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Metal organic framework supported corrosion inhibitor as well as preparation method and application thereof

A metal-organic framework and metal-organic technology, applied in the field of building functional materials, can solve the problems of the long-term effect of the loaded rust inhibitor, the lack of corrosion resistance in the later stage, and the excess corrosion resistance in the early stage, etc., so as to improve the resistance to ion transmission performance effect

Active Publication Date: 2022-03-15
NANJING BOTE BUILDING MATERIALS CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem in the above-mentioned prior art that "the long-term effect of the existing load-type rust inhibitor is difficult to guarantee and practical application", the inventors of the present invention actively research and innovate on the basis of long-term research, and provide A brand-new load-type rust inhibitor, which uses a metal-organic framework as a carrier, can effectively solve the situation that the rust inhibitor is consumed too much in the early stage, resulting in excess corrosion resistance in the early stage and insufficient corrosion resistance in the later stage

Method used

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  • Metal organic framework supported corrosion inhibitor as well as preparation method and application thereof
  • Metal organic framework supported corrosion inhibitor as well as preparation method and application thereof
  • Metal organic framework supported corrosion inhibitor as well as preparation method and application thereof

Examples

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preparation example Construction

[0035] The preparation method of the above-mentioned metal-organic framework-supported rust inhibitor provided by the present invention comprises the following steps:

[0036] In step S1, metal ion sources, organic compounds, dispersants and nanomaterials are dispersed in an organic solvent, and a solvothermal reaction is carried out at 80° C. to 300° C. and 1 to 30 atmospheres for at least 5 hours to obtain a metal organic framework.

[0037] Specifically, the organic compound is an organic compound that can perform a chelation reaction with the metal ion in the metal ion source; preferably has an O-containing heteroatom group and / or an N-containing heteroatom group and / or an S-containing heteroatom group Any one of dibasic carboxylic acid, tribasic carboxylic acid, diamine compound, polyethylene polyamine, dibasic sulfonic acid, and tribasic sulfonic acid of the atomic group. That is, the basic structure of these organic compounds is any one of dicarboxylic acid, tricarboxyl...

Embodiment 1

[0046] First, calcium oxalate, succinic acid, polycarboxylic acid dispersant (molecular weight 20,000) and nano-silicon with a particle size of 10nm are added to dimethylacetamide, under the pressure and temperature conditions of 3MPa and 140°C, The solvation reaction was carried out for 10 h to obtain the metal organic framework.

[0047] Then, sodium monofluorophosphate is added to the obtained metal organic framework, and the stirring is continued for 3 hours, and the solvent is extracted under vacuum negative pressure to prepare a nanoscale metal organic framework-supported rust inhibitor.

[0048] That is to say, the metal-organic framework-supported rust inhibitor provided in this example includes a metal-organic framework with calcium succinate chelate as the framework material and doped with nano-silicon, and a single metal organic framework filled in the metal-organic framework. Sodium Fluorophosphate.

Embodiment 2

[0050] First, aluminum carbonate, pentamethylene diamine, polyphosphoric acid dispersant (molecular weight 40000) and nano-Al with a particle size of 50nm 2 o 3 , was added to ethanol, under the pressure and temperature conditions of 10MPa and 100°C, the solvation reaction was carried out for 6h to obtain the metal organic framework.

[0051] Then, calcium nitrite is added to the obtained metal organic framework, and the stirring is continued for 2 hours, and the solvent is extracted under vacuum negative pressure, so as to prepare a nanoscale metal organic framework supported rust inhibitor.

[0052] That is to say, the metal-organic framework-supported rust inhibitor provided in this embodiment includes the framework material of aluminum diamine chelate, and is doped with nano-Al 2 o 3 metal-organic framework and calcium nitrite filled inside the metal-organic framework.

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Abstract

The invention belongs to the technical field of building functional materials, and particularly relates to a metal organic framework supported corrosion inhibitor and a preparation method thereof. According to the metal organic framework loaded type corrosion inhibitor, a core-shell structure of a steel bar corrosion inhibitor loaded in a metal organic framework is constructed, the porous or adsorption performance of the metal organic framework is utilized, and efficient corrosion inhibitor components are loaded, so that the hydration process of the internal steel bar corrosion inhibitor and cement is reduced in the cementing material mixing process of the loaded type corrosion inhibitor, and the cementing material mixing efficiency is improved. Therefore, the influence of the steel bar corrosion inhibitor on the cement hydration process is reduced, and then the working and mechanical properties of a hydraulic cementing material are influenced; the loaded steel bar corrosion inhibitor component can be gradually and slowly released through the through holes in the surface of the metal organic framework after the hydraulic material is hardened, so that the long-acting and efficient corrosion inhibition effect is achieved, and the ion transmission resistance of concrete is improved. The load type corrosion inhibitor can be applied to concrete in a direct doping mode, and the long-acting and efficient corrosion inhibition effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of building functional materials, and in particular relates to a metal-organic framework-loaded rust inhibitor and its preparation method and application. Background technique [0002] Corrosion damage of reinforced concrete is more and more serious, which will cause major safety accidents. With the rapid development of economy and society and the continuous expansion of engineering application fields, harsh corrosion environments will become more and more common, and it is urgent to provide long-term effective anti-rust technical measures for steel bars and anti-corrosion concrete. [0003] The usual methods to control the corrosion of steel bars include: corrosion-resistant steel bars, cathodic protection, coated (plated) steel bars, concrete surface coating, and steel bar rust inhibitors, etc. Among them, the addition of steel bar rust inhibitors to concrete has significant effects, simple construction an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C08G83/00C04B103/61C04B24/12C04B22/08C04B22/16
CPCC04B40/0046C04B24/40C08G83/008C04B2103/61C04B22/02C04B22/16C04B22/06C04B22/085C04B22/064C04B24/122
Inventor 蔡景顺刘加平穆松刘建忠周霄骋马麒洪锦祥
Owner NANJING BOTE BUILDING MATERIALS CO LTD