Study On Fabrication Of Functional Surface Materials With Different Wettability And Properties Via Photopolymerization

The wettability is a critical property of material surface. The materials with different wettability have attracted much public attention since it related to the normal production and living. The lotus leaf, is one of the most famous materials with special wettability. Due to the superhydrophobic property, this special “skill” prevents implant from variety of risk of biocontamination, and helps itself with ability of self-cleaning.Thus, it is eager to design and fabrication of surface materials with special wettability. Meanwhile, photopolymerization is one the most useful technique to produce functional materials because of efficiency and environmentally friendly. Combined with the reaction characteristics of photopolymerization, it provides us a whole new strategy to design and build novel functional surface materials.In this thesis, we described a series of methods to fabricate functional materials with different wettability. In the first part of this thesis, we utilized double-bonded silica nanoparticles to fabricate superhydrophobic surface which have hierarchical and porous structure. The contact angle results indicate that this kind of silica nanoparticle based surface material has a large static water contact angle. The potential application and development prospective were demonstrated by the low cost of materials and ease of fabrication.Secondly, in the process of fabrication of superhydrophobic coating,due to the size and chemical structure of modified Nano-particles, the prepared superhydrophobic coating has less stability, which limits the application of materials. Therefore, we introduce the fluorine-containing monomer with extremely low surface energy in the polymerization system,while retaining the double-bonded silica particles as the key component to increase the surface roughness of the polymer film, and successfully prepared the physical-chemical stable surface materials. We found that the prepared material had excellent ability to grow against cell adhesion, which laid the experimental basis for the addition of the patterned material to the selective adhesion growth of cells.Thirdly, we have prepared a fluorine-containing patterned roughness polymer material with presence of solvent. It is reasonable to assume that the patterned material surface has a different wettability on different region by predicting the basis of previous studies. For further experimenting, we found that the cell of mouse has a high selective adherence growth behavior on this patterned surface.Finally, we used photopolymerization technique to prepare a functional polymer-modified glass surface. When the ambient temperature is lower than its minimum critical temperature (LCST), due to the surface hydrophobicity transition and the change of molecular chain structure,bacteria was killed and then released from our material’s surface, indicated it is an excellent "smart" antibacterial material.