Method for preparing high-temperature resistant anti-corrosion ablation microfiber

Abstract

The invention discloses a method for preparing high-temperature resistant anti-corrosion ablation microfiber, and belongs to the technical field of high-temperature filtration and ablation material preparation. The method comprises the following steps: 1, performing thermal acid leaching, namely, artificially crushing alkali-free glass fiber cotton of which the single fiber diameter is less than 1 [mu] m, soaking into a 2.5 mol/L acid solution, and stirring in two directions at a speed of 30-300 rpm; 2, performing water washing percolation, namely, firstly, washing a great amount of an acid liquid, adsorbed in the fiber cotton, with cold water, further washing with hot water and cold water respectively, testing acid residues on the surface of the fiber cotton by using extensive pH indicator paper of which the pH value is 1-14, and till the pH value is greater than 5, stopping washing; and 3, performing thermal treatment, drying the fiber cotton washed with water, and determining whether sintering is implemented or not according to application situations. The high-temperature resistant anti-corrosion ablation microfiber is high in high temperature resistance, high in corrosion resistance, rich in porous texture, excellent in separation and filtration effect, high in technical level, high in ablation property, low in cost and relatively good in prospect in market application.

Description

technical field [0001] The invention relates to the technical field of high-temperature filtration and preparation of ablation materials, in particular to a preparation method of high-temperature-resistant and corrosion-resistant ablative microfibers. Background technique [0002] The temperature resistance of ordinary inorganic fiber filter materials is relatively low. The working environment of the filter cloth for dust removal made of medium-alkali-free glass fiber is below 200 °C, the acid and alkali erosion resistance is poor, and the service life is extremely long in the corrosive gas environment. It is short, and only plays the role of dust filtration, and does not work for the separation of gases of different molecular sizes. In the high-temperature field, the effective filtration and separation of gases requires the emergence of high-temperature-resistant filter materials. Traditional high-temperature filter materials use ceramic membranes or honeycomb ceramics, wh...

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Problems solved by technology

[0004] Internationally, research on high-silica cotton is dominated by the United States. The main research is cotton-like materials with a single fiber diameter of about 3 microns. The silica content is stable and the temperature resistance is good, but the micropores in the fiber are almost all Closed, only rely on the gap between fi

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