Protective coating materials on nylon substrate by sol–gel

Campos, Beatriz M. de; Bandeira, Lucimara C.; Calefi, Paulo S.; Ciuffi, Kátia J.; Nassar, Eduardo J.; Silva, J. V. L.; Oliveira, Marcelo Fernandes de; Maia, Ivan Ferrer

doi:10.1080/17452759.2010.491938

Cited by 12 publications

(10 citation statements)

References 21 publications

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“…In a previous work, we had observed that the decomposition temperature of the ABS polymer increased after coating with different compositions of sols. 23,24 Indeed, in the present work the decomposition temperature maximum changed from 417°C for ABS alone to 429 and 421°C for the ABS (ac.) complex and the ABS (bc.)…”

Section: Photoluminescence (Pl)mentioning

confidence: 87%

Ultraviolet sensors using a luminescent europium (III) complex on acrylonitrile butadiene styrene polymer

et al. 2012

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In this article, the sol-gel methodology was used for coating an acrylonitrile butadiene styrene (ABS) polymer prepared by the rapid prototyping technology with a colloid containing the europium III dipicolinic complex, which presents high emission when excited in the ultraviolet region. Either acid or base was used for treatment of the ABS polymer, with a view to activating its surface. The thermal analysis evidenced a residual mass after 600°C, which indicated that the coating adhered to the substrate. X-ray diffraction analysis showed that the structure of the ABS polymer was not affected by the sol-gel treatment. The large band centered at 287 nm, ascribed to ligand-metal charge transfer, can be used to excite the europium III dipicolinic complex in the ultraviolet C and ultraviolet B regions. The emission appears in the characteristic red region of the electromagnetic spectrum. These results indicate that the obtained material is a candidate for use as ultraviolet sensor.

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Section: Photoluminescence (Pl)mentioning

confidence: 87%

Ultraviolet sensors using a luminescent europium (III) complex on acrylonitrile butadiene styrene polymer

et al. 2012

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“…Outras bandas podem também ser observadas no espectro em 1454 (dNC'H), 1384 (dCH), 1298 (nCN), 1100 e 1064 (nCC), 936 (nNC), e 635 cm -1 (dOCN). 16,38,39…”

Section: Espectroscopia De Absorção Ramanunclassified

“…As temperaturas máximas de decomposição sofreram aumento de 442 o C para a PA, 444 o C PA+Ox e 448 o C PA+Ox+PI, indicando a influência na estabilidade térmica da membrana de PA, propriedade observada na literatura. 13,15,16 A Figura 9 mostra as curvas DSC para das membranas de PA, PA+Ox e PA+Ox+PI.…”

Section: Análise Térmica Termogravimetria (Tga) E Sua Derivada (Dtg)unclassified

ÓXIDO DE ÍTRIO E ALUMÍNIO DOPADO COM Yb3+ E Er3+ INCORPORADO EM MEMBRANA DE POLIAMIDA

Souza¹,

Moscardini²,

Faria³

et al. 2018

Quim. Nova

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YTTRIUM ALUMINUM OXIDE DOPED WITH Yb 3+ AND Er 3+ INCORPORATED INTO POLYAMIDE MEMBRANE. Lanthanide ions have special light emission, which can occur through descending and ascending energy conversion. Ascending energy conversion is especially interesting for bioapplications because excitation in the infrared region does not excite biomolecules and therefore does not interfere in detection, not to mention that it penetrates deeper in the skin. Here, we synthesized yttrium and aluminum oxide doped with Yb 3+ and Er 3+ ions via the non-hydrolytic sol-gel methodology. The doped matrix was incorporated and dispersed over a polyamide membrane obtained by Additive Manufacturing. X-ray diffraction revealed that a mixture of yttrium aluminum monoclinic and garnet phases emerged. Upon excitation at 980 nm in the Yb 3+ ion, the Er 3+ presented more intense emission as a function of the laser power, which favored red emission. The intensities of the bands corresponding to the 4 S 3/2 → 4 I 15/2 (563 nm) and 5 F 9/2 → 4 I 15/2 (660 nm) transitions involved the absorption of two photons. The oxide incorporated into the polyamide membrane presented the same behavior. After coating with polyetherimide, the latter system was resistant to 5.1 W laser, which paves the way for new applications.

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“…After 2 h of agitation, the sol was deposited onto PA by dip-coating, as described in literature. 23 The substrates remained in the sols for 20 min, followed by drying at 50° C for 1 day.…”

Section: Polyamide Coatingmentioning

confidence: 99%

Effect of calcium phosphate coating on polyamide substrate for biomaterial applications

Bandeira¹,

Ciuffi²,

Calefi³

et al. 2012

J. Braz. Chem. Soc.

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Um novo material a base de poliamida revestida com fosfato de cálcio foi desenvolvido visando potencial aplicação como biomaterial. O revestimento foi obtido pelo método sol-gel e o fosfato de cálcio foi obtido após contato com solução de fluído corpóreo. A poliamida revestida (antes e depois de contado com fluído corpóreo) foi caracterizada através de análises termogravimétrica e térmica diferencial (TGA/DTA), calorimetria diferencial de varredura (DSC), microscopia eletrônica de varredura (SEM) e espectrometria de reflexão total atenuada no infravermelho com transformada de Fourier (ATR-FTIR). As caracterizações revelaram a formação de fosfato de cálcio com uma espessura menor que 3 µm, o que proporcionou um aumento no ponto de fusão além de melhorar a estabilidade térmica da poliamida. Após contato com o fluído corpóreo, as interações entre o revestimento e o substrato se mantiveram, e houve formação de fosfatos cristalinos e amorfos na superfície de poliamida. A new type of material from polyamide coated with calcium phosphate was developed aiming to have potential application as biomaterial. Coating was obtained by the sol-gel method and calcium phosphate was obtained after contact with body fluid solution. The coated polyamide (before and after contact with body fluid solution) was characterized by thermogravimetric and differential thermal (TGA/DTA) analyses, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). These characterizations revealed that the calcium phosphate coating has a thickness of less than 3 µm, which resulted in an increase in the melting point and improved the thermal stability of polyamide. After contact with body fluid, the interactions between the coating and the substrate remained, and there was formation of crystalline and amorphous phosphates on polyamide surface.

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Protective coating materials on nylon substrate by sol–gel

Cited by 12 publications

References 21 publications

Ultraviolet sensors using a luminescent europium (III) complex on acrylonitrile butadiene styrene polymer

Ultraviolet sensors using a luminescent europium (III) complex on acrylonitrile butadiene styrene polymer

ÓXIDO DE ÍTRIO E ALUMÍNIO DOPADO COM Yb3+ E Er3+ INCORPORADO EM MEMBRANA DE POLIAMIDA

Effect of calcium phosphate coating on polyamide substrate for biomaterial applications

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