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工程晶体架构的增强性质在快速处理的聚乙乙 (PEEK) 纳米复合材料的性能

Behrooz Shirani Bidabadi¹, Emile Motta de Castro², Mia Carrola³

¹Department of Engineering Technology and Industrial Distribution, Texas A&M University, College Station, Texas 77843-3367, United States.

ACS applied engineering materials

|August 29, 2024

概括

纤维素纳米晶体 (CNCs) 和石墨烯纳米板块 (GNPs) 增强了聚乙烯 (PEEK) 的纳米复合材料性能. 混合系统可以提高机械性能,即使是在快速冷却的制造工艺下.

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:

制造过程中的快速冷却限制了半晶聚合物纳米复合物的晶度和机械性能.
结晶受核形成,链流动性和时间的影响,但结晶形态也会影响性能.

研究的目的:

研究如何使用纤维素纳米晶 (CNC) 和石墨烯纳米血板 (GNP) 混合系统修改球状石形态会影响聚乙 (PEEK) 纳米复合材料的机械性能.
探索CNC和GNP在极端冷却速度 (快速和缓慢) 下在PEEK纳米复合材料中的作用.

主要方法:

开发了一种可扩展的基于水的分散方法,用于PEEK,CNC和GNP.
在快速 (460°C/分钟) 和缓慢 (0.7°C/分钟) 的冷却速度下,使用CNC和CNC:GNP系统评估PEEK纳米复合材料.
分析了结晶度,抗拉强度和抗拉模块的变化.

主要成果:

CNC显著影响了PEEK的晶体架构和机械性能,通过格子匹配表明了关键的表面相互作用.
在快速冷却中,CNC和CNC:GNP系统最大限度地降低了拉伸强度的减少,并保持了拉伸模量.
在缓慢冷却中,CNC:GNP加法提高了强度约10%和模量约16%.

结论:

混合纳米材料系统可以定制PEEK的晶体微观结构.
这种方法为提高PEEK纳米复合材料在快速制造过程中的机械性能提供了一个有希望的策略.

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