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Citation: XU Qun, WANG Fei, PENG Qi, PANG Mai-Zhi, WANG Hong-Ying. Modification of Nylon 66 Membrane with Supercritical CO₂[J]. Chinese Journal of Applied Chemistry, ;2004, 21(8): 856-858. shu

Modification of Nylon 66 Membrane with Supercritical CO₂

1.
College of Materials Engineering, Zhengzhou University, Zhengzhou 450052

Corresponding author: XU Qun,
Received Date: 26 August 2003
Available Online: 19 November 2003
Fund Project:

Nylon 66 membranes prepared by phase inversion method were modified with supercritical CO₂. XRD, SEM and water flux measurements were used to assess properties of membrane in modification. The intensity of diffraction peak of modified membrane increased as shown in XRD, it indicates that the degree of crystallinity of the membrane rised after modification. In fact, different structures could be made with CO₂ pressure:cellular structure at 8 MPa and lacy structure at 16 MPa. Water fluxes of the modified membranes were higher than that of the initial nylon 66 membrane which was 2.178×10^-5 g/(s·m²·Pa). In the pressure range of 8~14 MPa, the water fluxes was reduced from 13.18×10^-5 g/(s·m²·Pa) to 4.828×10^-5 g/(s·m²·Pa), and was raised to 6.411×10^-5 g/(s·m²·Pa) at pressure over 16 MPa.
- nylon 66 membrane,
- supercritical carbon dioxide,
- modification
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沈阳化工大学材料科学与工程学院沈阳 110142

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Modification of Nylon 66 Membrane with Supercritical CO2

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Modification of Nylon 66 Membrane with Supercritical CO₂