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Cellulose Membranes for Organic Solvent Nanofiltration
Date
2016-07-21
Author
Sukma, Faqih Muhamad
Çulfaz Emecen, Pınar Zeynep
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https://hdl.handle.net/11511/77324
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Cellulose membranes for organic solvent nanofiltration
Sukma, Faqih Muhamad; Çulfaz Emecen, Pınar Zeynep; Department of Chemical Engineering (2016)
Cellulose is an alternative polymer that can be used in Organic Solvent Nanofiltration (OSN) where lack of chemically-stable membranes is a major problem. Cellulose, due to strong inter and intramolecular hydrogen bonding, is difficult to dissolve in many solvents, which is an advantage for OSN applications. Common solvent systems like Sodium Hydroxide/Carbon Disulfide (NaOH/CS2) or N-Methylmorpholine-N-oxide (NMMO) for cellulose solubilization are either toxic or unstable. Recent studies have shown that th...
Cellulose membranes for organic solvent nanofiltration
Sukma, F. M.; Çulfaz Emecen, Pınar Zeynep (2018-01-01)
Cellulose membranes were fabricated by phase inversion from solutions of cellulose in 1-ethyl-3-methylimidazolium acetate ([EMIM] OAc) as solvent and acetone as volatile cosolvent. The rejection of Bromothymol Blue ( 624 Da) in ethanol increased and the permeance decreased by increasing the cellulose concentration in the solution prior to coagulation, either by having more cellulose in the starting solution or by evaporating the volatile cosolvent. Drying the membranes after coagulation further increased th...
Cellulose membranes for Organc Solvent Nanofiltration
Sukma, Faqıh; Konca, Kübra; Çulfaz Emecen, Pınar Zeynep (2018-06-13)
Cellulose-based membranes via phase inversion using [EMIM]OAc-DMSO mixtures as solvent
Durmaz, Elif Nur; Çulfaz Emecen, Pınar Zeynep (2018-03-16)
Cellulose and cellulose acetate membranes were fabricated by phase inversion from their solutions in 1-ethyl-3-methylimidazolium acetate ([EMIM] OAc), or its mixture with dimethyl sulfoxide (DMSO). Inclusion of DMSO in the solution decreased crystallinity and rejection for both polymers. When cellulose solutions were coagulated in ethanol crystallinity and rejections were lower, and cellulose acetate membranes coagulated in ethanol had a loose, macroporous morphology, which was attributed to the poor nonsol...
Cellulose ultrafiltration membranes for cleaning solvent wastes of photolithography process
Savaş, Aygen; Çulfaz Emecen, Pınar Zeynep (2020-12-07)
Photolithography, the process used to transfer shapes and patterns on semiconductors, uses a number of solvents such as acetone, n-methyl pyrrolidone and propylene glycol monomethyl ether acetate (PGMEA), to clean surfaces and remove photoresists used throughout the patterning process. Cleaning these solvents for recycle in the photolithography process or for other purposes can have significant impact on the environmental burden of electronics manufacturing. Cellulose is a natur...
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F. M. Sukma and P. Z. Çulfaz Emecen, “Cellulose Membranes for Organic Solvent Nanofiltration,” 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/77324.
