微等离子修饰聚合物的衰老:水友性的作用
Chang Che1, Behnam Dashtbozorg1, Shaojun Qi1
1School of Metallurgy & Materials, University of Birmingham, Birmingham B15 2SE, UK.
Materials (Basel, Switzerland)
|March 28, 2024
概括
大气中的μPlasma处理增强了热塑性聚合物表面能量,改善了粘附性. 然而,随着时间的推移,由于聚合物老化,这种效应会减弱,聚胺比聚乙烯放松得更快.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 表面工程是什么?表面工程是什么?
背景情况:
- 热塑性聚合物具有较低的表面能量,导致粘附性差.
- 等离子体表面修饰可以增强聚合物表面特性.
- 功能化聚合物表面是改善粘合的关键.
研究的目的:
- 评估一种新的大气μPlasma技术用于表面修饰.
- 评估μPlasma处理对聚合物表面能量的影响.
- 研究处理过的聚合物表面的老化现象.
主要方法:
- 对HDPE,PA12和PA6.6进行了应用大气μPlasma表面处理.
- 测量接触角度以确定表面能量变化.
- 利用原子力显微镜 (AFM) 来研究表面形态.
- 采用红外光谱仪进行表面功能化分析.
- 使用修改后的Kohlrausch-Williams-Watts (KWW) 模型建模了衰老过程.
主要成果:
- 等离子处理显著减少了接触角度,表明表面能量增加.
- 接触角的减少为47.3° (HDPE),42.6° (PA12) 和50.1° (PA6).
- 观察到明显的衰老现象,随着时间的推移减少了治疗的有效性.
- 老化速率与聚合物水友性相关;聚胺老化速度比聚乙烯快.
结论:
- 大气μPlasma处理在增加热塑性聚合物表面能量方面是有效的.
- 表面修改的好处是暂时的,这是由于放松/老化过程.
- 聚合物的水友性会影响处理后表面衰老的速度.
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