A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Developing thin film composite poly(piperazine-amide) and poly(vinyl-alcohol) nanofiltration membranes
In this work, two different thin film composite (TFC) nanofiltration (NF) membranes were fabricated for water softening: (i) poly(piperazine-amide) and (ii) poly(vinyl-alcohol) (PVA) nanofiltration membranes. The nanofiltration performance of membranes was evaluated by cross flow filtration using NaCl (1 g/l) and MgSO4 (1 g/l) solution at 5 and 10 bar, 25 deg C and 10 l/min. The morphological and hydrophilicity studies were carried out with scanning electron microscopy (SEM), atomic force microscopy (AFM) and contact angle, respectively. Thin film composite poly(piperazine-amide) nanofiltration membrane was prepared by interfacial polymerization of piperazine (PIP) with trimesoyl chloride (TMC). The SEM and AFM studies indicated that a rough and dense film was formed on the polyethersulfone (PES) support membrane by interfacial polymerization. The water permeability of this membrane was 53 and 101 kg m- 2 h- 1 (during salt solution filtration), 57 and 126 kg m- 2 h- 1 (during pure water filtration) at 5 and 10 bar. Moreover, the rejection to the MgSO4 as divalent salt (78 and 70 %) was high compared to the NaCl as monovalent salt (44 and 35 %). In second type, thin film composite poly(vinyl-alcohol) (PVA) nanofiltration membrane was prepared by dip coating and cross-linking with glutaraldehyde. In the case of PVA membrane, a thick and smooth film was formed. This membrane shows the water permeability of 60 and 109 kg m- 2 h- 1 (during salt solution filtration), 69 and 135 kg m- 2 h- 1 (during pure water filtration) and the rejection of 25 and 20 % for NaCl and 72 and 63 % for MgSO4 at two different pressures. Moreover, these two NF membranes exhibited structural and performance stabilities. The calculated pore radius and thickness-to-porosity (Delta X / AK) ratio by the modified Nernst-Plank equation confirmed the obtained results of rejection data of the synthesized membranes.
Developing thin film composite poly(piperazine-amide) and poly(vinyl-alcohol) nanofiltration membranes
In this work, two different thin film composite (TFC) nanofiltration (NF) membranes were fabricated for water softening: (i) poly(piperazine-amide) and (ii) poly(vinyl-alcohol) (PVA) nanofiltration membranes. The nanofiltration performance of membranes was evaluated by cross flow filtration using NaCl (1 g/l) and MgSO4 (1 g/l) solution at 5 and 10 bar, 25 deg C and 10 l/min. The morphological and hydrophilicity studies were carried out with scanning electron microscopy (SEM), atomic force microscopy (AFM) and contact angle, respectively. Thin film composite poly(piperazine-amide) nanofiltration membrane was prepared by interfacial polymerization of piperazine (PIP) with trimesoyl chloride (TMC). The SEM and AFM studies indicated that a rough and dense film was formed on the polyethersulfone (PES) support membrane by interfacial polymerization. The water permeability of this membrane was 53 and 101 kg m- 2 h- 1 (during salt solution filtration), 57 and 126 kg m- 2 h- 1 (during pure water filtration) at 5 and 10 bar. Moreover, the rejection to the MgSO4 as divalent salt (78 and 70 %) was high compared to the NaCl as monovalent salt (44 and 35 %). In second type, thin film composite poly(vinyl-alcohol) (PVA) nanofiltration membrane was prepared by dip coating and cross-linking with glutaraldehyde. In the case of PVA membrane, a thick and smooth film was formed. This membrane shows the water permeability of 60 and 109 kg m- 2 h- 1 (during salt solution filtration), 69 and 135 kg m- 2 h- 1 (during pure water filtration) and the rejection of 25 and 20 % for NaCl and 72 and 63 % for MgSO4 at two different pressures. Moreover, these two NF membranes exhibited structural and performance stabilities. The calculated pore radius and thickness-to-porosity (Delta X / AK) ratio by the modified Nernst-Plank equation confirmed the obtained results of rejection data of the synthesized membranes.
Developing thin film composite poly(piperazine-amide) and poly(vinyl-alcohol) nanofiltration membranes
Jahanshahi, Mohsen (author) / Rahimpour, Ahmad (author) / Peyravi, Majid (author)
Desalination ; 257 ; 129-136
2010
8 Seiten, 30 Quellen
Article (Journal)
English
| British Library Online Contents | 2015
| British Library Online Contents | 2016
Antioxidation performance of poly(vinyl alcohol) modified poly(vinylidene fluoride) membranes
| British Library Online Contents | 2018
| British Library Online Contents | 2013
Antioxidation performance of poly(vinyl alcohol) modified poly(vinylidene fluoride) membranes
| British Library Online Contents | 2018