Influence of temperature upon properties of tailor-made PEBAX® MH 1657 nanocomposite membranes for post-combustion CO2 capture

Abstract

a b s t r a c tTailor-made block copolymer nanocomposite membranes are prepared by incorporation of 40 wt% methoxy poly(ethylene glycol) (PEG) functionalized polyoctahedral oligomeric silsesquioxanes (POSS) nanoparticles in commercial thermoplastic elastomer multiblock copolymer PEBAX s MH 1657. Atomic force microscopy was used to find out the location of the nanoparticles in the block copolymer matrix. Separation of CO 2 from N 2 and H 2 is studied by measurements of single gas transport properties of nanocomposite materials using the time-lag method in the temperature range 30-70 1C. PEG functionalized POSS nanoparticles increase the CO 2 permeability of the nanocomposite membranes without loss of CO 2 /N 2 and CO 2 /H 2 selectivity. Thermal properties of the nanocomposite membranes are studied by differential scanning calorimetry (DSC) to assess the stability of the nanocomposite membranes upon melting of polyether and polyamide blocks.

Influence of block sequence and molecular weight on morphological, rheological and dielectric properties of weakly and strongly segregated styrene-isoprene triblock copolymers

“…They exhibit particular properties which are caused by the combination of different blocks most often leading to self-assembled periodic microphase separated structures. The application of block copolymers in modern material science varies from blends [5][6][7][8][9][10][11][12], nanopatterning [13][14][15][16][17][18] to membranes [19][20][21][22][23][24][25][26][27].…”

“…Commercially well-known block copolymers are AB multiblock copolymers of hard and soft blocks, where the hard blocks are often a polyamide or a polyester, and the soft blocks are a polyether like poly(ethylene glycol) [26,27]. The simplest multiblock copolymers are linear triblock copolymers.…”

Functionalization of POSS nanoparticles and fabrication of block copolymer nanocomposite membranes for CO2 separation

“…Therefore, the nanofillers containing the THF complex and the dimethylsilyl spacer increase the mobility of the polyether segment more than the nanofillers which do not have such moiety. The correlation between gas transport mechanism and structure of the nanofillers are discussed in detail elsewhere [35]. Fig.…”

A stable polymeric chain configuration producing high performance PEBAX-1657 membranes for CO2 separation

“…[14][15][16][17][18][19][20][21][22][23] Poly(ether-block-amide) polymer commonly known as PEBAX is considered as one of the ideal polymeric materials for membrane-based separation of CO 2 from ue gas and natural gas because of its comparatively high gas permeability as well as CO 2 selectivity. 1,16,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] PEBAX consists of two monomers polyethylene oxide (PEO) and polyamide (PA), where the earlier component provides exibility and high CO 2 permeability due to its high affinity with the polar CO 2 molecule, while the latter component imparts mechanical strength to the membrane. As ether oxygen moieties have a signicant affinity to acid gases, PEBAX is considered as one of the best candidates for CO 2 separation from light gases.…”