阅读说明：本技术 一种石墨烯基玻璃脱模剂及其制备方法 (graphene-based glass release agent and preparation method thereof ) 是由 李璐 黄孟琼 屈晓兰 于 2019-09-28 设计创作，主要内容包括：本发明公开了一种石墨烯基玻璃脱模剂及其制备方法,所述脱模剂由以下重量份的组分组成：核壳结构的石墨-氧化石墨烯微球：10-30份；硅油：1-5份；聚乙二醇：1-5份；pH调节剂：0.5-2份；聚丙烯酸钠：1-5份；乙二胺四乙酸二钠：1-3份；去离子水20-50份。本发明所述石墨烯基玻璃脱模剂,能够有效降的防止玻璃制品在脱模过程中粘附在金属模具上,使玻璃制品表面光洁,同时此脱模剂拥有优越的成膜粘附力,在高温下仍能保持润滑,抗氧化的效果。(the invention discloses a graphene-based glass release agent and a preparation method thereof, wherein the release agent is composed of the following components in parts by weight: graphite-graphene oxide microspheres of core-shell structure: 10-30 parts; silicone oil: 1-5 parts; polyethylene glycol: 1-5 parts; pH regulator: 0.5-2 parts; sodium polyacrylate: 1-5 parts; disodium ethylene diamine tetraacetate: 1-3 parts; 20-50 parts of deionized water. The graphene-based glass release agent can effectively prevent a glass product from being adhered to a metal mold in the demolding process, so that the surface of the glass product is smooth, and meanwhile, the release agent has excellent film-forming adhesion and can still keep lubricating and antioxidant effects at high temperature.)

1. The graphene-based glass release agent is characterized by comprising the following components in parts by weight: graphite-graphene oxide microspheres of core-shell structure: 10-30 parts; silicone oil: 1-5 parts; polyethylene glycol: 1-5 parts; pH regulator: 0.5-2 parts; sodium polyacrylate: 1-5 parts; disodium ethylene diamine tetraacetate: 1-3 parts; 20-50 parts of deionized water.

2. The graphene-based glass release agent according to claim 1, wherein the preparation method of the graphite-graphene oxide microspheres with the core-shell structure comprises the steps of adding 10-30 parts of graphene oxide into 30-50 parts of deionized water, and performing ultrasonic dispersion for 30-200 min; and adding 5-20 parts of graphite microspheres into the formed product, stirring for 30-150min, and drying at 50-80 ℃ to obtain the graphite-graphene oxide microspheres with the core-shell structure.

3. The graphene-based glass release agent according to claims 1 and 2, wherein the particle size of the graphite-graphene oxide microspheres with the core-shell structure is 100nm-1500 nm.

4. The graphene-based glass release agent according to claim 2, wherein the graphene oxide has a sheet diameter of 10nm to 1000nm and a sheet thickness of 0.35 to 3 nm.

5. The graphene-based glass release agent according to claim 2, wherein the graphite microspheres have a particle size of 100nm to 1000 nm.

6. the graphene-based glass release agent according to claim 1, wherein the molecular weight of the polyethylene glycol is 500-2000.

7. The graphene-based glass release agent according to claim 1, wherein the graphene oxide-based glass release agent has a pH of 6 to 8.

8. the graphene-based glass release agent according to claim 1, wherein the pH regulator is one or more of citric acid, sorbic acid, sodium bicarbonate, or disodium hydrogen phosphate.

9. a preparation method of a graphene-based glass release agent is characterized by comprising the following steps:

1) Adding 1-5 parts of polyethylene glycol into 20-50 parts of deionized water, and fully stirring and dissolving to form a polyethylene glycol aqueous solution;

2) Adding 10-30 parts of graphite-graphene oxide microspheres with core-shell structures into the polyethylene glycol aqueous solution formed in the step 1);

3) Adding 0.5-2 parts of pH regulator into the product formed in the step 2), and regulating the pH value to 6-8;

4) And 4) sequentially adding 1-5 parts of silicone oil, 1-5 parts of sodium polyacrylate and 1-3 parts of disodium ethylene diamine tetraacetate into the product formed in the step 4), and continuously stirring for 10-100min to obtain the graphene-based glass release agent.

