Single-step preparation of nanocomposite polyamide 6 hollow fiber membrane with integrally skinned asymmetric structure for organic solvent nanofiltration
- Publisher:
- Elsevier
- Publication Type:
- Journal Article
- Citation:
- Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2021, 620, pp. 1-8
- Issue Date:
- 2021-07-05
Closed Access
| Filename | Description | Size | |||
|---|---|---|---|---|---|
| 1-s2.0-S0927775721004076-main.pdf | 4.66 MB |
Copyright Clearance Process
- Recently Added
- In Progress
- Closed Access
This item is closed access and not available.
An integrally skinned organic solvent-resistant membrane with asymmetric structure for organic solvent nanofiltration (OSN) application was developed via thermally induced phase separation (TIPS) of nanocomposite polyamide 6. The nanocomposite polyamide 6 contains intercalated silicate sheets, which could improve the mechanical properties of the resultant membrane, as well as mitigate swelling after exposure in solvent. The influence of nanocomposite polyamide 6 composition of the hollow fiber membrane and the subsequent thermal annealing was investigated in this study. Crystallinity data revealed that polyamide 6 crystal formed during the TIPS process was primarily α-phase type, but the use of nanocomposite polymer initiated the formation of γ-type crystalline structure. Thermal annealing at 120 °C was also found to even promote a higher overall crystallinity of the membranes. The membranes were subjected for OSN operation with methanol (MeOH) as solvent and cyanocobalamin (vitamin B12) as the solute. The intercalated silicate sheets in the nanocomposite polyamide 6 brought about the dense outer surface and sublayer formation, resulting in higher mechanical properties and stability in MeOH; however, the membranes formed with purely nanocomposite polyamide 6 suffered from very low permeance, primarily due to the dense outer surface and sublayer. The membrane whose composition is 50% nanocomposite polyamide 6 exhibited MeOH permeance of 0.1 L m−2 h−1 bar−1 and vitamin B12 rejection of over 99.0%. This work was able to provide how polymeric material, thermal annealing, and the resultant crystallinity could affect the membrane's mechanical properties and filtration performance with solvent resistance.
Please use this identifier to cite or link to this item: