阅读说明：本技术 相变内墙漆复合材料 (Phase-change interior wall paint composite material ) 是由 陈雅姿 于 2018-07-13 设计创作，主要内容包括：本发明提供了一种相变内墙漆复合材料,所述内墙漆复合材料包括乳胶漆和微胶囊,且以所述内墙漆复合材料的总重量为100％计,所述微胶囊的重量百分含量为5％-30％。本发明提供的相变内墙漆复合材料,将乳胶漆和微胶囊复合使用,所述乳胶漆作为漆面涂料,同时充当用于固定微胶囊的粘结剂,形成内墙面涂层。由此形成的相变内墙漆复合材料中,当微胶囊当温度达到相变温度时,在胶囊内产生相变过程,相变材料将外界热量转为自身潜热或释放到外界环境中,使体系保持处于恒温状态,从而可以减少室内温度波动,在夏天和夏天能使室内保持舒适的温度,使室内保持良好的热舒适度,有助于节省能源。(The invention provides a phase-change interior wall paint composite material which comprises emulsion paint and microcapsules, wherein the microcapsules account for 5-30 wt% of the total weight of the interior wall paint composite material as 100%. The phase-change interior wall paint composite material provided by the invention compositely uses the latex paint and the microcapsules, and the latex paint is used as a paint surface coating and also serves as a binder for fixing the microcapsules to form an interior wall coating. In the phase-change interior wall paint composite material formed by the method, when the temperature of the microcapsule reaches the phase-change temperature, a phase-change process is generated in the microcapsule, and the phase-change material converts external heat into self latent heat or releases the latent heat to the external environment, so that the system is kept in a constant temperature state, the fluctuation of the indoor temperature can be reduced, the indoor temperature can be kept comfortable in summer and summer, the indoor temperature can be kept good, and the energy can be saved.)

1. The phase-change interior wall paint composite material is characterized by comprising emulsion paint and microcapsules, wherein the microcapsules account for 5-30% of the total weight of the interior wall paint composite material as 100%.

2. The phase-change interior wall paint composite material as claimed in claim 1, wherein the microcapsule is a spherical microcapsule and comprises a core material and a wall material coated on the surface of the core material, wherein the core material is composed of octadecane microspheres, and the wall material is urea-formaldehyde resin.

3. The phase change interior wall paint composite material according to claim 2, wherein the mass ratio of the core material to the wall material is 65:35 to 75: 25.

4. The phase change interior wall paint composite of claim 2, wherein the urea-formaldehyde resin has a molar ratio of urea to formaldehyde of (1.2-2.0): 1.

5. the phase change interior wall paint composite of claim 4, wherein the urea-formaldehyde resin has a molar ratio of urea to formaldehyde of 2: 1.

6. the phase change interior wall paint composite of any one of claims 1 to 5, wherein the shell material has a thickness of 10 to 100 nm.

7. The phase change interior wall paint composite of any one of claims 1 to 5 wherein the latex paint has a solids content of 60 to 65%.

Technical Field

The invention belongs to the technical field of interior wall paint, and particularly relates to a phase-change interior wall paint composite material.

Background

The inner wall emulsion paint is a kind of water paint which is prepared by using polymer emulsion as a film forming material and using synthetic resin emulsion as a base material and adding pigment, filler and various auxiliary agents. The inner wall latex paint is one of the main decorative materials for indoor wall surfaces and ceilings, has the advantages of good decorative effect, convenient construction, small environmental pollution and low cost, and is widely applied. With the enhancement of environmental awareness and the improvement of living standard, materials in the construction industry gradually become intelligent and multifunctional.

The climate of cold winter and hot summer brings discomfort to the life of people. Various solutions have been sought in order to reduce the discomfort associated with the climate. At present, the most common scheme is that an air conditioner is installed in a room, and the room temperature environment reaches the level suitable for the living of people by adjusting the room temperature. However, the general use of the air conditioner not only improves the energy consumption, but also releases a large amount of heat and discharges fluorine-containing substances, which is not beneficial to sustainable development. Therefore, it is very important to find other methods for regulating the indoor temperature.

