阅读说明：本技术 一种防螨组合物、涂料及其应用 (Anti-mite composition, paint and application thereof ) 是由 吴生英 彭光佳 蔡永岳 熊绍泊 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种防螨组合物、涂料及其应用,其中,防螨组合物包括光触媒,光触媒包括表面包覆有稀土氧化物的纳米二氧化钛。本发明的防螨组合物中的表面包覆有稀土氧化物的纳米二氧化钛是一种绿色环保、安全无毒、可循环利用且无二次污染的光触媒,表面包覆有稀土氧化物的纳米二氧化钛在紫外光及可见光的作用下能有效地降解空气中有毒有害气体、杀灭多种细菌并将细菌或真菌释放出的毒素分解及无害化处理,同时,表面包覆有稀土氧化物的纳米二氧化钛还具备除甲醛、除臭、抗污、净化空气等功能,除此之外,表面包覆有稀土氧化物的纳米二氧化钛还具备防螨的功能,且防螨效果优于常见的光触媒。(The invention discloses an anti-mite composition, a coating and application thereof, wherein the anti-mite composition comprises a photocatalyst, and the photocatalyst comprises nano titanium dioxide with the surface coated with rare earth oxide. The nano titanium dioxide coated with the rare earth oxide on the surface in the anti-mite composition is a green, environment-friendly, safe and nontoxic photocatalyst which can be recycled and has no secondary pollution, the nano titanium dioxide coated with the rare earth oxide on the surface can effectively degrade toxic and harmful gases in the air, kill various bacteria and decompose and harmlessly treat toxins released by the bacteria or fungi under the action of ultraviolet light and visible light, and meanwhile, the nano titanium dioxide coated with the rare earth oxide on the surface also has the functions of removing formaldehyde, deodorizing, resisting dirt, purifying air and the like.)

1. The anti-mite composition is characterized by comprising a photocatalyst, wherein the photocatalyst comprises nano titanium dioxide coated with rare earth oxide on the surface.

2. The anti-mite composition as claimed in claim 1, wherein the photocatalyst further comprises a first dispersant, an amphoteric surfactant, and deionized water;

preferably, the photocatalyst comprises 0.5-10.0 parts by mass of nano titanium dioxide coated with rare earth oxide on the surface, 0.1-0.5 part by mass of first dispersing agent, 0.1-0.3 part by mass of amphoteric surfactant and deionized water, wherein the total parts by mass of the photocatalyst is calculated by 100 parts by mass.

3. The anti-mite composition as claimed in claim 1 or 2, further comprising a second dispersant, a pH regulator, an antibacterial agent, a mite-inducing agent, deionized water;

preferably, the anti-mite composition comprises 1.0-10.0 parts by mass of nano titanium dioxide coated with rare earth oxide on the surface, 0.1-1.0 part by mass of a second dispersing agent, 0.1-1.0 part by mass of a pH regulator, 0-5.0 parts by mass of an antibacterial agent, 0.1-1.0 part by mass of a mite-inducing agent and deionized water, wherein the total parts by mass of the anti-mite composition are calculated according to 100 parts by mass;

or the anti-mite composition comprises 10.0-99.0 parts by mass of photocatalyst, 0.1-1.0 part by mass of second dispersing agent, 0.1-1.0 part by mass of pH regulator, 0-5.0 parts by mass of antibacterial agent, 0.1-1.0 part by mass of mite inducer and deionized water, wherein the total parts by mass of the anti-mite composition are calculated according to 100 parts by mass;

more preferably, the anti-mite composition comprises 50.0 to 99.0 parts by mass of a photocatalyst.

4. The anti-mite composition of claim 1, wherein the rare earth oxide is La₂O₃、Yb₂O₃、CeO₂、Nd₂O₃One or a combination of several of them.

