【摘要】 采用紫外光接枝的方法在含有光敏性基团的聚丙烯腈超滤膜上接枝了N-异丙基丙烯酰胺(NIPAAm),提出一种制备温敏型分离膜的新方法。采用红外光谱分析和扫描电子显微镜测试技术证明了改性膜表面及膜孔内部PNIPAAm接枝链的存在。当接枝单体NIPAAm浓度为0.4 mol/L时,接枝率出现最大值,达到4.89%;接枝率随着接枝反应温度和时间的增加而增大,但是较高的反应温度(>35℃)和较长的辐照时间(>15 m in)会减缓接枝率的增加。接枝膜的亲水性随接枝率的增大而明显增加。更多还原

【Abstract】 A new method for the preparation of thermal-sensitive membranes was proposed in this paper.Poly(N-isopropylacrylamide)(PNIPAAm) was successfully grafted onto a PAN membrane having photo-sensitive groups by UV photografting method.The FTIR spectrum and SEM photographs confirmed the existence of PNIPAAm chains on the surface and in the pores of the grafted membrane.When monomer concentration reached 0.4 mol/L,a maxium grafting yield of 4.89% could be achieved.An increase on reaction time and temperature favored the increase of grafting yield,but the grafting yield was slowed down at higher reaction temperature(>35 ℃) and longer reaction time(>15 min).In addition,the wettability of grafted membrane was significantly improved with the increasing of grafting yield.更多还原