Disclosure of Invention

The invention aims to provide a phase-change interior wall paint composite material, and aims to solve the problem that the prior art does not have a technology for controlling the temperature of an interior wall paint by controlling the components of the interior wall paint.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a phase-change interior wall paint composite material which comprises emulsion paint and microcapsules, wherein the microcapsules account for 5-30 wt% of the total weight of the interior wall paint composite material as 100%.

Preferably, the microcapsule is a spherical microcapsule and comprises a core material and a wall material coated on the surface of the core material, wherein the core material consists of octadecane microspheres, and the wall material is urea-formaldehyde resin.

Preferably, the mass ratio of the core material to the wall material is 65:35 to 75: 25.

Preferably, in the urea-formaldehyde resin, the molar ratio of urea to formaldehyde is (1.2-2.0): 1.

preferably, in the urea-formaldehyde resin, the molar ratio of urea to formaldehyde is 2: 1.

preferably, the thickness of the shell material is 10-100 nm.

Preferably, the solid content of the latex paint is 60-65%.

The phase-change interior wall paint composite material provided by the invention compositely uses the latex paint and the microcapsules, and the latex paint is used as a paint surface coating and also serves as a binder for fixing the microcapsules to form an interior wall coating. In the phase-change interior wall paint composite material formed by the method, when the temperature of the microcapsule reaches the phase-change temperature, a phase-change process is generated in the microcapsule, and the phase-change material converts external heat into self latent heat or releases the latent heat to the external environment, so that the system is kept in a constant temperature state, the fluctuation of the indoor temperature can be reduced, the indoor temperature can be kept comfortable in summer and summer, the indoor temperature can be kept good, and the energy can be saved. In addition, the phase-change interior wall paint composite material formed by compounding the emulsion paint and the microcapsule has the advantages of high heat transfer efficiency, excellent energy storage performance, stable performance and environmental protection.

Drawings

FIG. 1 is a comparison graph of DSC curves showing the same ratio of materials to wall materials (core-wall ratio) and different mass ratios of microcapsules to latex paint.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The embodiment of the invention provides a phase-change interior wall paint composite material which comprises emulsion paint and microcapsules, wherein the microcapsules account for 5-30 wt% of the total weight of the interior wall paint composite material as 100%.

The phase-change interior wall paint composite material provided by the embodiment of the invention compositely uses the latex paint and the microcapsules, and the latex paint is used as a paint surface coating and also serves as a binder for fixing the microcapsules to form an interior wall coating. In the phase-change interior wall paint composite material formed by the method, when the temperature of the microcapsule reaches the phase-change temperature, a phase-change process is generated in the microcapsule, and the phase-change material converts external heat into self latent heat or releases the latent heat to the external environment, so that the system is kept in a constant temperature state, the fluctuation of the indoor temperature can be reduced, the indoor temperature can be kept comfortable in summer and summer, the indoor temperature can be kept good, and the energy can be saved. In addition, the phase-change interior wall paint composite material formed by compounding the emulsion paint and the microcapsule has the advantages of high heat transfer efficiency, excellent energy storage performance, stable performance and environmental protection.

In the embodiment of the invention, the microcapsule is a phase change microcapsule, and the phase change microcapsule is a spherical phase change microcapsule and comprises a core material and a wall material coated on the surface of the core material. Specifically, the core material is composed of octadecane microspheres. Compared with solid paraffin and liquid paraffin, the octadecane microspheres are used as core materials, the phase change temperature of the octadecane microspheres is close to room temperature, energy can be effectively stored at room temperature, and meanwhile, the octadecane microspheres have high phase change latent heat. When the phase-change microcapsule is used as a core material of the phase-change microcapsule, the heat storage performance of the phase-change microcapsule can be fully exerted, and the temperature can be effectively regulated and controlled.

