EK and andSBF 50C-PEEK.(denoted as “1d”) for (a) pure PEEK
EK and andSBF 50C-PEEK.(denoted as “1d”) for (a) pure PEEK and (b) 50C-PEEK.(a) (a)three SO PO4PO4 SO42-3-2-(b) (b)PO 3PO3-SO4 SO42-2-Transmittance / a.u.Transmittance / a.u.N SN S SPTransmittance / / a.u. a.u. TransmittanceN S SP1d SP SNSP(SPA)0d 0d (SPA) 1d0d (SPA) 0d1d(SPA) 1dWavenumber 1000WavenumberFigure six. FT-IR spectra around the surface of Samples N: untreated PEEKs, S: sulfuric acid-treated PEEKs, FigureSP:FT-IR spectra onoxygen plasma-treated PEEKs, and SPA: sulfuric acid + oxygen PEEKs, SP: sulfuric acid + 6. sulfuric acid + the surface of Samples N: untreated PEEKs, S: sulfuric acid-treated plasma + modifiedoxygen plasma-treated PEEKs, and(denoted as “0d”) and soon after immersion in SBF for 1 day (denoted as(denoted as SPA: sulfuric modified-SBF-treated PEEKs SBF-treatedon the surface of Samples N:acid + oxygen plasma +sulfuric acid-treated PEEKs, before “1d”) Figure six. FT-IR spectra PEEKs ahead of untreated PEEKs, S: SP: sulfuric acid + “0d”) and soon after immersion in SBF for 1 day (denoted as “1d”) for (a) pure PEEK and (b) 50C-PEEK. for (a) pure PEEK and SPA: sulfuric acid + oxygen plasma + modified-SBF-treated PEEKs ahead of (denoted as oxygen plasma-treated PEEKs,and (b) 50C-PEEK. “0d”) and immediately after immersion in SBF for 1 day (denoted as “1d”) for (a) pure PEEK and (b) 50C-PEEK. four. DiscussionWavenumberWavenumberThese benefits indicated that the pure PEEK and the 50C-PEEK treated with H2 SO4 for Within this the formation4. Discussion oxygen plasma for the treated the pure PEEK hydrophilicity, and H2SO4. with the pores, study, the authors firstly introduction in the and the 50C-PEEK with As currently reported, pores formation on the surfaces of different forms of PEEKs was obsubsequently the modified-SBF the authors firstly treated the pure PEEK and also the 50C-PEEK with H2SO4 Within this study, for the precipitation in the apatite nuclei showed formation served in SEM micrographs [202]. Furthermore, a related phenomenon was observed even capacity with the apatitic phase withinpores formation around the surfaces of many sorts of PEEKs was ob As already reported, 1 day inside the SBF.served in SEM micrographs the PEEKMoreover, a similar phenomenon was observed This expected to be brought on by [202]. Pyridoxatin Technical Information matrix no matter the presence of carbon fibers. even four. Discussionin the case from the 50C-PEEK in the present study. Hence, the reaction to type pores wa phenomenon was believed to be brought on by the reaction amongst the aromatic groups of In this study,the aromatic compounds andthe matrix no matter 250C-PEEK with H2 SOfibers. Thi the to be caused by the PEEK sulfonic groups the SO as follows carbon four . expectedauthors firstly treated thepure PEEK andof Hthe 4presence of[28]. As currently reported, pores formation to become triggered by the reaction between the aromatic groups o phenomenon was believed around the surfaces of several kinds of PEEKs was observed in SEMaromatic compounds as well as the sulfonicsimilar phenomenon was observed the micrographs [202]. In addition, a groups of H2SO4 as follows [28].inside the case of your 50C-PEEK in the present study. Therefore, the reaction to form pores waseven within the case in the 50C-PEEK in the present study. Therefore, the reaction to kind pores was expected to become triggered by the PEEK matrix regardless of the presence of carbon fibers.Supplies 2021, 14,ten ofThis phenomenon was thought to become brought on by the reaction between the aromatic groups in the aromatic compounds as well as the sulfonic groups of H2 SO4 as follows [28]. C6 H6 + H2 SO4 C6 H5 SO3 H + H2 O (1)The outcomes o.