Technical Field

The invention belongs to the technical field of glass preparation, and particularly relates to a graphene-based glass release agent and a preparation method thereof.

background

in the preparation process of the glass product, a metal mold is needed to be used for molding the glass product, the softening temperature of glass is generally above 500 ℃, so the working temperature of the metal mold is generally 500-1200 ℃, and under the high-temperature condition, glass molten slurry is easily adhered to the surface of the metal mold, carbon is deposited on the surface of the glass product, cracks appear, and the surface smoothness of the glass product is influenced. Therefore, the mold release agent is periodically sprayed on the inner cavity of the metal mold to form a dry lubricating film, so that the mold release operation is easy, and the damage to the product caused by forced taking out can be avoided.

Disclosure of Invention

the invention aims to provide a graphene-based glass release agent which can effectively prevent a glass product from being adhered to a metal mold in a demolding process to enable the surface of the product to be smooth, has excellent film-forming adhesion, can still keep lubricating and antioxidant effects at high temperature, and has good moldability and ductility.

therefore, the invention adopts the following technical scheme:

The graphene-based glass release agent is prepared from the following components in parts by weight: graphite-graphene oxide microspheres of core-shell structure: 10-30 parts; silicone oil: 1-5 parts; polyethylene glycol: 1-5 parts; pH regulator: 0.5-2 parts; sodium polyacrylate: 1-5 parts; disodium ethylene diamine tetraacetate: 1-3 parts; 20-50 parts of deionized water.

The preparation method of the graphite-graphene oxide microsphere with the core-shell structure comprises the steps of adding 10-30 parts of graphene oxide into 30-50 parts of deionized water, and performing ultrasonic dispersion for 30-200 min; and adding 5-20 parts of graphite microspheres into the formed product, stirring for 30-150min, and drying at 50-80 ℃ to obtain the graphite-graphene oxide microspheres with the core-shell structure.

the particle size of the graphite-graphene oxide microsphere with the core-shell structure is 100nm-1500 nm.

Wherein the sheet diameter of the graphene oxide is 10nm-1000nm, and the thickness of the sheet layer is 0.35-3 nm.

wherein the particle size of the graphite microspheres is 100nm-1000 nm.

wherein the molecular weight of the polyethylene glycol is 500-2000.

Wherein the pH value of the graphene oxide-based glass release agent is 6-8.

Wherein the pH value regulator is one or more of citric acid, sorbic acid, sodium bicarbonate or disodium hydrogen phosphate.

The invention also provides a preparation method of the graphene-based glass release agent, which comprises the following steps:

1) Adding 1-5 parts of polyethylene glycol into 20-50 parts of deionized water, and fully stirring and dissolving to form a polyethylene glycol aqueous solution;

2) adding 10-30 parts of graphite-graphene oxide microspheres with core-shell structures into the polyethylene glycol aqueous solution formed in the step 1);

3) adding 0.5-2 parts of pH regulator into the product formed in the step 2), and regulating the pH value to 6-8;

4) and 4) sequentially adding 1-5 parts of silicone oil, 1-5 parts of sodium polyacrylate and 1-3 parts of disodium ethylene diamine tetraacetate into the product formed in the step 4), and continuously stirring for 10-100min to obtain the graphene-based glass release agent.

By adopting the technical scheme, the graphite-graphene oxide microspheres with the core-shell structure formed by coating the graphite microspheres with graphene oxide are used as the main raw material of the glass release agent, and have the advantages of water dispersibility, no toxicity, no pollution, good lubricating property, difficult agglomeration and the like. Meanwhile, the graphene oxide does not react with molten metal (such as aluminum, copper, steel and the like) or glass slurry, the graphene oxide can be reduced into graphene at the high temperature of the glass slurry, the graphene still has the special effects of lubrication, oxidation resistance, high temperature resistance and adhesion resistance, and the graphene after high-temperature reduction has good heat-conducting property, so that the glass can be molded more quickly and better.

Detailed Description

In order that the objects, features and advantages of the invention will be more clearly understood, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the description that follows, but which are intended to be encompassed by the invention in many different forms, all of which are deemed to be within the scope of the invention. Accordingly, the invention is not limited by the specific implementations disclosed below.