CN112337191A - Preparation method of filter material with formaldehyde removal function - Google Patents

Preparation method of filter material with formaldehyde removal function Download PDF

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Publication number
CN112337191A
CN112337191A CN202011142077.4A CN202011142077A CN112337191A CN 112337191 A CN112337191 A CN 112337191A CN 202011142077 A CN202011142077 A CN 202011142077A CN 112337191 A CN112337191 A CN 112337191A
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parts
filter material
formaldehyde
mixing
prepare
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Inventor
单兴刚
聂凯
王刚强
章金芳
王鑫宇
陈淑君
冯华峰
斯文婷
潘小丹
朱玫琦
张欣雨
谢诗毓
陶埼波
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Zhejiang Heyi Purification Technology Co ltd
Shaoxing Lanzhu New Material Technology Co ltd
Keyi College of ZSTU
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Zhejiang Heyi Purification Technology Co ltd
Shaoxing Lanzhu New Material Technology Co ltd
Keyi College of ZSTU
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0001—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20792—Zinc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/70—Non-metallic catalysts, additives or dopants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air

Abstract

The invention discloses a preparation method of a filter material with a formaldehyde removal function, which comprises the following steps: 1) preparing a filter material treating agent; 2) preparing a formaldehyde photocatalytic decomposer; 3) uniformly coating the filter material treating agent prepared in the step 1) on the surface of a filter material; the invention solves the problem of poor formaldehyde removal effect in the prior art, polyvinyl acetate is used as a remover and forms a polycondensation reaction with formaldehyde after alcoholysis, so that the formaldehyde is rapidly removed, and partial alcoholysis polyvinyl alcohol is polymerized and crosslinked with hydroxy cellulose and silica sol, so that the coating fastness is improved, and a good removal effect is achieved. The polyvinyl acetate can be protected from acid catalysts by hydroxy cellulose and nano silica gel.

Description

Preparation method of filter material with formaldehyde removal function
Technical Field
The invention belongs to the technical field of preparation of functional filter materials, and particularly relates to a preparation method of a filter material with a formaldehyde removal function.
Background
Formaldehyde is a colorless, pungent odor gas that is readily soluble in water, alcohols, and ethers. Formaldehyde has a wide range of uses in industry. It is commonly used in textiles, dyes, leather, resins, paints, plastics, rubber, pharmaceuticals, explosives, and the like. The formaldehyde pollution thus originates mainly from the above products. The harm of formaldehyde to human body is mainly shown in the following aspects: formaldehyde can bind to proteins in the plasma of somatic cells, altering the internal structure of the protein and clotting, thereby rendering it biocidal. The mucous membrane of the eye is stimulated initially at low concentration, the upper respiratory tract is stimulated at high concentration, cough and chest distress are caused, meanwhile, the neck has oppression feeling, the mucous membrane is ulcerated, and further inflammation is caused in the lung. After formaldehyde is inhaled, anorexia, weight loss, asthenia and insomnia can be caused; this can lead to hypersensitivity if contacted frequently and can result in ulceration of the skin tissue. Formaldehyde has an anesthetic effect on the central nervous system, and particularly has a strong poisoning effect on eyesight. In addition, formaldehyde can damage intracellular genetic material and is a suspected carcinogen. The long-term exposure to formaldehyde gas can cause headache, weakness, irregular perspiration, temperature change, accelerated pulse, rash, eczema, red swelling and the like. The World Health Organization (WHO) and the united states environmental protection agency have thus listed formaldehyde as a suspected carcinogen and an important environmental pollutant. Due to the toxicity of formaldehyde, the food is forbidden to add formaldehyde in food according to the clear regulations in the food sanitation law of China. The restriction of formaldehyde is regulated in the textile industry and governments around the world, or an environmental label method of textiles is established. In recent years, as the living conditions of people are improved, the national promulgated 'hygienic standard for formaldehyde in the air of a room'.
