Enhanced engineering and biocidal polypropylene filaments enabling melt reduction of AgNO_(3) through PVP agent:A scalable process for the defense industry with MEX additive manufacturing  

作　　者：Markos Petousis Nikolaos Michailidis Vassilis Papadakis Apostolos Argyros Mariza Spiridaki Nikolaos Mountakis John Valsamos Nektarios K.Nasikas Amalia Moutsopoulou Nectarios Vidakis 

机构地区：[1]Department of Mechanical Engineering,Hellenic Mediterranean University,Heraklion 71410,Greece [2]Physical Metallurgy Laboratory,Mechanical Engineering Department,School of Engineering,Aristotle University of Thessaloniki,Thessaloniki 54124,Greece [3]Centre for Research&Development of Advanced Materials(CERDAM),Centre for Interdisciplinary Research and Innovation,Balkan Centre,Building B’,10th Km Thessaloniki-Thermi Road,Thessaloniki 57001,Greece [4]Institute of Electronic Structure and Laser of the Foundation for Research and Technology-Hellas(IESL-FORTH)e Hellas,N.Plastira 100m,Heraklion 70013,Greece [5]Department of Industrial Design and Production Engineering,University of West Attica,Athens 12243,Greece [6]Division of Mathematics and Engineering Sciences,Department of Military Sciences,Hellenic Army Academy,GR 16673,Vari,Attica,Greece

出　　处：《Defence Technology(防务技术)》2025年第2期52-66,共15页Defence Technology

摘　　要：This study focused on the production of polypropylene(PP)/silver(Ag)composites via additive manufacturing.This study aimed to enhance the quality of medical-grade PP in material extrusion(MEX)three-dimensional printing(3DP)by improving its mechanical properties while simultaneously adding antibacterial properties.The latter can find extremely important and versatile properties that are applicable in defense and security domains.PP/Ag nanocomposites were prepared using a novel method based on a reaction occurring while mixing appropriate quantities of the starting polymers and additives,namely polyvinylpyrrolidone(PVP)as the matrix material and silver nitrate(AgNO_(3))as the filler.This process produced three-dimensional(3D)printed filaments,which were then used to create specimens for a series of standardized tests.It was found that the mechanical properties of the nanocomposites were enhanced in relation to pristine PP,especially for the PP matrix with various loadings of AgNO_(3)and PVP,such as 5.0 wt%and 2.5 wt%,respectively.The voids,inclusions,and actual-to-nominal dimensions also showed improved results.The 3DP specimens exhibited a more effective biocidal performance against Staphylococcus aureus than Escherichia coli,which developed an inhibition zone only in the case of PP with filler loading percentages of AgNO_(3)and PVP at 10.0 wt%and 5.0 wt%,respectively Compounds possessing such properties can be beneficial for various applications requiring increased mechanical properties and biocidal capabilities,such as in the Defence or medical industries.

关 键 词：Polypropylene(PP) Polyvinyl pyrrolidone(PVP) Silver nitride(AgNO_(3)) In-situ reactive melt mixing process Material extrusion(MEX)3D printing Biocidal performance 

分 类 号：TB333[一般工业技术—材料科学与工程] TJ05[兵器科学与技术—兵器发射理论与技术]