Structural control of polysulfone membrane by using dimethylacetamide and water-pressure for water treatment
- PDF / 1,274,574 Bytes
- 4 Pages / 595 x 842 pts (A4) Page_size
- 62 Downloads / 173 Views
pISSN: 0256-1115 eISSN: 1975-7220
INVITED REVIEW PAPER
INVITED REVIEW PAPER
Structural control of polysulfone membrane by using dimethylacetamide and water-pressure for water treatment Jeonghyun Hwang*, Hwa Jin Lee*, and Sang Wook Kang*,**,† *Department of Chemistry, Sangmyung University, Seoul 03016, Korea **Department of Chemistry and Energy Engineering, Sangmyung University, Seoul 03016, Korea (Received 21 January 2020 • Revised 7 April 2020 • Accepted 12 April 2020) AbstractA method for separating sodium alginate through polysulfone (PSf) support by dimethyl acetamide (DMAc) and hydraulic treatment was studied. After exposing the PSf support to DMAc solvent, water pressure was applied onto the polymer support. As a result, the sponge-type structures were connected to each other and the porosity of the modified PSf increased. In addition, the support pressurized for 3 minutes at 8 bar had the highest value of 133 L/m2h and removal rate of 95.0% for sodium alginate filtration test. When the PSf support was immersed in an organic solvent, the interaction between the chains of the PSf was weakened, while when water pressure was applied, pores were generated. These results were confirmed by SEM, FT-IR and porosimeter data. Keywords: Polysulfone, Porosity, Dimethylacetamide, Water-pressure
erization [5]. The substrate was comprised of macrovoid layer in sandwich structures and the NF membrane showed high water permeability [5]. Nunes et al. prepared nanostructured hydrophobic polyazole membranes to achieve water recovery with low-energy [6]. Aromatic fluorinated polyoxadiazoles and polytriazoles were synthesized by using phase inversion and electrospinning process. Desalination tests were conducted with sea water. Salt selectivity was of 99.95% and water flux was 85 L m2 h1 [6]. In addition, Marais et al. fabricated supported ionic liquid membranes (SILMs) by immobilizing ionic liquids in porous Matrimid membrane [7]. They used water vapor-induced phase inversion method and applied the membranes for separating water and volatile organic compounds (VOCs). [C4C1im][BF4] showed best sorption capacity and selectivity. The membrane permeability increased in the following order: cyclohexane
Data Loading...