Traditional filter media such as PP filter paper, glass fiber, compound PP-PET filter paper, melt blown polyester non-woven fabrics and melt blown glass fiber make filter equipment, can only filter particulate matter and dust, can't get rid of formaldehyde molecule in the air to filterable dust granule can bring bacterium, virus into, influences the air purification quality, if introduce purification coating at the filtering material surface then need solve coating fastness and coating outward appearance scheduling problem.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a preparation method of a filter material with a formaldehyde removal function. In view of coating fastness and appearance: hydroxyl cellulose, nano silica sol and polyvinyl acetate are introduced for organic-inorganic hybrid polycondensation to improve the coating fastness; the appearance effect is reduced, and the gloss effect of the coating is reduced by using nano-powder with smaller nano-particle diameter and low refractive index (such as alumina and silicon oxide).
In order to achieve the technical purpose, the technical scheme of the invention is as follows: a preparation method of a filter material with a formaldehyde removal function comprises the following steps:
1) preparing a filter material treating agent: firstly, weighing the following raw materials in parts by mass, and mixing to prepare powder: 10-40 parts of water-soluble hydroxy cellulose, 10-20 parts of blueberry leaf polyphenol, 5-8 parts of sodium alginate, 3-6 parts of sodium citrate, 15-30 parts of polyvinyl acetate, 0.5-1 part of sodium dodecyl sulfate and 30-50 parts of nano aluminum oxide;
and weighing the following raw materials in parts by mass, and mixing to prepare a liquid preparation: 10-20 parts of acetic acid, 5-10 parts of ethanol, 30-50 parts of nano silicon dioxide colloid and 3-5 parts of distilled water; mixing and stirring the powder and the liquid preparation according to the mass ratio of 3-10 to prepare a filter material treating agent;
2) preparation of formaldehyde photocatalytic decomposer: weighing the following raw materials in parts by mass, and mixing to prepare the formaldehyde photocatalytic decomposer: 10-20 parts of zinc oxide with the particle size of less than or equal to 5nm, 10-20 parts of anatase crystal type titanium dioxide with the particle size of less than 10nm, 0.1-1 part of silver nitrate, 40-60 parts of ethanol, 20-30 parts of distilled water and 1-5 parts of ethyl silicate;
3) uniformly coating the filter material treating agent prepared in the step 1) on the surface of a filter material, then spraying distilled water on the surface until the filter material is thoroughly wetted, standing for 1-3h, and finally drying the filter material; the coating amount of the filter material treating agent is 3-6mL/cm2The spraying amount of the distilled water is 10-30mL/cm2(ii) a Then soaking the filter material in the formaldehyde photocatalytic decomposition agent prepared in the step 2) for 10-20min, taking out and airing, and carrying out heat treatment for 15-30min at the temperature of 100-200 ℃ in an oven.
The invention has the following advantages:
1. the invention solves the problem of poor formaldehyde removal effect in the prior art, polyvinyl acetate is used as a remover and forms a polycondensation reaction with formaldehyde after alcoholysis, so that the formaldehyde is rapidly removed, and partial alcoholysis polyvinyl alcohol is polymerized and crosslinked with hydroxy cellulose and silica sol, so that the coating fastness is improved, and a good removal effect is achieved. The polyvinyl acetate can be protected from acid catalysts by hydroxy cellulose and nano silica gel.
2. According to the invention, acetic acid in the agent is used as an acid catalyst, so that the whole acidity is improved, the removal of formaldehyde is promoted, and the solubility of partial polyvinyl formal in acetic acid is utilized, so that the rapid removal of the base material formaldehyde is realized, and the performance of the filter material is not influenced. The residual unreacted polyvinyl acetate and the excessive alcoholysis polyvinyl alcohol can form organic and inorganic reaction polymers with hydroxy cellulose and silica sol, and the organic and inorganic reaction polymers are dried and polymerized to form a film. After the dry film is formed, the acetic acid catalyst is wrapped by being adsorbed by the nano silicon dioxide and is isolated from the remover, and under the influence of wind speed and moisture in air in the filtering process of the filter material, the acid catalyst can be gradually released and transferred to the surface of the nano silicon dioxide polymer adsorbed with the remover to carry out acidification catalytic reaction, so that formaldehyde passing through the filter material or adsorbed is removed.
