Development of novel segmented-pie microfibers from copper-carbon nanoparticles and polyamide composite for antimicrobial textiles application
TEXTILE RESEARCH JOURNAL(2022)
摘要
Development of novel antibacterial fibers with mass production is urgently required in the technical textiles industry. In this paper, a series of segmented-pie composite microfibers based on polyamide 6 (PA6) and different amounts of copper-carbon nanoparticles (CuCNPs) were fabricated by utilizing a melt-spinning apparatus with twin-screw extruders. The encapsulation of CuCNPs and the formation of segmented-pie structure of as-prepared PA6/CuCNP microfibers were confirmed. The CuCNPs or their agglomeration with an average diameter of approximately 200 nm exhibited a uniform distribution in PA6/CuCNP segmented-pie microfibers. Compared with the pure PA6 microfibers, the PA6/CuCNP segmented-pie microfibers showed obviously enhanced crystallinity, thermal stability as well as UV resistance. As the CuCNP content increased to 1.0 wt%, the tensile strength and initial modulus increased to 3.79 cN/dtex and 22.4 cN/dtex, respectively. Importantly, the PA6/CuCNP segmented-pie microfibers presented excellent antimicrobial activities to both Escherichia coli and Staphylococcus aureus (antimicrobial efficiency around 99%) and great antifungal activity to Candida albicans (antimicrobial efficiency around 82%). Taken together, our present study demonstrated that the PA6/CuCNP segmented-pie microfibers show great prospects in the fabrication of technical textiles for healthcare applications.
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关键词
PA6 microfibers, segmented-pie structure, copper nanoparticles, melt-spinning, antimicrobial textiles
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