X. Jiang, S. Liang, F. Wang, W. Geng
Changzhou University, China
pp. 293 - 296
Keywords: Ag/Pebax, composite nanofibers, electrospinning, LiCl•H2O, humidity sensing, antimicrobial properties
Due to its unique physical and chemical properties, poly (ether amide) (Pebax) has been widely applied in membrane separation, chemical sensing, and medical applications. Pebax composite nanofibres offer advantages such as high contact area and fast transport for ions and water molecules. (Pebax) nanofibers containing Ag nanoparticles were prepared by an electrospinning method. The Ag/Pebax nanofibers with ultra-low Ag loadings demonstrated superior antimicrobial properties against Escherichia coli (E. coli; ATCC25922 and avirulent) and Staphylococcus aureus (S. aureus; ATCC6538 and avirulent). For the nanofibres containing only 1 ppm Ag, the inhibition rates reached > 99.9 % and the antimicrobial activity against E. coli and S. aureus was 5.8 and 5.6, respectively. Moreover, LiCl has been uniformly distributed in polyether domains of Pebax, and Pebax 2533 composite nanofibers with different amount of LiCl•H2O were successfully fabricated by electrospinning. The electrospun nanofibres possessed high humidity sensitivity and displayed quick response and recovery. For a LiCl•H2O content at 44.4 wt %, the impedance of the humidity sensor changed nearly four orders of magnitude when the relative humidity changed from 11 % RH to 95 % RH.