Characterization of polyetheretherketone particle suspensions for electrophoretic deposition

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 = 101−3 × 102 s−1). These PEEK suspensions generally exhibited a pseudoplastic flow behavior, indicating the occurrence of particle aggregation in the liquid medium. The maximum solids fraction (ϕm) showed an estimated value of ϕm = 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. J. Appl. Polym. Sci. 2014, 131, 40953.

Nanocomposite coatings obtained by electrophoretic co-deposition of poly(etheretherketone)/graphene oxide suspensions

“…However, it has also been used for purification, particle size reduction (in sizes ranging from nano-to micrometres), and development of specific particle morphology [32,33] and sonochemical synthesis [34][35][36]. Despite its benefits, TS has been rarely used in preparing PEEK suspensions for EPD [37][38][39] in comparison with bath ultrasonication [6,[40][41][42][43][44][45][46][47][48][49][50][51][52][53].…”

Study on the stability of high solid content polyether‐ether‐ketone aqueous suspension

“…PEEK suspension has been extensively utilized in various investigations, including wet powder impregnation for the preparation of continuous fiber reinforced PEEK prepreg tape, biocompatible material synthesis containing PEEK, and coating on the fiber surface during composite production. [28][29][30][31] PEEK resin particles are insoluble and exhibit poor dispersion in water, however, they are relatively well dispersed in certain organic solvents. 32,33 Silvia et al 28 prepared a PEEK suspension using a mixture of ethanol and isopropanol as a solvent to enable the subsequent PEEK particles' electrophoretic deposition.…”

The synergistic steric hindrance effect in the preparation of polyether ether ketone composites by powder slurry method

“…Most resin powders have hydrophobicity and are difficult to disperse directly in water. Therefore, it is necessary to add a certain amount of surfactant to achieve uniform dispersion of the powder 24–26 . Surfactants can effectively reduce the interfacial tension between the particles and the solvent.…”

“…The suspension can remain stable for a certain period of time. 27 However, it was found that settlement stratification appeared soon after suspension was standing. In addition, the quantitative analysis of PEEK suspension stability and delamination time is lacking.…”