阅读说明：本技术 一种新风能量回收膜及其制备方法 (Fresh air energy recovery film and preparation method thereof ) 是由 熊长平 钟读准 于 2021-08-04 设计创作，主要内容包括：本发明涉及回收膜的制备技术领域,具体涉及一种新风能量回收膜及其制备方法,包括活性碳粉、石墨烯、除甲醛功能材料以及三维网络状聚合物,将活性碳粉、抗菌材料以及除甲醛功能材料均匀的包覆在三维网络状聚合物中形成所述回收膜。本发明制备的回收膜具有高的拉伸强度和断裂伸长率,其平均值分别为137MPa和53％；并且制备的回收膜具备高的导热性、热收缩率以及透湿量,其平均值分别为2.277W/(m·K)、3.9％以及361g/(m～(2)·h)。回收膜中含有纳米级石墨烯材料,因石墨烯特殊的高比表面积特性,具有极低的表面摩擦系数,同比于其他材质膜材风阻更小；同时也不易于吸附灰尘,自清洁功效显著。(The invention relates to the technical field of preparation of recovery membranes, in particular to a fresh air energy recovery membrane and a preparation method thereof. The recycled film prepared by the invention has high tensile strength and elongation at break, and the average values are 137MPa and 53 percent respectively; and recovery of the preparationThe film has high thermal conductivity, thermal shrinkage and moisture permeability, and the average values are 2.277W/(m.K), 3.9% and 361 g/(m.K) 2 H). The recycled film contains a nano-scale graphene material, and due to the special high specific surface area characteristic of graphene, the recycled film has an extremely low surface friction coefficient and smaller wind resistance than other material film materials; meanwhile, dust is not easy to adsorb, and the self-cleaning effect is obvious.)

1. The fresh air energy recovery membrane is characterized by comprising active carbon powder, an antibacterial material, a formaldehyde removing functional material and a three-dimensional network polymer, wherein the active carbon powder, the antibacterial material and the formaldehyde removing functional material are uniformly coated in the three-dimensional network polymer to form the recovery membrane.

2. The preparation method of the fresh air energy recovery film based on claim 1, characterized by comprising the following steps:

s1, respectively calculating the addition amounts of a solvent, a dispersing agent, a monomer, a cross-linking agent, activated carbon powder, an antibacterial material and a formaldehyde removal functional material according to experimental requirements;

s2, weighing the materials involved in the step S1, and respectively and sequentially adding the materials into a ball milling tank;

s3, placing the ball milling tank on a ball mill for ball milling to obtain slurry;

s4, conveying the slurry into a forming die for curing to obtain a green body;

and S5, placing the green body into a temperature and humidity drying box for drying to obtain a recovered film.

3. The method for preparing a fresh air energy recovery membrane according to claim 2, wherein the solvent accounts for 0 to 22 wt% of the sum of the components in step S1; the dispersant accounts for 1 to 4 wt% of the sum of the components in step S1; the monomer accounts for 5 to 6 wt% of the sum of the components in step S1; the crosslinking agent accounts for 2 to 4 wt% of the sum of the components in step S1; the activated carbon powder accounts for 60 to 70 weight percent of the sum of the components in the step S1; the antibacterial material accounts for 5 to 8 wt% of the sum of the components in the step S1; the formaldehyde removing functional material accounts for 5 to 8 weight percent of the sum of the components in the step S1.

4. The method for preparing a fresh air energy recovery membrane according to claim 2 or 3, wherein the monomer is N, N-dimethylacrylamide, the crosslinking agent is N, N-methylenebisacrylamide, and the dispersing agent is polyethyleneimine.

5. The method for preparing a fresh air energy recovery film according to claim 2 or 3, wherein the antibacterial material is at least one of nano graphene, nano silver, zinc, titanium dioxide modified graphene, titanium dioxide and zinc oxide compound.

