The Effect Of Modification On The Structure Of Halloysite Nanotubes And Adsorption Desulfurization

In 2006, the United States, Natural Nano company firstly reported halloysite nanotubes showed excellent properties in the field of rubber, causing a flood of this materials research. Further researches show that the nanotubes materials not only show the good performance in the field of rubber, but also in adsorption, storage, transport, catalytic and composite materials, gas separation, etc show excellent characteristics.In addition, many studies have shown that the nanotubes to a great extent, has a certain similarity with carbon nanotubes, and the nanotubes relative to the carbon nanotubes have higher storage capacity, thus become the most potential alternative carbon nanotubes nanomaterials.Organic modification is an effective method of promotion channel materials performance.Research shows that after organic modification of halloysite nanotubes in adsorption of heavy metal ions in water and other contaminants showed excellent properties, but for the organic modification of halloysite nanotubes the effect of pore structure and adsorption desulfurization performance study is less. Therefore, firstly, this article through direct grafting method got phenyl phosphate modification of halloysite nanotubes, and then the effect of nanometer tube structure on the adsorption was investigated. Second, by grafting after synthesis method for surface modification of amino and carboxyl halloysite nanotubes, different groups of halloysite nanotube surface acidity and the influence of adsorption desulfurization performance was investigated;Finally, through grafting synthetic method and coating method got series of modified halloysite nanotubes, examines the organic modification of halloysite nanotubes the influence of pore structure and adsorption desulfurization performance.Research shows that different grafting surface groups on the surface have a certain influence on acidity of halloysite nanotubes. The dium-strong acid of halloysite nanotubes in surface is conducibe to the adsorption desulfurization. In addition this paper adopt organic grafting modification and coating modification to change the pore structure of halloysite nanotubes, exploring the pore structure on the influence of adsorption desulfurization. Results show that through organic grafting modification, halloysite nanotube outer surface and tube cavity form spatial reticulated structure, increasing the halloysite nanotubes entrance, conducive to the adsorption desulfurization. Coated modification made halloysite nanotubes pipe plugging, inner hole, is not conducive to the adsorption desulfurization.