Behler K, Havel M, Gogotsi Y. New solvent for polyamides and its application to the electrospinning of polyamides 11 and 12 [J]. Polymer, 2007, 48(22): 6617-6621.
- Polyamides with long hydrocarbon chains, e.g. PA11 and PA12, are generally dissolved in phenolic or fluoric solvents that prevent these
polymers from being electrospun and used in many applications because of their high boiling point and/or prohibitive cost.
- We demonstrate that a mixture of formic acid and dichloromethane can lead to the dissolution of various polyamides enabling their subsequent electrospinning. Nanofibers and nanoribbons of 130 nm and greater in average diameter were obtained and characterized using scanning electron microscopy and Raman spectroscopy.
- combine hydrophilic and hydrophobic solvents.
- including 1/1did not dissolve the PA 6pellets.
2 wt.%to 5 wt.% using the 1/1 volume ratio of solvents.
- It has been shown that the combination of FA and DCM is a new solvent for polyamides. PA11 and PA12, which are the most difficult polyamides to dissolve, were electrospun to form nanofibers and nanoribbons.
- Raman spectroscopy showed a higher crystallinity of the electrospun PA11 and PA12 nanofibers as compared to the original pellets.
- The electrospun fiber diameters can be tailored from w 130 nm (2 wt.%) to over 800 nm (5 wt.%).