Electrospinning of PAN/Ag NPs nanofiber membrane with antibacterial properties
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College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China Key Lab Ecol Rare & Endangered Species & Environmental, Guangxi Normal University, Guilin 541004, China a) Address all correspondence to this author. e-mail: [email protected] 2
Received: 29 June 2018; accepted: 25 January 2019
Durable antibacterial PAN/Ag NPs nanofiber membrane was prepared by electrospinning. In this study, Ag NPs were composed by applying polyvinyl pyrrolidone as a dispersant and sodium borohydride (NaBH4) as a reductant. The composite nanofiber films and silver nanoparticles were characterized and tested by transmission electron microscopy, scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, and Brunauer Emmett Teller (BET) and thermogravimetric analysis test. The specific surface area of PAN/Ag NPs (1%) and PAN/Ag NPs (3%) nanofiber membrane were about 25.00 m2/g calculated by the BET equation. It can be seen that the pore sizes of PAN, PAN/Ag NPs (1%), and PAN/Ag NPs (3%) nanofiber membranes were mainly distributed between 30 and 40 nm. The maximum removal rate of PM10, PM2.5, and PM1.0 was about 94%, 89%, and 82%, respectively, indicating it has a good filtering effect. The results also demonstrated that this membrane has bacterial reduction of over 99.9% for E. coli and S. aureus, respectively. In addition, the thermal stability of the fiber membrane with Ag NPs has no clear difference when compared to pure PAN nanofiber membrane and also has better moisture conductivity, indicating it is a potential candidate applied in biopharmaceutical antiseptic protection products.
Introduction In recent years, electrospinning nanofiber composites have been a hot topic of research. Because of their simple fabrication with low cost, high yield and the unique structure were obtained [1, 2]. They can be imparted with many new functional properties compared to the traditional materials. For example, Khodkar [3] used coaxial electrospinning to prepare antibacterial, biocompatible core, and nds shell fibers. Yang [4] used chitosan composite fiber membrane to study antibacterial and thermal stability. Schiffman [5] studied antibacterial properties of single-walled carbon nanotube electrospinning polymer. Hence, it has drawn great attraction to the academic and industrial community till date. What’s more is that electrospinning nanofiber composite has been employed in electronic materials [6], filter materials [7], and biomedical and diaphragm materials [8, 9]. Because of nanofiber membranes’ small size effect, metal nanoparticles exhibit special excellent properties in light,
ª Materials Research Society 2019
electricity, magnetism, and heat [10]. Also, metal nanoparticles with excellent surface effect and quantum size effect [11, 12] can endow electrical conductivity and antibacterial and antistatic property of the fiber [13]. Among them, Ag NPs can produce good and lasting antibacterial effect when introduced in pol
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