3. According to the invention, polyvinyl alcohol, hydroxy cellulose and silica sol are used for ternary polymerization crosslinking, low-refractive-index aluminum oxide and silicon oxide are compounded, and titanium dioxide and zinc oxide with small nanoparticle diameters are doped, so that the fastness and ageing resistance of the coating are improved, and the influence of the gloss appearance of the coating is reduced.
4. The invention utilizes the zinc oxide and titanium dioxide catalyst compounded with silver ions to well solve the problem that the formaldehyde removal effect of functional molecular polymers in the previous working procedure is short-term and rapid in a large amount but the durability is insufficient through a chemical reaction method, and the introduction of the catalyst can prolong the formaldehyde removal antibacterial performance and endow a filter material filtering device or a filter bag with the environment-friendly functions of durably decomposing formaldehyde and purifying air.
Detailed Description
The present invention is described in detail with reference to examples, but the present invention is not limited to the claims.
Example 1
Preparing a filter material with a formaldehyde removal function according to the following steps:
1) preparing a filter material treating agent: firstly, weighing the following raw materials in parts by mass, and mixing to prepare powder: 40 parts of water-soluble hydroxy cellulose, 20 parts of blueberry leaf polyphenol, 8 parts of sodium alginate, 6 parts of sodium citrate, 30 parts of polyvinyl acetate, 0.5 part of sodium dodecyl sulfate and 50 parts of nano-alumina;
and weighing the following raw materials in parts by mass, and mixing to prepare a liquid preparation: 20 parts of acetic acid, 10 parts of ethanol, 50 parts of nano silicon dioxide colloid and 5 parts of distilled water; and (2) mixing the powder and the liquid preparation according to the mass ratio of 10: 1 mixing and stirring to prepare a filter material treating agent;
2) preparation of formaldehyde photocatalytic decomposer: weighing the following raw materials in parts by mass, and mixing to prepare the formaldehyde photocatalytic decomposer: 20 parts of zinc oxide with the particle size of less than 5nm, 10 parts of anatase crystal type titanium dioxide with the particle size of less than 10nm, 1 part of silver nitrate, 40 parts of ethanol, 30 parts of distilled water and 5 parts of ethyl silicate;
3) uniformly coating the filter material treating agent prepared in the step 1) on the surface of a filter material, then spraying distilled water on the surface until the filter material is thoroughly wetted, standing for 3 hours, and finally drying the filter material; the coating amount of the filter material treating agent is 6mL/cm2The spraying amount of the distilled water is 30mL/cm2(ii) a Then soaking the filter material in the formaldehyde photocatalytic decomposition agent prepared in the step 2), soaking for 20min, taking out and airing, and carrying out heat treatment for 30min at the temperature of 200 ℃ in an oven.
Example 2
Preparing a filter material with a formaldehyde removal function according to the following steps:
1) preparing a filter material treating agent: firstly, weighing the following raw materials in parts by mass, and mixing to prepare powder: 30 parts of water-soluble hydroxy cellulose, 20 parts of blueberry leaf polyphenol, 8 parts of sodium alginate, 3 parts of sodium citrate, 15 parts of polyvinyl acetate, 0.5 part of sodium dodecyl sulfate and 50 parts of nano-alumina;
and weighing the following raw materials in parts by mass, and mixing to prepare a liquid preparation: 20 parts of acetic acid, 10 parts of ethanol, 30 parts of nano silicon dioxide colloid and 3 parts of distilled water; and (3) mixing the powder and the liquid preparation according to a mass ratio of 3:1 mixing and stirring to prepare a filter material treating agent;
2) preparation of formaldehyde photocatalytic decomposer: weighing the following raw materials in parts by mass, and mixing to prepare the formaldehyde photocatalytic decomposer: 20 parts of zinc oxide with the particle size of less than 5nm, 10 parts of anatase crystal type titanium dioxide with the particle size of less than 10nm, 0.1 part of silver nitrate, 60 parts of ethanol, 30 parts of distilled water and 5 parts of ethyl silicate;
3) uniformly coating the filter material treating agent prepared in the step 1) on the surface of the filter material, then spraying distilled water on the surface until the filter material is thoroughly wetted, standing for 3h, and finallyDrying the filter material; the coating amount of the filter material treating agent is 3mL/cm2The spraying amount of the distilled water is 10mL/cm2(ii) a Then soaking the filter material in the formaldehyde photocatalytic decomposition agent prepared in the step 2), soaking for 20min, taking out and airing, and carrying out heat treatment for 15min at the temperature of 100 ℃ in an oven.
