利用蜡烛灰制备超疏水疏油抗菌涂层

Antibacterial Superhydrophobic-oleophobic Coating Fabricated by Candle Soot

利用蜡烛灰制备了超疏水疏油涂层,并证明其具有优异的抗菌性能.蜡烛灰的多孔网状的纳米结构放大了低表面能全氟辛基硅烷(TMEDA)的润湿性,达到了超疏水疏油的目的.

Superhydrophobic-oleophobic coating with excellent antibacterial property was fabricated by chemical vapor deposition( CVD) on the surfaces of candle soot with silicon dioxide( SiO2) and trichloro( 1 H,1 H,2 H,2 H-perfluorooctyl) silane( TMEDA). Morphological analysis by scanning electron microscope( SEM) showed that the candle soot possessed porous network nanostructure. The wetting property results by water contact angle characterization showed SiO2 deposited coating exhibiting superhydrophilic-lipophilic property which can be attributed to synergistic action of porous network nanostructure and Si O2. When further deposited by TMEDA on the surfaces of SiO2 deposited coating,not only the porous network nanostructure of coating was leaved behind,but also the superhydrophilic-lipophilic property of coating was transformed into superhydrophobic-oleophobic property. Such prepared superhydrophobic-oleophobic coating possesses higher antibacterial property by weakening the adsorption of bacteria on the solid surface. The synergistic action of superhydrophobic-oleophobic property and porous network structure leads to the excellent antifouling property of superhydrophobic-oleophobic coating. The superhydrophobic-oleophobic coating made up of candle soot may provide one new simple and effective approach for antibacteria in industrial unit and public environment.