论文部分内容阅读
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.
(PSF) as the hydrophobic backbone was synthesized by atom transfer radical polymerization (ATRP) using chloromethylated bisphenol A polysulfone (PSF-CH2Cl) as the macromolecular initiator. Polyacrylic acid PAA) and poly (N-isopropylacrylamide) (PNIPAAm) as hydrophilic side chains were synthesized by 1H-NMR and GPC And then the PSF-g-PAA and PSF-g-PNIPAAm were blended with PSF, and the blend membrane was prepared by immersion precipitation phase inversion method.The results showed that the introduction of 20 wt% amphiphilic copolymer The water flux of PSF-g-PAA / PSF blend membrane changed obviously at pH = 2 ~ 6, that is membrane water flux showed typical pH responsiveness; while PSF-g-PNIPAAm / The pure water flux of PSF blend membrane shows typical temperature responsiveness in the temperature range of 20 ~ 60 ℃.