The Carnation Coat

Chen, Chanjuan; Lapolla, Kendra

doi:10.31274/itaa_proceedings-180814-205

Cited by 3 publications

(5 citation statements)

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“…This solves the complicated process of traditional composite coating and improves the environmental adaptability of combustible cartridges. Fluoropolymer-inorganic nanocomposites [8][9][10] not only have good physical properties, such as high hardness and high strength of inorganic materials, but also have low surface free energy [11][12][13] and thermal stability of fluoropolymer materials [14]. At the same time, fluorinecontaining composites have been used to prepare superhydrophobic surfaces [15][16][17], which provides a method to address the problem of water absorption of combustible cartridges.…”

Section: Introductionmentioning

confidence: 99%

Retracted: A novel composite coating to improve the environmental adaptability of combustible cartridges

Chen

2018

Polymer Composites

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The combustible cartridge, as a kind of porous composite material, is easy to absorb moisture, thus affecting its combustion performance. Generally, storage and protection methods of a combustible cartridge are based on multilayer coatings. Nevertheless, it makes the coating process more expensive and complex by increasing the number of coatings layers. In this article, poly (trifluoroethyl methacrylate) was grafted onto the surface of the nano‐size titanium dioxide particles. The fluorine‐containing nanocomposite material and nitrocellulose varnish were used as the film‐forming material of a composite coating. Additives polyvinyl alcohol and polysorbate were separately used as an antistatic agent and surfactant. The final formula of coating was determined. Eventually, the multifunctional coating was deposited on the surface of a combustible cartridge using a spraying method to form the composite coating, and the preparation parameters of the composite coating were determined. Results demonstrate that the varnish‐fluoropolymer composite coating on the surface of combustible cartridge can improve the environmental adaptability and mechanical properties. Furthermore, the composite coating has no negative effects on the combustion performance of combustible cartridge, indicating a promising application in the coating of combustible cartridge to improve its environment adaptability. POLYM. COMPOS., 40:695–703, 2019. © 2018 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Retracted: A novel composite coating to improve the environmental adaptability of combustible cartridges

Chen

2018

Polymer Composites

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“…This solves the complicated process of traditional composite coating and improves the environmental adaptability of combustible cartridges. Fluoropolymer-inorganic nanocomposites [9][10][11][12] not only have good physical properties, such as high hardness and high strength of inorganic materials, but also have low surface free energy [13][14][15] and thermal stability of fluoropolymer materials [16][17][18][19]. At the same time, fluorine-containing composites have been used to prepare super-hydrophobic surfaces [20][21][22][23], which provides a method to address the problem of water absorption of combustible cartridges.…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of a composite coating to improve the environmental adaptability of combustible cartridges

Chen

Shi

Tian³

et al. 2018

Polymer Composites

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A combustible cartridge is a kind of porous composite material. It absorbs moisture easily, thus affecting its combustion performance. Usually, storage and protection methods of a combustible cartridge are based on multilayer coatings. However, increasing the number of coatings layers makes the coating process more complex and expensive. In this article, nano‐size titanium dioxide (TiO2) particles were grafted with poly (trifluoroethyl methacrylate). The fluorine‐containing nanocomposite material was used with nitrocellulose as the film‐forming material of a composite coating. Additives polysorbate and polyvinyl alcohol (PVA) were separately used as a surfactant and antistatic agent. The final formula of coating was determined. Eventually, the multifunctional coating was deposited on the surface of a combustible cartridge using a spraying method to form the composite coating, and the preparation parameters of the composite coating were determined. Results demonstrate that the binary mixed solvent‐fluoropolymer composite coating on the surface of combustible cartridge can improve the mechanical properties and environmental adaptability. Moreover, the composite coating has no negative effects on the combustion performance of combustible cartridge, indicating a promising application in the coating of combustible cartridge to improve its environment adaptability. POLYM. COMPOS., 40:685–694, 2019. © 2018 Society of Plastics Engineers

