Medical grade polyamide 12 silver nanoparticle filaments fabricated with in-situ reactive reduction melt-extrusion: rheological, thermomechanical, and bactericidal performance in MEX 3D printing

IF 3.674 4区工程技术 Q1 Engineering

Applied Nanoscience Pub Date : 2023-09-21 DOI:10.1007/s13204-023-02966-4

Nectarios Vidakis, Markos Petousis, Nikolaos Michailidis, Nikolaos Mountakis, Vassilis Papadakis, Apostolos Argyros, Chrysa Charou

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引用次数: 1

Abstract

Abstract The development of bioactive, multi-functional, and cost-effective nanocomposite filaments for additive manufacturing (AM) is pivotal for the evolution of biomedical and healthcare sectors. Herein, an industrially scalable process is reported, to produce medical grade PA12/AgNP nanocomposites, through in-situ reactive melt-mixing, occurring within the filament extruder. Bactericidal elemental nanoparticles (Ag 0 ) were formed by silver ions (Ag + ) reducing from the Silver Nitrate (Ag 2 NO 3 ) precursor, which was suitably added to the polymer melt. Polyvinyl Alcohol (PVA) was deployed in the compound melt, as a reducing macromolecular agent. The produced nanocomposite filaments were utilized to fabricate samples with Material Extrusion (MEX) AM. A total of sixteen (16) different tests were conducted on filaments and 3D-printed samples to assess their mechanical, rheological, thermal, and antibacterial characteristics, in accordance with international standards. The nanocomposites exhibited a significant mechanical reinforcement of up to 50% compared to PA12. Additionally, the Ag-based nanocomposites demonstrated remarkable antimicrobial behavior in the presence of Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ) microbes.

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医用级聚酰胺12银纳米颗粒长丝用原位反应还原熔融挤出:流变学，热机械和杀菌性能在MEX 3D打印

用于增材制造(AM)的具有生物活性、多功能和成本效益的纳米复合材料长丝的开发对生物医学和医疗保健行业的发展至关重要。本文报道了一种工业上可扩展的工艺，通过在长丝挤出机内进行原位反应熔融混合来生产医用级PA12/AgNP纳米复合材料。将硝酸银(ag2no3)前驱体还原成银离子(Ag +)，并适当地加入到聚合物熔体中，形成杀菌元素纳米颗粒(Ag 0)。聚乙烯醇(PVA)作为高分子还原剂掺入复合熔体中。利用材料挤压增材制造技术制备了纳米复合材料长丝。根据国际标准，对长丝和3d打印样品进行了总共16项不同的测试，以评估其机械、流变、热学和抗菌特性。与PA12相比，纳米复合材料的机械增强率高达50%。此外，银基纳米复合材料在金黄色葡萄球菌(S. aureus)和大肠杆菌(E. coli)存在时表现出显著的抗菌行为。

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来源期刊

Applied Nanoscience Materials Science-Materials Science (miscellaneous)

CiteScore

7.10

自引率

0.00%

发文量

430

期刊介绍： Applied Nanoscience is a hybrid journal that publishes original articles about state of the art nanoscience and the application of emerging nanotechnologies to areas fundamental to building technologically advanced and sustainable civilization, including areas as diverse as water science, advanced materials, energy, electronics, environmental science and medicine. The journal accepts original and review articles as well as book reviews for publication. All the manuscripts are single-blind peer-reviewed for scientific quality and acceptance.

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