Characterization of polyetheretherketone particle suspensions for electrophoretic deposition

Clavijo S, Membrives F, Boccaccini AR, Santillan MJ (2014)


Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2014

Journal

Book Volume: 131

Article Number: 40953

Journal Issue: 20

DOI: 10.1002/app.40953

Abstract

Suspensions of polyetheretherketone (PEEK) using mixture of ethanol and isopropanol as solvent were prepared to carry out PEEK electrophoretic deposition (EPD). The rheological behavior and suspension structure of PEEK particles dispersed in co-solvents were investigated over a range of pH values (1-10) and shear rates (γ = 10-3 × 10 s ). These PEEK suspensions generally exhibited a pseudoplastic flow behavior, indicating the occurrence of particle aggregation in the liquid medium. The maximum solids fraction (φ) showed an estimated value of φ = 2.9 wt %. Using a suspension with 3 wt % PEEK concentration, PEEK coatings on stainless steel substrates were obtained by EPD at constant voltage condition. The influence of the electrolyte conductivity on PEEK EPD from ethanol-isopropanol suspensions was studied. Experimental results showed that high-conductivity ethanol-based suspensions yield non-uniform deposits, while low-conductivity suspensions resulted in uniform coatings. The difference in the deposition behavior is due to the different pH of the suspensions and the relationship of pH with suspension conductivity. pH = 8 was the optimal value for this system in terms of deposition results. The surfaces of EPD PEEK coatings were homogenous and a qualitatively good adhesion between the PEEK deposits and the substrate was confirmed. © 2014 Wiley Periodicals, Inc.

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APA:

Clavijo, S., Membrives, F., Boccaccini, A.R., & Santillan, M.J. (2014). Characterization of polyetheretherketone particle suspensions for electrophoretic deposition. Journal of Applied Polymer Science, 131(20). https://dx.doi.org/10.1002/app.40953

MLA:

Clavijo, Silvia, et al. "Characterization of polyetheretherketone particle suspensions for electrophoretic deposition." Journal of Applied Polymer Science 131.20 (2014).

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