Example 3
Preparing a filter material with a formaldehyde removal function according to the following steps:
1) preparing a filter material treating agent: firstly, weighing the following raw materials in parts by mass, and mixing to prepare powder: 20 parts of water-soluble hydroxy cellulose, 15 parts of blueberry leaf polyphenol, 8 parts of sodium alginate, 6 parts of sodium citrate, 15 parts of polyvinyl acetate, 0.5 part of sodium dodecyl sulfate and 50 parts of nano-alumina;
and weighing the following raw materials in parts by mass, and mixing to prepare a liquid preparation: 20 parts of acetic acid, 10 parts of ethanol, 30 parts of nano silicon dioxide colloid and 5 parts of distilled water; mixing and stirring the powder and the liquid preparation according to the mass ratio of 3:1 to prepare a filter material treating agent;
2) preparation of formaldehyde photocatalytic decomposer: weighing the following raw materials in parts by mass, and mixing to prepare the formaldehyde photocatalytic decomposer: 20 parts of zinc oxide with the particle size of less than 5nm, 10 parts of anatase crystal type titanium dioxide with the particle size of less than 10nm, 0.1 part of silver nitrate, 50 parts of ethanol, 20 parts of distilled water and 5 parts of ethyl silicate;
3) uniformly coating the filter material treating agent prepared in the step 1) on the surface of a filter material, then spraying distilled water on the surface until the filter material is thoroughly wetted, standing for 1h, and finally drying the filter material; the coating amount of the filter material treating agent is 5mL/cm2The spraying amount of the distilled water is 20mL/cm2(ii) a Then soaking the filter material in the formaldehyde photocatalytic decomposition agent prepared in the step 2), soaking for 20min, taking out and airing, and carrying out heat treatment for 15min at the temperature of 200 ℃ in an oven.
Example 4
Preparing a filter material with a formaldehyde removal function according to the following steps:
1) preparing a filter material treating agent: firstly, weighing the following raw materials in parts by mass, and mixing to prepare powder: 25 parts of water-soluble hydroxy cellulose, 15 parts of blueberry leaf polyphenol, 5 parts of sodium alginate, 5 parts of sodium citrate, 15 parts of polyvinyl acetate, 0.5 part of sodium dodecyl sulfate and 50 parts of nano-alumina;
and weighing the following raw materials in parts by mass, and mixing to prepare a liquid preparation: 20 parts of acetic acid, 10 parts of ethanol, 30 parts of nano silicon dioxide colloid and 5 parts of distilled water; mixing and stirring the powder and the liquid preparation according to the mass ratio of 3:1 to prepare a filter material treating agent;
2) preparation of formaldehyde photocatalytic decomposer: weighing the following raw materials in parts by mass, and mixing to prepare the formaldehyde photocatalytic decomposer: 20 parts of zinc oxide with the particle size of less than 5nm, 10 parts of anatase crystal type titanium dioxide with the particle size of less than 10nm, 0.1 part of silver nitrate, 50 parts of ethanol, 20 parts of distilled water and 5 parts of ethyl silicate;
3) uniformly coating the filter material treating agent prepared in the step 1) on the surface of a filter material, then spraying distilled water on the surface until the filter material is thoroughly wetted, standing for 1h, and finally drying the filter material; the coating amount of the filter material treating agent is 5mL/cm2The spraying amount of the distilled water is 20mL/cm2(ii) a Then soaking the filter material in the formaldehyde photocatalytic decomposition agent prepared in the step 2), soaking for 20min, taking out and airing, and carrying out heat treatment for 15min at the temperature of 200 ℃ in an oven.
