Porous membranes from acid decorated block copolymer nano-objects via RAFT alcoholic dispersion polymerization

Abstract

Acid decorated diblock copolymer nano-objects were prepared by polymerization-induced self-assembly via RAFT dispersion polymerization of methyl methacrylate. Spheres were used to prepare thin film membranes.

Biobased Amphiphilic Block Copolymers by RAFT‐Mediated PISA in Green Solvent

“…The particle diameter of the polymerizations performed at 15 and 25 wt% was also determined by DLS (see Table 1). An increase in particle diameter with DP was again observed, and overall no significant impact of the initial monomer concentration (10, 15, or 25 wt%) was observed, as previously reported by Quemener and co‐workers, [ 33 ] revealing the robustness and colloidal stability of the process with regard to variations in monomer concentration at which the polymerization was performed. Cryo‐TEM analyses (see Figure 2d,f for experiment 7 and experiment 10, respectively) showed spherical particles that were quite homogeneous in size, and no aggregates were detected.…”

Nanostructured Membranes from Soft and Hard Nanoparticles Prepared via RAFT‐mediated PISA

“…This extra step is often not favored industrially since it increases the production cost. Recently the use of block copolymer particles in the fabrication of porous membranes has been demonstrated . Membranes prepared from spherical polymer particles can have relatively well‐controlled pore size since the particle diameter dictates the surface area of the gap present in the hexagonally packed spherical particle assembly forming the membrane pores.…”

Influence of Magnetic Nanoparticles on PISA Preparation of Poly(Methacrylic Acid)‐b‐Poly(Methylmethacrylate) Nano‐Objects

“…Polymerization‐induced self‐assembly (PISA) is a remarkable technique for the in situ synthesis of polymer particles with different morphologies using living radical polymerization techniques such as reversible addition fragmentation chain transfer (RAFT) polymerization . Nanoparticles synthesized via PISA have been successfully used for therapeutic applications, catalysis, viscosity modifying agent, responsive materials and pickering emulsifier .…”

“…Previously, we reported the PISA synthesis of PMAA‐ b ‐PMMA nanoparticles of different morphologies (spheres, worms, and vesicles) . These negatively charged nanoparticles were later blended with positively charged magnetic iron‐oxide nanoparticles.…”

“…The resulting iron‐oxide decorated nanoparticles had hydrodynamic diameter of 50 nm in ethanol. The behavior of the porous film under magnetic field was tested using a custom‐made cross‐flow cell. Figure shows the membrane performance under a magnetic field of 0.05 T. The water flux values were measured in cycles in the presence and absence of magnetic field.…”