Functionalized Polysulfones: Methods for Chemical Modification and Membrane Applications
Functionalized Polysulfones: Methods for Chemical Modification and Membrane Applications
复制标题
功能化聚砜：化学改性和膜应用的方法
DOI：
10.1021/bk-2000-0744.ch010
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
C. M. Tam
中科院分区：
文献类型：
--
作者：
M. Guiver;G. Robertson;M. Yoshikawa;C. M. Tam
锂化化学是一种极其有效的聚砜改性方法。聚砜 (PSf) 可通过锂化试剂快速、定量地活化。通过添加合适的亲电子试剂，锂化中间体可转化为多种官能团类型。本文概述了这种化学的范围和多功能性。聚砜中的官能团可调整膜性能，同时保留聚合物主链的固有稳定性。在超滤 (UF) 中，亲水基团可以提高水通量、减小孔径并具有减少污垢的潜力。同样，亲水基团使耐氯 PSf 可用于纳滤 (NF) 和反渗透 (RO)。气体分离膜高度依赖材料，通过适当选择官能团和位点，可以显着改变溶解度选择性、自由体积分数和链刚性。反应基团为膜提供附着位点和交联能力。
Lithiation chemistry is an extremely effective method for modifying polysulfones. Polysulfones (PSf) are activated rapidly and quantitatively with a lithiating reagent. Lithiated intermediates are converted to a wide array of functional group types by addition of suitable electrophiles. The scope and versatility of this chemistry is outlined in this paper. Functional groups in polysulfones tailor membrane properties, while the inherent stability of the polymer backbone is retained. In ultrafiltration (UF), hydrophilic groups can enhance water flux, reduce pore size, and have the potential for decreased fouling. Similarly, hydrophilic groups enable chlorine resistant PSf to be used in nanofiltration (NF) and reverse osmosis (RO). Gas separation membranes are highly material dependent, and significant changes in solubility selectivity, fractional free volume, and chain rigidity are possible through appropriate choice and site of functional group. Reactive groups provide attachment sites and crosslinking capability to membranes.