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Preparation method of intelligent corrosion inhibition microcapsule

A technology of microcapsules and corrosion inhibition, applied in the directions of microcapsule preparation, microsphere preparation, coating, etc., can solve the problems of failure to achieve corrosion inhibition, release and leakage, etc., to avoid release and leakage, and the method is simple and feasible. Effect

Inactive Publication Date: 2017-04-26
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] However, the direct addition of corrosion inhibitors to the coating system will lead to unnecessary release and leakage, thus failing to achieve the expected corrosion inhibition effect

Method used

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  • Preparation method of intelligent corrosion inhibition microcapsule
  • Preparation method of intelligent corrosion inhibition microcapsule
  • Preparation method of intelligent corrosion inhibition microcapsule

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Effect test

Embodiment 1

[0019] (1) 2-Mercaptobenzothiazole is used as the corrosion inhibitor to be loaded. Mix the corrosion inhibitor solution with the natural halloysite nanotube carrier at a ratio of 125:1, and carry out vacuum loading with ultrasonication for 10 minutes. The vacuum loading pressure is -0.1 MPa, the loading cycle is 4 and each loading cycle includes 30min of vacuum loading and 5min of normal pressure stirring treatment. The loaded sample is washed with ethanol solution, which is prepared by mixing absolute ethanol and distilled water in a ratio of 1:4, and the number of cleanings is 3. After cleaning, the sample can be centrifuged and dried.

[0020] (2) configure polydiene dimethyl ammonium chloride concentration to be 4mgmL -1 Aqueous solution and sodium polystyrene sulfonate in 3.5wt% NaCl 4mgmL -1 solution.

[0021] (3) Mix the loaded microcontainer carrier with the polydiene dimethyl ammonium chloride solution, then stir and ultrasonically treat, seal for 5 minutes, and ce...

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Abstract

The invention provides a preparation method of an intelligent corrosion inhibition microcapsule. The method includes the following steps that a vacuum negative pressure method is adopted to load a selected corrosion inhibitor into a nano-carrier, and a capsule core of the microcapsule is obtained; poly(diallyldimethylammonium chloride) and poly(sodium styrenesulfonate) are adopted as raw materials to prepare a capsule wall; the capsule core is added into the wall material solution, the evenly-mixed sample is sealed for 5-10 min and then is centrifuged and dried, and the intelligent corrosion inhibition microcapsule with a core-shell structure is obtained. The method is simple and feasible; the maximum loading capacity of the obtained microcapsule to the corrosion inhibitor can reach 3%-4% by mass; the microcapsule obtained after encapsulation is stable in structure, and the purpose of slow release can be achieved; besides, water can be adopted as a triggering agent for releasing the corrosion inhibitor from the carrier, and thus a good foundation is provided for applying the microcapsule to in-service coating systems.

Description

technical field [0001] The invention relates to the research field of sustained-release release of corrosion inhibitors, and mainly relates to a preparation method of intelligent corrosion-inhibiting microcapsules. Background technique [0002] Organic coatings have been widely used due to their advantages such as easy construction, cost-effectiveness and so on. However, holes or micro-cracks inevitably exist in the traditional coating system. Once these defects exist, the corrosive medium can easily penetrate and cause the coating to bubble, crack and peel off. In addition, once the coating film is mechanically damaged, it is easily damaged and forms a large cathode and a small anode with the metal substrate, thereby accelerating the corrosion of the metal substrate. Based on the above background, we hope to dope the corrosion inhibitor in the coating system, so that the coating system can release the corrosion inhibitor under the conditions of the above two kinds of damag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C09D7/12
CPCB01J13/02C09D7/63
Inventor 李瑛崔苗苗马元泰刘莉
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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