02287nas a2200241   4500008004100000022001400041245007600055210006900131260000800200300001100208490000800219520153700227653002101764653002001785653001801805653002701823653001801850653001101868100001701879700002001896700002201916856010701938       2024                        eng d  a0376-738800aChemodialysis of organic acids using ABPBI-based hollow fiber membranes0 aChemodialysis of organic acids using ABPBIbased hollow fiber mem  cJAN  a1221530 v6893 a<p>
	Organic acids are a class of essential commodity chemicals used in various industries. Their production methods are shifting from conventional chemicals to fermentation, driven by green process strategies, environmental regulations, cost feasibility, etc. Separating formed acid from the fermentation broth is a primary technological barrier. Conventional methods are complex and impose environmental issues. A promising approach, `Chemodialysis,' capable of transforming the techno-economical feasibility of acid recovery scenario by reducing the number of steps, needs further investigation. This work evaluates scalable hollow fiber membranes based on poly(2,5-benzimidazole) (ABPBI) for chemically assisted dialysis, viz., Chemodialysis. Sorption analyses of commercially significant organic acids (acetic, lactic, and glycolic acid) and nonacidic solutes (NaCl and glucose) were performed using conventional flat sheet samples to assess their role in governing permeation characteristics. The transport properties of acids in the presence of NaCl and glucose as co-solutes were analyzed using hollow fiber membranes. The high selectivity of acid over nonacidic solutes ranges from 400-22,400, coupled with high acid permeability, enhances the applicability of Chemodialysis for the separation of acids using hollow fiber membranes. The fluxes of acids (acetic, glycolic, and lactic) through dense, similar to 100 mu m thick, scalable hollow fiber membranes ranging from 10.9 to 13.12 g/m(2)h are highly appreciable.</p>
10a5-benzimidazole)10aAcid separation10aChemodialysis10aHollow fiber membranes10aOrganic acids10aPoly(21 aGawas, Saroj1 aAlladi, Lavanya1 aKharul, Ulhas, K.  uhttp://library.ncl.res.in/content/chemodialysis-organic-acids-using-abpbi-based-hollow-fiber-membranes02425nas a2200241   4500008004100000022001400041245017000055210006900225260000800294300001600302490000700318520150000325653003101825653001701856653003101873653003501904653002701939100002601966700002201992700001702014700002202031856013002053       2024                        eng d  a1944-824400aScalable, interfacially synthesized, covalent-organic framework (COF)-based thin-film composite (TFC) hollow fiber membranes for organic solvent nanofiltration (OSN)0 aScalable interfacially synthesized covalentorganic framework COF  cAPR  a19463-194710 v163 a<p>
	Covalent organic frameworks have great potential for energy-efficient molecular sieving-based separation. However, it remains challenging to implement COFs as an alternative membrane material due to the lack of a scalable and cost-effective fabrication mechanism. This work depicts a new method for fabricating a scalable in situ COF hollow fiber (HF) membrane by an interfacial polymerization (IP) approach at room temperature. The 2D COF film was constructed on a polyacrylonitrile HF substrate using aldehyde (1,3,5-trimethylphloroglucinol, Tp) and amine (4,4 `-azodianiline (Azo) and 4,4 `,4 `'-(1,3,5-triazine- 2,4,6-triyl) trianiline (Tta)) as precursors. The COF membrane on the PAN substrate showed 99% rejection of Direct red-80 with remarkable solvent permeance. The rejection analysis revealed that the structural aspects of the solute molecule play a major role in rejection rather than the molecular weight. We further optimized the precursor concentrations to improve the permeation performance of the resulting membrane. The durability study reveals excellent stability of the membrane toward organic solvents. This study also demonstrated the easy scalability of the membrane fabrication approach. The approach was further extrapolated to fabricate a cation-based COF membrane. These charged membranes exhibited an enhanced rejection performance. Finally, this approach can facilitate industrially challenging molecular sieving applications using COF-based membranes.</p>
10acovalent-organic framework10ahollow fiber10ainterfacial polymerization10aorganic solvent nanofiltration10aselective COF membrane1 aKunjattu, Shebeeb, H.1 aThorat, Nitin, M.1 aGawas, Saroj1 aKharul, Ulhas, K.  uhttp://library.ncl.res.in/content/scalable-interfacially-synthesized-covalent-organic-framework-cof-based-thin-film-composite