阅读说明：本技术 一种改性多孔微粒净化空气功效的内墙涂料 (Interior wall coating with modified porous particles and air purification effect ) 是由 王保军 拾振洪 李海洋 金传亮 回留柱 王家振 于 2020-07-07 设计创作，主要内容包括：本发明公开了一种改性多孔微粒净化空气功效的内墙涂料,涉及内墙涂料技术领域,具体工艺如下：1)马尾藻进行炭化处理；2)利用炭化马尾藻粉与氢氧化钾制得多孔炭；3)利用氧化锌粉末、多孔碳粉以及硝酸铈,制得预处理多孔碳；4)将去离子水、羧甲基纤维素以及涂料助剂混合,搅拌后加入预处理多孔炭以及填料,研磨后制成白浆,然后将白浆分批慢速加入到涂料乳液中,搅拌均匀,即可得到所需的内墙涂料。本发明通过对具有吸附净化空气作用的多孔碳进行处理,在多孔炭的表面构建由氧化锌纳米线组成的交织网,阻止涂料中小分子组分渗入进多孔炭孔隙中造成孔隙的堵塞,避免其净化空气功效降低的现象出现,从而可以更好的改善空气质量。(The invention discloses an interior wall coating with the air purifying effect of modified porous particles, which relates to the technical field of interior wall coatings and comprises the following specific processes: 1) carbonizing gulfweed; 2) preparing porous carbon by using carbonized sargassum powder and potassium hydroxide; 3) preparing pretreated porous carbon by using zinc oxide powder, porous carbon powder and cerium nitrate; 4) mixing deionized water, carboxymethyl cellulose and a coating auxiliary agent, adding pretreated porous carbon and a filler after stirring, grinding to prepare white slurry, then adding the white slurry into a coating emulsion in batches at a low speed, and stirring uniformly to obtain the required interior wall coating. According to the invention, the porous carbon with the air adsorption and purification function is treated, and the interwoven net consisting of the zinc oxide nanowires is constructed on the surface of the porous carbon, so that small molecular components in the coating are prevented from permeating into pores of the porous carbon to cause pore blockage, and the phenomenon of reduction of the air purification effect is avoided, thereby better improving the air quality.)

1. The interior wall coating with the air purifying effect of the modified porous particles is characterized by comprising the following specific processes:

1) weighing a proper amount of sargassum, cleaning, placing in a drying oven with the temperature of 110 ℃ for drying for 23-27h, grinding the dried sample in a grinder, screening out powder to obtain sargassum powder, then placing the sargassum powder in a tube furnace, keeping the temperature of 600 ℃ to 700 ℃ for 150min in a nitrogen atmosphere, and then cooling to room temperature to obtain carbonized sargassum powder;

2) weighing a proper amount of carbonized sargassum powder and potassium hydroxide, mixing the carbonized sargassum powder and the potassium hydroxide according to a certain mass ratio, adding the carbonized sargassum powder and the potassium hydroxide into deionized water, stirring the mixture into slurry, then placing the slurry into a muffle furnace, keeping the temperature of 700-750 ℃ for 130min in a pure nitrogen atmosphere, cooling the slurry to room temperature to obtain an activated sample, then mixing the activated sample and the deionized water to form slurry, filtering and washing the slurry by using the deionized water, removing impurities and enabling the pH value of the sample to be neutral, and placing the slurry in a drying oven for drying to obtain porous carbon;

3) weighing a proper amount of zinc oxide powder, porous carbon powder and cerium nitrate, mixing the zinc oxide powder, the porous carbon powder and the cerium nitrate in an absolute ethanol solution, performing 300-400W ultrasonic dispersion for 10-20min, drying and then uniformly grinding to obtain a 400-ion 600-mesh source material, placing the source material in a quartz boat, then placing the quartz boat into a tubular furnace, depositing for 20-25min at the temperature of 900-ion 950 ℃, keeping the pressure in the tubular furnace at 100-ion 200Pa, simultaneously introducing carrier gas and an oxygen source into the tubular furnace in the deposition process, cooling to room temperature after the reaction is finished, and taking out a product from the tubular furnace to obtain pretreated porous carbon;

4) mixing deionized water, carboxymethyl cellulose and a coating auxiliary agent, stirring at a low speed, adding a proper amount of pretreated porous carbon and a filler, dispersing at a high speed, grinding by a grinding machine to prepare white slurry, adding the obtained white slurry into a coating emulsion in batches at a low speed, stirring uniformly, adding the latter batch of white slurry, repeating the operation until the white slurry is added completely, and stirring uniformly to obtain the required interior wall coating.

