Instead of acetone, the guys at protoparadigm are using tetrahydrofuran, or THF, as a solvent for PLA. Other PLA solvents aren’t friendly to living organisms or are somewhat hard to obtain.

The pore size of butyl rubber electrospun membranes is affected by controlling the solvent evaporation rate of the solution being spun. Tetrahydrofuran is a typical solvent used for the ...