Characterization of superhydrophobic epoxy coatings embedded by modified calcium carbonate nanoparticles

Atta, Ayman M.; Al‐Lohedan, Hamad A.; Ezzat, Abdelrahman O.; Al‐Hussain, Sami A.

doi:10.1016/j.porgcoat.2016.10.008

Cited by 56 publications

(27 citation statements)

References 47 publications

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“…Sargheini et al [6] (2011) also synthesized CaCO 3 nanoparticles by mechanochemical processing and reported a mean agglomerate diameter of 12.7 μm according to LPSA (laser particle size analyzer) analysis. CaCO 3 nanoparticles synthesized by mechanochemical processing showed a narrower distribution of hydrodynamic diameter than the nanoparticles synthesized through carbonation method by Atta et al [27] (2016), whose calcium carbonate particles were capped with hydrophobic fatty acids as to control size increments. The cubic morphology and the nanometric size of CaCO 3 particles were evidenced by TEM images (Figure 2).…”

Section: Results and Discussion 31 Characterization Of Caco 3 Nanopmentioning

confidence: 79%

“…In the first step, the mass loss occurs near 100°C due to the adsorbed water, which is almost negligible on Figure 1c. In the second step, CaCO 3 decomposes into calcium oxide and carbon dioxide [27]. Once more, the thermal analysis showed that there is no substance other than calcium carbonate in the nanomaterial.…”

Section: Results and Discussion 31 Characterization Of Caco 3 Nanopmentioning

confidence: 99%

“…Table 5 shows the calculations results and the increase in the fraction of the composite interface occupied by air with the increase of the WCA, suggesting that air is trapped between liquid and solid. Therefore, some CaCO 3 nanoparticles aggregates are beneficial to the formation of the hydrophobic surface cos cos f f [27,40,42]. In addition, materials with more hydrophobic surfaces can improve their corrosion resistance and, as a result, have an increase in their working life.…”

Section: Characterization Of Epoxy/nano Caco 3 Compositesmentioning

confidence: 99%

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Hierarchical microstructure of nanoparticles of calcium carbonate/epoxy composites: Thermomechanical and surface properties

Miranda¹,

Silva²

2020

Express Polym. Lett.

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Calcium carbonate nanoparticles of calcite structure and nanometric size were successfully synthesized by mechanochemical processing using low energy mill (100 rpm). Transmission electron micrographs demonstrated that the nanoparticles tend to form agglomerates of approximately 1 μm due to their high surface energy. A study of structure and properties of composite materials resulting from the addition of CaCO 3 nanoparticles at concentrations of 1, 2.5 and 5 wt% to epoxy resin was made. Epoxy/1 wt% CaCO 3 and epoxy/2.5 wt% CaCO 3 composites displayed an increase of 8 and 12°C in glass transition temperature (T g ), respectively. Scanning electron microscopy images of composites revealed a hierarchical structure of micrometric sized extended aggregates of nanometric calcium carbonate particles homogeneously distributed in the polymer matrix. This morphology explains the increase in hydrophobicity, as well as gains in Young's moduli, which were greater than 59% with respect to the neat epoxy as measured by Nanoindentation. Therefore, this work demonstrates that the optimum range of concentration up to 2.5 wt% of high-quality nano CaCO 3 guarantees thermal, mechanical and surface significant improvements associated with a hierarchical microstructure-nanostructure, which ultimately extend the possibilities of application of epoxy materials for nowadays challenges.

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Section: Results and Discussion 31 Characterization Of Caco 3 Nanopmentioning

confidence: 79%

Section: Results and Discussion 31 Characterization Of Caco 3 Nanopmentioning

confidence: 99%

Section: Characterization Of Epoxy/nano Caco 3 Compositesmentioning

confidence: 99%

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Hierarchical microstructure of nanoparticles of calcium carbonate/epoxy composites: Thermomechanical and surface properties

Miranda¹,

Silva²

2020

Express Polym. Lett.