6. The preparation method of the fresh air energy recovery membrane as claimed in claim 2 or 3, wherein the formaldehyde removing functional material is a noble metal modified nano graphene functional material or a noble metal modified polyoxide of titanium, aluminum, tin and silicon.

Technical Field

The invention relates to the technical field of preparation of recovery membranes, in particular to a fresh air energy recovery membrane and a preparation method thereof.

Background

Along with the high-speed development of society, people's living standard has improved the time, and the living environment on every side has suffered serious destruction, and air quality seriously reduces, in order to change indoor air quality, has researched and developed air purifier and new trend system. The fresh air system filters and purifies outdoor fresh air and then introduces the fresh air into the room, and exhausts indoor polluted air to the outside of the room, so that effective circulation of indoor and outdoor air is completed, and the freshness and comfort of the indoor air are ensured.

Chinese patent (CN201910733988.5) provides a composite polymer material film and a preparation method thereof, which comprises a heat-conducting microporous substrate arranged at the bottom layer, wherein a polymer coating is coated on the heat-conducting microporous substrate, and a functional auxiliary agent is arranged in the polymer coating and at least comprises an oxygen anion functional auxiliary agent; the high molecular polymer coating is a coating structure which can obstruct gas and selectively permeate water molecules. The invention can be applied to a fresh air system, can conduct heat, can block gas, but can realize the exchange of sensible heat and latent heat through water molecules, and solves the problems that the traditional exchange paper core body cannot be washed by water and mildewed. The material film in the prior art has the problems of low strength, weak adsorption capacity and the like.

Disclosure of Invention

In order to solve the technical problems, the invention provides a fresh air energy recovery film and a preparation method thereof.

A fresh air energy recovery film comprises active carbon powder, an antibacterial material, a formaldehyde removal functional material and a three-dimensional network polymer, wherein the active carbon powder, the antibacterial material and the formaldehyde removal functional material are uniformly coated in the three-dimensional network polymer to form the recovery film.

A preparation method of a fresh air energy recovery film comprises the following steps:

s1, respectively calculating the addition amounts of a solvent, a dispersing agent, a monomer, a cross-linking agent, activated carbon powder, an antibacterial material and a formaldehyde removal functional material according to experimental requirements;

s2, weighing the materials involved in the step S1, and respectively and sequentially adding the materials into a ball milling tank;

s3, placing the ball milling tank on a ball mill for ball milling to obtain slurry;

s4, conveying the slurry into a forming die for curing to obtain a green body;

and S5, placing the green body into a temperature and humidity drying box for drying to obtain a recovered film.

Further, the solvent accounts for 0 to 22 wt% of the sum of the components in step S1; the dispersant accounts for 1 to 4 wt% of the sum of the components in step S1; the monomer accounts for 5 to 6 wt% of the sum of the components in step S1; the crosslinking agent accounts for 2 to 4 wt% of the sum of the components in step S1; the activated carbon powder accounts for 60 to 70 weight percent of the sum of the components in the step S1; the antibacterial material accounts for 5 to 8 wt% of the sum of the components in the step S1; the formaldehyde removing functional material accounts for 5 to 8 weight percent of the sum of the components in the step S1.

Further, the monomer is N, N-Dimethylacrylamide (DMAA), the cross-linking agent is N, N-methylenebisacrylamide (MBAM), and the dispersing agent is Polyethyleneimine (PEI).

Further, the antibacterial material is at least one of nano graphene, nano silver, zinc, titanium dioxide modified graphene, titanium dioxide and zinc oxide compounds.

Further, the formaldehyde removing functional material is a noble metal modified nano graphene functional material or a noble metal modified polyoxide of titanium, aluminum, tin and silicon.

