一种基于芳香环相互作用的PEEK化学粘合剂
Miki Hori1, Kazuo Ohkuma2, Tatsushi Kawai1
1Department of Dental Materials Science, Aichi Gakuin University School of Dentistry, Japan.
概括
一种新的两部分粘合剂通过利用非共价的π-π相互作用有效地与聚乙基 (PEEK) 结合. 这种新的方法提供了强大的,可靠的粘附,没有激烈的化学处理,推进牙科应用.
科学领域:
- 生物材料科学 生物材料科学
- 聚合物化学 聚合物化学
- 粘合式牙科 粘合式牙科
背景情况:
- 聚乙基 (PEEK) 是一种高性能热塑性塑料,以其出色的化学耐药性和机械性能而闻名,因此适用于牙科和医疗应用.
- 然而,它的惰性表面和半晶体性质对实现可靠的粘合剂粘合提出了重大挑战.
- 目前的方法往往需要积极的表面处理,这可能会损害材料的完整性.
研究的目的:
- 开发一种新的两部分粘合系统,用于与聚乙烯基 (PEEK) 结合.
- 通过非共价 π-π 相互作用准 PEEK 的烯骨干单元并确保链级兼容性来实现强大的粘附性.
- 在不需要激烈的化学预处理的情况下评估粘合剂的性能.
主要方法:
- 候选溶剂和单体被选与PEEK使用差分扫描热度计 (DSC) 进行混合性选.
- 设计了一种两部分粘合剂配方,使用1-vinylimidazole和glycidyl甲基酸盐,以及其他甲基酸盐单体和光启动器系统.
- 使用富里埃变换红外光谱法 (FTIR) 分析了界面化学,并在24小时和2周后在砂喷射的PEEK上测试了微剪断键强度.
主要成果:
- 不同扫描热量计 (DSC) 表明粘合剂组件和PEEK之间的链级兼容性.
- 福里埃变换红外光谱法 (FTIR) 证实了化学相互作用,显示PEEK烯/乙烯波段的减少和环氧环开放产品波段的增加.
- 优化的粘合剂配方在2周内实现了19.3 ± 3.4 MPa的微剪接强度,显著超过商业控制粘合剂.
结论:
- 开发的两部分粘合剂通过利用 π-π 相互作用并实现链级兼容性,成功与 PEEK 结合.
- 这种非侵略性的结合策略为PEEK在粘合性牙科中提供了一个有前途的临床方法.
- 这些发现表明,在进一步验证后,这种粘合系统在其他芳香工程聚合物上有潜在的应用.
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