Core/shell emulsion micro- and nanocontainers for self-protecting water based coatings

Grigoriev, D. O.; Shchukina, Elena; Tleuova, Aiym; Aidarova, Saule; Shchukin, Dmitry

doi:10.1016/j.surfcoat.2016.01.002

Cited by 16 publications

(12 citation statements)

References 12 publications

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“…[8] Thus, if an emulsion model can be introduced into the ECODSp rocess, the catalytic efficiency may be greatlye nhanced because of the expandedr eactive area andt he maximizedu tilization of the reactions ystem. [9] However, it hasb een reported that some conventionale mulsion systems, such as microemulsions, are often too stable to be demulsified, whichl eads to increased difficulty in the recovery and reuse of both the catalysts and extractants. [10] Moreover,a mphiphilic organic surfactants have also been used as emulsifiers in theseemulsions.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Emulsion Based on Janus Nanosheets for Ultra‐Deep Desulfurization

Xia

Zhang

Zhou

et al. 2017

Chemistry A European J

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Catalytic Janus nanosheets were synthesized by using an anion-exchange reaction between heteropolyacids (HPAs) and the modified ionic-liquid (IL) moieties of Janus nanosheets. Their morphology and surface properties were characterized by using SEM, energy-dispersive spectroscopy (EDS), FTIR spectroscopy, and X-ray photoelectron spectroscopy (XPS) studies. Because of their inherent Janus structure, the nanosheets exhibited good amphipathic character with ILs and oil to form a stable ILs-in-oil emulsion. Therefore, these Janus nanosheets can be used as both emulsifiers and catalysts to perform emulsive desulfurization. During this process, sulfur-containing compounds at the interface could be easily oxidized and efficiently removed from a model oil. Application of this Janus emulsion brings an efficient, useful, and green procedure to the desulfurization process. Compared with the desulfurization catalyzed by using HPAs in a conventional two-phase system, the sulfur removal of dibenzothiophene (DBT) achieved in a Janus emulsion system was improved from 68 to 97 % within 1.5 h. Moreover, this emulsion system could be demulsified easily by simple centrifugation to recover both the nanosheets and the ILs. Owing to the good structural stability of the Janus nanosheets, the sulfur removal efficiency of DBT could still reach 99.9 % after the catalytic nanosheets had been recycled at least six times.

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Section: Introductionmentioning

confidence: 99%

Catalytic Emulsion Based on Janus Nanosheets for Ultra‐Deep Desulfurization

Xia

Zhang

Zhou

et al. 2017

Chemistry A European J

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“…These compounds contain oxygen and nitrogen atoms, which form covalent bonds on the surface of low carbon steel and lead to the effect of corrosion inhibition. The authors [25] state that the concentration of freely dispersed compounds in a wet coating film should be limited to a maximum of 15 wt% in order to avoid the potential for a negative effect on the integrity of the coating matrix. Since the concentration of all additives together does not exceed a fraction of 10 wt%, it is apparent that there was some space for additional integration of inorganic MSNs.…”

Section: Discussionmentioning

confidence: 99%

“…The release of Oxine from particles should be more pronounced in a slightly basic environment, when such medium penetrates the coating, as reported in ref. [25]. This explains the fact that the breakpoint frequency drops after 48 hr of immersion time, when the inhibitor is released from the nanoparticles in sufficient quantities (which is more pronounced for samples with a higher concentration of embedded particles), and when an active reaction occurs.…”

Section: Immersion Testmentioning

confidence: 94%

“…Time (hr) molecules (predominantly existing in the deprotonated state of 8Q − ) forming very stable complexes with iron cations such as Fe 3+ [25] Fitted results to the individual components of the equivalent circuit are tabulated in Table 2. Samples containing inhibitor loaded particles exhibited for order of magnitude greater resistance values relative to the Blank sample.…”

Section: Samplementioning

confidence: 99%

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Impact of inhibitor loaded mesoporous silica nanoparticles on waterborne coating performance in various corrosive environments

Židov

Lin

Stojanović

et al. 2020

J of Applied Polymer Sci

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This article is a contribution to the development of the smart, self-healing solutions in the context of corrosion protection of metallic materials based on nanotechnology. Mesoporous silica nanoparticles were successfully synthesized and loaded with two different corrosion inhibitors, 1-hydroxybenzotriazole and 8hydroxyquinoline. Loaded particles were embedded in different concentrations in waterborne epoxy coating, and as such applied to low carbon steel substrates. A continuous immersion test in 3.5% NaCl solution, humidity chamber exposure, and salt spray exposure were performed. Successful synthesis of silica nanoparticles has been demonstrated using scanning electron microscopy and energy-dispersive X-ray spectroscopy characterization techniques. Fourier transform infrared spectroscopy was used to confirm the loading of inhibitors, while the quantity of loaded inhibitors was determined by thermogravimetric method. Anticorrosive performance of intact composite coatings was determined using electrochemical impedance spectroscopy and open-circuit potential measurements. Adhesive properties were determined using the pull-off test (ISO 4624). Significant improvement in corrosion protection performance has been demonstrated for coatings containing inhibitor-loaded nanoparticles.

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“…Examples of this approach are provided by self-healing coatings that are capable of mitigating the corrosion attack by releasing encapsulated inhibitors when detecting electrochemical activity. This strategy has been successful in polymeric based materials and organic coatings [19,20]. However, the active functionalisation of ceramic materials is more challenging since inorganic matrices are more rigid and inert compared to the organic ones.…”

Section: Introductionmentioning

confidence: 99%