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聚碳酸酯(Polycarbonate,PC)和聚对苯二甲酸乙二酯(Polyethylene Terephthalate,PET)薄膜因其可被碱性溶液有效刻蚀而被用于核孔膜材料。采用11.4 MeV·u-1的Au离子和20 MeV·u~(-1)的Kr离子分别辐照PC及PET薄膜,然后经NaOH溶液蚀刻,制得膜孔径分别为20-400 nm和100-700 nm的PC和PET核孔膜。扫描电子显微镜(Scan Electron Microscope,SEM)和气-液排除法等表征和测试结果显示孔密度与辐照剂量有关;蚀刻时间越长,膜孔径越大,实验制备的核孔膜孔分布越均匀。被辐照后的PET膜亲水性比PC膜高。在0.15 MPa和室温下,水溶液中的牛血清白蛋白(Bovine Serum Albumin,BSA)可被不同孔径的PET核孔膜有效截留;膜孔径越小,截留率越高,过滤所需压力越大,膜越易被污染。
Polycarbonate (PC) and Polyethylene Terephthalate (PET) films are used in nuclear apertured film materials because they are effectively etched by alkaline solutions. PC and PET films were irradiated with Au ions of 11.4 MeV · u-1 and Kr ions of 20 MeV · u ~ (-1) respectively, and then were etched with NaOH solution to obtain films with pore diameters of 20-400 nm and 100- 700 nm PC and PET nuclear membrane. Scanning electron microscopy (SEM) and gas-liquid removal and other characterization and test results show that the hole density and dose dependent; the longer the etching time, the larger the film pore size, the more uniform distribution of the experimental nuclear pore membrane. The irradiated PET film is more hydrophilic than the PC film. At 0.15 MPa and room temperature, Bovine Serum Albumin (BSA) in aqueous solution can be efficiently intercepted by PET pore membranes of different pore sizes. The smaller the membrane pore size, the higher the rejection and the greater the pressure required for filtration. The more easily the membrane is contaminated.