Flexural and shear properties of CFRP laminates reinforced with functionalized multiwalled CNTs

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, COMPOSITES

Nanocomposites Pub Date : 2021-01-02 DOI:10.1080/20550324.2021.1961507

G. Tefera, G. Bright, S. Adali

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引用次数: 8

Abstract

Abstract This study focuses on mechanical characterization of carbon fiber reinforced polymer (CFRP) laminates reinforced with non-treated and treated multiwalled carbon nanotubes (CNTs) using nitric acid. The CNTs were treated using nitric acid to obtain carboxylic functional group. The epoxy resins are mixed with 0.3%wt of multiwalled CNTs at a constant mixing speed of 2000 rpm and mixing times varied from 24 to 96 h. Laminates reinforced with treated multiwalled CNTs show an increase in the flexural strength by 17.4 and 15.3% at mixing times of 24 and 96 h as compared to control laminates. The test results indicated that laminates reinforced with treated multiwalled CNTs have improved interlaminar shear failure stress which is 14 and 7% higher at mixing times of 24 and 96 h as compared to control specimen. Improvement in behavior was achieved for functionalized CNTs based laminates which prevents agglomeration. Longer mixing time (96 h) is not beneficial for enhancing the mechanical properties due to the break-up of small aggregates by overcoming the effect of van der Waals forces. Graphical Abstract

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功能化多壁碳纳米管增强CFRP复合材料的弯曲和剪切性能

摘要本研究主要研究了未经处理和处理过的多壁碳纳米管(CNTs)增强碳纤维增强聚合物(CFRP)层压板的力学性能。用硝酸处理CNTs得到羧基官能团。将环氧树脂与0.3%wt的多壁碳纳米管混合，搅拌速度为2000 rpm，搅拌时间为24 ~ 96 h。与对照层压板相比，经处理的多壁CNTs增强的层压板在混合时间为24和96 h时的抗弯强度分别提高了17.4%和15.3%。试验结果表明，经处理的多壁碳纳米管增强的层压板在搅拌24和96 h时的层间剪切破坏应力分别比对照试样高14%和7%。功能化碳纳米管基层压板的性能得到了改善，防止了团聚。较长的混合时间(96 h)不利于克服范德华力的影响而使小集料破碎，从而提高其力学性能。图形抽象

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来源期刊

Nanocomposites Multiple-

CiteScore

7.40

自引率

15.20%

发文量

审稿时长

16 weeks