Filler modifying method and application thereof

Abstract

The invention discloses a filler modifying method and application thereof. The method comprises the following steps that (A) powdery fillers are uniformly unfolded and laid on the porous material surface; the powdery fillers are selected from carbon materials, metal materials, conductive polymers, and coating materials, nitrides, oxides, sulfide, hydrotalcite and silicate thereof; (B) a polymer orpolymer solution is added into an evaporation container; the polymer is selected from self heated polymers capable of being decomposed into free radicals, and polymers capable of being evaporated orsublimated after being heated or can be evaporated along with solvents; (C) on the basis of chemical vapor deposition, an vacuum evaporation method or a vacuum spray method, the materials in the evaporation container are heated; film formation molecules escape or extremely fine steam mist is formed; the formed steam is incident to the filter surface to form an ultrathin insulation thin film; the modified filter is obtained. The method has the advantages of high flexibility, simple process, low cost, uniform medication effect, stable filter performance and the like, and has wide application prospects in the fields of heat conduction composite materials and anti-corrosive paint.

Description

technical field [0001] The invention relates to a method for modifying fillers, which belongs to the technical field of particle surface modification. Background technique [0002] The surface modification treatment technology of fillers is a hot research field gradually developed with the rise of new composite materials. Although the development history is relatively short, the surface modification of fillers plays an important role in improving the dispersion of fillers and their compatibility with matrix materials. application is of great importance. Therefore, by controlling or changing the properties of the filler surface, it has an important effect on the preparation and application of composite materials. [0003] There are many surface modification treatments for fillers, mainly including liquid phase treatment, dry modification treatment, gas phase treatment, mechanochemical treatment, high energy radiation treatment, etc. Among them, the liquid-phase method modi...

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Problems solved by technology

Among them, the liquid-phase method modification process has a complicated modification process and high cost; although the dry method modification process has the advantages of flexibility, simple process, and low cost, it is difficult to modify the filler during the modification process. Achieve uniform treatment; gas-phase modification treatment process is characterized by the modifier dispersed in the gas phase can be evenly adsorbed on the surface of the filler, the filler modification effect is stable, compared with liquid-phase treatment equipment, the modified powder does not need Drying treatment, but traditional gas phase treatment equipment is difficult to modify the surface of sub-micron or nano-scale fillers; for mechanochemical treatment process, due to the continuous pulverization of fillers during the modification process, new surfaces are generated, and the filler surface It is difficult to completely adsorb the modifier; the quality of the modified filler prepared by the high-energy radiation modification process is unstable, the production efficiency is low, and the cost is high