以吡咯为改性材料，采用浸渍表面改性法，对普通均相阳离子交换膜进行表面改性来制备单价选择性阳离子交换膜。通过电渗析试验，研究不同制备因素对改性膜选择分离性能的影响，从而优化制膜条件。并在最佳制备条件下，对改性膜进行膜面表征与基本性能测试。结果表明：最佳制膜条件为浸渍温度为40℃，浸渍时间为6h，吡咯浓度为0.2mol/L，氧化剂浓度与种类为0.8mol/L的FeCl3；膜改性后表面更为平整，离子交换容量、含水率与溶胀度分别为0.78mmol/g、17.3%与8.5%；Ca2+的泄漏率仅为7.7%，Na+的透过率为60.3%，选择透过性系数可达7.8，有优良的离子选择分离性能。

 Using pyrrole as the modification material and surface impregnation as the modification method, the monovalent selective cation exchange membranes are prepared by modifying the ordinary homogeneous cation exchange membrane. The influence of different factors on the separation performance of the membranes is studied by the electrodialysis experiment, thereby optimizing the membrane preparation conditions. Under the optimal preparation conditions, the surface characterization and basic properties of the modified membrane are tested. The results show that the optimum condition of membrane preparation is determined as follows: the impregnation temperature is 40℃, the impregnation time is 6 hours, the pyrrole concentration is 0.2mol/L, the oxidant concentration and type is 0.8mol/L FeCl3；the surface of modified membrane is smoother, the ion exchange capacity, water content and swelling degree are 0.78mmol/g, 17.3% and 8.5%; the leakage rate of Ca2+ is only 7.7%, the transmission rate of Na+ is 60.3%, and the selective permeability coefficient is 7.8, It has excellent ion selective separation performance.

[1]葛倩倩，葛亮，汪耀明，等. 离子交换膜的发展态势与应用展望[J]. 化工进展，2016，35(6)：1774-1785. 
[2]Ran J, Wu L, He Y, et al. Ion Exchange Membranes: New Developments and Applications[J]. Journal of Membrane Science, 2017, 522: 267-291.
[3]Nagarale R K, Gohil G S, Shahi V K. Recent developments on ion-exchange membranes and electro-membrane processes[J]. advances in colloid & interface science, 2006, 119(2-3): 97-130.
[4]关文学，王三反，李艳红.概述离子交换膜的发展及前景应用[J].应用化工，2019，48(4)：888-892.
[5]He Y, Ge L, Fu Z, et al. Monovalent cations permselective membranes with zwitterionic side chains[J]. Journal of Membrane Science, 2018, 563: 320-325.
[6]Ge L, Wu B, Yu D, et al. Monovalent cation perm-selective membranes (MCPMs): New developments and perspectives[J]. Chinese Journal of Chemical Engineering, 2017, 25(11): 1606-1615.
[7]Hao L, Liao J, Jiang Y, et al. “Sandwich”-Like Structure Modified Anion Exchange Membrane with Enhanced Monovalent Selectivity and Fouling Resistant[J]. Journal of Membrane Science, 2018, 556: 98-106.
[8]Sata T. Modification of properties of ion-exchange membranes. IV. Change of transport properties of cation-exchange membranes by various polyelectrolytes[J]. Journal of Polymer Science Part A Polymer Chemistry, 1978, 16(5): 1063-1080.
[9]Sata T, Sata T, Yang W. Studies on cation-exchange membranes having permselectivity between cations in electrodialysis[J]. Journal of Membrane Science, 2002, 206(1-2): 31-60.
[10]Kumar M, Tripathi B P, Shahi V K. Ionic transport phenomenon across sol-gel derived organic–inorganic composite mono-valent cation selective membranes[J]. Journal of Membrane Science, 2009, 340(1-2): 52-61.
[11]Balster J, Krupenko O, Punt I, et al. Preparation and characterisation of monovalent ion selective cation exchange membranes based on sulphonated poly(ether ether ketone)[J]. Journal of Membrane Science, 2005, 263(1-2): 137-145.
