Free-radical graft copolymerisation of fluorine nanocellulose surfactants

编号 020018905

推送时间 20190603

研究领域 林产化工 

年份 2019 

类型 期刊 

语种 英语

标题 Free-radical graft copolymerisation of fluorine nanocellulose surfactants

来源期刊 SURFACE INNOVATIONS

期 第189期

发表时间 20190409

关键词 cellulose;  nanocomposites;  surfacetension; 

摘要 Nanocellulose surfactants (CSFs) were prepared by grafting sodium allyl sulfonate (C3H5NaO3S) and trifluoroethyl methacrylate (C6H7F3O2) into nanocellulose through free-radical graft copolymerisation. The copolymerisation was carried out by one-step and two-step approaches to preparing CSF-1 and CSF-2 surfactants, respectively. The structure and properties of CSF-1 and CSF-2 were characterised by infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and surface/interfacial tension measurement. Compared with CSF-1, which was prepared with the one-step approach, a higher fluorine (F) content and a lower crystallinity degree were detected for CSF-2, which was prepared with the two-step approach. The surface tension, critical micelle concentration and oil/water interfacial tension values of the CSFs were 32.5 mN/m, 0.36 g/l and 4.8 x 10(-2) mN/m, respectively, for CSF-1 and 27.4 mN/m, 0.33 g/l, 1.9 x 10(-2) mN/m, respectively, for CSF-2. The lower surface and interfacial tensions confirmed that CSF-2 was endowed with superior surface activity and oil-displacement efficiency. Additionally, CSF-2 displayed enhanced emulsification power in comparison with CSF-1.

服务人员 尚玮姣

PDF文件 浏览全文