01748nas a2200181   4500008004100000022001400041245010300055210006900158260011000227300001400337490000600351520099900357100002001356700002301376700002001399700002201419856012501441       2013                        eng d  a2050-748800aIn situ growth of metal-organic frameworks on a porous ultrafiltration membrane for gas separation0 aIn situ growth of metalorganic frameworks on a porous ultrafiltr  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a8828-88350 v13 a<p>We demonstrate the synthesis of CuBTC and ZIF-8 on a polysulfone based porous asymmetric ultrafiltration (UF) membrane by in situ growth followed by the LBL deposition of crystals without any need for preseeding or surface modification of the membrane. In this way, the top surface of the UF membrane pores is completely covered by MOFs; while the remaining part of the membrane offers a flexible support to the MOFs. The pore apertures of the MOF nanoparticles located at the pore opening of the UF membrane act as channels for the entry of penetrants. The remaining porous sublayer of the membrane carries penetrants on the permeate side without significant resistance. These composite membranes were characterized by PXRD and SEM. The gas permeation study was performed using pure gases of industrial significance (H-2, C3H6 and CO2). The performance of CuBTC@PSF showed enhanced selectivity, of 7.2 and 5.7 for H-2/CO2 and H-2/C3H6 respectively, to that of the pristine PSF membrane.</p>1 aNagaraju, Divya1 aBhagat, Deepti, G.1 aBanerjee, Rahul1 aKharul, Ulhas, K.  uhttps://library.ncl.res.in/content/situ-growth-metal-organic-frameworks-porous-ultrafiltration-membrane-gas-separation-002354nas a2200253   4500008004100000022001400041245012100055210006900176260007300245300001000318490000800328520141600336653003401752653002201786653001401808653002201822653002001844100002301864700001801887700002201905700001901927700002201946856013201968       2014                        eng d  a0011-916400aPBI-BuI and PAN-PSSALi based UF membranes: effects of solute and membrane surface interactions on rejection and flux0 aPBIBuI and PANPSSALi based UF membranes effects of solute and me  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN  a45-510 v3333 a<p>Ultrafiltration membrane using tert-butylpolybenzimidazole (PBI-BuI) was prepared and characterized for flux and rejection performance using Gel Permeation Chromatography (GPC). Polyethylene glycol (PEG) and polyethylene oxide (PEO) with different molecular weights were used as the solutes. While using feed solution containing mixture of PEGs, higher rejection was observed than using individual PEG. The water flux of PBI-BuI membrane after passing individual PEG solutions showed considerable (similar to 36%) reduction, which could be attributable to the PEG adsorption on the membrane pore surface. PEG adsorption was further substantiated by SEM, IR and TGA. The amphoteric nature of PBI-BuI could cause H-bonding between membrane surface and PEG molecules, leading to PEG adsorption on the membrane and pore surface. To ascertain this postulation, a study with PAN-PSSALi (which does not contain H-bonding) based UF membrane containing negatively charged -SO3- group was done. It was found that PEG adsorption in this case is not as predominant as in earlier case. This membrane showed marginal reduction in water flux of 8%, vis-a-vis 36% reduction shown by PBI-BuI based membrane. This indicated that H-bonding present in PBI-BuI is mainly responsible for the PEG adsorption on its membrane and pore surface, in spite of PEG being a neutral molecule. (C) 2013 Elsevier B.V. All rights reserved.</p>10aGel permeation chromatography10aPolybenzimidazole10aRejection10aSolute adsorption10aUltrafiltration1 aBhagat, Deepti, G.1 aMule, Bhavana1 aMandlekar, Neeraj1 aPandare, Kiran1 aKharul, Ulhas, K.  uhttps://library.ncl.res.in/content/pbi-bui-and-pan-pssali-based-uf-membranes-effects-solute-and-membrane-surface-interactions-0