5. The anti-mite composition as claimed in claim 1, wherein the preparation method of the nano titanium dioxide coated with the rare earth oxide on the surface comprises the following steps:

(A) adding titanium dioxide into isopropanol and dispersing to obtain a suspension;

(B) adding isopropoxy rare earth into the anhydrous suspension subjected to anaerobic treatment and dispersing to obtain reaction liquid;

(C) adding acetic acid into the reaction solution transferred to the air condition, and adjusting the pH value to 8.0-9.0 to obtain an intermediate product;

(D) aging the intermediate product and filtering to obtain a filter cake;

(E) calcining the filter cake to obtain the nano titanium dioxide coated with the rare earth oxide on the surface;

preferably, the suspension concentration in step (a) is 30 grams per liter;

more preferably, the concentration of acetic acid in step (C) is 1 mole per liter.

6. An anti-mite composition according to claim 5, wherein the dispersion in step (B) is carried out at 50 ℃;

preferably, the calcination in step (E) is carried out at 800 ℃.

7. The anti-mite composition as claimed in claim 1, wherein the particle size of the nano titanium dioxide coated with the rare earth oxide on the surface is 3-30 nm;

preferably, the particle size of the nano titanium dioxide coated with the rare earth oxide on the surface is 5-10 nm;

more preferably, the nano-titania is anatase titania.

8. A coating comprising the anti-mite composition of any one of claims 1 to 7.

9. Use of an anti-mite composition according to any one of claims 1 to 7 or a coating according to claim 8 for anti-mite and/or aldehyde scavenging and/or anti-bacterial purposes.

10. Use according to claim 9, wherein the anti-mite composition or coating is attached to the surface of an object or the anti-mite composition or coating is attached to the light emitting surface of a light emitter.

Technical Field

The invention belongs to the technical field of photocatalyst application, and particularly relates to an anti-mite composition, a coating and application thereof.

Background

In recent years, the destruction of carpets by mite larvae and the destruction of fiber products by microorganisms have been increasing, and the problem of allergic diseases caused by mites inhabiting articles such as bedding has been becoming more serious. The current mite prevention technology mainly utilizes reagent to remove mites or equipment to remove mites. The anti-mite agent is divided into an organic anti-mite agent and an inorganic anti-mite agent. Most of organic anti-mite agents need pesticide approval numbers, such as clofentezine, propargite and the like; or toxic products, which are not suitable for use in environments where the human body is in direct or indirect contact with the human body; plant extracts are a representative of organic miticides, and commercial miticide sprays such as those in japan, australia, germany, and the like, mainly disturb the nerve of mites to inhibit their reproduction, and have a weak miticidal effect. The inorganic anti-mite agent mainly utilizes a physical principle, and water balance of mites is influenced to cause water loss of the mites, so that the reproductive capacity of the mites is weakened, the proliferation of the mites is inhibited, and the mites cannot be killed from the source, and is represented by a silicate glass inorganic anti-mite agent SR-AM100 of Nitri Mirabilis. The mite removing equipment is mainly dust removing equipment, such as a mite removing dust collector reported in Chinese invention patent CN106419736A, and an ultraviolet sterilizing lamp is used for removing mites, for example, 254nm ultraviolet light can bring secondary harm to ozone, and 365nm ultraviolet light has weak killing capacity to mites.

The present invention has been made in view of this situation.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an anti-mite composition, a coating and application thereof so as to solve the technical problems that the existing anti-mite agent is toxic and has weak anti-mite effect.

In order to solve the technical problems, the invention adopts the technical scheme that:

an anti-mite composition comprises a photocatalyst, wherein the photocatalyst comprises nano titanium dioxide coated with rare earth oxide on the surface.

The anti-mite composition is in a transparent sol state, has an ultraviolet-visible absorption spectrum with absorption at 400-600 nm, has a pH value close to neutral, is non-toxic, environment-friendly and free of secondary pollution, and has an anti-mite rate of more than 50%, formaldehyde purification efficiency and purification performance durability of more than 85% and 75% respectively and an antibacterial rate of more than 99.9% under the condition of irradiating for 24 hours by visible light; under the condition of 365nm ultraviolet irradiation for 2 hours, the acaricidal rate is more than 70 percent. The ultraviolet-visible absorption spectrum of the photocatalyst in the anti-mite composition is absorbed at a position of 400-600 nm, the dye degradation efficiency in a visible light region reaches more than 80% under the condition of 2-hour irradiation of a 300-watt xenon lamp, and the dye degradation efficiency reaches more than 90% within 30 minutes under the condition of ultraviolet lamp irradiation.