[12]Gohil G S, Nagarale R K, Binsu V V, et al. Preparation and characterization of monovalent cation selective sulfonated poly(ether ether ketone) and poly(ether sulfone) composite membranes[J]. Journal of Colloid and Interface Science, 2006, 298(2): 845-853.
[13]Chapotot A, Pourcelly G, Gavach C, et al. Electrotransport of proton and divalent cations through modified cation-exchange membranes[J]. Journal of Electroanalytical Chemistry, 1995, 386(1-2):25-37.
[14]Gohil G S, Binsu V V, Shahi V K. Preparation and characterization of mono-valent ion selective polypyrrole composite ion-exchange membranes[J]. Journal of Membrane Science, 2006, 280(1-2): 210-218.
[15]姚婷婷. 长效型单价选择性阳离子交换膜的制备与表征[D]. 青岛：中国海洋大学，2013.
[16]Amara M, Hacène K. Modified membranes applied to metallic ion separation and mineral acid concentration by electrodialysis[J]. Separation and Purification Technology, 2002, 29(1): 79-87.
[17]Lambert J, Avila-Rodriguez M, Durand G, et al. Separation of sodium ions from trivalent chromium by electrodialysis using monovalent cation selective membranes[J]. Journal of Membrane Science, 2006, 280(1-2):219-225.
[18]胡圆. 单价选择性阳离子交换膜的制备及应用初探[D]. 青岛：中国海洋大学，2009.
[19]王汉敏，高学理，胡圆，等.单价选择性均相阳离子交换膜的制备及性能[J]. 膜科学与技术，2011，31(5)：6-12，33.
[20]李健.单价选择性阳离子交换膜的制备和表征[D]. 杭州：浙江工业大学，2015.
[21]Cheng C, White N, Shi H, et al. Cation separations in electrodialysis through membranes coated with polyelectrolyte multilayers[J]. Polymer, 2014, 55(6): 1397-1403.
[22]White N, Misovich M, Yaroshchuk A, et al. Coating of Nafion Membranes with Polyelectrolyte Multilayers to Achieve High Monovalent/Divalent Cation Electrodialysis Selectivities[J]. ACS Applied Materials & Interfaces, 2015, 7(12): 6620-6628.
[23]Afsara N U, Shehzada M A, Irfana M, et al. Cation exchange membrane integrated with cationic and anionic layers for selective ion separation via electrodialysis[J]. Desalination, 2019, 458: 25-33.
[24]Wang M, Jia Y X, Yao T T, et al. The endowment of monovalent selectivity to cation exchange membrane by photo-induced covalent immobilization and self-crosslinking of chitosan[J]. Journal of Membrane Science, 2013, 442: 39-47.
[25]葛亮. 单价阳离子选择性分离膜的制备与表征[D]. 合肥：中国科学技术大学，2014.
[26]Le X T, Viel P, Jégou P, et al. Diazonium-induced anchoring process: an application to improve the monovalent selectivity of cation exchange membranes[J]. Journal of Materials Chemistry, 2010, 20(18): 3750.
[27]Luo T, Abdu S, Wessling M. Selectivity of Ion Exchange Membranes: A Review[J]. Journal of Membrane Science, 2018, 201, 555: 429-454.
[28]Kameche M, Xu F, Innocent C, et al. Characterisation of Nafion®117 membrane modified chemically with a conducting polymer: An application to the demineralisation of sodium iodide organic solutions[J]. Separation & Purification Technology, 2007, 52(3): 497-503.
[29]任丽，张雪峰，王立新，等. 化学氧化法聚吡咯导电性能与导电机理[J]. 半导体学报，2007，28(9)：1396-1401.
[30]苏琬. 离子交换膜表面改性的研究—聚吡咯浸渍改性阳膜[D]. 兰州：兰州交通大学，2017.
[31]Farrokhzad H, Moghbeli M R, Van Gerven T, et al. Surface modification of composite ion exchange membranes by polyaniline[J]. Reactive and Functional Polymers, 2015, 86: 161-167.
[32]Hu Y, Wang M, Wang D, et al. Feasibility study on surface modification of cation exchange membranes by quaternized chitosan for improving its selectivity[J]. Journal of Membrane Science, 2008, 319(1-2):5-9.