Mechanical and thermal properties of high volume-fraction carbon nanotube/epoxy composites, and property enhancement by UV ozone treatment of carbon nanotubes,Polymer Composites

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Mechanical and thermal properties of high volume-fraction carbon nanotube/epoxy composites, and property enhancement by UV ozone treatment of carbon nanotubes
Polymer Composites ( IF 4.8 ) Pub Date : 2023-08-23 , DOI: 10.1002/pc.27670
Toshiya Kamae ₁ , Lawrence T. Drzal ₁

Affiliation

A new method to fabricate carbon nanotube/epoxy composites, consisting of well dispersed and highly concentrated CNTs in an epoxy resin, has been developed. In this method, multiwalled carbon nanotubes (MWNTs) were dispersed into water with the assistance of cationic polymers to form a MWNT sheet by filtration. An epoxy resin was impregnated into the MWNT sheet by vacuum assisted impregnation using a filtration system, followed by autoclave cure, resulting in a MWNT/epoxy composite with a MWNT content of 33 wt%. It was revealed that the composite has a tensile modulus of 8.37 GPa and a tensile strength of 130 MPa. An application of a UV ozone (UV/O₃) treatment to the MWNTs increased the XPS O/C ratio from 0.03 to 0.10, resulting in the improvement of the tensile strength to 171 MPa. These results indicate the effectiveness of the UV/O₃ treated MWTNs for mechanical property enhancement.

中文翻译：

高体积分数碳纳米管/环氧树脂复合材料的机械和热性能，以及碳纳米管紫外臭氧处理的性能增强

开发了一种制造碳纳米管/环氧树脂复合材料的新方法，该复合材料由环氧树脂中分散良好且高度浓缩的碳纳米管组成。在该方法中，多壁碳纳米管（MWNT）在阳离子聚合物的帮助下分散到水中，通过过滤形成MWNT片。使用过滤系统通过真空辅助浸渍将环氧树脂浸渍到MWNT片材中，然后高压釜固化，得到MWNT含量为33wt%的MWNT/环氧树脂复合材料。结果表明，该复合材料的拉伸模量为8.37 GPa，拉伸强度为130 MPa。对MWNT进行UV臭氧(UV/O ₃ )处理将XPS O/C比从0.03增加至0.10，从而将拉伸强度提高至171 MPa。_{这些结果表明UV/O 3}处理的MWTN 对于增强机械性能的有效性。

更新日期：2023-08-23

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