摘要
Nylon 66 membranes prepared by phase inversion method were modified with supercritical CO 2. 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 CO 2 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·m 2·Pa). In the pressure range of 8～14 MPa, the water fluxes was reduced from 13.18×10 -5 g/(s·m 2·Pa) to 4.828×10 -5 g/(s·m 2·Pa), and was raised to 6.411×10 -5 g/(s·m 2·Pa) at pressure over 16 MPa.
Nylon 66 membranes prepared by phase inversion method were modified with supercritical CO 2. 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 CO 2 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·m 2·Pa). In the pressure range of 8～14 MPa, the water fluxes was reduced from 13.18×10 -5 g/(s·m 2·Pa) to 4.828×10 -5 g/(s·m 2·Pa), and was raised to 6.411×10 -5 g/(s·m 2·Pa) at pressure over 16 MPa.
出处
《应用化学》
CAS
CSCD
北大核心
2004年第8期856-858,共3页
Chinese Journal of Applied Chemistry
基金
教育部留学归国人员基金资助项目
关键词
尼龙66膜
超临界CO2
改性
nylon 66 membrane,supercritical carbon dioxide,modification
