染料脱盐纳滤膜分离性能表征-《郑州大学学报(工学版)》

文章信息/Info

Title:: Separation Performance Characterization of ’The NF Membrane With Dye Desalination

Author(s):: ZHANG Hao-qin1; QIN Guo-sheng1; ZHANG Qiu-nan2; MU Wen-rui1; WU Wen-jia1; CHEN Pu1; 1.School of Chemistry Engineering and Energy , Zhengzhou University ,Zhengzhou 450001,China; 2.Zhengzhou HongshengDigital Technology Co. Ltd. , Zhengzhou 450001 ,China

摘要:: 数码喷墨印花用染料目前主要依赖进口,将国产商品染料提纯用于数码喷墨印花有重要的意义.以中试规模装置对本研究所制备的染料脱盐纳滤膜分离性能进行表征,实验结果表明,对于染料活性红与NaCl混合溶液,膜对活性红截留率高于99.5% ,膜对NaCI呈现出负截留现象,该膜的渗透通量高于35 L·m-’·h -’·MPa’;随着操作压差增大,膜的渗透通量增大,但选择性略有降低.上述结果表明,在纳滤膜中同时引入正、负两种固定电荷可以提高有机物的脱盐效率.

Abstract:: The purification of domestically commercial dye for digital inkjet printing has an important signifi-cance since it mainly relies on the import at present. The separation performance of the NF membrane with dyedesalination prepared by our research laboratory was evaluated in pilot scale. For the mixed solution of reactivered/ NaCl/water,the rejection of reactive red by the membrane was higher than 99.5 %,meanwhile the rejec-tion of NaCl by the membrane was negative,and also the permeation flux is higher than 35 L ·m ^-2·h ^-1.MPa^-1. The permeation flux of membrane increased with the operating differential pressure,but the selectivityof membrane decreased slightly. The results show that the desalting efficiency of organics can be improved bysimultaneously introducing positive and negative charge in membrane.