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One-step synthesis of silver nanoparticle-filled nylon 6 nanofibers and their antibacterial properties

Shi, Quan, Vitchuli, Narendiran, Nowak, Joshua, Noar, Jesse, Caldwell, Jane M., Breidt, Frederick, Bourham, Mohamed, McCord, Marian, Zhang, Xiangwu
Journal of materials chemistry 2011 v.21 no.28 pp. 10330
nanoparticles, nylon, nanofibers, polymers, antibacterial properties, silver nitrate, reducing agents, formic acid, Gram-positive bacteria, Gram-negative bacteria, dispersibility, thermal properties
A novel and facile one-step approach to in situ synthesize silver nanoparticle-filled nylon 6 nanofibers by electrospinning is reported. The method does not need post-treatments and can be carried out at ambient conditions without using additional chemicals. It employs the electrospinning solvent as a reducing agent for in situ conversion of AgNO3 into silver nanoparticles during the solution preparation. The resultant silver nanoparticle-filled nylon 6 hybrid nanofibers show an excellent fibrous structure (fiber diameter at 50–150 nm), with narrow size 2–4 nm silver nanoparticles uniformly dispersed throughout the nylon 6 matrix. DSC analysis shows that the in situ incorporation of silver nanoparticles increased the Tg and crystallinity of the resultant nanofibers. These silver nanoparticle-filled nylon 6 nanofibers exhibit a steady and long-lasting silver ion release behavior, and robust antibacterial activity against both Gram-positive B. cereus and Gram-negative E. coli microorganisms.