期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 36, 期 17, 页码 1553-1558出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201500235
关键词
hierarchical porous structures; high internal phase emulsion; knitting; monoliths; sorption
资金
- program for New Century Excellent Talents in University [NCET-10-0389]
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT)
- National Natural Science Foundation of China [51173058/51273074/21474033]
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.
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