this solvent mix will dissolve PS, if its good enough for spinning depends on the Mw of PS. See link below, its an electrospinning "archive" with lots of useful info electrospinning. Probably you can also find less toxic solvents for PS there.

http://electrospintech.com/espinmemcheatsheet.html#.YkWBQzWxVPY

I read a lot of your answers and they are really helpful, thank you, Mr. Marc Simonet

Please check this link :https://www.researchgate.net/publication/360244584_Enhancing_the_physical_properties_of_polystyrene_nanofibers_by_adding_multiwall_carbon_nanotubes_and_natural_dye