Further, the photocatalyst also comprises a first dispersing agent, an amphoteric surfactant and deionized water; preferably, the photocatalyst comprises 0.5-10.0 parts by mass of nano titanium dioxide coated with rare earth oxide on the surface, 0.1-0.5 part by mass of first dispersing agent, 0.1-0.3 part by mass of amphoteric surfactant and deionized water, wherein the total parts by mass of the photocatalyst is calculated by 100 parts by mass; preferably, the surface of the nano titanium dioxide coated with the rare earth oxide is 1.0 part by mass. When the photocatalyst only comprises the nano titanium dioxide of which the surface is coated with the rare earth oxide, the photocatalyst is powder, and when the photocatalyst also comprises a first dispersing agent, an amphoteric surfactant and deionized water, the photocatalyst is sol, preferably, the solid content of the sol is 0.5-10.0%, namely, the content of the nano titanium dioxide of which the surface is coated with the rare earth oxide in the sol is 0.5-10.0%, the sol has good dispersibility and high adhesive force.

Further, the first dispersant is sodium hexametaphosphate.

Further, the amphoteric surfactant is an amino acid type amphoteric surfactant and/or a betaine type amphoteric surfactant; preferably, the amino acid type amphoteric surfactant is dodecylaminopropionic acid, and the betaine type amphoteric surfactant is dodecyldimethylsulfopropyl betaine.

Further, the anti-mite composition also comprises a second dispersing agent, a pH regulator, an antibacterial agent, a mite-inducing agent and deionized water; preferably, the anti-mite composition comprises 1.0-10.0 parts by mass of nano titanium dioxide coated with rare earth oxide on the surface, 0.1-1.0 part by mass of a second dispersing agent, 0.1-1.0 part by mass of a pH regulator, 0-5.0 parts by mass of an antibacterial agent, 0.1-1.0 part by mass of a mite-inducing agent and deionized water, wherein the total parts by mass of the anti-mite composition are calculated according to 100 parts by mass; or the anti-mite composition comprises 10.0-99.0 parts by mass of photocatalyst, 0.1-1.0 part by mass of second dispersing agent, 0.1-1.0 part by mass of pH regulator, 0-5.0 parts by mass of antibacterial agent, 0.1-1.0 part by mass of mite inducer and deionized water, wherein the total parts by mass of the anti-mite composition are calculated according to 100 parts by mass; more preferably, the anti-mite composition comprises 50.0-99.0 parts by mass of photocatalyst, 0.1 part of mite-inducing agent, 0.3 part of pH regulator and 1.0 part of antibacterial agent; further preferably, the anti-mite composition comprises 80.0-99.0 parts by mass of a photocatalyst.

Further, the second dispersant is polyacrylic acid sodium salt and/or polyalkyl alcohol ammonium salt; preferably, the sodium polyacrylate salt is SN 5040 and the polyalkyl alcohol ammonium salt is ADS-50.

Further, the particle size of the nano titanium dioxide coated with the rare earth oxide on the surface is 3-30 nm; preferably, the particle size of the nano titanium dioxide coated with the rare earth oxide on the surface is 5-10 nm.

Further, the nano titanium dioxide is anatase titanium dioxide.

Further, the mite-inducing agent is pheromone and/or plant essential oil; preferably, the pheromone is one or a combination of more of dodecadienol, Fromen, 8-methyl-2-n-decanol propionic acid, 4-allyl anisole, 4-methoxy cinnamaldehyde, 4-methoxy acrylate and cis-10-hexadecane aldehyde; more preferably, the plant essential oil is one or more of lemon essential oil, tea tree essential oil, eucalyptus essential oil, rose essential oil and mixed essential oil. Preferably, the mite-inducing agent is plant essential oil, and more preferably, the mite-inducing agent is mixed essential oil.

Further, the pH regulator is amine and/or alkaline water solution; preferably, the pH regulator is one or more of ammonia, 2-methyl-2-amino-1-propanol, triethylamine, nitrogen-butyl diethanolamine, sodium hydroxide aqueous solution and potassium hydroxide aqueous solution. Preferably, the pH adjusting agent is an amine, more preferably, the pH adjusting agent is nitrogen-butyl diethanolamine.

