Improved Antimicrobial Efficacy of m-Aramid

Abstract

-Poly(m-phenyleneisophthalamide), m-aramid has no adjacent α-hydrogen of a nitrogen-halogen bond causes dehydrohalogenation. This fact proposes that m-aramid is one of good antimicrobial precursors. To enhance the surface area of m-aramid, electrospinning was employed. Scanning electron microscopy(SEM) was conducted to inspect the morphology change of m-aramid. The surface area of regular and electrospun m-aramid was calculated. Swatch test was applied to measure antimicrobial activity of the samples. The results showed that within 10 min contact time the electrospun m-aramid inactivated Escherichia coli KCTC 1039 (Gram-negative bacteria) with 8 log reductions.

Strong, Long, Electrically Conductive and Insulated Coaxial Nanocables

“…For the solution used in electrospinning, PMIA was dissolved in N , N -dimethylacetamide (DMAc) in the presence of a chloride salt that increases its solubility and the solution’s electrical conductivity. ,,− The electrospinning process was initially developed on a rotating drum collector with aluminum foil wrapping. It was found that using LiCl often leads to a self-bundling phenomenon − which makes it challenging to produce single fibers (Video S1).…”

“…It was found that using LiCl often leads to a self-bundling phenomenon − which makes it challenging to produce single fibers (Video S1). Using CaCl 2 instead of LiCl, keeping the electrospinning chamber at low humidity (below 20% RH), and using a sufficiently high polymer concentration in the solution all contribute to the elimination of self-bundling. Furthermore, at low polymer concentration, we also frequently observe branched fibers due to jet splitting. − …”

“…PMIA electrospinning has previously been demonstrated, ,,− and various coatings have even been applied onto nonwoven networks of PMIA nanofibers . Electrospinning and physical vapor deposition (PVD) methods have also been previously combined to make transparent electrodes: Wu and co-workers used electrospun fibers as temporary templates, which they coated using PVD and then dissolved away the polymer fibers to make a network of trough-shaped structures .…”