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The focus of this work is to control the structure of electrosprayed polymer microspheres and then study the effect of different structures on the microspheres' adsorption properties. Scanning electron microscopy (SEM) coupled with image analysis software was employed to evaluate the size distributions and the structure of microspheres. According to the observation and analysis results, two types of polyethersulfone (PES) porous microspheres (perfect sphere-shaped and collapsed) were prepared via electrospraying technology by adjusting the solvent and polymer molecular weight. The porous PES microspheres can remove bisphenol A (BPA) from its aqueous solution effectively. Compared with collapsed microspheres, the rough microspheres had much higher specific surface area and better mobility in the BPA aqueous solution, so it showed a better adsorption capacity than that of collapsed microspheres. The solvent evaporation rate and the occurrence rate of phase separation significantly affect the structure and morphology of microspheres. 相似文献
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本文通过酚酞水解的方法制得一种含羧基二酚单体,并将其与1,1-双(4-羟苯基)苯乙烷(BHPPE)和4,4’-二氯二苯砜(DCDPS)进行溶液共缩聚,合成出了侧链含羧基的聚芳醚砜共聚物(10-100)-COOH,其特性黏数达0. 9 g·d L~(-1),并通过红外,核磁(NMR)证实了其化学结构,用差示扫描量热分析(DSC)、热重分析(TGA)、动态热机械扫描分析(DMA)等手段对共聚物的热性能进行了表征,结果表明聚合物具有优良的热性能,其玻璃化转变温度(Tg)为184~246℃,初始分解温度为389~428℃,拉伸强度为57~72 MPa;同时我们将所得树脂制成多孔分离膜,发现其对金属铜离子有较好的分离效果,且随聚合物分子链上的羧基含量的增加,其分离效率呈上升趋势。 相似文献
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