Further, the antibacterial agent is one or a combination of more of an Ag antibacterial agent, a Zn antibacterial agent and a Cu antibacterial agent; preferably, the antimicrobial agent is Ag polymer antimicrobial agent, Ag₂O、AgCl、ZnO、Cu₂O、CuO、CuCl₂、CuSO₄One or a combination of several of them. Preferably, the antimicrobial agent is an Ag polymer antimicrobial agent. The antibacterial efficiency of the antibacterial agent to staphylococcus aureus and escherichia coli is higher than 90%.

Further, the rare earth oxide is La₂O₃、Yb₂O₃、CeO₂、Nd₂O₃One or a combination of several of them.

Further, the preparation method of the nano titanium dioxide coated with the rare earth oxide on the surface comprises the following steps:

(A) adding titanium dioxide into isopropanol and dispersing to obtain a suspension;

(B) adding isopropoxy rare earth into the anhydrous suspension subjected to anaerobic treatment and dispersing to obtain reaction liquid;

(C) adding acetic acid into the reaction solution transferred to the air condition, and adjusting the pH value to 8.0-9.0 to obtain an intermediate product;

(D) aging the intermediate product and filtering to obtain a filter cake;

(E) calcining the filter cake to obtain the nano titanium dioxide coated with the rare earth oxide on the surface;

preferably, the suspension concentration in step (a) is 30 grams per liter;

more preferably, the concentration of acetic acid in step (C) is 1 mole per liter.

Further, the dispersion in step (B) is carried out at 50 ℃;

preferably, the calcination in step (E) is carried out at 800 ℃.

Furthermore, the isopropoxy rare earth can be one or a combination of more of lanthanum isopropoxide, ytterbium isopropoxide, neodymium isopropoxide and cerium tetraisopropoxide.

Further, the curing operation may be: the intermediate product was placed in a hydrothermal reaction kettle and was subjected to hydrothermal treatment at 140,160,180,200 ℃ for 20 minutes, respectively.

Specifically, the preparation method of the nano titanium dioxide coated with the rare earth oxide on the surface comprises the following steps:

(A) preparing 30 grams of suspension per liter of titanium dioxide P25 by using an isopropanol solvent, adding the suspension into a round bottom container with a reflux condenser and a stirrer, turning on the stirrer, and adjusting the rotation speed to 700-800;

(B) after anhydrous and anaerobic treatment, adding isopropoxy rare earth powder, heating to 50 ℃, and dispersing and stirring for 30 minutes to obtain reaction liquid;

(C) transferring the reaction solution to the air condition, performing ultrasonic dispersion for 15 minutes, adding 1 mol of acetic acid per liter, and adjusting the pH value to 8.0-9.0 to obtain an intermediate product;

(D) carrying out a curing process on the intermediate product for 20 minutes, then filtering and washing with deionized water to obtain a filter cake;

(E) and placing the filter cake in a muffle furnace, and calcining for 1 hour at 800 ℃ to obtain the nano titanium dioxide powder coated with the rare earth oxide on the surface.

Further, the preparation method of the photocatalyst comprises the following steps:

(A) the raw materials are prepared according to the following formula:

0.5-10.0 parts by mass of nano titanium dioxide coated with rare earth oxide on surface

0.1-0.5 parts by mass of first dispersant

0.1 to 0.3 part by mass of an amphoteric surfactant

Deionized water

Wherein the total mass part of the photocatalyst is calculated by 100 mass parts;

(B) adding deionized water into a round bottom container with a stirrer, turning on the stirrer, and adjusting to 300-500 rotating speeds;

(C) adding the first dispersing agent and the amphoteric surfactant into a container, and stirring for 1 minute at room temperature;

(D) adjusting the rotating speed of the stirrer to 1300-1500 revolutions, adding the nano titanium dioxide coated with the rare earth oxide within 3 minutes, and continuing stirring for 15 minutes;

(E) the rotation speed is adjusted to 300-500 revolutions, and the photocatalyst is obtained after continuously dispersing for 20 minutes.

