The Preparation And Research Of Functional Coating By Photopolymerization

The common coatings can resist to scratches and other basic functions, but these coatings cannot meet the current needs of the people. More needs were the function of antibacterial, self-cleaning coatings.In this paper, photopolymerization is used to prepare a series of functional coatings. The main work is as follows:(1) Poly(dimethylaminoethyl acrylate) (PDMAEA) stripes and Poly(dimethylaminoethyl acrylate-acetic acid) (PDMAEA-Acetic Acid) stripes with solvent stimuli-responsive properties were prepared to resist the bacterial adsorption. PDMAEA and PDMAEA-Acetic Acid stripes with different spacing were fabricated by photopolymerization. Solvent stimuli-responsive properties of PDMAEA were confirmed by swelling test under some solvents like water, ethanol or acetone. The morphology of the PDMAEA and PDMAEA-Acetic Acid stripes with certain spacing was observed by Optical microscope and Atomic force microscopy, which could be changed from straight micro-lines to long-range ordered swollen micro-waves under ethanol. The antibacterial activity of PDMAEA and PDMAEA-Acetic Acid reached 95.9% against E.coli. The antifouling experiment results indicated that the PDMAEA and PDMAEA- Acetic Acid stripes with solvent stimuli-responsive properties showed much better antifouling properties than the plane coating.(2) Hydrophilic poly(dimethylaminoethyl acrylate) (PDMAEA) stripes were fabricated on glass surface by photopolymerization with the use of photomask. The patterned glass was then dipped in 3,3,4,4,5,5,6,6,7,7,8,8,8-Tridecafluorooctyl acrylate (G06C):the hydrophobic monomer climbed along the PDMAEA stripes through capillary effect to form gradient wettability surface and was fixed on PDMAEA stripes by secondary photopolymerization. Atomic force microscope (AFM) results showed that G06C could climb along the PDMAEA stripes because of its low surface energy. Contact angle (CA) measurements results showed that wettability gradient properties could be controlled by soak time. X-ray photoelectron spectroscopy (XPS) indicated a gradually change on the content of surface element. The spacing between the stripes had an influence on the wettability gradient.(3) Polytridecafluorooctyl acrylate (PG06C) superhydrophobic coating was fabricated on glass surface by photopolymerization and the phase separation. G06C was mixed with low polar solvents and alcohols, which was fixed on glass by photopolymerization. Contact angle (CA) measurements and Scanning electron microscope (SEM) results showed that superhydrophobic properties could be controlled by the volume of solvent. Atomic force microscope (AFM) results showed that the second photopolymerization and solvent treatment had an influence on the superhydrophobicity.