Example 5
Preparing a filter material with a formaldehyde removal function according to the following steps:
1) preparing a filter material treating agent: firstly, weighing the following raw materials in parts by mass, and mixing to prepare powder: 35 parts of water-soluble hydroxy cellulose, 15 parts of blueberry leaf polyphenol, 8 parts of sodium alginate, 6 parts of sodium citrate, 15 parts of polyvinyl acetate, 0.5 part of sodium dodecyl sulfate and 50 parts of nano-alumina;
and weighing the following raw materials in parts by mass, and mixing to prepare a liquid preparation: 20 parts of acetic acid, 10 parts of ethanol, 30 parts of nano silicon dioxide colloid and 3 parts of distilled water; and (3) mixing the powder and the liquid preparation according to a mass ratio of 3:1 mixing and stirring to prepare a filter material treating agent;
2) preparation of formaldehyde photocatalytic decomposer: weighing the following raw materials in parts by mass, and mixing to prepare the formaldehyde photocatalytic decomposer: 20 parts of zinc oxide with the particle size of less than 5nm, 10 parts of anatase crystal type titanium dioxide with the particle size of less than 10nm, 0.1 part of silver nitrate, 60 parts of ethanol, 30 parts of distilled water and 5 parts of ethyl silicate;
3) uniformly coating the filter material treating agent prepared in the step 1) on the surface of a filter material, then spraying distilled water on the surface until the filter material is thoroughly wetted, standing for 3 hours, and finally drying the filter material; the coating amount of the filter material treating agent is 3mL/cm2The spraying amount of the distilled water is 10mL/cm2(ii) a Then soaking the filter material in the formaldehyde photocatalytic decomposition agent prepared in the step 2), soaking for 20min, taking out and airing, and carrying out heat treatment for 15min at the temperature of 100 ℃ in an oven.
Comparative example 1
Preparing a filter material with a formaldehyde removal function according to the following steps:
1) preparing a filter material treating agent: firstly, weighing the following raw materials in parts by mass, and mixing to prepare powder: 40 parts of water-soluble hydroxy cellulose, 20 parts of blueberry leaf polyphenol, 8 parts of sodium alginate, 6 parts of sodium citrate, 30 parts of polyvinyl acetate, 0.5 part of sodium dodecyl sulfate and 50 parts of nano-alumina;
and weighing the following raw materials in parts by mass, and mixing to prepare a liquid preparation: 20 parts of acetic acid, 10 parts of ethanol, 50 parts of nano silicon dioxide colloid and 5 parts of distilled water; and (2) mixing the powder and the liquid preparation according to the mass ratio of 10: 1 mixing and stirring to prepare a filter material treating agent;
2) uniformly coating the filter material treating agent prepared in the step 1) on the surface of a filter material, then spraying distilled water on the surface until the filter material is thoroughly wetted, standing for 3 hours, and finally drying the filter material; the coating amount of the filter material treating agent is 6mL/cm2The spraying amount of the distilled water is 30mL/cm2(ii) a Heat treatment is carried out for 30min at the oven temperature of 200 ℃.
Comparative example 2
Preparing a filter material with a formaldehyde removal function according to the following steps:
1) preparation of formaldehyde photocatalytic decomposer: weighing the following raw materials in parts by mass, and mixing to prepare the formaldehyde photocatalytic decomposer: 20 parts of zinc oxide with the particle size of less than 5nm, 10 parts of anatase crystal type titanium dioxide with the particle size of less than 10nm, 1 part of silver nitrate, 40 parts of ethanol, 30 parts of distilled water and 5 parts of ethyl silicate;
2) soaking the filter material in the formaldehyde photocatalytic decomposition agent prepared in the step 1) for 20min, taking out and airing, and carrying out heat treatment at the temperature of 200 ℃ in an oven for 30 min.
