Stimuli responsive nanostructured porous network from triblock copolymer self-assemblies

Abstract

Well controlled ABA triblock copolymer with pendent boronic acid groups is prepared using RAFT chemistry. The resulting flower like micelles in mixture of H2O/NMP forms stimuli responsive porous network.

RAFT/MADIX emulsion copolymerization of vinyl acetate and N-vinylcaprolactam: towards waterborne physically crosslinked thermoresponsive particles

“…1 Stimuli-responsive polymers are a class of advanced polymers exhibiting properties tuned by an external stimulus such as temperature, light, pH, organic or gaseous molecules. [2][3][4][5] These polymers have received considerable attention within the last decade, due to their wide range of applications for smart materials like responsive optical devices 6,7 , membrane technology, 8,9 or for biomaterials like drug delivery systems, biosensors or cell culture substrates. [10][11][12][13][14] It is thus relevant to produce stimuli-responsive polymers of controlled macromolecular features as waterborne latex by emulsion polymerization process.…”

pH-responsive nano-structured membranes prepared from oppositely charged block copolymer nanoparticles and iron oxide nanoparticles

“…Theoretical pore size was estimated using a straightforward model based on the hexagonal arrangement of mono-disperse spheres [35]. Here, the average diameter of the PMAA64-PMMA400 and PDMAEMA80-PMMA500 spherical nanoparticles are 18.9 nm and 25.5 nm, respectively as measured from TEM images.…”

“…Formation of porous and defect free membranes was also confirmed by imaging analysis. In our previous studies [14,[35][36][37], we also reported the preparation of nanocomposite membranes with particular pore sizes, by using already produced colloidally stable solutions. By movement using this method, membrane of desired pore size could be easily synthesized by first preparing the nanoparticles of a particular diameter which will assemble to give a porous membrane with the desired properties.…”

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.…”