Fabrication And Study Of Organosilicon Surface With Special Wettability

Surfaces with special wettability have attracted much attention because of their promising applications in industry and our daily life. A series of progress has been made in many fields of special wettability such as superhydrophobic surfaces, superamphiphobic surfaces and surfaces with intellective switch between superhydrophobicity and superhydrophilicity. Manipulating chemical composition and surface roughness, micron/nano-scale surfaces were developed by a simple phase separation method in this dissertation. By the control of several experimental parameters, the well control of structure and interfacial properties in the system was realized, making the basis of functional surface's further application. Main contents are as follows.1. The organosilane micro/nanostructured surfaces were prepared on the glass substrate via a phase separation approach. Surfaces whose geometry and wettability was tunable were obtained correspondingly by adjusting the water content of reaction system and the chain length of alkyl in monomers. With the increase of water content, the morphology of MTS-derived surface evolved from nano-protuberances to discrete nanofibres and finally to nanospheres. Further influences on wettability are conducted, and corresponding CA variations are obvious. With the change of chain length, the activity of the monomer and the polymerizations are influenced by the volume effect of the group of monomers. So the regulation of surface's wetting property was realized.2. Herein, we create a surface that is superamphiphobic in air and superoleophilic surfaces unwater by combining the surface structure and surface chemical composition, which was inspired by the behavior of desert beetle's collecting drinking water in the fog. We expand the traditional gas/liquid/solid three-phase interfacial system into the liquid/liquid/solid three-phase system and committed to the development of the interface materials collecting oil droplets under water. We have successfully created FTS-derived surfaces with 3D network structure intertwined by nanofibers and microbumps. The surfaces can be used in capturing and collecting oil droplets in water. This study will open up a new milestone to the dispose of oily wastewater, which is certainly significant for future industrial applications.