Gas transport properties of poly(1,5-naphthalene-2,2′-bis(3,4-phthalic) hexafluoropropane) diimide (6FDA-1,5-NDA) dense membranes

Permeation through CO2selective glassy polymeric membranes in the presence of hydrogen sulfide

“…The polysulfone dual‐sorption values correspond well with those reported by Aitken et al,25 while the 6FDA‐TMPDA N 2 values are similar to those reported for similar polyimides 26, 27. Shao et al28 has also reported dual‐sorption parameters for CO 2 and N 2 in 6FDA‐TMPDA.…”

Prediction of gas permeability coefficients of copolyimides by group contribution methods

“…Comparison of predicted and experimental permeability coefficients of the copolyimides located near the 1991 upper bound [35] * (Diamine 1)/(Diamine 2) or (Dianhydride 1)/(Dianhydride 2) ratio. 6FDA-Durene/DANT [41][42][43] and c) 6FDA-ODA/DANT [43,44], for H 2 /CH 4 pair for d) 6FDA-mDDS/Durene [41,42,45,46], e) 6FDA-DDBT/Durene [19,41,42,[45][46][47], and for H 2 /N 2 pair for f) 6FDA-DAM/DDBT [19,48]. Highlights • A group contribution method was modified to predict the permeability of over 2200 copolyimide structures.…”

“…The experimental data presented in Figure 12 are reported to be collected at 35°C and 10 atm [41][42][43][44][45][46][47][48], except the data for 6FDA-ODA [44] and 6FDA-DAM [48]. The measurement temperature and pressure for 6FDA-ODA and 6FDA-DAM are noted on Figure 12.…”

Tuning of Nano-Based Materials for Embedding Into Low-Permeability Polyimides for a Featured Gas Separation

“…Besides generating new perm-selective barriers in an MMM, which may ideally demonstrate a synergistic performance (Gin and Noble, 2011), embedding of inorganic materials also tends to enhance the resulting membrane structural properties such as thermal, chemical, and mechanical stability (Luo et al, 2016;Cheng et al, 2018;Ursino et al, 2018). Herein, we present several MMM approaches which have explored improvement of the GS performance of low-permeability PIs (those of less than 25 Barrer for CO 2 permeability), such as diallyl phthalate (DAP) (Alaslai et al, 2016), BTDA-DAPI (Knebel et al, 2016;Castro-Muñoz and Fila, 2019), 3,3 ′ -diamino diphenyl sulfone (DDS) (Liu et al, 2002), 1,5-naphthalene diamine (NDA) (Wang et al, 2002), oxydianiline (ODA) (Xiao et al, 2007;Nik et al, 2012), m-phenylenediamine (m-PDA) (Alaslai et al, 2016;Heck et al, 2017), and 3,3 ′ -hydroxy-4,4 ′ -diamino biphenyl (HAB) (Gleason et al, 2015). To date, several types of micro-and nano-structured materials have been incorporated into low-permeability PIs, including zeolites (e.g., silicalite-1, SAPO-34, zeolite A, ZSM-5, zeolite-13X, and zeolite-KY), porous titanosilicates, mesoporous silica (e.g., , nonporous silica, activated carbon, aluminophosphates (AlPO), carbon-based materials (e.g., nanotubes and carbon molecular sieves), metal-organic frameworks (MOFs) [e.g., UiO-66, zeolitic imidazolate framework (ZIF)-7 and ZIF-8, MOF-5 and MOF-177, MIL-96 and MIL-100, Cu 3 (BTC) 2 , Cu-TPA, Cu-BPY-HFS, and Zn(pyrz) 2 (SiF 6 )], lamellar materials (JDF-L1 and SAMH-3), graphene-based materials (e.g., reduced graphene oxide), and some other materials with crystalline structures (such as MgO, TiO 2 , covalent organic frameworks) (Wei et al, 2013;Fang et al, 2014;Seoane et al, 2015;Martin-Gil et al, 2017;Zhang et al, 2017;Castro-Muñoz et al, 2018a, 2019b.…”