2. The interior wall coating material with the air purifying effect of the modified porous particles as claimed in claim 1, wherein in the process step 1), the screening particle size of the powder is 100-200 meshes; the temperature rise rate of the tubular furnace is 4-6 ℃/min; the nitrogen flow is 3-5L/min.

3. The modified porous particle air-purifying interior wall coating of claim 1, wherein in process step 2), the mass ratio of the carbonized sargassum powder to the potassium hydroxide is 1: 3.0-4.5; the heating rate of the muffle furnace is 4-6 ℃/min; the temperature of the drying oven is 120-130 ℃, and the drying time is 20-25 h.

4. The modified porous particle air purification effect interior wall coating material of claim 1, wherein in the process step 3), the mass ratio of the zinc oxide powder to the porous carbon is 1: 1-1.5; the cerium nitrate accounts for 3-6% of the mass of the source material; controlling the temperature rise time in the tubular furnace to be 40-50 min; the carrier gas is argon, and the flow rate is 50-60 ml/min; the oxygen source is oxygen, and the flow rate is 1-5 ml/min.

5. The modified porous particle air purification interior wall coating material of claim 1, wherein in the process step 4), the components are calculated according to the following weight parts: 30-40 parts of deionized water, 10-13 parts of carboxymethyl cellulose, 3-6 parts of a coating additive, 1-3 parts of pretreated porous carbon, 2-5 parts of a filler and 15-25 parts of a coating emulsion.

6. The modified porous particle air purification interior wall coating of claim 1, wherein in process step 4), the coating emulsion is selected from any one of styrene-acrylic emulsion and acrylic emulsion; the filler is selected from at least one of calcium carbonate, nano titanium dioxide and talcum powder; the coating auxiliary agent comprises a dispersing agent, a pH regulator, a silane coupling agent, a defoaming agent, a thickening agent or any combination thereof.

7. The modified porous particle air-purifying interior wall coating of claim 1, wherein in the process step 4), the rotation speed of the low-speed stirring is 500-; the high-speed stirring speed is 2000-2500r/min, and the stirring time is 20-30 min; the fineness of the white pulp is 40-60 um.

Technical Field

The invention belongs to the technical field of interior wall coatings, and particularly relates to an interior wall coating with an air purifying effect by modified porous particles.

Background

Along with the continuous improvement of living conditions, the requirement of modern decoration is higher and higher, people increasingly pay attention to creating environment-friendly and healthy indoor environment, the good indoor environment ensures the important guarantee of the health of people, the indoor environment is beautified, the personalized decoration is highlighted, and the artistic texture coating with good quality is selected, so that the personalized of the home environment is highlighted, and the follow-up adverse phenomena of falling, cracking, peeling and the like after the decoration are not worried.

The traditional indoor interior wall paint generally only has a decoration function and is suitable for common rooms. In rooms of our daily life or work, such as some special spaces like toilets and smoking rooms, the peculiar smell is serious, and even if the rooms are cleaned in time, the bad smell still exists in the next day. The main reason is that the peculiar smell substances float in the room for a long time after being generated and cannot be emitted, and are finally adsorbed on the wall or other furniture in the room, so that the peculiar smell substances are accumulated day by day and continuously emitted. For example, chinese patent CN2015107759525 discloses a silver foil coating powder with air purifying function, and specifically discloses that attapulgite clay powder and zeolite with excellent adsorption performance are used to adsorb harmful substances in air such as formaldehyde, ammonia and benzene, thereby realizing the technical effect of air purification, but in the coating, part of small molecular particles of the attapulgite clay powder and zeolite with porous structure will permeate into the pores of the attapulgite clay powder and zeolite, thereby causing pore blockage, and further causing the reduction of the adsorption performance of the attapulgite clay powder and zeolite, so that in the actual application, the air purifying effect of the coating is far lower than the expected theoretical value, and the actual requirement cannot be met.

Disclosure of Invention

The invention aims to solve the existing problems and provides an interior wall coating with the air purifying effect of modified porous particles.

