Reinforcement of Protective Coatings Based on Powder Paints with Alumina Nanofibers

Симунин, М. М.; Chirkov, D Yu; Zaloga, A. N.; Kuular, A A; Fadeev, Yury V.; Voronin, A. I.; Chizhova, V.V.

doi:10.4028/www.scientific.net/msf.1049.138

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…After mixing the component, the intermediate product was placed in a twin-screw extruder, from where the molten resin entered between the rollers and was molded into a ribbon, which, after cooling on the conveyor, was ground into powder and, thus, was ready for use. From 0.05% to 0.5% of aluminum oxide nanofibers was added to each sample, by analogy with works [9,10] to obtain the concentration of nanofibers in the resin up to and near the percolation threshold, respectively.…”

Section: Synthesismentioning

confidence: 99%

Carboxyl-functionalized aluminum oxide nanofibers for powder coatings

Симунин

Chirkov

Samoilo

et al. 2022

J. Phys.: Conf. Ser.

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The paper considers the production and use of alumina nanofibrous additives in nanocomposite powder paints. The main component of powder paints are polyester resins with a large number of free carboxyl groups, which are cross-linked with special hardening additives. The introduction of additives into the resin is most effective when their surface is matched in terms of physicochemical properties with the resin material. In order to increase the affinity of the alumina nanofibers with the powder paint matrix, the amphoteric surface of the nanofibers must become acidic. The paper describes a method for the functionalization of alumina nanofibers by successive silanization with aminopropyltriethoxysilane and priming with oxalic acid. The paper described about the compounding of alumina nanofibers leads to increase of the coating strength and an increase in its elasticity. Priming alumina nanofibers by aminopropyltriethoxysilane in toluene leads to its functionalization sufficient to homogenize the nanofibers in the polymer media of the powder paint and improve its product properties. The formation of an amide bond after the final stage of priming of alumina nanofibers in oxalic acid by indirectly method is shown.

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Section: Synthesismentioning

confidence: 99%

Carboxyl-functionalized aluminum oxide nanofibers for powder coatings

Симунин

Chirkov

Samoilo

et al. 2022

J. Phys.: Conf. Ser.

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“…An important anisometric additive is alumina nanofibers [ 12 ], which increase the cohesive energy of polymeric materials. This leads to an increase in the strength of some polymers [ 13 , 14 , 15 ] and nanocomposite coatings [ 16 ]. However, the addition of nanofibers to polymers by itself cannot be effective without matching the surface of alumina nanofibers with the physicochemical properties of the matrix.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Addition of Alumina Nanofibers on the Strength of Epoxy Resins

et al. 2023

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The paper describes the effect of the addition of alumina nanofibers on the mechanical properties of the epoxy resin. Alumina nanofibers functionalized with epoxypropyl functional groups are used in this work. The dependence of the mechanical characteristics on the amount of the additive, as well as the features of its distribution in the material, is investigated. In the work, nanocomposites were obtained, which are epoxy resin with aluminum oxide nanofibers. The mechanical properties of the samples were studied by bending tests and differential mechanical analysis (DMA). It has been shown that the addition of alumina nanofibers leads to an increase in ultimate flexural strength. The maximum of this increase is near the percolation threshold of alumina nanofibers in epoxy resin. With the addition of 0.2% alumina nanofibers, the ultimate flexural strength increases from 41 to 71 MPa. It is shown that after exceeding the percolation threshold of nanofibers, the ultimate strength decreases. In this case, the elastic modulus increases from 0.643 to 0.862 GPa. DMA is shown that the glass transition temperature decreases with increasing amount of the additive. This indicates a decrease in the molecular weight of the polymer. By implication, this suggests that the hardener connects the epoxypropyl functional groups on the nanofibers and the epoxy groups in the resin, and as a result of this process, the nanofibers become natural polymer chain length limiters. The data obtained from mechanical testing and differential mechanical analysis can be used to strengthen epoxy resins in polymer composite materials and molding compositions.

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“…This allows the use of these additives in a wide range of materials. In this case, one should understand exactly how aluminum oxide nanofibers behave after their addition [8][9][10]. On the other hand, it is hydroxyl groups that create hydrogen bonds between alumina nanofibers, which are the strongest of all physical bonds and significantly complicate the separation of alumina nanofibers, which is necessary before introducing them into the target material.…”

Section: Introductionmentioning

confidence: 99%

Study of the distribution morphology of alumina nanofibers in polyester resins

Симунин

Chirkov

Zaloga

et al. 2022

J. Phys.: Conf. Ser.

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In this paper, the morphology of nanocomposite polyester resins has been studied. The basis was polyester resin NH6586 produced by Kinte. Aluminum oxide nanofibers were introduced into the resin, which are single crystals or chains of single crystals with the γ- Al2O3 structure with a diameter of 5 to 15 nm and up to 1 mm in length. The additive was introduced into the resin by the industry standard twin screw extrusion method. At the same time, the influence on the uniformity of distribution of the addition of mineral filler - submicron particles of titanium dioxide - was studied. It has been shown that conventional methods of mixing the additive do not allow the nanofibers to be completely distributed. In such cases, they are distributed in the form of microbundles. The addition of mineralfiller to the polyester resin improves the distribution of the alumina nanofibers so that no bundle inclusions are observed in the resin cleavage. Thus, it can be concluded that mineral additives of isometric particles are an effective homogenizer of aluminum oxide nanofibers in polymeric materials.

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Reinforcement of Protective Coatings Based on Powder Paints with Alumina Nanofibers

Cited by 3 publications

References 11 publications

Carboxyl-functionalized aluminum oxide nanofibers for powder coatings

Carboxyl-functionalized aluminum oxide nanofibers for powder coatings

Influence of the Addition of Alumina Nanofibers on the Strength of Epoxy Resins

Study of the distribution morphology of alumina nanofibers in polyester resins

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