Evaluation of the Piezoresistive Response of GFRP with a Combination of MWCNT and GNP Exposed to Seawater Aging

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Applied Composite Materials Pub Date : 2023-11-27 DOI:10.1007/s10443-023-10175-z

Eduardo José-Trujillo, Carlos Rubio-González, Julio Alejandro Rodríguez-González

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Abstract

The purpose of this work was the evaluation of electrical conductivity and piezoresistive response of seawater aged glass fiber/epoxy composites (GF/E) with the incorporation of multiwall carbon nanotubes (MWCNTs), graphene nanoplatelets (GNPs) and their hybrid combination (MWCNT/GNP) at two mixing ratios (7:1 and 3:1). Seawater exposure leads to the phenomenon of moisture absorption in GF/E, which negatively affected their bending properties, causing a higher susceptibility to damage mechanisms related to matrix cracking, fiber/matrix interfacial debonding and delamination. However, the addition of MWCNT/GNP hybrids to the GF/E composites induced a positive effect on the electrical response resulting in improved piezoresistive properties (strain sensitivity) and damage sensing under monotonic flexural loading. The results of piezoresistive response experiments also confirmed excellent strain sensing capabilities under cyclic loading condition for both unaged and aged composites, demonstrating the efficiency of using the hybrid combination of MWCNTs and GNPs for electrical sensing applications of composite structures in seawater aged conditions. It was found that the 3:1 mixing ratio allowed better electrical performance of GF/E composites and piezoresistive capability was preserved even after sea water aging.

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海水老化下MWCNT和GNP复合GFRP压阻响应的评价

本研究的目的是评估掺入多壁碳纳米管(MWCNTs)、石墨烯纳米片(GNPs)及其混合组合(MWCNT/GNP)的海水老化玻璃纤维/环氧复合材料(GF/E)在两种混合比例(7:1和3:1)下的电导率和压阻响应。海水暴露导致GF/E的吸湿现象，这对其弯曲性能产生负面影响，导致其更容易受到基体开裂、纤维/基体界面脱粘和分层等损伤机制的影响。然而，在GF/E复合材料中加入MWCNT/GNP杂化体对电响应产生了积极的影响，从而改善了单调弯曲载荷下的压阻性能(应变灵敏度)和损伤传感。压阻响应实验结果也证实了未老化和老化复合材料在循环加载条件下的优异应变传感能力，证明了MWCNTs和GNPs混合组合在海水老化条件下复合材料结构电传感应用的有效性。结果表明，在3:1的混合比例下，GF/E复合材料的电学性能较好，即使在海水老化后也能保持压阻性能。

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来源期刊

Applied Composite Materials 工程技术-材料科学：复合

CiteScore

4.20

自引率

4.30%

发文量

审稿时长

1.6 months

期刊介绍： Applied Composite Materials is an international journal dedicated to the publication of original full-length papers, review articles and short communications of the highest quality that advance the development and application of engineering composite materials. Its articles identify problems that limit the performance and reliability of the composite material and composite part; and propose solutions that lead to innovation in design and the successful exploitation and commercialization of composite materials across the widest spectrum of engineering uses. The main focus is on the quantitative descriptions of material systems and processing routes. Coverage includes management of time-dependent changes in microscopic and macroscopic structure and its exploitation from the material''s conception through to its eventual obsolescence.