Polyarylonitrile system for preparing multifunctional carbon flowers and other superstructures
View Patent ↗A method of fabricating polyacrylonitrile (PACN) nanostructured carbon superstructure shapes is provided that includes forming a PACN polymer superstructure shape by using as a monomer, an initiator, and a solvent or incorporation of a different co-monomer for free radical polymerization, and converting the PACN polymer superstructure shape to a nanostructured carbon superstructure analogue using stabilization and carbonization of the PACN polymer superstructure shape, where the stabilization includes heating the PACN polymer superstructure shape to a temperature that is adequate to form a stabilization reaction, where the carbonization includes using a heat treatment.
1. A method of fabricating a polyacrylonitrile (PACN) and deriving a nanostructured superstructure shape, comprising:
a) synthesizing in a one-pot free radical polymerization synthesis a PACN structure using acrylonitrile (ACN) as a monomer, azobisisobutyronitrile (AIBN) as an initiator and an organic solvent; and
b) converting the PACN structure into a nanostructured superstructure shape by stabilizing and carbonizing the PACN structure, wherein the stabilizing step comprises an oxidative reaction step in air at a temperature in a range of 180° C. to 300° C. with a ramping rate of 0.1° C./min to 5° C./min in a range of 2 to 12 hours and the carbonizing step comprises pyrolyzing the stabilized PACN structure at a temperature ranging from 600° C. to 1500° C. in an inert gas atmosphere or vacuum condition.
2. The method according to claim 1 , wherein the organic solvent is selected from the group consisting of acetone, methanol, ethanol, acetic acid, acetonitrile, pyridine, THF, toluene, isopropanol, and hexane.
3. The method according to claim 1 , wherein the step of synthesizing further comprising incorporating a co-monomer selected from the group consisting of acrylic acid (AA), styrene (S), methyl methacrylate (MMA), and other free radical polymerization monomers.
4. The method according to claim 1 , wherein the nanostructured superstructure shape is selected from the group consisting of a flower-shape, a pompom-shape, a tree leaf-shape, and a petal-shape.