PSF-g-PAA和PSF-g-PNIPAAm的合成及其共混膜的环境响应性研究  

SYNTHESIS OF PSF-g-PAA AND PSF-g-PNIPAAm AND THE ENVIRONMENTALLY RESPONSIVE PROPERTIES OF THEIR BLEND MEMBRANES

作　　者：王建宇[1,2] 徐又一[1] 易砖[1] 朱利平[1] 朱宝库[1] 

机构地区：[1]浙江大学高分子科学研究所高分子合成与功能构造教育部重点实验室,杭州310027 [2]中国石油化工集团公司北京化工研究院,北京100013

出　　处：《高分子学报》2009年第11期1138-1145,共8页Acta Polymerica Sinica

基　　金：国家重大基础研究发展计划(973计划;项目号009CB623402)资助

摘　　要：以氯甲基化双酚A型聚砜（PSF-CH2Cl）为大分子引发剂,通过原子转移自由基聚合法（ATRP）合成了以聚砜（PSF）为疏水主链、分别以聚丙烯酸（PAA）和聚（N-异丙基丙烯酰胺）（PNIPAAm）为亲水侧链的两种梳状两亲性共聚物PSF-g-PAA和PSF-g-PNIPAAm.利用1H-NMR和GPC对合成产物进行表征.然后,分别将PSF-g-PAA和PSF-g-PNIPAAm与PSF进行共混,通过浸没沉淀相转化法制备了共混膜.研究发现,引入20 wt%的两亲性共聚物后,PSF-g-PAA/PSF共混膜的水通量在pH=2-6区间发生明显的变化,即膜的水通量显示出典型的pH响应性;而PSF-g-PNIPAAm/PSF共混膜的纯水通量在20-60℃温度区间显示出典型的温度响应性.To prepare environmentally resporsive（ER） copolymers which are suitable for fabrication of ER polysulfone（PSF） membranes,we designed and synthesized the PSF copolymers with poly（acrylic acid）（PAA） and poly（N-isopropylacrylamide（PNIPAAm） side chains,i.e.PSF-g-PAA and PSF-g-PNIPAAm,respectively.These two comb-like copolymers were synthesized via ATRP by using a chloromethylated polysulfone as macroinitiator.The molar fraction of PAA and PNIPAAm in the resultant copolymers estimated from1H-NMR is 0.538 and 0.896,respectively.In using as additives for PSF membranes prepared by the phase inversion process,the comb-like copolymers segregate to the membrane surfaces,delivering improved porosity,average pore diameters,hydrophilicity,and ER properties compared to pure PSF membranes.For instance,20 wt% PSF-g-PAA/PSF and 20 wt% PSF-g-PNIPAAm/PSF blend membranes can be completely wet by water within 35 s and 90 s,respectively.The flux of the aqueous solution through the 20 wt% PSF-g-PAA/PSF membrane decreases with increasing the solution pH valuse from 1 to 6.The water permeation rate through the 20 wt% PSF-g-PNIPAAm/PSF membrane increases with increasing water temperature from 25℃ to 60℃.

关 键 词：ATRP PSF-g-PAA PSF-g-PNIPAAm 共混 环境响应膜 

分 类 号：O631.3[理学—高分子化学]