The invention is realized by the following technical scheme:

the inner wall paint with the air purifying effect of modified porous particles has the following specific process:

1) weighing a proper amount of sargassum, cleaning, placing in a drying oven with the temperature of 110 ℃ for drying for 23-27h, placing the dried sample in a crusher for grinding, screening out powder with the particle size of 200 meshes with the temperature of 100-;

2) weighing a proper amount of carbonized sargassum powder and potassium hydroxide, mixing the carbonized sargassum powder and the potassium hydroxide according to a mass ratio of 1:3.0-4.5, adding the carbonized sargassum powder and the potassium hydroxide into deionized water, stirring the mixture into slurry, then placing the slurry into a muffle furnace, heating the mixture to 700-750 ℃ at a speed of 4-6 ℃/min under a pure nitrogen atmosphere, keeping the temperature for 130min for 100-plus, cooling the mixture to room temperature to obtain an activated sample, then mixing the activated sample and the deionized water to form slurry, filtering and washing the slurry by using the deionized water, removing impurities and enabling the pH value of the sample to be neutral, and placing the slurry into a 120-plus 130 ℃ drying oven for drying for 20-; according to the invention, gulfweed is used as a raw material, carbonization treatment is carried out to obtain porous carbon with a porous structure, and potassium hydroxide is adopted to carry out activation treatment on carbonized gulfweed, so that cracking and condensation reaction can be continuously carried out on the porous carbon, bridge bonds and side chains in the porous carbon are reduced, the internal structure is gradually ordered, the graphitization degree is improved, and the stability of the porous carbon structure is improved;

3) weighing zinc oxide powder and porous carbon powder according to the mass ratio of 1:1-1.5, adding a proper amount of cerium nitrate, mixing the zinc oxide powder and the porous carbon powder in an absolute ethanol solution, carrying out 300-400W ultrasonic dispersion for 10-20min, drying, grinding uniformly to obtain a 400-ion 600-mesh source material with the cerium nitrate content of 3-6%, placing the source material in a quartz boat, then placing the quartz boat in a tubular furnace, controlling the temperature rise time to be 40-50min, depositing at 900-950 ℃ for 20-25min, keeping the pressure in the tubular furnace at 100-ion 200Pa, simultaneously introducing argon with the flow of 50-60ml/min and oxygen with the flow of 1-5ml/min into the tubular furnace in the deposition process, cooling to room temperature after the reaction is finished, and taking out a product from the tubular porous carbon furnace to obtain pretreatment; according to the invention, porous carbon is used as a substrate, zinc oxide nanowires doped with rare earth element cerium are grown on the surface of the porous carbon, the formed zinc oxide nanowires are mutually staggered and stacked to form an interwoven net on the surface of the porous carbon, and the formed nanowire interwoven net can prevent small molecular components in a coating from permeating into pores of the porous carbon to cause pore blockage, so that the phenomenon of reducing the air purifying effect of the coating occurs; the rare earth element is doped in the zinc oxide nanowire, so that the growth of nano zinc oxide grains can be inhibited, and the thin nanowire with small particle size can be obtained, so that the phenomenon that partial pores of the porous carbon are changed into closed pores due to the blockage of the surface pores of the porous carbon by the nanowire interweaving net caused by the thick nanowire can be avoided;

4) mixing 30-40 parts by weight of deionized water, 10-13 parts by weight of carboxymethyl cellulose and 3-6 parts by weight of coating auxiliary agent, stirring at a low speed, adding 1-3 parts by weight of pretreated porous carbon and 2-5 parts by weight of filler, dispersing at a high speed, grinding by a grinder to prepare white slurry with the fineness of 50-60um, adding the obtained white slurry into 15-25 parts by weight of coating emulsion at a low speed, stirring uniformly, adding the next batch of white slurry, repeating the operation until the white slurry is completely added, and stirring uniformly to obtain the required inner wall coating.

Further, the coating emulsion is selected from any one of styrene-acrylic emulsion and acrylic emulsion; the filler is selected from at least one of calcium carbonate, nano titanium dioxide and talcum powder; the coating auxiliary agent comprises a dispersing agent, a pH regulator, a silane coupling agent, a defoaming agent, a thickening agent or any combination thereof.

Compared with the prior art, the invention has the following advantages:

according to the interior wall coating provided by the invention, the porous carbon with the air adsorption and purification effects is treated, the interwoven net consisting of the zinc oxide nanowires is constructed on the surface of the porous carbon, the formed nanowire interwoven net is uniform in distribution and loose in arrangement, the specific surface area of the porous carbon is increased, the contact interaction between the porous carbon and the external gas environment is facilitated, the air purification efficiency is promoted, meanwhile, the formed nanowire interwoven net can prevent small molecular components in the coating from permeating into pores of the porous carbon to cause pore blockage, the phenomenon that the air purification efficiency is reduced is avoided, and therefore, the air quality can be better improved.

Detailed Description

The present invention will be further described with reference to specific embodiments.