阅读说明：本技术 一种自限温发热涂层材料的制备方法 (Preparation method of self-temperature-limiting heating coating material ) 是由 吴慎将 周文炳 周政 王馨梅 周迪 邱锦芬 于 2020-05-23 设计创作，主要内容包括：本发明公开了一种自限温发热涂层材料,包括如下重量份的组分：石墨烯10-20份、分散剂20-50份、中性盐10-30份、树脂10-50份、导电石墨2-4份、硼酸锌1-3份、阻燃填料1-3份、自限温PTC填料5-15份、增塑剂1-3份和消泡剂3-5份。本发明属于自限温发热涂层制备技术领域,具体是提供一种利用高于水的沸点的调节剂并通过加入中性盐来提高沸点,进而降低发热涂层材料的蓄热温度,保证发热涂层材料固化后的蓄热温度低于所加入的沸点调节剂的沸点,从而起到自限温作用的自限温发热涂层材料的制备方法。(The invention discloses a self-temperature-limiting heating coating material which comprises the following components in parts by weight: 10-20 parts of graphene, 20-50 parts of dispersing agent, 10-30 parts of neutral salt, 10-50 parts of resin, 2-4 parts of conductive graphite, 1-3 parts of zinc borate, 1-3 parts of flame-retardant filler, 5-15 parts of self-temperature-limiting PTC filler, 1-3 parts of plasticizer and 3-5 parts of defoaming agent. The invention belongs to the technical field of preparation of self-temperature-limiting heating coatings, and particularly provides a preparation method of a self-temperature-limiting heating coating material, which utilizes a regulator with a boiling point higher than that of water and adds neutral salt to improve the boiling point, so as to reduce the heat storage temperature of the heating coating material and ensure that the heat storage temperature of the heating coating material after curing is lower than the boiling point of the added boiling point regulator, thereby playing a self-temperature-limiting role.)

1. The self-temperature-limiting heating coating material is characterized by comprising the following components in parts by weight: 10-20 parts of graphene, 20-50 parts of dispersing agent, 10-30 parts of neutral salt, 10-50 parts of resin, 2-4 parts of conductive graphite, 1-3 parts of zinc borate, 1-3 parts of flame-retardant filler, 5-15 parts of self-temperature-limiting PTC filler, 1-3 parts of plasticizer and 3-5 parts of defoaming agent.

2. The self-temperature-limiting heating coating material as claimed in claim 1, which is characterized by comprising the following components in parts by weight: 15 parts of graphene, 35 parts of a dispersing agent, 20 parts of neutral salt, 30 parts of resin, 3 parts of conductive graphite, 2 parts of zinc borate, 2 parts of a flame-retardant filler, 10 parts of a self-temperature-limiting PTC filler, 2 parts of a plasticizer and 4 parts of a defoaming agent.

3. The self-temperature-limiting heating coating material as claimed in claim 1, wherein: the resin is any one or a combination of more of cellulose resin, polyester resin, acrylic resin, phenolic resin, polyamide resin, EVA resin and PVC resin.

4. The self-temperature-limiting heating coating material as claimed in claim 1, wherein: the neutral salt is a mixture of sodium chloride, potassium chloride and magnesium chloride in a mass ratio of 1:1: 2.

5. The self-temperature-limiting heating coating material as claimed in claim 1, wherein: the dispersing agent is a mixture of any one or more of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, polyvinyl alcohol and methyl cellulose mixed in any proportion.

6. The self-temperature-limiting heating coating material as claimed in claim 1, wherein: the self-temperature-limiting PTC filler comprises any one of barium carbonate-based ceramic PTC, titanium boride-based PTC and polymer resin-based PTC.

7. The self-temperature-limiting heating coating material as claimed in claim 1, wherein: the plasticizer is any one or a combination of two of dibutyl phthalate and dioctyl phthalate.

8. The self-temperature-limiting heating coating material as claimed in claim 1, wherein: the defoaming agent is any one or a combination of more of silicone oil, tributyl phosphate and mineral oil.