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“…The attempts directed to the explanation of DMC catalytic properties are based on the experimental verification of the hypothesis that this activity is determined by the properties of Me 1 metal (Zn) through the formation of coordination bond with organic co-ligand oxygen atom, which is weaker than a strong Zn-NC one. [2][3][4][5][6][7][8][9] It seems to be justified both in light of the coordination properties of Zn [10] and considering the commonly known stability of hexacyanometallate ion. [11] Unfortunately, no satisfactory explicit experimental data on the structural nature of the active centers of DMC catalysts have been communicated until now.…”

Section: Introductionmentioning

confidence: 99%

“…Results of the application of XRD have been described in the works of Kim and colleagues. [4][5][6][7][8][9][12][13][14][15] XRD method allowed to follow changes in the crystal structure of DMC catalysts during the different processes used for catalyst preparation and to look for a relationship between the formation of different phases and catalyst activity. [16] The influence of the way how an organic ligand was introduced on the crystal structure and activity was also studied by XRD.…”

Section: Introductionmentioning

confidence: 99%

“…Although some characteristic absorption ranges have been found, corresponding to the specific valence vibrations ν (C ≡ N), ν (Co-C), and some subtle frequency shifts connected mainly with the crystalline phase properties have been noticed, not any explicit evidences for the presence of catalytic centers have been found. [4][5][6][7][8][14][15][16] The promising direction of experimental research of DMC catalysts active centers occurs to be the X-ray absorption spectroscopy (XAS), due to its sensitivity on the closest atomic neighborhood of examined elements regardless of amorphous or crystalline surroundings. Some interesting promises seem to arise from the XPS studies results.…”

Section: Introductionmentioning

confidence: 99%

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Structural properties and chemical bonds in double metal cyanide catalysts

et al. 2015

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Double metal cyanide (DMC) catalysts are commonly applied at industrial ring-opening polymerization of the epoxides, being the initial stage of the polyurethanes manufacturing route. This group of catalysts is frequently used in industry, but the knowledge on the molecular nature of their high activity and selectivity is limited to some phenomenological hypotheses based on overall chemical premises. To shine some light on the relation between structural and chemical properties of DMC catalysts and their activity, the complementary X-ray powder diffraction, X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy and X-ray absorption spectroscopy studies were performed. The comprehensive characterization of DMC catalyst synthesized from ZnCl 2 and potassium hexacyanocobaltate(III) solution, in presence of the organic ligand ( t BuOH), confirmed that a significant part of the catalyst material reveals the features of the non-crystalline structure. Extended X-ray absorption fine structure (EXAFS) analysis established that only Zn atoms are the active metallic centers in the DMC catalyst. The coordination around Zn was changed from octahedral in reference material to tetrahedral in catalysts, and Cl atoms were detected near some of the Zn atoms, but no significant amount of oxygen atoms was detected, which agrees with XPS chemical analysis. The performed experimental studies give direct experimental evidence for the model deduced by Zhang et al., and for the calculation performed by Wojdeł et al. Moreover, the generally accepted formula Zn 3 [Co(CN) 6 ] 2 • xZnCl 2 • ytBuOH • zH 2 O describing this catalyst is not valid, because none of the compounds were detected by XRD or EXAFS techniques.Regarding the relation between structural and chemical activity of catalyst, we conclude that for the chemical activity of DMC catalyst not only is the content of Cl very important, but also the fraction of non-crystalline phase, the formation of which is stimulated by ligand. The non-crystalline fraction of catalyst may offer the easier access to the active center with Cl. Results and discussion X-ray diffractionTrizinc bishexacyanocobaltate(III), used as a reference material, has been reported to be dimorphic, cubic (Fm-3 m) and rhombohedral Catalytic centre in double metal cyanide catalysts

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The Carnation Coat

Cited by 3 publications

References 0 publications

Retracted: A novel composite coating to improve the environmental adaptability of combustible cartridges

Retracted: A novel composite coating to improve the environmental adaptability of combustible cartridges

Design and fabrication of a composite coating to improve the environmental adaptability of combustible cartridges

Structural properties and chemical bonds in double metal cyanide catalysts

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