The invention relates to a fresh air energy recovery film and a preparation method thereof, and the fresh air energy recovery film has the beneficial effects that: 1. according to the invention, through the high-speed rotation of the ball mill, the dispersing agent is uniformly dispersed on the surface of the solid matter, so that homogeneous slurry is formed, the slurry is poured into a mold for molding, and a recovery film is formed through the curing action of the monomer and the cross-linking agent, so that the preparation method has the advantages of easiness in molding and formation of a film with a complex shape; 2. the monomer and the cross-linking agent are cured to form a three-dimensional network structure, and the activated carbon powder, the antibacterial material and the formaldehyde removing functional material are uniformly coated in the three-dimensional network structure, so that on one hand, a recovery film with uniform performance can be formed, and on the other hand, the tensile strength and the elongation at break of the recovery film can be improved through the three-dimensional network structure; 3. the recycled film contains a nano-scale graphene material, and due to the special high specific surface area characteristic of graphene, the recycled film has an extremely low surface friction coefficient and smaller wind resistance than other material film materials; meanwhile, dust is not easy to adsorb, and the self-cleaning effect is obvious; 4. the heated monomer N, N-Dimethylacrylamide (DMAA) can decompose nitrogen and hydrogen, and the porosity of the recovery film can be properly improved, so that the moisture permeability of the recovery film is relatively improved.

Detailed Description

The present invention will be further described with reference to specific examples and experimental data, but the following description is only for the purpose of explaining the present invention and does not limit the contents thereof.

Example 1

A preparation method of a fresh air energy recovery film comprises the following steps:

s1, respectively calculating the addition amounts of a solvent, a dispersing agent, a monomer, a cross-linking agent, activated carbon powder, an antibacterial material and a formaldehyde removal functional material according to experimental requirements; wherein, the solvent and the dispersant are Polyethyleneimine (PEI), N-Dimethylacrylamide (DMAA), the cross-linking agent is N, N-methylenebisacrylamide (MBAM), activated carbon powder, nano-graphene and the addition amount of the noble metal modified nano-graphene functional material are respectively as follows: 22 wt%, 1 wt%, 5 wt%, 2 wt%, 60 wt%, 5 wt%, and 5 wt%;

s2, weighing the materials involved in the step S1, and respectively and sequentially adding the materials into a ball milling tank;

s3, placing the ball milling tank on a ball mill for ball milling to obtain slurry; wherein the ball milling speed is 200r/min, and the ball milling time is 2 h;

s4, conveying the slurry into a forming die for curing to obtain a green body; wherein the curing temperature is 80 ℃, and the curing time is 3 hours;

and S5, placing the green body into a temperature and humidity drying box for drying to obtain a recovered film, wherein the drying temperature is 50 ℃ and the humidity is 40%.

Example 2

A preparation method of a fresh air energy recovery film comprises the following steps:

s1, respectively calculating the addition amounts of a solvent, a dispersing agent, a monomer, a cross-linking agent, activated carbon powder, an antibacterial material and a formaldehyde removal functional material according to experimental requirements; wherein, the solvent and the dispersant are Polyethyleneimine (PEI), N-Dimethylacrylamide (DMAA), the cross-linking agent is N, N-methylenebisacrylamide (MBAM), activated carbon powder, nano-graphene and the addition amount of the noble metal modified nano-graphene functional material are respectively as follows: 18 wt%, 1 wt%, 5 wt%, 2 wt%, 62 wt%, 6 wt% and 6 wt%;

s2, weighing the materials involved in the step S1, and respectively and sequentially adding the materials into a ball milling tank;

s3, placing the ball milling tank on a ball mill for ball milling to obtain slurry; wherein the ball milling speed is 200r/min, and the ball milling time is 2 h;

s4, conveying the slurry into a forming die for curing to obtain a green body; wherein the curing temperature is 80 ℃, and the curing time is 3 hours;

and S5, placing the green body into a temperature and humidity drying box for drying to obtain a recovered film, wherein the drying temperature is 50 ℃ and the humidity is 40%.

