CN-121991529-A - Nanometer drag reduction material and preparation method and application thereof

CN121991529ACN 121991529 ACN121991529 ACN 121991529ACN-121991529-A

Abstract

The invention belongs to the technical field of coal mine safety, and particularly relates to a nano drag reduction material, a preparation method and application thereof. The preparation method comprises the steps of dispersing nano particles in an organic solvent to form a dispersion liquid, adding a silane coupling agent and a modifying auxiliary agent into the dispersion liquid to carry out surface modification reaction, and centrifugally washing, drying and grinding after the reaction is finished to obtain the surface modified nano drag reduction material. The invention solves the problem that nano silicon dioxide and other particles are easy to agglomerate in an organic medium through the surface modification of dimethyl dichlorosilane, and has simple and controllable process, mild condition, concise steps, good repeatability and easy realization of stable production and quality control. In the coal seam water injection application of the coal mine, the risk of dust and gas disasters can be reduced in a source and high efficiency, the health and production safety of miners are ensured, the erosion and abrasion to pumps, valves and pipelines are reduced, the maintenance cost is reduced, the social benefit is huge, and the application is wide.

Inventors

WU YONGPING
WANG HUIFENG
XU ZHIQIANG
LI YONGYUAN
LI RUILONG
SUN FULONG
WANG GANG
HAN ZONGXIANG

Assignees

华能庆阳煤电有限责任公司核桃峪煤矿
华能煤炭技术研究有限公司
山东科技大学

Dates

Publication Date: 20260508
Application Date: 20251230

Claims (10)

1. The preparation method of the nano drag reduction material is characterized by comprising the following steps: (1) Dispersing the nano particles in an organic solvent to form a dispersion liquid; (2) Adding a silane coupling agent and a modifying auxiliary agent into the dispersion liquid, wherein the silane coupling agent is used as a modifying agent to carry out surface modification reaction; (3) After the reaction is finished, centrifugally washing, drying and grinding to obtain the surface modified nano drag reduction material.
2. The method for preparing the nano drag reduction material according to claim 1, wherein the nano particles comprise at least one of metal oxide nano particles, non-metal oxide nano particles and carbon-based nano materials, the organic solvent comprises at least one of alcohols, ketones, esters and hydrocarbon solvents, the silane coupling agent is at least one of alkyl chlorosilane and alkyl alkoxy silane, and the modifying auxiliary agent is a substance capable of promoting hydrolysis of the silane coupling agent or reaction with hydroxyl groups on the surfaces of the nano particles.
3. The method for producing a nano drag reducing material according to claim 2, wherein the nano particles are at least one of silica, titania and alumina; The organic solvent is at least one of ethanol, isopropanol and n-butanol; The silane coupling agent is at least one of dimethyl dichlorosilane, dimethyl dimethoxy silane and hexamethyldisilazane; the modifying auxiliary agent is deionized water or ammonia water.
4. The method for preparing nano drag reduction material according to claim 1, wherein in the step (1), after the nanoparticles are completely dried, adding an organic solvent, standing for 10min, heating and stirring during dispersion, and heating at 100-120 ℃.
5. The method for preparing the nano drag reduction material according to claim 1, wherein the stirring is ultrasonic stirring, the stirring speed is not more than 100 revolutions per minute, the stirring time is 10-15 min, and the nano drag reduction material is prepared into a nano particle suspension solution with the mass fraction of nano particles being 3-6%.
6. The method for preparing the nano drag reduction material according to claim 1, wherein in the step (2), a modifier and a modifying auxiliary agent are added in the stirring process, wherein the modifier is added with the mass fraction of 12-20%, and the modifying auxiliary agent is added with the mass fraction of 3-5%.
7. The method for preparing the nano drag reduction material according to claim 6, wherein the temperature is raised to 130-150 ℃ after the modifier and the modifying auxiliary agent are added, and the reaction is finished after the reflux is carried out for 40-50 min.
8. The method for preparing the nano drag reduction material according to claim 1, wherein in the step (4), absolute ethyl alcohol is used for centrifugal washing for 2-3 times, and the nano drag reduction material is dried and ground at a constant temperature of 80-100 ℃ and then is placed in a vacuum dryer for sealing and storage.
9. The nano drag reducing material prepared by the preparation method of the nano drag reducing material of any one of claims 1-8, wherein the particle size range of the nano drag reducing material is 10-100 nm.
10. The use of a nano drag reducing material as defined in claim 9 in coal seam production, oil and gas field production, crude oil pipeline transportation, marine drag reduction.

