Nanoporous ceramic membrane and preparation method thereof

摘要

A nanoporous ceramic membrane and preparation method thereof is provided. The nanoporous ceramic membrane is prepared by halloysite nanotubes (HNTs), and its porosity is between 35% to 85%. This method comprises steps as following: HNTs and polymers with a certain ratio are dispersed in organic solvent, and HNTs/polymer composite fibers are prepared through electrospinning method; after the HNTs/polymers composite fibers are laminated, they are sintered at high temperature in a certain or vacuum atmosphere, and a nanoporous ceramic membrane is obtained. Ceramic membrane prepared by this method is corrosion resistant, thermal resistant, and have large specific surface area, it may widely applied in the field of filtration, catalyst carrier and purification of high-temperature gas, etc.

主权项

1. A preparation method of a ceramic membrane, wherein said preparation method comprises:
dispersing halloysite nanotubes in organic solvents, wherein polymers are added therein and stirred until a uniform solution is prepared, whereby a spinning solution used for electrospinning is obtained; wherein a weight ratio of said organic solvent to said polymers is between 4:1-9:1; a weight ratio of the halloysite nanotubes to polymer is equal to or less than 1; wherein an electrospining method is applied to obtain composite fibers by using said spinning solution, whereby a polymer and halloysite nanotubes membrane is prepared; wherein said membrane formed from composite fibers is sintered to remove polymers to obtain the nanoporous ceramic membrane.