以荷负电的聚砜超滤膜为基膜,采用静态层层自组装技术,制备了PDADMAC/PSS多层聚电解质纳滤膜.考察了支撑盐的种类、浓度、自组装层数对膜的分离性能、荷电性能、亲水性等的影响.研究结果表明,以NaCI为支撑电解质制得的膜具有较高的性能,聚合电解质溶液中支撑电解质的浓度以0.5 mol/L为宜；在较优的条件下所制备的(PDADMAC/PSS)5对2 g/L Na2SO4的截留率可达93％,通量在1.0 MPa下接近60 L/(m2·h),对NaCl的截留率仅为9％～13％,通量可达80 L/(m2·h).膜表面的荷电量和接触角的变化均反映了聚电解质的交替自组装.以PSS为最外层的膜表面具有很好的负电性和很低的接触角.随着双层数的增加,膜表面的负电荷量的绝对值先逐渐增大,达到一个极大值后又逐渐减少,说明层数并非越多越好；以PSS作为最外层的膜具有很好的亲水性.
参考文献
| [1] | Jin WQ.;Toutianoush A.;Tieke B. .Use of polyelectrolyte layer-by-layer assemblies as nanofiltration and reverse osmosis membranes[J].Langmuir: The ACS Journal of Surfaces and Colloids,2003(7):2550-2553. |
| [2] | E1-Hashani A;Toutianoush Ali;Tieke Bernd .Use of layer-by-layer assembled ultrathin membranes of dicopper-[18]azacrown-N6 complex and polyvinylsulfate for water desalination under nanofiltration conditions[J].Journal of Membrane Science,2008,318:65-70. |
| [3] | Hong SU;Malaisamy R;Bruening ML .Optimization of flux and selectivity in Cl-/SO42- separations with multilayer polyelectrolyte membranes[J].Journal of Membrane Science,2006(1/2):366-372. |
| [4] | Hong SU;Miller MD;Bruening ML .Removal of dyes, sugars, and amino acids from NaCl solutions using multilayer polyelectrolyte nanofiltration membranes[J].Industrial & Engineering Chemistry Research,2006(18):6284-6288. |
| [5] | Ramamoorthy Malaisamy;Merlin L.Bruening .High-Flux Nanofiltration Membranes Prepared by Adsorption of Multilayer Polyelectrolyte Membranes on Polymeric Supports[J].Langmuir: The ACS Journal of Surfaces and Colloids,2005(23):10587-10592. |
| [6] | Deng Huiyu;Xu Youyi;Zhu Baoku et al.Polyelectrolyte membranes prepared by dynamic self-assembly of poly (4-styrenesulfonic acid-co-maleic acid) sodium salt (PSS/MA) for nanofiltration (I)[J].Journal of Membrane Science,2008,323:125-133. |
| [7] | 邓慧宇,朱宝库,魏秀珍,徐又一.PSS、PSS-co-MA/PAH动态自组装制备荷正电纳滤膜[J].功能材料,2008(08):1313-1317. |
| [8] | 曹志源;方建慧;刘达 等.PSS/PAH聚电解质复合纳滤膜制备及其性能研究[J].功能材料,2007,38:2727-2703. |
| [9] | 刘达,方建慧,曹志源,沈霞,施利毅.PES基膜表面PSS/PDADMAC多层膜的构筑及其离子截留性能[J].上海大学学报（自然科学版）,2008(04):423-427. |
| [10] | 徐又一;徐志康.高分子膜材料[M].北京:化学工业出版社,2005 |
| [11] | 沈家骢;王敏;计剑.超分子层结构组装与功能[M].北京:科学出版社,2005:16. |
| [12] | 金谷.表面活性剂化学[M].合肥:中国科学技术大学出版社,2008:83. |
| [13] | Adusumilli, M;Bruening, ML .Variation of Ion-Exchange Capacity, zeta Potential, and Ion-Transport Selectivities with the Number of Layers in a Multilayer Polyelectrolyte Film[J].Langmuir: The ACS Journal of Surfaces and Colloids,2009(13):7478-7485. |
| [14] | Rashida N Smith;Linca Reven;Christopher J Barrett .13C solid-state NMR study of polyelectrolyte multilayers[J].Macromolecules,2003,36:1876-1881. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%