Example 3

A preparation method of a fresh air energy recovery film comprises the following steps:

s1, respectively calculating the addition amounts of a solvent, a dispersing agent, a monomer, a cross-linking agent, activated carbon powder, an antibacterial material and a formaldehyde removal functional material according to experimental requirements; wherein, the solvent and the dispersant are Polyethyleneimine (PEI), N-Dimethylacrylamide (DMAA), the cross-linking agent is N, N-methylenebisacrylamide (MBAM), activated carbon powder, nano-graphene and the addition amount of the noble metal modified nano-graphene functional material are respectively as follows: 15 wt%, 2 wt%, 5 wt%, 2 wt%, 64 wt%, 6 wt% and 6 wt%;

s2, weighing the materials involved in the step S1, and respectively and sequentially adding the materials into a ball milling tank;

s3, placing the ball milling tank on a ball mill for ball milling to obtain slurry; wherein the ball milling speed is 200r/min, and the ball milling time is 2 h;

s4, conveying the slurry into a forming die for curing to obtain a green body; wherein the curing temperature is 80 ℃, and the curing time is 3 hours;

and S5, placing the green body into a temperature and humidity drying box for drying to obtain a recovered film, wherein the drying temperature is 50 ℃ and the humidity is 40%.

Example 4

A preparation method of a fresh air energy recovery film comprises the following steps:

s1, respectively calculating the addition amounts of a solvent, a dispersing agent, a monomer, a cross-linking agent, activated carbon powder, an antibacterial material and a formaldehyde removal functional material according to experimental requirements; wherein, the solvent and the dispersant are Polyethyleneimine (PEI), N-Dimethylacrylamide (DMAA), the cross-linking agent is N, N-methylenebisacrylamide (MBAM), activated carbon powder, nano-graphene and the addition amount of the noble metal modified nano-graphene functional material are respectively as follows: 7 wt%, 3 wt%, 6 wt%, 4 wt%, 66 wt%, 7 wt% and 7 wt%;

s2, weighing the materials involved in the step S1, and respectively and sequentially adding the materials into a ball milling tank;

s3, placing the ball milling tank on a ball mill for ball milling to obtain slurry; wherein the ball milling speed is 200r/min, and the ball milling time is 2 h;

s4, conveying the slurry into a forming die for curing to obtain a green body; wherein the curing temperature is 80 ℃, and the curing time is 3 hours;

and S5, placing the green body into a temperature and humidity drying box for drying to obtain a recovered film, wherein the drying temperature is 50 ℃ and the humidity is 40%.

Example 5

A preparation method of a fresh air energy recovery film comprises the following steps:

s1, respectively calculating the addition amounts of a solvent, a dispersing agent, a monomer, a cross-linking agent, activated carbon powder, an antibacterial material and a formaldehyde removal functional material according to experimental requirements; wherein, the solvent and the dispersant are Polyethyleneimine (PEI), N-Dimethylacrylamide (DMAA), the cross-linking agent is N, N-methylenebisacrylamide (MBAM), activated carbon powder, nano-graphene and the addition amount of the noble metal modified nano-graphene functional material are respectively as follows: 0 wt%, 4 wt%, 6 wt%, 4 wt%, 70 wt%, 8 wt%, and 8 wt%;

s2, weighing the materials involved in the step S1, and respectively and sequentially adding the materials into a ball milling tank;

s3, placing the ball milling tank on a ball mill for ball milling to obtain slurry; wherein the ball milling speed is 200r/min, and the ball milling time is 2 h;

s4, conveying the slurry into a forming die for curing to obtain a green body; wherein the curing temperature is 80 ℃, and the curing time is 3 hours;

and S5, placing the green body into a temperature and humidity drying box for drying to obtain a recovered film, wherein the drying temperature is 50 ℃ and the humidity is 40%.

Table 1 shows the properties of the recovered films obtained in examples 1 to 5

As can be seen from the experimental data in table 1, the recycled films prepared according to the present invention have high tensile strength and elongation at break, the average values of which are 137MPa and 53%, respectively; the prepared recycling film has high thermal conductivity, thermal shrinkage rate and moisture permeability, and the average values are 2.277W/(m.K), 3.9% and 361 g/(m.K)²·h)。

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.