01993nas a2200217   4500008004100000022001400041245009700055210006900152260000800221300001100229490000800240520125400248653001001502653002001512653002601532653002601558100002201584700002101606700002201627856012601649       2024                        eng d  a1944-399400aABPBI-based hollow fiber membranes for forward osmosis (FO) possessing low reverse salt flux0 aABPBIbased hollow fiber membranes for forward osmosis FO possess  cOCT  a1006410 v3203 a<p>
	The poly(2,5-Benzimidazole), known for its excellent thermochemical stability, was evaluated as a membrane material for forward osmosis. The dope in methane sulfonic acid was used to make hollow fiber membranes. The availability of bound MSA in HFMs was compared with its neutral form. Aqueous solutions of two common salts reported for FO (NaCl and MgCl2) were used as a draw solution at varying concentrations. The performance was determined in terms of water flux and reverse salt flux. The long-term performance of the membrane was assessed. The heat pretreatment of membranes was beneficial in offering low reverse salt flux, a crucial parameter in FO. The heat treatment at 350 degrees C exhibited excellent performance of low-RSF, irrespective of the draw solute used. The presence of MSA in the membrane matrix was found to be beneficial. Present HFMs exhibited reverse salt flux as low as 0.003 mol m-2 h-1 using 2 mol L-1 MgCl2 as a draw solution. The water flux of present membranes was lower than that of reported FO-membranes, which is attributable to the larger thickness of the present membranes. The findings will be used to make ABPBI-based membranes in thin form to elevate the fluxes and their practical applicability.</p>
10aABPBI10aForward osmosis10aHollow fiber membrane10aLow reverse salt flux1 aThorat, Nitin, M.1 aLele, Ashish, K.1 aKharul, Ulhas, K.  uhttps://library.ncl.res.in/content/abpbi-based-hollow-fiber-membranes-forward-osmosis-fo-possessing-low-reverse-salt-flux02369nas a2200241   4500008004100000022001400041245010200055210006900157260000800226300001100234490000800245520156400253653001001817653003301827653002801860653000901888653003001897100001801927700001801945700001701963700001801980856012901998       2024                        eng d  a0376-738800aThin, flat sheet, solvent-stable ABPBI-based membranes for organic solvent forward osmosis (OSFO)0 aThin flat sheet solventstable ABPBIbased membranes for organic s  cAUG  a1230900 v7083 a<p>
	The work demonstrates poly(2,5-benzimidazole), commonly known as ABPBI, based thin, solvent-stable, scalable flat sheet membranes for organic solvent forward osmosis (OSFO). The membranes treated at 60 and 350 degrees C were analyzed for OSFO using solvents of industrial significance (methanol, ethanol, acetonitrile, N,N-dime- thylformamide, and dimethyl sulphoxide). Although LiCl could be employed as a draw solute with methanol as a solvent, its insolubility in other organic solvents led to the use of a new, simple-to-synthesize acid-base salt, viz., triethylammonium benzoate (TB). A study on the effects of membrane treatment temperature on solvent flux, reverse salt flux (RSF), ability to use TB as draw solute with other solvents, long-duration analysis, and use of model organic compounds in the feed side led to an understanding of the applicability of present thin, scalable ABPBI membranes for OSFO. Although membranes treated at 350 degrees C possessed a lower methanol flux than those treated at 60 degrees C, the lowering in its RSF was highly attractive. TB, having a larger molecular size than LiCl, led to a slight reduction in methanol flux and a considerable reduction in RSF. With TB, extremely low RSF was observed with the chosen solvents. The long-duration study using MeOH and acetonitrile was investigated. A complete rejection of all model organic compounds of varying molecular weights and chemical functionality indicated the merits of the present thin, scalable ABPBI membranes for practical applications of OSFO.</p>
10aABPBI10aFree -standing thin membrane10aModel organic compounds10aOSFO10aTriethylammonium benzoate1 aNitin, Thorat1 aSuresh, Valvi1 aAshish, Lele1 aUlhas, Kharul  uhttps://library.ncl.res.in/content/thin-flat-sheet-solvent-stable-abpbi-based-membranes-organic-solvent-forward-osmosis-osfo