Surface-modified zeolite-filled poly(piperazine-amide)/polysulfone composite membrane for potassium extraction
Polysulfone (PS) hollow fiber microporous membrane was used as substrate,the micropores of which were filled with surface-modified zeolites suspension on the outer surface by vacuum method,and then zeolite-filled poly(piperazine-amide)/PS hollow fiber composite membrane was synthesized on the substrate by interfacial polymerization reaction with piperazine (PIP) aqueous solution and trimesoyl chloride (TMC) n-hexane solution.The substrate membrane and synthetic composite membrane were characterized by scanning electron microscopy (SEM).A thin poly(piperazine-amide) active skin layer was synthesized on the substrate and the surface-modified zeolite particles were successfully embedded in the surface micropores of the substrate.The separation factors of the sample to K+ are 4.25,60.46 and 93.61 in the mixed K+-Na+,K+-Ca2+ and K+-Mg2+ solutions respectively,which indicates that the sample has preference selectivity to K+ and can be used as a potential ion-exchange membrane for potassium continuous extraction from seawater.
Zeolite Poly(piperazine-amide) Composite membrane Ion-exchange property Potassium extraction
Jin Hou Junsheng Yuan Ru Shang
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100,China;Engin Engineering Research Center of Seawater Utilization Technology, Ministry of Education, Hebei Univers College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100,China
国际会议
广州
英文
186-189
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）