Titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature

Abstract

The invention relates to a method for performing plasma modification treatment on the surface of titania nano powder under the condition of atmospheric pressure and normal temperature. The method comprises the following steps: the titania nano powder is placed on special transmission equipment of plasma treatment equipment; plasma is directly sprayed to the surface of the titania nano powder under the condition of the atmospheric pressure and open environment; and the titania nano powder moves in the plasma atmosphere, and surface modification of the titania nano powder is performed, wherein the power of plasma treatment of the titania nano powder is between 10 watts and 5,000 watts, and the time is between 0.01 and 6,000 seconds. The method can directly improve the surface property, the structure and the shape of the titania nano powder at one step under the condition of the atmospheric pressure and normal temperature, and has strong technological controllability and simple conversion technology, and the dry-method processing technology has low environmental pollution; and the surface of titania nano particles has the effect of magnetic attraction of two like magnetic poles, so that the possibility of reducing agglomeration of the nano particles is reduced.

Description

technical field [0001] The invention belongs to the field of preparation of titanium dioxide nanometer powder materials, in particular to a method for modifying the surface of titanium dioxide nanometer powder with plasma at atmospheric pressure and normal temperature. Background technique [0002] Normal temperature, atmospheric pressure plasma chemical vapor deposition, ion implantation, sputtering, plasma spraying, chemical polymerization, anodic oxidation and other technologies have been widely used in aerospace, electronics, machinery and other fields. In recent years, this new surface treatment technology has played an increasingly important role in nano-engineering technology. [0003] Normal temperature and normal pressure plasma refers to partially or fully ionized gas, including electrons, ions, and high-energy active components such as free radicals and photons. Normal temperature and normal pressure plasma has the advantages of high energy, high speed and high a...

AI Technical Summary

Problems solved by technology

Although the synthesis equipment of the liquid phase method is simple, the process is time-consuming and cumbersome, the pollution is large, and the batch operation is very easy to cause hard agglomeration or sintering of the nanoparticles during the high-temperature roasting process. The introduction of surfactants and other additives will reduce the purity of the product.

[0005] At present, in the literature at home and abroad, there is no research report on improving the surface properties of nano-titanium dioxide powder by using atmospheric pressure and room temperature plasma modification.

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