辐射接枝制备中空纤维纳滤膜的性能研究

功能材料, 2012, 43(13): 1806-1809.

辐射接枝制备中空纤维纳滤膜的性能研究

王晓磊 ^1, , 魏俊富 ^2, , 代昭 ^3, , 杨亮 ^4, , 张环 ^5, , 赵孔银 ^6,

1.中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387 天津工业大学材料科学与工程学院,天津300387

2.中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387 天津工业大学环境与化学工程学院,天津300387

3.中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387 天津工业大学环境与化学工程学院,天津300387

4.中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387 天津工业大学环境与化学工程学院,天津300387

5.中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387 天津工业大学环境与化学工程学院,天津300387

6.中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387 天津工业大学材料科学与工程学院,天津300387

基金项目: 天津市应用基础及前沿技术研究计划资助项目(09JCZDjC23200) 国家自然科学基金资助项目(51078264) 天津市科技创新专项资金资助项目(10FDZDSW01500)

关键词：等离子体 , 中空纤维 , AMPS , 纳滤 , 荷负电

Study on properties of hollow fiber nanofiltratiton membrane prepared by radiation graft polymerization

Keywords： plasma , hollow fiber , AMPS , nanofiitration , negatively charged

对以聚砜（PSF）中空纤维超滤膜为基体，通过低温等离子体辐照接枝2-丙烯酰胺基-2-甲基丙磺酸（AMPS）制备的纳滤膜的结构和性能进行了研究。结果表明，这种方法可以制得断裂强力高于PSF基膜，孔径约为2.6nm和纯水渗透系数为44．3L／（m2·h·MPa）的纳滤膜。在25℃，0．4MPa下对300mg／L的K2SO4、Na2SO4、MgSO4、KCl、NaCl和MgCl：的截留率为89．3％、88．3％、52％、39．6％、37．4％和13．2％，表明该纳滤膜为荷负电膜，对无机盐的截留主要依靠Donnan效应。

The structure and properties of the nanofiltration i NF） membrane was studied, which was prepared by grafting of 2-acrylamido-2-methylpropanesulfonic acid （AMPS） on the polysulfone （PSF） hollow fiber ultra- filtration membrane using low-temperature plasma-induced graft polymerization. The results showed that the pore size of NF membrane was 2.6nm and the pure water permeability was 44.3L/（m2 h MPa）, meanwhile, the breaking strength of NF membrane was higher than that of PSF substrate. At a temperature of 25℃ and a operating pressure of 0.4MPa, the rejection to 300mg/L K2SO4, Na2SO4, MgSO4, KCl, NaCl and MgCl2 were 89.3%, 88.3%, 52%, 39.6%, 37.4% and 13.2%, respectively, which indicated that the NF membrane was a negatively charged NF membrane and the rejection to salts was mainly depended on Donnan effect.

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