A kind of preparation method of superhydrophobic sand

A super-hydrophobic and sand-based technology, which is applied to the surface coating device, coating, special surface, etc., can solve the problems of insufficient resources of super-hydrophobic materials, high production costs, poor heat resistance, etc., and achieve good water storage , high mechanical strength and long service life

Active Publication Date: 2019-10-11
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of abundant and easy-to-obtain material and simple and convenient, the method that can prepare superhydrophobic sand in a large area, has realized the transformation of hydrophilic sand to superhydrophobic, solves the resource shortage of superhydrophobic material, high production cost, Problems such as poor heat resistance and single base material

Method used

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  • A kind of preparation method of superhydrophobic sand
  • A kind of preparation method of superhydrophobic sand
  • A kind of preparation method of superhydrophobic sand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Sand pretreatment: wash a certain amount of sand with 100mL deionized water for 3 times, and then dry it for use.

[0028] (2) Preparation of surface-coated silica sand: Add 5g of washed sand to 100mL of ethanol solvent, then add 50mL of cetyltrimethylammonium bromide with a concentration of 0.14M, and stir for 1 hour. The pH of the solution was adjusted to 13 with aqueous ammonia. Then, in the process of stirring, 10 mL of ethyl orthosilicate was added dropwise into the above solution, and the reaction was fully carried out for 12 hours. Then leave it to stand, remove the white dispersion liquid on the sand upper layer, fully wash the lower layer sand 3 times with deionized water, and obtain the sand that the surface is coated with silicon dioxide after drying (such as figure 1 shown).

[0029] (3) Low surface energy modification: Add the sand coated with silica on the surface prepared in step B to 100 mL of a 0.5% perfluorodecyltriethoxysilane ethanol mixed solu...

Embodiment 2

[0033] (1) Sand pretreatment: wash a certain amount of sand with 100mL deionized water for 3 times, and then dry it for use.

[0034] (2) Preparation of surface-coated silica sand: add 10g of washed sand to 100mL of ethanol solvent, then add 50mL of cetyltrimethylammonium bromide with a concentration of 0.14M, stir well for 1h, The pH of the solution was adjusted to 13 with aqueous ammonia. Then, in the process of stirring, 15 mL of ethyl orthosilicate was added dropwise into the above solution, and the reaction was fully carried out for 12 hours. Then let it stand, remove the white dispersion liquid on the upper layer of the sand, fully wash the sand in the lower layer 3 times with deionized water, and obtain the sand coated with silicon dioxide on the surface after drying.

[0035] (3) Low surface energy modification: Add the sand coated with silica on the surface prepared in step B to 100 mL of a 0.5% perfluorodecyltriethoxysilane ethanol mixed solution, stir, and wait for...

Embodiment 3

[0037] (1) Sand pretreatment: wash a certain amount of sand with 100mL deionized water for 3 times, and then dry it for use.

[0038] (2 Preparation of surface-coated silica sand: add 10g of washed sand to 100mL of ethanol solvent, then add 50mL of cetyltrimethylammonium bromide with a concentration of 0.14M, stir thoroughly for 1 hour, and use Ammonia water adjusts the pH value of the solution to 12. Then, in the process of stirring, add 10mL tetraethyl orthosilicate dropwise to the above solution, and fully react for 10h. Then let stand, remove the white dispersion on the sand, and use The lower layer of sand is fully washed with ionized water for 3 times, and the sand coated with silicon dioxide is obtained after drying.

[0039] (3) Low surface energy modification: Add the sand coated with silica on the surface prepared in step B to 100 mL of a 0.5% perfluorodecyltriethoxysilane ethanol mixed solution, stir, and wait for 6 hours to react Later, the modified sand is obtain...

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Abstract

The invention belongs to the technical field of superhydrophobic material preparation, and particularly relates to a method for converting hydrophilic sand into super-hydrophobic sand. The method mainly comprises the following steps: carrying out the structured processing and the low surface energy substance modification of sand surfaces. The water contact angle of the prepared super-hydrophobic sand is greater than 150 degrees, and water can freely roll on the surface of the sand without permeating. In addition, the super-hydrophobic sand exhibits extremely good thermostability, and still has good hydrophobicity at a temperature of 400DEG C. Meanwhile, the super-hydrophobic sand can be used for realizing the storage and the transportation of water, and has a good drag reduction effect. The preparation method disclosed by the invention has the advantages of simple technology, abundant raw materials, no toxin, environment protection, low cost and high thermostability, is suitable for large-area preparation and application, can be applied to the surface of a building to realize a super-hydrophobic wall, and also can be applied to the storage and the transportation of desert water so as to realize the irrigation and transportation engineering of the water in a desert.

Description

technical field [0001] The invention belongs to the technical field of preparation of super-hydrophobic materials, in particular to a method for converting hydrophilic sand into high-temperature-resistant super-hydrophobic sand. Background technique [0002] Since 1997, the phenomenon of superhydrophobic surface interface was revealed for the first time, the research on bionic superhydrophobic materials has experienced nearly 20 years of development, and has shown important application value in many fields, especially in waterproof, self-cleaning, anti-icing and Oil-water separation and other fields. At the same time, researchers have been looking for new cheap and easily available materials and applications. In particular, how to realize the combination of superhydrophobic materials with the environment and resource utilization is considered to be a promising research topic. However, breakthrough progress has not been obtained. [0003] As we all know, while sand is a ri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B14/06C04B20/10B01J2/30C04B103/65
Inventor 郭志光陈立伟
Owner HUBEI UNIV
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