Yang Xinjia, Tan Liangxiao, Xia Lingling, Wood Colin D, Tan Bien
Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
CSIRO Manufacturing Flagship, Clayton, VIC, 3168, Australia.
Macromol Rapid Commun. 2015 Sep;36(17):1553-8. doi: 10.1002/marc.201500235. Epub 2015 Jul 15.
Hierarchical porous polystyrene monoliths (HCP-PolyHIPE) are obtained by hypercrosslinking poly(styrene-divinylbenzene) monoliths prepared by polymerization of high internal phase emulsions (PolyHIPEs). The hypercrosslinking is achieved using an approach known as knitting which employs formaldehyde dimethyl acetal (FDA) as an external crosslinker. Scanning electron microscopy (SEM) confirms that the macroporous structure in the original monolith is retained during the knitting process. By increasing the amount of divinylbenzene (DVB) in PolyHIPE, the BET surface area and pore volume of the HCP-PolyHIPE decrease, while the micropore size increases. BET surface areas of 196-595 m(2) g(-1) are obtained. The presence of micropores, mesopores, and macropores is confirmed from the pore size distribution. With a hierarchical porous structure, the monoliths reveal comparable gas sorption properties and potential applications in oil spill clean-up.
通过对由高内相乳液（PolyHIPEs）聚合制备的聚（苯乙烯 - 二乙烯基苯）整体材料进行超交联，可得到分级多孔聚苯乙烯整体材料（HCP - PolyHIPE）。超交联是通过一种称为编织的方法实现的，该方法使用甲醛二甲基缩醛（FDA）作为外部交联剂。扫描电子显微镜（SEM）证实，在编织过程中原整体材料的大孔结构得以保留。通过增加PolyHIPE中二乙烯基苯（DVB）的含量，HCP - PolyHIPE的BET表面积和孔体积减小，而微孔尺寸增大。获得的BET表面积为196 - 595 m² g⁻¹。从孔径分布证实了微孔、介孔和大孔的存在。具有分级多孔结构的整体材料显示出相当的气体吸附性能以及在溢油清理方面的潜在应用。
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