Water-based micro-nano flaky graphite radon radiation shielding coating and preparation method and construction method thereof

A radiation shielding, flake graphite technology, applied in coatings, buildings, building structures, etc., can solve the problems of time-consuming and labor-intensive, graphene is easy to agglomerate, and construction period is long.

CN111826041AInactive Publication Date: 2020-10-27核工业二0三研究所
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-10-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a water-based micro-nano flaky graphite radon radiation shielding coating and a preparation method and a construction method thereof. The water-based micro-nano flaky graphiteradon radiation shielding coating is prepared from the following components in percentage by mass: 0.1-2% of water-based micro-nano flake graphite powder; 10-30% of quartz powder; 0-30% of ground calcium carbonate powder, 30-60% of acrylic emulsion, 5-15% of hydroxyethyl cellulose aqueous solution, 10-20% of water, 0.3-1% of dispersing agent, 0.1-0.5% of defoaming agent, 0.3-1.5% of coalescing agent, 0.1-0.5% of thickening agent and 0.1-0.3% of preservative. According to the invention, the defects of long drying time and low speed caused by a plurality of processes in on-site radon radiationshielding coating construction engineering are avoided; the coating can be used for various building structure base surfaces, particularly can be used for special-shaped structures such as cylinders,arc tops and bent corners, has the advantages of waste collection, emission reduction, water-based environmental protection and long service life, and has important application value for radon radiation treatment of constructional engineering.
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Description

technical field

[0001] The invention belongs to the field of radon radiation control of construction engineering, especially underground engineering, and relates to a water-based micro-nano flake graphite radon radiation shielding coating and a preparation method and a construction method thereof. Background technique

[0002] National defense, civil air defense, civil defense and other underground projects have the characteristics of airtight and airtight, humid ground environment, easy to grow mildew, and poor weather resistance due to their deep underground. The radon concentration released by soil and rocks is extremely high, which brings serious radon radiation. Pollution, the current methods of controlling radon pollution are: 1. Ventilation method, which is a traditional and current method, which cures the symptoms but not the root cause, the operation and maintenance costs are high, and the actual application effect is not good; 2. Air purifier method, a test in a nat...

Examples

preparation example Construction

[0046] The preparation method of this water-based micro-nano flake graphite powder is as follows:

[0047] 1) Add water, dispersant, film-forming aid, and coupling agent to the disperser in sequence according to the proportion, add hydroxyethyl cellulose aqueous solution and defoamer under stirring, stir and disperse until uniformly mixed; then add expanded graphite powder , stirring and mixing to obtain a water-based expanded graphite powder slurry;

[0048] 2) The water-based expanded graphite powder slurry is put into a refiner to grind into a uniform slurry, and the water-based micro-nano flake graphite powder slurry is dried and dehydrated to obtain a water-based micro-nano flake graphite material.

[0049] The method for preparing water-based micro-nano flake graphite radon radiation shielding coating comprises the following steps:

[0050] 1) Add water, dispersant, defoamer, and film-forming aid to the disperser sequentially according to the ratio and stir at high spee...

specific Embodiment 1

[0067] Embodiment 1 of the present invention comprises the following steps:

[0068] 1. Preparation method of water-based micro-nano flake graphite powder:

[0069] a, prepare expanded graphite powder:

[0070] Take the expandable graphite powder and heat it to 450°C for calcining until no water vapor emerges, and the expansion is completed, and the expanded graphite powder is obtained;

[0071] b. Preparation of water-based micro-nano flake graphite powder:

[0072] Ingredients: 8% expanded graphite powder, 15% hydroxyethyl cellulose aqueous solution, 1.5% coupling agent, 1% film-forming aid, 0.2% defoamer, 1% dispersant, and 73.3 The mass percentage of % water is composed of the raw materials of each component;

[0073] The hydroxyethyl cellulose aqueous solution is a hydroxyethyl cellulose aqueous solution with a mass percent content of hydroxyethyl cellulose of 2%; preparation method: add 1 weight part of hydroxyethyl cellulose to 49 parts by weight of water, add while ...

specific Embodiment 2

[0089] Embodiment 2 of the present invention comprises the following steps:

[0090] 1. Preparation method of water-based micro-nano flake graphite powder:

[0091] a, prepare expanded graphite powder:

[0092] Take the expandable graphite powder and heat it to 450°C for calcining until no water vapor emerges, and the expansion is completed, and the expanded graphite powder is obtained;

[0093] b. Preparation of water-based micro-nano flake graphite powder:

[0094] Ingredients: 8% expanded graphite powder, 15% hydroxyethyl cellulose aqueous solution, 1.5% coupling agent, 1% film-forming aid, 0.2% defoamer, 1% dispersant, and 73.3 The mass percentage of % water is composed of the raw materials of each component;

[0095] The hydroxyethyl cellulose aqueous solution is a hydroxyethyl cellulose aqueous solution with a mass percent content of hydroxyethyl cellulose of 2%; preparation method: add 1 weight part of hydroxyethyl cellulose to 49 parts by weight of water, add while ...