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Novel Carboxylation Method for Polyetheretherketone (PEEK) Surface Modification Using Friedel-Crafts Acylation
Xinghui Lyu1, Ryuhei Kanda2, Susumu Tsuda3
1Department of Fixed Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuhahanazonocho, Hirakata 573-1121, Osaka, Japan.
International Journal of Molecular Sciences
|November 14, 2023
Summary
Researchers developed a new method to carboxylate polyetheretherketone (PEEK) surfaces for dental applications. This surface modification enhances PEEK
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Polyetheretherketone (PEEK) shows potential for dental applications but requires surface treatment due to poor surface energy and wettability.
- Current effective surface treatment methods for PEEK remain debated.
- Developing reliable surface modification techniques is crucial for optimizing PEEK's performance in dental settings.
Purpose of the Study:
- To carboxylate polyetheretherketone (PEEK) surfaces using Friedel-Crafts acylation.
- To investigate the feasibility of further chemical modifications on the carboxylated PEEK surface.
- To evaluate the surface properties of PEEK after sequential chemical modifications.
Main Methods:
- PEEK samples were treated via Friedel-Crafts acylation with succinic anhydride and aluminum bromide (AlBr3).
- Carboxylated PEEK surfaces underwent dehydration-condensation reactions with 1H,1H-pentadecafluorooctylamine and N,N'-dicyclohexylcarbodiimide.
- Surface properties were analyzed using spectroscopy (FTIR) and elemental analysis (XPS) at each stage.
Main Results:
- Spectroscopic analysis confirmed the presence of carboxyl groups (COOH) and an associated absorption band (3300-3500 cm-1) on the PEEK surface after acylation.
- Secondary modification successfully reduced the initial absorption band and introduced a distinct fluorine (F1s) signal, indicating successful functionalization.
- The results demonstrate the successful introduction and subsequent modification of carboxyl groups on PEEK surfaces.
Conclusions:
- Friedel-Crafts acylation with succinic anhydride is an effective method for carboxylating PEEK surfaces.
- The introduced carboxyl groups can be further chemically modified through dehydration-condensation reactions.
- This sequential reaction strategy allows for the tailored impartation of specific chemical structures onto PEEK surfaces for enhanced properties.
Keywords:
carboxyl groupchemical modificationfriedel–crafts acylationpentadecafluorooctylamidepolyetheretherketoneMore Related Videos
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