Description

Nanometer drag reduction material and preparation method and application thereof Technical Field The invention belongs to the technical field of coal mine safety, and particularly relates to a nano drag reduction material, a preparation method and application thereof. Background With the depletion of shallow resources, the deep coal seam is gradually developed, the permeability of the coal seam is poor, and the danger is high. Meanwhile, due to the fact that the coal mine mechanization degree is continuously improved, dust content in an operation area is always in a higher level in the coal mining process, and effective wetting operation is difficult to achieve by a traditional coal mining method. Along with the continuous development of nano technology, the preparation of nano fluid for improving the coal seam water injection efficiency has a very good application prospect. Nanoparticles are novel materials which have one dimension on the nanometer scale and have different properties from the traditional solid, and generally have smaller particle size, large specific surface area and high biocompatibility. Nanofluids refer to suspensions of nanoparticles stably dispersed in a solvent medium, and fluids exhibit novel characteristics, such as low surface tension, high thermal conductivity, high adsorption potential, etc., due to the introduction of nanoparticles. Therefore, the nano-fluid drag reduction and injection enhancement technology is generated. The nano silicon dioxide is widely applied to the fields of rubber, plastic, paper making, printing ink, ceramic, paint, pigment and the like, but the surface of the nano silicon dioxide is hydrophilic due to the existence of light groups on the surface of the nano silicon dioxide, so that the nano silicon dioxide is difficult to uniformly disperse in an organic medium and has poor binding force with an organic matrix, thereby limiting the application of the nano silicon dioxide. Therefore, in order to solve the problem of compatibility of the nano silicon dioxide and the organic medium, the surface of the nano silicon dioxide is required to be modified, the water injection effect of the coal seam is improved, the water injection efficiency of the coal seam is improved, and an important technical support is provided for efficient exploitation of coal mine resources. Disclosure of Invention The invention aims to provide a nano drag reduction material, a preparation method and application thereof. The problems of dispersion and compatibility of nano silicon dioxide in coal seam water injection are solved by modifying the surface, the water injection flow is remarkably improved, the wetting effect is obvious, and the water injection effect is improved. The technical scheme adopted is as follows: the preparation method of the nano drag reduction material comprises the following steps: (1) Dispersing the nano particles in an organic solvent to form a dispersion liquid; (2) Adding a silane coupling agent and a modifying auxiliary agent into the dispersion liquid, wherein the silane coupling agent is used as a modifying agent to carry out surface modification reaction; (3) After the reaction is finished, centrifugally washing, drying and grinding to obtain the surface modified nano drag reduction material. Preferably, the nano particles comprise at least one of metal oxide nano particles, nonmetal oxide nano particles and carbon-based nano materials, the organic solvent comprises at least one of alcohols, ketones, esters and hydrocarbon solvents, the silane coupling agent is at least one of alkyl chlorosilane and alkyl alkoxy silane, and the modifying auxiliary agent is a substance capable of promoting hydrolysis of the silane coupling agent or reaction with hydroxyl groups on the surface of the nano particles. Preferably, the nano particles are at least one of silicon dioxide, titanium dioxide and aluminum oxide, and as a further preference, the nano particles are silicon dioxide; The organic solvent is at least one of ethanol, isopropanol and n-butanol; the silane coupling agent is at least one of dimethyl dichlorosilane, dimethyl dimethoxy silane and hexamethyldisilazane, and as a further preferable mode, the silane coupling agent is dimethyl dichlorosilane; The modifying auxiliary agent is deionized water or ammonia water, and as a further preferable mode, the modifying auxiliary agent is deionized water. Preferably, in the step (1), after the nanoparticles are completely dried, an organic solvent is added, and the mixture is left to stand for 10 minutes, and the mixture is heated and stirred during dispersion, wherein the heating temperature is 100-120 ℃. Preferably, the stirring is ultrasonic stirring, the stirring speed is not more than 100 revolutions per minute (slow stirring), the stirring time is 10-15 min, and the nanoparticle suspension solution with the mass fraction of the nanoparticles of 3-6% is prepared. As a further preferred, the mass fraction of