Preparation of Hollow/Porous Polymeric Microspheres based on OH-HPEEK and PVA

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• 作者：Chunfeng Zhang^a ; Guibin Wang^a ; Xiujie Li^b ; Shuling Zhang^a ; ^{zsl@jlu.edu.cn}
• 关键词：Hyperbranched poly (ether ether ketone) ; Microsphere ; Hollow core ; Porous shell ; Colloidal processing ; Electron microscopy
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：1 May, 2012
• 卷：74
• 期：Complete
• 页码：85-88
• 文件大小：649 K

摘要

The formation of polymer microspheres based on rigid polymer (hydroxyl-terminated trifluoromethylphenyl substituted hyperbranched poly ether ether ketone, OH-HPEEK) and flexible polymer (polyvinyl alcohol, PVA) in tetrahydrofuran/water (THF/H₂O) system was studied. The results of SEM and TEM showed that such a rigid-coil polymer pair could form the microspheres with hollow core/porous shell structure. Moreover, the formation of the hollow core/porous shell structure not only depended on the concentrations of PVA and OH-HPEEK, but also on the structure of OH-HPEEK. A formation mechanism (combination of self-assemble and solvent evaporation method) of the hollow/porous polymer microspheres was proposed based on the experimental process and results.