Preparation and characterization of durable antibacterial electrospun polypropylene nanofibers
In order to prepare a durable antibacterial polypropylene nanofiber,the purification steps of unsaturated quaternary ammonium salt products are simplified by optimizing the process conditions,and the synthesis efficiency is improved.Its structure is consistent with the results of LC-MS and FTIR.The copolymerization of unsaturated quaternary ammonium with methyl methacrylate enormously reduced the risk of dissolution and surface enrichment,with a dissolution rate below 0.01％.The chemical structure of copolymer is characterized by FTIR and H1-NMR.Finally the antibacterial nanofibers are prepared by electrospinning of antibacterial copolymers and chlorinated polypropylene compound solution.Its average diameter is observed by SEM to be below 300 nm,which is smaller in diameter and larger in surface area compared with melt-blown fiber.And the nanofiber membrane has larger surface area with dissolution rate below 0.001％,which could avoid the similar surface enrichment risk of small molecule quaternary ammonium,guaranteeing its durable antibacterial ability.The antibacterial tests of the nanofiber membrane with three bacteria show that they have a broad spectrum of antibacterial capability,and have great application potential in the field of air filtration,water purification and medical protection.
nanofiberpolypropyleneelectrostatic spinninganti-bacteria propertyquaternary ammonium salt
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