| The nanometarials with namometer sizes in one, two or three dimensions have the unique physical, chemical and mechanical properities that are neither those of bulk materials. And they have been exploited for the extensive potential applications in opticals, electronics, magnetics, catalyst, biomedical, sensing, etc. Based on the former research on unique nano materials, we here prepared nano silver particle, polyaniline, Fe3O4 with different shape, also the applications was studied. In the first part, We synthesized nano-silver particles with one of such magical morphology, named silver-flower via a facial two-step polyol method, using AgNO3 as precursor, polyvinylpyrrolidone (PVP) as stabilizer, Sodium di(2-ethylhexyl) sulfosuccinate (AOT) is the main factor influencing its morphology. The morphologies of silver-flower at various reaction time can provide some insight into the mechanism of the reaction, Surface-enhanced Raman spectroscopy (SERS) and Surface Plasmon Enhanced Flourescence (SPEF) studies demonstrated its obvious enhancement on RhB.Polyaniline with nanostructures has elicited the most attention due to its excellent properties as conductive polymer. There’re many researches on the morphology of polyaniline, however, it’s conductivity are low, which is due to the need to make it into emeraldine by doping with proton acid. Polyaniline nanostructures with hollow cuboid, sheet and flower-like morphologies was synthesized through soft-template method, using sodium dodecyl sulfate(SDS), sodium methylallyl sulfonate (SMAS) and the mixture of SDS and SMAS as soft template and dopant, acetic acid as doping acid, and ammonium peroxodisulfate (APS) as oxidant. The structure of synthesized samples were characterized by Field-emission scanning electron microscopy(FESEM), UV-visible spectroscopy, Raman, etc. The results demonstrat that flower-like PANI has good conductivity and thermal stability.As anti-corrosive coating additive for metal protection, composite of Fe3O4 and PANI has elicited the most interest due to its good performance and promising application in many fileds, but the dispersion of Fe3O4 in PANI is still hard, in this paper, Fe3O4 sphere and strip were prepared by adjusting the proportion of FeCl3 and FeCl2 and attempt to solve this problem, the results is not effective. Thus Fe3O4/PANI was synthesized by oxidation-reduction methods, in this process aniline was initiated by Fe(OH)3, also Fe3O4 was generated. To test the anti-corrosive performance of resulting Fe3O4/PANI. With alkyd resin as matrix, the anti-corrosive coatings was prepared and then applied on tinplate. The influence of amount of Fe3O4/PANI on water resistance, alkali and acid resistance, salt spray resistance, Tafel curve, hardness were explored. The test results show that when the Fe3O4/PANI is added to 3%, the hardness was 6H, and the water absorption reduced to 4.1%, corrosion potential raised to-0.95v. After addition of Fe3O4/PANI, the coatings perform good acid and alkali resistance, and were endowed with excellent anti-corrosion property after 18d of immersion in 5% NaCl. |
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