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超临界CO_2对尼龙66膜的改性

许群;王飞;彭琦;庞买只;王红英

  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. Theintensity of diffraction peak of modified membrane increased as shown in XRD, it indicates that the degree ofcrystallinity 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 thepressure range of 8~14 MPa, the water fluxes was reduced from 13.18×10-5 g/(s·m2·Pa) to4.828×10-5 g/(s·m2·Pa), and was raised to 6.411×10-5 g/(s·m2·Pa) at pressure over 16 MPa.……   
[关键词]:尼龙66膜;超临界CO2;改性
[文献类型]:期刊
[文献出处]: 《应用化学2004年08期
[格式]:PDF原版; EPUB自适应版(需下载客户端)