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“…New approaches based on functionalization of environmentally friendly carbon derivatives, such as graphene, with new functional groups such as epoxide, carboxylic acids and amines have been recommended to promote the adhesion properties of steel surfaces with epoxy via chemical-covalent bonding between the steel substrate and epoxy coatings [7][8][9]. Moreover, chemical modification and functionalization of organic or inorganic fillers with epoxy or amine groups for bonding with epoxy networks and steel surface has also been recommended to improve performance of the epoxy coatings [10][11][12][13]. In this…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Silica with Triazine Hydrazide to Improve Corrosion Protection and Interfacial Adhesion Properties of Epoxy Coating and Steel Substrate

et al. 2020

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The chemical bonding of modified filler surfaces with coating networks is an advanced approach for improving the interfacial adhesion force of fillers with coating and substrate surfaces. In this respect, silica gel surfaces were activated and modified by grafting 1,3–dihydrazide-2,4,6-triazine onto hydroxyl groups of activated silica surfaces. The chemical structure, thermal stability and surface morphologies of the modified silica were investigated. The modified silica fillers were blended during the curing of the epoxy resin with the polyamine hardener. The data regarding the chemical structure and thermal stability of the cured epoxy networks in the presence of modified silica elucidated the chemical bonding of amine groups on the silica surfaces cured with the oxirane epoxy resin. Moreover, the incorporation of modified silica in surfaces with epoxy networks improved their adhesion with steel surfaces and enhanced the mechanical, thermal and anticorrosion characteristics of the epoxy to protect steel surfaces against seawater.

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“…Almost all prevailing superhydrophobic coatings can adopt nanotechnology. Silica nanoparticles [9][10][11], carbon nanotubes [12,13], titanium oxide nanotubes [14][15][16][17], nanopolymers [18][19][20] and nanosilane [21][22][23] have been widely used for fabricating superhydrophobic coatings. Procedures such as the dip coating technique, electroless plating, sol-gel process and electro deposition are adopted to fabricate the superhydrophobic coatings.…”

mentioning

confidence: 99%

A Review on Conducting Polymers and Nanopolymer Composite Coatings for Steel Corrosion Protection

Zhang

2019

Coatings

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Corrosion is the principal reason for causing degradation of steel material properties, and coating is one of the most popular and effective ways to protect steel from corrosion. There are many kinds of coatings with different constituents, mechanisms and effectiveness. This paper presents a comprehensive review on the development of coating technology including traditional coatings, hydrophobic coatings, conducting polymer coatings and nanopolymer composite coatings. In particular, conducting polymers and nanopolymer composite coatings are reviewed in detail, which are the most popular and promising coatings. The advantages and limitations of each coating method as well as the influencing factors on corrosion protection are elaborated. Finally, the future research and applications are proposed.Coatings 2019, 9, 807 2 of 22 fluorocarbon coating, silicone coating, polyurethane coating and zinc-rich coating, provide corrosion protection by their barrier effect to ionic species, oxygen and water transport, which diminishes the corrosion rate [5][6][7], but their shortcomings are still significant, such as low impact strength, poor weatherability, poor bond strength and poor durability [8]. Almost all prevailing superhydrophobic coatings can adopt nanotechnology. Silica nanoparticles [9][10][11], carbon nanotubes [12,13], titanium oxide nanotubes [14][15][16][17], nanopolymers [18][19][20] and nanosilane [21][22][23] have been widely used for fabricating superhydrophobic coatings. Procedures such as the dip coating technique, electroless plating, sol-gel process and electro deposition are adopted to fabricate the superhydrophobic coatings. The water contact angles of the superhydrophobic coatings can reach 145-165 • C [9-23]. There is also some literature about using soft lithography method based on a polydimethylsiloxane (PDMS) template to prepare nanostructured superhydrophobic coatings [24,25]. Although significant progress has been achieved regarding the synthesis of superhydrophobic coatings and their anticorrosion properties for steel, the majority superhydrophobic coatings have been studied only in laboratory till now, and there are still many obstacles before they could be widely used in industry. The prevailing fabrications are complicated, costly and not suitable for on-site use. Many efforts should be made to develop an optimum superhydrophobic coating with excellent water repellency, long service life, good adhesion performance, low cost, easy fabrication and convenience in site spraying and curing.In recent years, conducting polymer coatings and nanopolymer composite coatings have been widely used in many projects. Many studies on nanopolymer composite coatings, conducting polymers and their combinations were conducted with a good deal of progress. Some new nontoxic corrosion protection materials with the properties of high efficiency and smart corrosion protection, long effective period and easy construction have been developed.Different coatings have deferent deposition mechanisms. At present, the prev...

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Characterization of superhydrophobic epoxy coatings embedded by modified calcium carbonate nanoparticles

Cited by 56 publications

References 47 publications

Hierarchical microstructure of nanoparticles of calcium carbonate/epoxy composites: Thermomechanical and surface properties

Hierarchical microstructure of nanoparticles of calcium carbonate/epoxy composites: Thermomechanical and surface properties

Functionalization of Silica with Triazine Hydrazide to Improve Corrosion Protection and Interfacial Adhesion Properties of Epoxy Coating and Steel Substrate

A Review on Conducting Polymers and Nanopolymer Composite Coatings for Steel Corrosion Protection

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