Polymer fibers and particles produced by electrospinning or electrospraying

A method of producing polymer fibers or particles by electrospinning and in situ polymerization of monomers using an electrospinning setup equipped with a microfluidic mixing system comprising:

• a high voltage power supply;
• an electrically grounded collector;
• an electrospinning tip serving as a positive electrode;
• a monomer solution comprising a monomer and a separate catalyst solution comprising a catalyst, wherein said monomer solution and said catalyst solution are contained in separate syringe pumps;
• and
• a microfluidic mixing chamber, where the monomer solution and the catalyst solution are mixed to create one combined solution;
• wherein said in situ polymerization of monomers comprises the following:
• mixing the monomer solution and the catalyst solution in a microfluidic mixing chamber to create one combined solution;
• sending the combined solution into the electrospinning tip;
• applying voltage to the electrospinning tip via said high voltage power supply;
• ejecting a charged jet from the electrospinning tip toward the collector;
• polymerizing said combined solution via in situ polymerization en route to the collector;
• and
• depositing polymer fibers or particles onto the collector.