A compatible crosslinker for enhancement of CO2 capture of poly(amidoamine) dendrimer-containing polymeric membranes

Abstract

a b s t r a c tPoly(amidoamine) (PAMAM) dendrimers are physically immobilized in a crosslinked poly(ethylene glycol) (PEG) upon photopolymerization of PEG dimethacrylates (PEGDMAs) in the presence of the dendrimers in ethanol. The dendrimer-containing polymeric membranes exhibit excellent CO 2 separation properties over smaller H 2 . However, immiscibility of PEG matrix and the dendrimer results in the formation of a bicontinuous phase-separated structure on a couple of microns scale, which inhibits to reduce the membrane thickness for enhancement of the CO 2 permeability. A compatible crosslinker, 4GMAP, is developed from the dendrimer and glycidyl methacrylate. Incorporation of the compatible crosslinker in the photopolymerization suppresses the macrophase separation between PAMAM dendrimer and PEG matrix and allows preparation of polymeric membranes as thin as 10 μm with high CO 2 selectivity. The 4GMAP incorporation also endows pressure tolerance by increasing crosslinking density of the resulting polymeric membranes. The CO 2 permeance is elevated from 9.94 Â 10 À 13 to 1.68 Â 10 À 11 m 3 (STP) m À 2 s À 1 Pa À 1 , by reducing the membrane thickness from 640 to 9.5 μm with 10 of CO 2 selectivity at 313 K and 0.56 MPa of CO 2 partial pressure.

A highly selective PEGBEM-g-POEM comb copolymer membrane for CO2/N2 separation

“…However, many polymer membranes suffer from a trade-off relationship, i.e., membranes with higher permeability are less selective and vice versa [13]. Thus, it is important to develop advanced polymer membranes with higher permeability as well as higher selectivity [14][15][16][17][18].…”

Effect of Carbonic Anhydrase on CO2 Separation Performance of Thin Poly(amidoamine) Dendrimer/Poly(ethylene glycol) Hybrid Membranes

“…Membranes 2019, 9, 167 2 of 7 membrane for pre-combustion. However, it is very difficult to separate CO 2 over H 2 , because the molecular size of CO 2 is greater than that of H 2 , and only limited numbers of CO 2 selective membranes were reported for this purpose [11][12][13].…”

“…It was reported that poly(amidoamine) (PAMAM) dendrimer showed excellent CO 2 /N 2 separation performance in a liquid immobilized membrane (ILM) under 200 kPa low pressure [14]. In our group, PAMAM dendrimer/crosslinked-polymer hybrid membranes, such as PAMAM dendrimer/poly(ethylene glycol) (PEG) hybrid membranes [11][12][13] have been developed by immobilizing PAMAM dendrimer into the cross-linked polymer matrix for use in high pressure CO 2 separation. We found that these membranes show high CO 2 /H 2 separation performance at pressurized conditions, and have the potential to be applied for pre-combustion.…”

“…Membranes 2019, 9, x 2 of 7 saving to apply a CO2 selective membrane for pre-combustion. However, it is very difficult to separate CO2 over H2, because the molecular size of CO2 is greater than that of H2, and only limited numbers of CO2 selective membranes were reported for this purpose [11][12][13]. It was reported that poly(amidoamine) (PAMAM) dendrimer showed excellent CO2/N2 separation performance in a liquid immobilized membrane (ILM) under 200 kPa low pressure [14].…”

Development of Poly(Amidoamine) Dendrimer/ Poly(Ethylene Glycol) Hybrid Membranes for CO2 Capture at Elevated Pressures

“…To enhance CO2 permeance by decreasing membrane thickness, CPC was used to prepare the composite membrane with a thin selectivity layer [10] . The composite membranes, which consisted with PAMAM dendrimer / PEGDMA/CPC hybrid thin layer supported on substrate membrane, were successfully prepared.…”