聚电解质层层自组装纳滤膜

第22卷第1期2010年1月

化 学 进 展

PROGRESS I N C HE M I STRY

Vo.l 22N o .1

Jan .,2010

收稿:2009年1月,收修改稿:2009年4月

*国家重点基础研究发展计划(973)项目(N o .2009CB623402)和国家自然科学基金项目(No.20606028;50633030)资助**Correspond i ng author e m a i:l anq@f zj u .edu .cn

聚电解质层层自组装纳滤膜

*

计艳丽2

安全福

1**

钱锦文1

陈欢林2

高从堦

2,3

(1.浙江大学高分子科学与工程学系教育部高分子合成与功能构造重点实验室 杭州310027;

2.浙江大学化学工程与生物工程学系 杭州310027;

3.杭州水处理技术研究开发中心 杭州310012)

摘 要 层层自组装技术能够方便地对膜的微观结构和组成进行调控,已在制备复合型纳滤膜方面取得了迅速的发展。本文综述了近年来用于聚电解质层层自组装纳滤膜的制备方法、种类以及影响因素。介绍了静态层层交替沉积、压力驱动自组装和电场强化自组装等3种制备方法;归纳了均聚型、共聚型和有机/

无机杂化型等3类用于层层自组装纳滤膜的聚电解质的特点;讨论了聚电解质的荷电性、电荷密度和电离程度等因素对其自组装膜分离性能的影响。总结了聚电解质自组装纳滤膜在水处理和有机溶剂中物质的分离等方面的应用。同时,对提高聚电解质自组装纳滤膜的组装效率、分离性能和发展方向提出了设想和建议。

关键词 聚电解质 层层自组装 纳滤膜

中图分类号:0631;TB383;TQ028.8 文献标识码:A 文章编号:1005 281X (2010)01 0119 06

N anofiltration M e mbranes Prepared by L ayer by Layer Self A sse mbly

of Pol yelectrolyte

J i Yanli 2

An Quanfu

1**

Q ian J inw en 1 ChenH uanli n 2 Gao C ongjie

2,3

(1.K ey Laboratory o fM acro m o lecu lar Synthesis and Functionalization ,M i n istry of Educati o n,

Depart m ent o f Po l y m er Sc ience and Eng i n eering ,Zhejiang Un i v ersity ,H angzhou 310027,Ch i n a ;2.Depart m ent o f Che m ica lEngineeri n g and B ioeng i n eering ,Zhejiang Un i v ersity ,H angzhou 310027,

Ch i n a ;3.Deve l o p m ent Center o fW ater T reat m ent Techno logy ,H angzhou 310012,Ch i n a)

Abst ract U ltrath i n co m posite nano filtration (NF)m e m branes fabricated by layer by layer (LbL)asse m bly technique ,w hich can precise l y con tro l structures and co m positions ,has rece i v ed a rapi d developm en.t In t h is pa per ,a rev i e w is presen ted on LbL asse m b l y m ethods ,types o f po l y electr o lytes and infl u enci n g factors o fLbL asse m

b ly NF m e mbranes in recent years .Three d ifferen t approaches for LbL asse m b l y are m a i n ly i n troduced ,i n cluding t h e conventi o na l e lectrostati

c depositi o n m etho

d ,th

e pressure driven LbL asse m b l y and the electric fi e l d enhanced LbL asse mb ly .The types o

f the self asse m bled polyelectr o lyte m aterials ,wh ich can be classified i n to ho m opo l y m er ,copo l y m er ,and organic i n organ ic hybrid po lyelectro l y tes are carried ou.t Separation perfor m ances ofNF m e m brane i n fl u enced by var i o us factors ,such as the charge character ,the charge density and the i o nization degree of the po l y e l e ctrolyte are discussed .The app lications of LbL asse m bly NF m e m brane for w ater treat m en t and substances separati o n fro m organic so l v ent are su mm arized .A t the sa m e ti m e ,so m e propose of speed i n

g up the asse m bly process ,i m pr ov i n g the perfor m ance and deve l o p m ent orientati o n ofNF m e m branes are presen ted .

K ey w ords po lye lectrolyte ;layer by layer se lf asse m bly ;nano filtration m e mbranes