Fabrication And Surface Modification Of Mesoporous Silica Fibers By Electrospinning Via PVP

Electrospinning offers a simple and straightforward way for generating ultrafine fibers with diameter in the range of nanometers to micrometers from a variety of materials. It has been widely used in the fields of catalysis, adsorption, ion-exchange, and are finding new applications in optics, electronics, magnetism, medicine, etc. In recent years, researchers fabricated a variety of 1D (one-dimensional) nano composite materials by electrospinning combined with sol-gel method. Compared with other traditional synthesis method, electrospinning method as its many advantages to become the most simple way for fabricating one dimensional nanometer composite material. In this paper, we used the co-electrospinning method to fabricate the mesoporous silica nanofibers, and also did little application experiments. As follow:1. Fabricate the mesoporous silica nanofibers by electrospinning.Silica nanofibers were prepared by electrospinning of ethanol solution of the silica sol, PVP polymer and P123. The structure directing role of P123 was investigated by varying the amounts of P123 employed in the synthetic precursor. It was found that the P123 play a role as structure-directing agent to create mesopores with narrowed pore size distribution. The amount of P123 employed could influence the specific surface area of the silica nanofibers significantly, while no effect onto the pore size distribution.2. Modification of the mesoporous silica nanofiberswe reported a earlier fabricating of mesoporous silica nanofibers (MSFs) with non-wettable surfaces by electrospinning blend solutions of poly (vinyl pyrrolidone) (PVP) and silica gel, followed by calcination and 1-Octanol modification. By direct immoblilizing of alkyl chains onto the nanofibrous surface. The resultant MSFs showed good surface flexibility, and the obtained MSFs exhibited superior hydrophobicity.