Further, the preparation method of the anti-mite composition comprises the following steps:

(A) the raw materials are prepared according to the following formula:

10.0 to 99.0 parts by mass of a photocatalyst

0.1-1.0 parts by mass of a second dispersant

0.1-1.0 parts by mass of pH regulator

0 to 5.0 parts by mass of an antibacterial agent

0.1-1.0 mass part of mite-inducing agent

Deionized water

Wherein the total mass part of the anti-mite composition is calculated by 100 mass parts;

(B) adding deionized water into a round bottom container with a reflux condenser and a stirrer, turning on the stirrer, and adjusting to 300-500 rotating speeds;

(C) adding the second dispersing agent into a container, and stirring for 1 minute at room temperature;

(D) slowly adding a pH regulator, and continuously stirring for 1 minute;

(E) adjusting the rotating speed of the stirrer to 700-800 revolutions, finishing adding the sol within 5 minutes, raising the temperature to 50 ℃, and continuing stirring for 5 minutes;

(F) and adjusting the rotating speed to 300-500 revolutions, respectively adding the antibacterial agent and the mite-inducing agent, and dispersing for 10 minutes to obtain the mite-preventing composition.

Alternatively, the first and second electrodes may be,

(A) the raw materials are prepared according to the following formula:

1.0-10.0 parts by mass of nano titanium dioxide coated with rare earth oxide on surface

0.1-1.0 parts by mass of a second dispersant

0.1-1.0 parts by mass of pH regulator

0 to 5.0 parts by mass of an antibacterial agent

0.1-1.0 mass part of mite-inducing agent

Deionized water

Wherein the total mass part of the anti-mite composition is calculated by 100 mass parts;

(B) adding deionized water into a round bottom container with a reflux condenser and a stirrer, turning on the stirrer, and adjusting to 300-500 rotating speeds;

(C) adding the second dispersing agent into a container, and stirring for 1 minute at room temperature;

(D) slowly adding a pH regulator, and continuously stirring for 1 minute;

(E) adjusting the rotating speed of the stirrer to 1300-1500 revolutions, adding the nano titanium dioxide coated with the rare earth oxide in 5 minutes, heating to 70 ℃, and continuing stirring for 10 minutes;

(F) and adjusting the rotating speed to 300-500 revolutions, respectively adding the antibacterial agent and the mite-inducing agent, and dispersing for 10 minutes to obtain the mite-preventing composition.

The invention also provides a coating which is characterized by comprising the anti-mite composition.

The invention also provides the application of the anti-mite composition or the coating in mite prevention and/or aldehyde removal and/or antibiosis. In particular in the field of textiles.

Further, the anti-mite composition or coating is attached to the surface of an object, or the anti-mite composition or coating is attached to the light emitting surface of the light emitting body. Specifically, the anti-mite composition can be prepared into a spray to be sprayed on the surface of the textile, and a 365nm ultraviolet light source or an indoor visible light source is used as an auxiliary light source to realize the mite, aldehyde and bacteria removal of the textile; or the anti-mite composition is directly and uniformly coated on the surface of the light source glass through one or more of spraying, roller coating, brush coating and dip coating, so that the mite, aldehyde and bacteria of the textile are removed.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the nano titanium dioxide coated with the rare earth oxide on the surface in the anti-mite composition is a green, environment-friendly, safe and nontoxic photocatalyst which can be recycled and has no secondary pollution, the nano titanium dioxide coated with the rare earth oxide on the surface can effectively degrade toxic and harmful gases in the air, kill various bacteria and decompose and harmlessly treat toxins released by the bacteria or fungi under the action of ultraviolet light and visible light, and meanwhile, the nano titanium dioxide coated with the rare earth oxide on the surface also has the functions of removing formaldehyde, deodorizing, resisting dirt, purifying air and the like.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below, and the following embodiments are used for illustrating the present invention and are not used for limiting the scope of the present invention.

The experimental procedures in the following examples are conventional unless otherwise specified. The experimental materials used in the following examples were purchased from a conventional biochemical reagent store unless otherwise specified.