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Coating of polyamide 12 by sol–gel methodology

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Abstract

The combination of sol–gel methodology with rapid prototyping (RP) produces functionalized 3D structures with potential applications in various fields. However, this combination has been little explored. In this paper, we used the sol–gel method to deposit vanadium isopropoxide onto polyamide (PA12) constructed by RP and pretreated with acetic acid, to obtain a functionalized substrate with new thermal, physical, and chemical properties. Vanadium isopropoxide (one, five, or ten layers) was deposited onto the PA12 piece by dip-coating. We characterized the coated PA12 by thermal analyses, X-ray diffraction, and infrared spectroscopy, which revealed that V=O and Si–O–Si groups exist on the PA12 surface. PA12 coating with vanadium isopropoxide enhanced the decomposition temperature. Differential scanning calorimetry revealed increased fusion and decomposition enthalpy as a function of the PA12 coating. Therefore, deposition of vanadium isopropoxide onto PA12 pretreated with acetic acid improves the thermal stability of PA12 prepared by RP.

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Acknowledgements

The authors acknowledge CNPq and CAPES (Brazilian research funding agencies) for support of this work. B.M. de C. (Grant 2008/09695-3) and E.J.N. (Grant 2012/11673-3) acknowledge grants from the São Paulo Research Foundation (FAPESP).

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Authors and Affiliations

  1. Universidade de Franca, Av. Dr. Armando Salles de Oliveira, Franca, SP, 201-CP.82, CEP 14404 600, Brazil

    Beatriz M. de Campos, Paulo S. Calefi, Katia J. Ciuffi, Emerson H. de Faria, Lucas A. Rocha & Eduardo J. Nassar

  2. Centro de Tecnologia da Informação Renato Archer, Rod. Dom Pedro I, Km 143,6, Campinas, SP, CEP13069-901, Brazil

    Jorge V. L. Silva, Marcelo F. Oliveira & Izaque A. Maia

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  1. Beatriz M. de Campos
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Correspondence to Eduardo J. Nassar.

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de Campos, B.M., Calefi, P.S., Ciuffi, K.J. et al. Coating of polyamide 12 by sol–gel methodology. J Therm Anal Calorim 115, 1029–1035 (2014). https://doi.org/10.1007/s10973-013-3384-9

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