Silica gel-based composite drying agent and preparation method thereof

Abstract

The invention discloses a silica gel-based composite drying agent and a preparation method thereof, and belongs to the field of inorganic particle drying agents. The gum-based composite drying agent comprises a matrix and infiltration liquid, wherein the matrix comprises 90-120 parts of coarse-pore silica gel, 90-120 parts of mesoporous silica gel and 90-120 parts of fine-pore silica gel; and theinfiltration liquid is an alcoholic solution obtained by dissolving 25-55 parts by weight of calcium chloride, 10-25 parts by weight of lithium chloride and 10-25 parts by weight of sodium chloride into absolute ethyl alcohol. The drying agent is simple in composition, low in cost and good in moisture absorption effect, and is still solid after moisture absorption, so that the risk of hydrolysis is avoided; and the preparation method is simple, the silica gel rupture phenomenon generated in the preparation process is avoided, and damage to weaponry and ammunition is avoided while the moistureabsorption effect is good. The drying agent is good in regeneration effect, good in adsorbability and desorption capacity and capable of being rapidly regenerated, still can keep good hygroscopicity even after regeneration, can greatly reduce the cost, and has very good commercial value.

Description

technical field [0001] The invention relates to the field of inorganic particle desiccants, in particular to a silica gel-based composite desiccant and a preparation method thereof. Background technique [0002] During the storage process, equipment is easily affected by regions, seasons, climate and other environments, among which humidity is the most influential factor and the main reason for equipment corrosion, degradation, deterioration, damage and loss of function. When the relative humidity is high, a water film will be formed on the surface of the equipment, and the ions in the ring will dissolve in the water film to form an electrolyte, which will cause electrochemical corrosion on the surface of the metal components. In addition, high humidity will lead to increased moisture absorption of the propellant, resulting in accelerated hydrolysis, increased incombustibles, and reduced burning speed. When firing, it is easy to cause incomplete combustion in the chamber, ma...

AI Technical Summary

Problems solved by technology

[0003] However, the existing desiccants used for ammunition and weapons mainly have low moisture absorption and poor moisture absorption and drying effect.

However, the silica gel-based desiccant has a liquid solution phenomenon during use, and at the same time, a crack phenomenon occurs during the production process, causing the salt solution to flow out from the silica gel surface, which has an adverse effect on weapons and equipment.

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