9. A preparation method of a high-temperature-resistant protective coating material is characterized by comprising the following steps:

(1) weighing the components according to the weight parts of the components;

(2) uniformly stirring graphene, conductive graphite, zinc borate, a flame-retardant filler and a self-temperature-limiting PTC filler, grinding the mixture for 0.5 to 1 hour by using a ball mill, uniformly mixing, and sieving by using a 100-plus-200-mesh sieve;

(3) preparing a clean container, mixing neutral salt and distilled water in a mass ratio of 1:3 in the container to obtain a neutral salt solution, heating the container and the internal neutral salt solution to 40-60 ℃, then sequentially adding graphene, a dispersing agent, resin, conductive graphite, zinc borate, a flame-retardant filler, a self-temperature-limiting PTC filler, a plasticizer and a defoaming agent into the neutral salt solution, and mechanically stirring for 1-2 hours to obtain a uniform dispersion liquid;

(4) and (4) sieving the stirred uniform dispersion liquid obtained in the step (3), and removing the uniform dispersion liquid with a sieve of more than 200 meshes to obtain the self-temperature-limiting heating coating material.

Technical Field

The invention belongs to the technical field of preparation of self-temperature-limiting heating coatings, and particularly relates to a preparation method of a self-temperature-limiting heating coating material.

Background

The electric heating is popularized and used to replace coal heating, and the pollutant discharge can be reduced. The electric heating floor is a composite floor which can generate heat after being electrified and is made by processing and compounding special electric heating slurry and metal current carrying strips on an insulating wood base material. When the electric heating device works, the electric heating coating is used as a heating body, heat is sent into a space in a radiation mode, a human body and an object are firstly warmed, and the comprehensive effect of the electric heating device is superior to that of a traditional convection heating mode. The electric heating system is composed of a power supply, a temperature controller, a wear-resistant layer, a decorative layer, a base material layer, a graphene-based conductive heating layer, a protective layer, a heat-preservation reflecting layer and the like. The power supply is communicated with the conductive heating layer through a lead to convert electric energy into heat energy. Because the conductive heating layer is a pure resistance circuit, the conversion efficiency is high, and most of the conductive heating layer (98%) is converted into heat energy except a small loss (2%). Compared with the traditional coal heating mode, the system has the advantages of health, environmental protection, energy conservation, high efficiency and the like, can provide personalized heating selection, is expected to solve pollution sources fundamentally, and is imperative.

Graphene is a new carbon material formed by a honeycomb single-layer carbon atom layer, has excellent electrical properties (electron mobility is larger than 2 multiplied by 105cm2/V s), outstanding heat conduction performance (5000W/mK), ultra-high specific surface area (2630m2/g), and has the advantages of lightness, good flexibility, large-area use, difficult oxidation and the like, has more outstanding far infrared radiation performance than other electrothermal materials, and the prepared heating element has the characteristics of high sensible temperature and good thermal comfort, so the heating element has the characteristics and potential of becoming an excellent electrothermal material.

The heating coating has the function and the effect of generating heat, but need cooperate temperature control element to carry out temperature regulation and control usually when using to avoid producing high temperature and cause the injury or cause unnecessary waste to the user, prior art is using graphite alkene as the regulation and control of the electric heating thick liquids composition of main materials and function and reach the research and development of self limit for temperature function and disclose less.

Disclosure of Invention

In order to solve the existing problems, the invention provides a preparation method of a self-temperature-limiting heating coating material, which utilizes a regulator with the boiling point higher than that of water and adds neutral salt to improve the boiling point, so as to reduce the heat storage temperature of the heating coating material and ensure that the heat storage temperature of the heating coating material after being cured is lower than the boiling point of the added boiling point regulator, thereby playing a role of self-temperature limitation.

