论文部分内容阅读
采用可逆加成断裂链转移可控/“活性”聚合方法合成了丙烯腈与N-异丙基丙烯酰胺(NIPAM)的嵌段共聚物,通过调控嵌段聚合反应时间可以获得一系列不同嵌段链长的共聚物,分子量分布在1.3左右.运用静电纺丝技术制备了所合成嵌段共聚物的纳米纤维膜,扫描电镜照片表明纳米纤维膜较为均匀且直径可调.研究了纳米纤维膜表面水接触角与荧光标记牛血清清蛋白的吸附现象,接触角结果证实共聚物纳米纤维膜具有一定的温度响应性,且疏水性嵌段的引入导致响应温度较PNIPAM有所降低;蛋白质吸附结果则表明温度较低时纳米纤维膜表面更亲水,蛋白质吸附较少.所制备的温敏性纳米纤维膜可望用作智能分离与吸附材料.
A block copolymer of acrylonitrile and N-isopropylacrylamide (NIPAM) was synthesized by reversible addition fragmentation chain transfer controllable “living” polymerization method. By adjusting the block polymerization reaction time, a series of different copolymers The molecular weight distribution of the copolymer was about 1.3. The nanofiber membranes of the synthesized block copolymer were prepared by electrospinning technique. The SEM images show that the nanofiber membranes are more uniform and the diameter of the nanofibers is adjustable. The contact angle of the membrane surface and the adsorption phenomenon of the fluorescent labeled bovine serum albumin showed that the copolymer nanofibrous membrane had a certain temperature responsiveness and the introduction of the hydrophobic block led to a decrease in the response temperature compared with PNIPAM. The protein adsorption The results show that the nanofiber membrane is more hydrophilic and less protein adsorbed when the temperature is lower, and the prepared thermo-sensitive nanofiber membrane is expected to be used as an intelligent separation and adsorption material.