Surface Modification of Poly(ether ether ketone) through Friedel-Crafts Reaction for High Adhesion Strength
Surface Modification of Poly(ether ether ketone) through Friedel-Crafts Reaction for High Adhesion Strength
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DOI：
10.1021/acs.langmuir.9b00641
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发表时间：
2019-07-30
期刊：
影响因子：
3.9
通讯作者：
Nishino, Takashi
中科院分区：
文献类型：
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作者：
Miyagaki, Akira;Kamaya, Yusuke;Nishino, Takashi
聚醚醚酮 (PEEK) 具有吸引人的机械和热性能，但粘合性较差。为了克服这一缺点，本研究通过 Friedel Crafts 反应和连续环氧化对 PEEK 或 PEEK 基碳纤维增强热塑性塑料 (CFRTP) 进行表面改性。在优化的反应条件下，在没有表面劣化的情况下实现了表面改性，并引入了环氧基团。分别通过硫醇反应和胺加成进行氟标记后，通过 X 射线光电子能谱测量证明了 Friedel Crafts 反应和环氧化的进展。 CFRTP与环氧粘合剂之间的粘合强度提高至23.5 MPa，并且环氧粘合剂发生内聚断裂，而不是界面剥离。另外，与传统的等离子体处理相比，改性表面的耐久性和改性表面层的厚度有所增加。因此，我们通过对PEEK表面进行环氧化，成功地改变了表面性能。
Poly(ether ether ketone) (PEEK) possesses attractive mechanical and thermal properties but demonstrates poor adhesion. To overcome this disadvantage, in this study, the surface modification of PEEK or PEEK-based carbon-fiber-reinforced thermoplastics (CFRTP) was performed through the Friedel Crafts reaction and successive epoxidation. Under optimized reaction conditions, surface modification was achieved without surface deterioration, and epoxy groups were introduced. The progress of the Friedel Crafts reaction and epoxidation was demonstrated by X-ray photoelectron spectroscopy measurements after fluorine labeling through thiol en reaction and amine addition, respectively. The adhesive strength between CFRTP and epoxy adhesives was increased to 23.5 MPa, and cohesive fracture of epoxy adhesives, rather than interfacial peeling, occurred. In addition, compared with conventional plasma treatment, the durability of the modified surface and thickness of the modified surface layer increased. Therefore, we succeeded in modifying the surface properties through the epoxidation of the PEEK surface.