The technical scheme adopted by the invention is as follows: a self-temperature-limiting heating coating material comprises the following components in parts by weight: 10-20 parts of graphene, 20-50 parts of dispersing agent, 10-30 parts of neutral salt, 10-50 parts of resin, 2-4 parts of conductive graphite, 1-3 parts of zinc borate, 1-3 parts of flame-retardant filler, 5-15 parts of self-temperature-limiting PTC filler, 1-3 parts of plasticizer and 3-5 parts of defoaming agent.

Preferably, the self-temperature-limiting heating coating material comprises the following components in parts by weight: 15 parts of graphene, 35 parts of a dispersing agent, 20 parts of neutral salt, 30 parts of resin, 3 parts of conductive graphite, 2 parts of zinc borate, 2 parts of a flame-retardant filler, 10 parts of a self-temperature-limiting PTC filler, 2 parts of a plasticizer and 4 parts of a defoaming agent.

Further, the resin is a composition of any one or more of cellulose resin, polyester resin, acrylic resin, phenolic resin, polyamide resin, EVA resin and PVC resin.

Further, the neutral salt is a mixture of sodium chloride, potassium chloride and magnesium chloride in a mass ratio of 1:1: 2.

Further, the dispersing agent is a mixture of any one or more of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, polyvinyl alcohol and methyl cellulose mixed in any proportion.

Further, the self-temperature-limiting PTC filler comprises any one of a barium carbonate-based ceramic PTC, a titanium boride-based PTC, and a polymer resin-based PTC.

Further, the plasticizer is any one or a combination of two of dibutyl phthalate and dioctyl phthalate.

Further, the defoaming agent is a composition of any one or more of silicone oil, tributyl phosphate and mineral oil.

A preparation method of a self-temperature-limiting heating coating material comprises the following steps:

(1) weighing the components according to the weight parts of the components;

(2) uniformly stirring graphene, conductive graphite, zinc borate, a flame-retardant filler and a self-temperature-limiting PTC filler, grinding the mixture for 0.5 to 1 hour by using a ball mill, uniformly mixing, and sieving by using a 100-plus-200-mesh sieve;

(3) preparing a clean container, mixing neutral salt and distilled water in a mass ratio of 1:3 in the container to obtain a neutral salt solution, heating the container and the internal neutral salt solution to 40-60 ℃, then sequentially adding graphene, a dispersing agent, resin, conductive graphite, zinc borate, a flame-retardant filler, a self-temperature-limiting PTC filler, a plasticizer and a defoaming agent into the neutral salt solution, and mechanically stirring for 1-2 hours to obtain a uniform dispersion liquid;

(4) and (4) sieving the stirred uniform dispersion liquid obtained in the step (3), and removing the uniform dispersion liquid with a sieve of more than 200 meshes to obtain the self-temperature-limiting heating coating material.

By adopting the scheme, the invention has the following beneficial effects: the invention relates to a self-temperature-limiting heating coating material, which is a preparation method of the self-temperature-limiting heating coating material, wherein a regulator higher than the boiling point of water is mainly added to improve the boiling point of water, and the boiling point regulator can be gasified and absorb heat at a temperature higher than the boiling point of water (100 ℃) during grouting, so that a self-temperature-limiting additive with unit mass is gasified and absorbs more latent heat of gasification, the heat storage temperature of the grouting material is further reduced, and the heat storage temperature after the slurry is solidified is ensured to be lower than the boiling point of the added boiling point regulator, thereby playing a role in self-temperature limitation; the purpose of adding the dispersing agent is to enable the self-temperature-limiting PTC filler to be better dispersed in the material and better absorb the heat emitted by the solidification of the slurry; by adding the PTC self-temperature-limiting filler in the electric heating slurry ingredients and by the characteristic that the specific resistance coefficient of the PTC self-temperature-limiting filler is increased along with the temperature rise, the electric heating slurry has the characteristics of automatically limiting the temperature and controlling the power under the conditions of no temperature control sensor and no control program, and the safety of the conductive heating layer can be greatly improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.