Multifunctional HDPE/Cu biocidal nanocomposites for MEX additive manufactured parts:Perspectives for the defense industry

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外文摘要：In this study,we investigated the performance improvement caused by the addition of copper(Cu)nanoparticles to high-density polyethylene(HDPE)matrix material.Composite materials,with filler percentages of 0.0,2.0,4.0,6.0,8.0,and 10.0 wt％were synthesized through the material extrusion(MEX)3D printing technique.The synthesized nanocomposite filaments were utilized for the manufacturing of specimens suitable for the experimental procedure that followed.Hence,we were able to systematically investigate their tensile,flexural,impact,and microhardness properties through various mechanical tests that were conducted according to the corresponding standards.Broadband Dielectric Spectroscopy was used to investigate the electrical/dielectric properties of the composites.Moreover,by employing means of Raman spectroscopy and thermogravimetric analysis(TGA)we were also able to further investigate their vibrational,structural,and thermal properties.Concomitantly,means of scanning electron micro-scopy(SEM),as well as atomic force microscopy(AFM),were used for the examination of the morphological and structural characteristics of the synthesized specimens,while energy-dispersive X-ray spectroscopy(EDS)was also performed in order to receive a more detailed picture on the structural characteristics of the various synthesized composites.The corresponding nanomaterials were also assessed for their antibacterial properties regarding Staphylococcus aureus(S.aureus)and Escheiichia coli(E.coli)with the assistance of a method named screening agar well diffusion.The results showed that the mechanical properties of HDPE benefited from the utilization of Cu as a filler,as they showed a notable improvement.The specimen of HDPE/Cu 4.0 wt％was the one that presented the highest levels of reinforcement in four out of the seven tested mechanical properties(for example,it exhibited a 36.7％improvement in the flexural strength,compared to the pure matrix).At the same time,the nano-composites were efficient against the S.aureus bacterium and less efficient against the E.coli bacterium.The use of such multi-functional,robust nanocomposites in MEX 3D printing is positively impacting applications in various fields,most notably in the defense and security sectors.The latter becomes increasingly important if one takes into account that most firearms encompass various polymeric parts that require robustness and improved mechanical properties,while at the same time keeping the risk of spreading various infectious microorganisms at a bare minimum.

外文关键词：

High-density polyethylene(HDPE)Copper(Cu)Material extrusion(MEX)Mechanical performanceElectrical propertiesAntibacterialDefense and security

作者：

Nectarios Vidakis、Nikolaos Michailidis、Markos Petousis、Nektarios K.Nasikas、Vassilios Saltas、Vassilis Papadakis、Nikolaos Mountakis、Apostolos Argyros、Mariza Spiridaki、Ioannis Valsamos

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作者单位：

Department of Mechanical Engineering,Hellenic Mediterranean University,Heraklion 71410,Greece

Physical Metallurgy Laboratory,Mechanical Engineering Department,School of Engineering,Aristotle University of Thessaloniki,Thessaloniki 54124,Greece

Centre for Research & Development of Advanced Materials(CERDAM),Center for Interdisciplinary Research and Innovation,Balkan Centre,Thessaloniki 57001,Greece

Division of Mathematics and Engineering Sciences,Department of Military Sciences,Hellenic Army Academy,Vari GR16673,Attica,Greece

Department of Electronic Engineering,Hellenic Mediterranean University,Chania 73133,Greece

Department of Industrial Design and Production Engineering,University of West Attica,Athens 12244,Greece

Institute of Electronic Structure and Laser,Foundation for Research and Technology-Hellas,Heraklion 70013,Greece

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出版年：

2024

DOI：

10.1016/j.dt.2024.03.004

防务技术

中国兵工学会

防务技术

CSTPCD

影响因子：0.358

ISSN：2214-9147

年,卷(期)：2024.38(8)