Preparation method of waterproof high-tenacity porous silicon dioxide

Abstract

The invention discloses a preparation method of waterproof high-tenacity porous silicon dioxide, and belongs to the technical field of preparation of inorganic nano materials. When a template is dipped into dispersion liquid which is prepared from titanium dioxide, ammonium dihydrogen phosphate, calcium chloride dihydrate and sodium carbonate, the dispersion liquid does not only plays the role ofpromoting hydrolysis, so that the contact area between porous silicon dioxide and a titanium-based material is larger and larger, and accordingly the strength and the tenacity of porous silicon dioxide are improved advantageously. The protection agent of the waterproof pipe duct is modified phenolic resin, molybdenite stone powder and liquid paraffin are added into the protection agent, the molybdenite stone contains a large amount of sulphur elements, a sulphur-containing compound can enable the liquid paraffin and the phenolic resin to achieve a cross-linking effect, so that the compactnessof the surface protective layer of the paraffin layer of the pore duct protection agent is improved, silicon dioxide and phenolic resin can be subjected to dehydration condensation through the amine functionalization of the porous SiO2 material, and bonded to be an integral part, meanwhile, a bonded hydrogen bond in the porous SiO2 material can improve the bonding force between the pore duct protection agent and silicon dioxide, and the application prospect is wide.

Description

technical field [0001] The invention discloses a preparation method of waterproof and high toughness porous silica, belonging to the technical field of preparation of inorganic nanometer materials. Background technique [0002] Porous silica particles, as particles with a core-shell structure and a particle size up to nano-scale, include a solid spherical core part and a porous shell part. Because of its large specific surface area, good adsorption, strong chemical activity, and good biocompatibility, it has been used in many different fields. These fields mainly include chemical mechanical polishing, chemical catalysis, drug controlled release, sensors and so on. At present, porous silica particles are mainly enriched with a large number of silanol groups on the surface, which are easy to undergo condensation reaction with silane coupling agents containing organic groups. Through this method, various organic groups are introduced into the particles for modification. Its a...

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is that the existing porous silica has high hygroscopicity, the adsorbed water will change the structure of the oxide or the periodic structure of the pores will be decomposed, the pore