Manufacturing of Surface Nanostructured Fibers Featuring an Antibacterial Effect by Magnetic Field Transportation of Magnetite@Silver Core-Shell Nanoparticles — Oak Academic Publishing
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Manufacturing of Surface Nanostructured Fibers Featuring an Antibacterial Effect by Magnetic Field Transportation of Magnetite@Silver Core-Shell Nanoparticles
Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
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Inorganic Chemistry, Institute of Chemistry, TechnischeUniversität Chemnitz, Chemnitz, Germany
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Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
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Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
,
Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
,
Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
,
Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
,
Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
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Inorganic Chemistry, Institute of Chemistry, TechnischeUniversität Chemnitz, Chemnitz, Germany
1 Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
2 Inorganic Chemistry, Institute of Chemistry, TechnischeUniversität Chemnitz, Chemnitz, Germany
3 Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
4 Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
5 Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
6 Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
7 Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
8 Surface Engineering, Innovent e. V. Technology Development, Jena, Germany
9 Inorganic Chemistry, Institute of Chemistry, TechnischeUniversität Chemnitz, Chemnitz, Germany
Magnetic core-shell nanoparticles of type Fe 3 O 4 @Ag were synthesized in gram scale following a combined co-precipitation phase-transfer method and afterwards, processed to nanoparticle polymer (polypropylene and polyamide) composites. These composites were used as sheath material for the fabrication of core-sheath fibers. During the melt spinning process, a magnetic field was applied around the roving, whereby the particles move in the still liquid sheath polymer towards the surface. The produced fiber materials were investigated by AFM showing a nanostructuring of the surface, which was indirectly confirmed by determination of a slight surface tension lowering. Nanoparticle movement was shown by cross-section SEM and EDX measurements. The antibacterial activity of the spun fibers was proven by contacting them with Escherichia coli. A long-term stability of this effect was observable by carrying out a standard washability test. In contrast to previous works this new approach uses no deposition technique to introduce surface changes. It rather applies a magnetic force to move appropriately equipped nanoparticles from the inside of the fiber to the surface. This leads in only one step to a strong superficial anchoring of the particles resulting in a unique combination of long-term stable antibacterial and improved anti-soiling effects.
KeywordsNanocompositesPolymer FibersCore-Shell NanoparticlesMagnetic Field TreatmentNanostructured Surface
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