The wall material of the phase-change microcapsule is urea-formaldehyde resin. The urea-formaldehyde resin has better strength and toughness, and can bear external pressure and volume change of a core material during phase change; and the compactness is good, so that the leakage of the core material is prevented, and the service life of the microcapsule is ensured. In addition, the solubility of the urea formaldehyde resin is different from that of the core material octadecane, so that the problem that part of the core material seeps out of the dissolved wall material in the repeated thermal cycle process and the energy storage efficiency is reduced can be avoided, and the stability of the core material can be better ensured; meanwhile, the influence on the thermal property and the bearing capacity of the emulsion paint material caused by the compatibility problem of the phase-change microcapsule and the emulsion paint solvent can be avoided.

More preferably, in the urea-formaldehyde resin, the molar ratio of urea to formaldehyde is (1.2-2.0): 1. in the urea-formaldehyde resin, the mole ratio of urea and formaldehyde has a larger influence on the performance of the microcapsule. When the formaldehyde content is relatively high, the mechanical strength of the microcapsule wall is improved, and the capsule wall structure becomes compact. However, when the formaldehyde content is too high, a large amount of unreacted methylol groups are generated to cure the microcapsules, and the shrinkage becomes large. When the formaldehyde content is insufficient, the water resistance of the wall material is lowered. The embodiment of the invention starts with the mole ratio of 1.2:1 of urea to formaldehyde, and is beneficial to improving the strength of the microcapsule wall resin. On the basis of ensuring various performances of the urea-formaldehyde resin, particularly preferably, the molar ratio of urea to formaldehyde in the urea-formaldehyde resin is 2: 1.

according to the embodiment of the invention, the phase-change microcapsule obtained by taking the octadecane microspheres as the core material and the urea-formaldehyde resin as the wall material has good heat storage performance, and the phase-change interior wall paint composite material obtained by compounding the phase-change microcapsule with the emulsion paint has good heat storage performance and long service life.

On the basis of the above embodiments, it is further preferable that the mass ratio of the core material to the wall material is 65:35 to 75:25, and at this time, the microcapsule has a good thermal cycle performance. When the content ratio of the core material is too large, the number of the octadecane microspheres in the system is large, and the total surface area is large, so that the coating performance of the octadecane microspheres by relatively less urea-formaldehyde resin is reduced, and the core material is easy to leak. When the content ratio of the wall material is large, the number of microspheres in the system is small, the total surface area is small, a large amount of flocculent precipitates are formed outside the microcapsules by the urea-formaldehyde resin, the wall thickness of the microcapsules is increased, and the microcapsules are not favorable for serving as core materials of phase-change materials to exert heat storage performance. Preferably, the thickness of the shell material is 10-100nm, so that the heat transfer performance is improved, and the specific surface area and the heat conductivity coefficient are increased.

In the examples of the present invention, the latex paint used in combination with the microcapsules is not particularly limited, and may be a latex paint commonly used in the art. Preferably, the latex paint has a solids content of 60-65%, which not only facilitates uniform dispersion with the microcapsules, but also facilitates the firm binding of the microcapsules in the resulting paint finish.

The phase change microcapsule is compounded with the emulsion paint, specifically, the phase change microcapsule is uniformly dispersed and firmly fixed in a formed paint film, when the indoor temperature is higher, the phase change microcapsule starts to work, outdoor heat absorbed by a common wall body is stored outside the wall body through phase change energy storage, meanwhile, the temperature outside the enclosure structure is kept at a lower temperature, and the heat transmitted into the room from the outside through the enclosure structure is reduced; when the outdoor temperature is lower than the phase-change temperature, the heat concentrated in the phase-change microcapsules (outside the building envelope) can be released through effective outdoor ventilation. Therefore, the temperature peak value of the outer surface of the common wall body is reduced and delayed, the heat transmitted into the room through the wall body is obviously reduced, and the refrigeration energy consumption is reduced.

The following description will be given with reference to specific examples.