摘 要：本文采用共混改性的方法，将改性凹土（PGS-g-PDMAEMA）添加到铸膜液中，考察不同凝胶条件下，聚偏氟乙烯纯膜与改性膜的静态接触角、纯水通量及孔径、对BSA的静态吸附量以及膜污染指数的影响。实验结果表明，不同添加量的改性凹土凝胶条件不同时，所制得改性膜的纯水通量、修正污染指数和BSA的截留率也发生相应地改变。中性条件下，纯膜对BSA吸附量最小，截留率最大，对蛋白吸附能力最弱；改性膜的纯水通量和修正污染指数最小。同时，与纯膜比较，中性条件下改性膜的接触角最低，亲水性较好。综合考虑，中性条件时，改性膜的性能较优。85716

毕业论文关 键 词：PVDF超滤膜，凝胶条件，膜改性，分离性能

Abstract: In this paper, we added the modified attapulgite (PGS-g-PDMAEMA) to the casting membrane solution with the method of blending modification。 Influences of different gel conditions on PVDF pure membrane and modified membrane were researched。 And we investigated the effects of various parameters on the PVDF ultrafiltration membrane included the static contact angle, the pure water flux and the pore size, the static adsorption capacity of BSA and the membrane fouling index。 The experimental results showed that the water flux, the modified pollution index and the BSA retention rate of the modified membrane had changed with different gel conditions。 Under the neutral condition, the adsorption capacity of BSA adsorbed by the pure membrane was the smallest and the rejection rate was the highest, but the adsorption capacity of the protein was the weakest。 The pure water flux and the modified fouling index of the modified membrane were the smallest。 Compared with the pure membrane, the contact angle of the modified membrane was the lowest and the hydrophilicity was better under the neutral condition。 Generally speaking, when in the neutral condition, the performances of modified membrane were better。 

Keywords: PVDF ultrafiltration membrane, gel condition, membrane modification, separation property

目  录

1  引言 4

1。1  膜分离技术 4

1。2  PVDF超滤膜的制备方法 5

1。3  PVDF超滤膜的改性 6

1。4  主要研究内容 7

2  实验部分 7

2。1  实验药品及仪器 7

2。2  PVDF超滤膜的制备 9

2。3  膜的静态接触角 10

2。4  纯水通量的测试 10

2。5  孔径测量 10

2。6  膜对BSA的静态吸附 10

2。7  BSA的过滤及截留率 11

2。8  修正污染指数（MFI） 11

3  实验结果与分析 12

3。1  静态接触角分析 12

3。2  纯水通量及孔径分析 13

3。3  膜对BSA的静态吸附分析 14

3。4  膜对BSA的过滤及截留率分析 15

3。5  修正污染指数（MFI）分析 16

结  论 17

参 考 文 献