A preparation method for a transparent superhydrophobic coating on the surface of a hydrophilic core

A super-hydrophobic coating and hydrophilic technology, applied in the field of material science, can solve the problems of high cost, no consideration of scientific research interference of thick layer pouring liquid, serious environmental pollution, etc., and achieves low price, excellent protection performance, and preparation technology. simple effect

Inactive Publication Date: 2020-11-27
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country, the mixed solution prepared by resin glue, curing agent and accelerator is used to cast the core of Songke No. 2 well. This method is costly and seriously pollutes the environment, and does not consider the impact of the penetration of thick layer casting fluid in the core on later scientific research. research interference

Method used

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  • A preparation method for a transparent superhydrophobic coating on the surface of a hydrophilic core
  • A preparation method for a transparent superhydrophobic coating on the surface of a hydrophilic core
  • A preparation method for a transparent superhydrophobic coating on the surface of a hydrophilic core

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Embodiment 1

[0028] The invention provides a method for preparing an ultra-thin visible super-hydrophobic protective layer on the surface of a hydrophilic rock core, which prevents the weathering of the rock core and achieves a good protection effect. Specifically include the following steps:

[0029] 1) Core surface pretreatment: The main component is CaMg(CO 3 ) 2 Take the hydrophilic rock core as an example. After rinsing the surface of the core with clean water, air-dry it for later use. Configure a 1wt% cetyltrimethylammonium bromide solution at 40°C, and then evenly spray ten Hexaalkyltrimethylammonium bromide solution, let stand for 20s, repeat spraying 3 times, air dry, then rinse with water and air dry for use.

[0030] 2) Prepare modified silica solution: weigh 1g of sodium fluorosilicate and 0.2g of potassium silicate, add 90ml of deionized water and stir to dissolve, then add 0.3g of boric acid and stir for 1h, and finally add 0.1g of boric acid dissolved in 10ml of ethanol ...

Embodiment 2

[0037] 1) Core surface pretreatment: The main component is CaMg(CO 3 ) 2 Take the hydrophilic rock core as an example, clean the rock core with clean water, let it dry naturally, and prepare it as a 2wt% cetyltrimethylammonium bromide solution at 35°C, and then evenly spray ten Hexaalkyltrimethylammonium bromide solution, let it stand for 30s, repeat spraying 3 times, after natural air drying, rinse with water and air dry for use.

[0038] 2) Configure hydrophobic silica modified sol solution: weigh 0.6g sodium fluorosilicate and 0.5g potassium silicate, add 90ml deionized water and stir to dissolve, then add 0.1g boric acid and stir for 1 hour, finally add 10ml ethanol to dissolve 0.2 g of hydroxyl-terminated polydimethylsiloxane, stirred evenly to form a sol.

[0039] 3) Evenly spray hydrophobic silica-modified sol solution on the surface of the rock core treated with cetyltrimethylammonium bromide, let it stand for 30 seconds, repeat the spraying 6 times, leave it for 1 d...

Embodiment 3

[0041] 1) Core surface pretreatment: The main component is CaMg(CO 3 ) 2 Take the hydrophilic rock core as an example, clean the rock core with clean water, let it dry naturally, and prepare a 3wt% cetyltrimethylammonium bromide solution at 30°C, and then evenly spray ten Hexaalkyltrimethylammonium bromide solution, let it stand for 20s, repeat spraying twice, after natural air drying, rinse with water and air dry for use.

[0042] 2) Configure hydrophobic silica modified sol solution: weigh 0.8g sodium fluorosilicate and 0.3g potassium silicate, add 90ml deionized water and stir to dissolve, then add 0.2g boric acid and stir for 1 hour, finally add 10ml ethanol to dissolve 0.3 g of hydroxyl-terminated polydimethylsiloxane solution, stirred evenly to form a sol.

[0043] 3) Evenly spray hydrophobic silica-modified sol solution on the surface of the rock core treated with cetyltrimethylammonium bromide, let it stand for 20 seconds, and repeat the spraying 4 times. After 1 day o...

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Abstract

The invention discloses a preparation method of an ultrathin super-hydrophobic transparent coating for the surface of a hydrophilic rock core. The method comprises the following steps: firstly, pretreating the surface of the rock core by adopting a cationic surfactant, and then spraying a prepared negatively charged silicon dioxide modified sol solution on the surface of the pretreated rock core to generate a compact ultrathin super-hydrophobic transparent coating in situ. The cationic surfactant is sprayed on the surface of the rock core, the surface of the rock core is positively charged, then the silicon dioxide modified sol solution is sprayed on the surface of the rock core, and the negatively charged hydroxyl-rich modified sol solution uniformly and compactly grows on the surface ofthe rock core to form a silicon dioxide protection coating with certain bonding strength. The polydimethylsiloxane is grafted on the surface of the silicon dioxide film, and the hydrophobic methyl group faces the gas phase to form the ultra-thin super-hydrophobic transparent coating so as to avoid the secondary damage on the rock core, and thus the excellent protection performance, the excellent acid resistance and the excellent antibacterial performance are realized.

Description

technical field [0001] The invention relates to the technical field of material science, in particular to a method for preparing a transparent superhydrophobic coating used on the surface of a hydrophilic rock core. Background technique [0002] As a physical archive to record geological work results, rock core has important reuse value, non-reproducibility, and high replacement cost. However, after the core was mined underground, it changed from a storage environment with high temperature and pressure in the original geology to a storage environment in direct contact with the atmosphere at normal temperature and pressure. In the new storage environment, due to load release, temperature, humidity, ultraviolet Affected by complex factors such as light and atmospheric composition, it is inevitable that the air dispersion of cores will intensify, resulting in obvious changes in geological information such as lithology, structure, structure, and marking lines of cores, and the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/14C09D5/08C09D7/65
CPCC09D1/00C09D5/08C09D5/14C09D7/65
Inventor 杨丽霞陈烁袁俊霞贾志军陶心怡吴云涛陈森肖远强王君霞
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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