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Type
ArticleKAUST Department
Advanced Membranes and Porous Materials Research CenterAdvanced Nanofabrication, Imaging and Characterization Core Lab
Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC)
Biological and Environmental Sciences and Engineering (BESE) Division
Chemical Engineering Program
Electron Microscopy
Environmental Science and Engineering Program
Nanostructured Polymeric Membrane Lab
Physical Science and Engineering (PSE) Division
Water Desalination and Reuse Research Center (WDRC)
Date
2015-05-09Online Publication Date
2015-05-09Print Publication Date
2015-09Permanent link to this record
http://hdl.handle.net/10754/553013
Metadata
Show full item recordAbstract
Membrane processes are considered energy-efficient for water desalination and treatment. However most membranes are based on polymers prepared from fossil petrochemical sources. The development of multilayer membranes for nanofiltration and ultrafiltration, with thin selective layers of naturally available cellulose has been hampered by the availability of non-aggressive solvents. We propose the manufacture of cellulose membranes based on two approaches: (i) silylation, coating from solutions in tetrahydrofuran, followed by solvent evaporation and cellulose regeneration by acid treatment; (ii) casting from solution in 1-ethyl-3-methylimidazolum acetate ([C2mim]OAc), an ionic liquid, followed by phase inversion in water. By these methods porous supports could be easily coated with semi-crystalline cellulose. The membranes were hydrophilic with contact angles as low as 22.0°, molecular weight cut-off as low as 3000 g mol-1 with corresponding water permeance of 13.8 Lm−2 h−1 bar−1. Self-standing cellulose membranes were also manufactured without porous substrate, using only ionic liquid as green solvent. This membrane was insoluble in water, tetrahydrofuran, hexane, N,N-dimethylformamide, 1-methyl-2-pyrrolidinone and N,N-dimethylacetamide.Citation
Cellulose multilayer Membranes manufacture with Ionic liquid 2015 Journal of Membrane SciencePublisher
Elsevier BVJournal
Journal of Membrane ScienceAdditional Links
http://linkinghub.elsevier.com/retrieve/pii/S0376738815004202ae974a485f413a2113503eed53cd6c53
10.1016/j.memsci.2015.05.009