Formation of Superhydrophobic Microspheres of Poly(vinylidene fluoride-   hexafluoropropylene)/Graphene Composite via Gelation

doi:10.1021/la200982n

CORC > 北京大学 > 化学与分子工程学院

	Formation of Superhydrophobic Microspheres of Poly(vinylidene fluoride- hexafluoropropylene)/Graphene Composite via Gelation
	Zhang, Li ; Zha, Dao-an ; Du, Tingting ; Mei, Shilin ; Shi, Zujin ; Jin, Zhaoxia
刊名	langmuir
	2011
关键词	POLYVINYLIDENE DIFLUORIDE IMMERSION-PRECIPITATION MEMBRANE EMULSIFICATION POLYMER MICROSPHERES PVDF MICROCAPSULES GRAPHENE FILMS SURFACES CRYSTALLINE WETTABILITY POLYSTYRENE
DOI	10.1021/la200982n
英文摘要	We report on the spontaneous formation of superhydrophobic poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)/graphene composite microspheres with uniform size via gelation. When the suspension of PVDF-HFP/graphene (0.25 wt. % with respect to PVDF-HFP) in DMF adsorbs water vapor, it changes to a hybrid gel. A dried porous gel is obtained after solvent exchange and freeze drying. Morphology characterization shows that this hybrid gel is composed of PVDF-HFP/graphene microspheres with a diameter of 8-10 mu m. In contrast, PVDF-HFP solution gives rise to a cellular microstructure following the same experimental procedures. We further elucidate the formation mechanism on the basis of the characterization by freeze fracture transmission electron microscopy, X-ray diffraction, and differential scanning calorimetry characterizations. Furthermore, contact angle measurements of water on PVDF-HFP/graphene indicates that the hydrophobic nature of PVDF-HFP combined with the micro/nanoscale hierarchical texture creates a superhydrophobic surface. Such superhydrophobic microspheres may have potential applications as water-repellent catalyst-supporting materials.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000292617800041&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary; SCI(E); EI; 19; ARTICLE; 14; 8943-8949; 27
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/238786]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Zhang, Li,Zha, Dao-an,Du, Tingting,et al. Formation of Superhydrophobic Microspheres of Poly(vinylidene fluoride- hexafluoropropylene)/Graphene Composite via Gelation[J]. langmuir,2011.
APA	Zhang, Li,Zha, Dao-an,Du, Tingting,Mei, Shilin,Shi, Zujin,&Jin, Zhaoxia.(2011).Formation of Superhydrophobic Microspheres of Poly(vinylidene fluoride- hexafluoropropylene)/Graphene Composite via Gelation.langmuir.
MLA	Zhang, Li,et al."Formation of Superhydrophobic Microspheres of Poly(vinylidene fluoride- hexafluoropropylene)/Graphene Composite via Gelation".langmuir (2011).