Abstract
In recent years, the development of porous materials with excellent reactivity and absorption properties has attracted significant attention. We fabricated poly(lactic acid) (PLA) microfibers with uniform nanopores via a one-step rotary centrifugal spinning method using a PLA/chloroform solution. To evaluate the solvent stability of the nanoporous microfibers, vapor annealing was performed with three different organic solvents, and the structural changes and oil adsorption abilities of the nanoporous PLA fibers before and after solvent vapor annealing were systematically evaluated. The results showed that acetone or ethanol vapor annealing induced internal structural changes in the nanoporous PLA microfibers, but did not affect the nanoporous structure. Furthermore, we demonstrated that the nanoporous PLA fibers fabricated in this study had a high oil absorption capacity of up to 26.78 g/g, and that the acetone or ethanol vapor annealed fibers could maintain almost the same absorption capacity. Therefore, the nanoporous PLA fibers prepared using the proposed one-step centrifugal spinning method have a high potential as environmentally friendly biodegradable filters or high-absorption materials.
Published Version
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