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高模量,状聚 ((乙)) 气凝由良性溶剂制成

Glenn A Spiering¹, Garrett F Godshall¹, Robert B Moore¹

¹Department of Chemistry, Macromolecules Innovation Institute, Virginia Tech, Blacksburg, VA 24061, USA.

Gels (Basel, Switzerland)

|April 26, 2024

概括

这项研究为使用1,3-二乙 (DPA) 作为良性溶剂形成的聚乙乙 (PEEK) 气凝引入了一种新的状形态. 这些PEEK气凝具有增强的机械性能和高效的承载能力.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
纳米技术纳米技术

背景情况:

聚乙烯 (PEEK) 是一种高性能热塑性塑料,具有出色的机械和热性能.
气凝是具有广泛应用的高度多孔材料,但它们的机械性能可能是有限的.
开发新的方法来制造具有改进特性的PEEK气凝具有重大意义.

研究的目的:

为了研究PEEK在1,3-二乙 (DPA) 中的凝,并描述由此产生的气凝形态.
评估使用DPA制备的PEEK气凝的物理和机械性能.
为了比较DPA衍生PEEK气凝的特性与从其他溶剂中获得的特性.

主要方法:

在高温 (320°C) 下在DPA中溶解PEEK,然后进行受控冷却 (50°C),以诱导凝.
从DPA到水的溶剂交换,然后冷干燥以制备PEEK气凝.
使用吸附,扫描电子显微镜 (SEM) 和X射线散射进行表征.

主要成果:

在PEEK气凝中首次观察到一种由PEEK轴体组成的新型相互连接的,类似杆形态.
PEEK气凝的密度介于0.09-0.25g/cm3,孔隙度为80-93%,表面积为200-225m2/g.
与其他溶剂的气凝相比,这种类似杆的形态学导致了显著改善的机械性能,包括增强的模量密度缩放和承载能力.

结论:

1,3-二乙 (DPA) 是一种良性溶剂,可以形成具有独特的状形态的PEEK凝.
这种新型形态赋予PEEK气凝卓越的机械强度和承载效率.
这些发现为开发用于苛刻应用的基于PEEK的先进气凝提供了有希望的途径.

关键词:

汉森溶解度参数汉森溶解度参数在X射线散射过程中,X射线的散射气凝是一种空气凝.亚齐亚利特是一种亚齐亚利特层次的形态结构结构.聚乙 (聚乙) 是一种聚乙.半晶聚合物气凝半晶聚合物气凝溶剂溶剂溶剂

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