静电喷雾法制备聚醚砜多孔微球孔隙率的控制研究

采用静电喷雾法制备了聚醚砜(PES)多孔微球,通过加入亲水性聚合物聚乙烯醇(PEG)和聚乙二醇(PVA)来调控PES多孔微球的孔隙率,利用扫描电子显微镜和热失重法分析仪表征了PES多孔微球的形貌和孔隙率。结果表明,加入亲水性聚合物PEG和PVA均能显著提高PES多孔微球的孔隙率,且随着其添加量的增多,孔隙率呈先增大后减小的趋势;PVA对PES多孔微球孔隙率的调控效果优于PEG,当PVA添加量为3%(质量分数,下同)时,PES多孔微球孔隙率达到最高值91.35%。

Controlling Porosity of PES Porous Microspheres Prepared via Electrospraying

The focus of this work was to effectively control the porosity of microspheres prepared via electrospraying,which would establish the foundation for the following application.Scanning electron microscopy(SEM) and thermogravimetry(TG) were employed to evaluate the morphology and the porosity of microspheres,respectively.According to the investigation result,adding hydrophilic polymer polyethylene glycol(PEG) and polyving akohol(PVA) to electrosprayed solution could effectively control the porosity of microspheres.Specifically adding hydrophilic polymer could improve porosity;and that,with increasing hydrophilic polymer,the porosity of microspheres first increased and then decreased;the control effect of PVA for the porosity of microspheres was better than that of PEG,when the addition of PVA was 3 %,the porosity of microspheres was the highest value of 91.35 %.