Being immersed in the solution of 12-hydroxy stearic acid,the super-hydrophobic coating is fabricated on the surface of zinc substrate on which surface oxidized layer is removed by etching with hydrofluoric acid.The surface morphologies,compositions and wettability are investigated with field emission scanning electron microscopy(FE-SEM),Fourier transform infrared spectroscopy(FT-IR) and contact angle test.The results show that the surface morphologies and wettability can be controlled by drying temperature and time.The flower-like hierarchical micro-nanostructures comprised of nanotubes are generated on zirc substrate at 50 ℃ and 24 h,and with an utmost contact angle(CAs)of 159.2°.

A kind of highly oil-absorbing resin is successfully prepared by an emulsion polymerization procedure using lauryl methacrylate as a monomer,N,N′-methylene bisacrylamide as a crosslinking agent,OP-10 and sodium dodecyl benzene sulfonate as composite emulsifier.Surface morphology,thermal stability and chemical composition of the prepared resin are characterized by scanning electron microscopy(SEM),thermal gravity analysis(TG) and infrared spectroscopy(IR),respectively.Experimental conditions influencing oil-absorbing power of the resin and oil-absorption dynamic are discussed.The maximum oil absorption rates of the high oil-absorption resin with good thermal resistance reach 43.6 and 37.1 g·g-1 for diesel oil and kerosene,and holding oil efficiency exceeds 95%.

Nanometer CuO petal-like film on copper sheet substrate was prepared through a simple controlled oxidation process.Then,the nanometer CuO film was modified by some low surface energy materials including 12-hydroxystearic acid,stearic acid,dodecyl mercaptan and linear low-density polyethylene,respectively.Some superhydrophobic composite films with static water contact angles of more than 150°,and roll angles of less than 5° were obtained.Among them,dodecyl mercaptan modification induced stronger superhydrophobicity than other low surface energy materials in short time(1 h) and its contact angle reached 165°.The formation mechanism of nanometer CuO was also discussed through crystal phase analysis.X-ray powder diffraction(XRD),contact angle measurements,surface-reflection IR spectra and scanning electron microscope(SEM) were respectively employed to characterize the structures of the composite film.The results showed that the superhydrophobic composite films with different morphologies were successfully prepared.