF-8@LDH-Mo, was synthesized through the in-situ growth of molybdate-intercalated ZnAl layered double hydroxide (LDH-Mo) on the surface of 1H-benzotriazole-inbuilt zeolitic imidazolate framework (BTA-ZIF-8). Potentiodynamic polarization results showed that the I corr of bare Q235 carbon steel immersed in a 3.5 wt% NaCl solution decreased from 4.658 × 10 −6 A/cm 2 to 1.274 × 10 −6 A/cm 2 after introducing BTA-ZIF-8@LDH-Mo nanocontainers, resulting in a superior corrosion inhibition efficiency of 72.65 %. Electrochemical impedance spectroscopy further demonstrated that the |Z| f=0.01Hz of epoxy coating doped with BTA-ZIF-8@LDH-Mo reached 4.24 × 10 9 Ω·cm 2 after 42 d of immersion in 3.5 wt% NaCl solution, approximately 30 times higher than that of pure EP coating. Moreover, investigations on artificially scratched coatings indicated that the incorporation of BTA-ZIF-8@LDH-Mo nanocontainers effectively mitigated the corrosion process by forming an inhibiting layer on the metal substrate that impeded the corrosion process. The dual corrosion inhibitor strategy relies on the synergistic action of BTA pre-loaded in ZIF-8 nanoparticles and molybdate ( MoO 4 2- ) intercalated in LDH interlayers for active corrosion protection . Additionally, the nanocontainers enhance passive protection by elongating the diffusion paths of corrosive media and trapping chloride ions. This nanocontainer design offers a facile strategy for fabricating a smart coating with the excellent anticorrosion properties.
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
CORROSION
·
2022
·Vol. 78
·期 4
·324-338
·
IF 2.094
Xu Yangshuhan,Mao Jie,Li Minghua,Wang Shufen,Yu Tingting
Corrosion of carbon steel causes many losses, hazards, and contaminations to our daily life. In this article, epoxy synergistically added with hydrophobic nano-silica and graphene was prepared to provide corrosion protection for carbon steel. Graphene can act as filler to improve the corrosion resistance of epoxy, but the aggregation of graphene severely affects its application. Embedding hydrophobic nano-silica into graphene sheets contributes to the good dispersity of graphene in an epoxy matrix. Besides, SiO 2 can also act as another filler to improve corrosion resistance. Hence, the synergistical addition of hydrophobic nano-silica and graphene into epoxy can provide better corrosion resistance for modified epoxy coating. A scanning electron microscope was used to investigate the microstructures of modified epoxy coating. Coating wettability was measured by a static contact angle measurement instrument. The anticorrosive behaviors of modified coatings were measured by an electrochemical workstation. The corrosion mechanism was analyzed by equivalent circuits simulation. According to the results, the modified coating with impedance of about 10 8 Ω·cm 2 (10 mHz) at 100 d immersion still showed excellent anticorrosive performance. In general, epoxy doped with hydrophobic nano-silica and graphene displays better corrosion protection than epoxy without modification.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）