Formaldehyde removal performance test
The filter materials of the composite coating prepared by the preparation methods of the example 1, the comparative example 1 and the comparative example 2 are respectively cut into filter bags with the diameter of 50cm and the length of 50cm by three groups of filter materials of the example 1, the comparative example 1 and the comparative example 2, and the filter bags are placed in a space of 1m3The test cabin is fixedly suspended, air is let to pass through the filter bag, a comparison test is carried out under the same condition, the test method partially refers to the test step of 6.5 purification efficiency in JC/T1074-2008 'indoor air purification function coating material purification performance' standard, the power of a 365nm ultraviolet lamp is added in the middle, a formaldehyde dynamic dispersion source is placed in the test cabin, and the concentration is about (1.0 +/-0.2) mg/m3H, testing by using a photocatalytic material, and measuring the formaldehyde removal rate by selecting 5 days as test time in the test in order to obtain comparison of the formaldehyde removal effects of the three test filter bags, as shown in the following table.
Figure 768826DEST_PATH_IMAGE002
According to the test results, the three coatings have the formaldehyde removing effect, and the filter bag compounded by the two coatings has a better formaldehyde removing effect.
It should be understood that the detailed description of the invention is merely illustrative of the invention and is not intended to limit the invention to the specific embodiments described. It will be appreciated by those skilled in the art that the present invention may be modified or substituted equally as well to achieve the same technical result; as long as the use requirements are met, the method is within the protection scope of the invention.

Claims (3)

1. A preparation method of a filter material with a formaldehyde removal function is characterized by comprising the following steps:
1) preparing a filter material treating agent: firstly, weighing the following raw materials in parts by mass, and mixing to prepare powder: 10-40 parts of water-soluble hydroxy cellulose, 10-20 parts of blueberry leaf polyphenol, 5-8 parts of sodium alginate, 3-6 parts of sodium citrate, 15-30 parts of polyvinyl acetate, 0.5-1 part of sodium dodecyl sulfate and 30-50 parts of nano aluminum oxide;
and weighing the following raw materials in parts by mass, and mixing to prepare a liquid preparation: 10-20 parts of acetic acid, 5-10 parts of ethanol, 30-50 parts of nano silicon dioxide colloid and 3-5 parts of distilled water; mixing and stirring the powder and the liquid preparation according to the mass ratio of 3-10 to prepare a filter material treating agent;
2) preparation of formaldehyde photocatalytic decomposer: weighing the following raw materials in parts by mass, and mixing to prepare the formaldehyde photocatalytic decomposer: 10-20 parts of zinc oxide with the particle size of less than or equal to 5nm, 10-20 parts of anatase crystal type titanium dioxide with the particle size of less than 10nm, 0.1-1 part of silver nitrate, 40-60 parts of ethanol, 20-30 parts of distilled water and 1-5 parts of ethyl silicate;
3) uniformly coating the filter material treating agent prepared in the step 1) on the surface of a filter material, then spraying distilled water on the surface until the filter material is thoroughly wetted, standing for 1-3h, and finally drying the filter material; the coating amount of the filter material treating agent is 3-6mL/cm2The spraying amount of the distilled water is 10-30mL/cm2(ii) a Then soaking the filter material in the formaldehyde photocatalytic decomposition agent prepared in the step 2) for 10-20min, taking out and airing, and carrying out heat treatment for 15-30min at the temperature of 100-200 ℃ in an oven.
2. The method for preparing the filter material with the formaldehyde removing function according to claim 1, wherein the preparation of the filter material treating agent in the step 1): firstly, weighing the following raw materials in parts by mass, and mixing to prepare powder: 40 parts of water-soluble hydroxy cellulose, 20 parts of blueberry leaf polyphenol, 8 parts of sodium alginate, 6 parts of sodium citrate, 30 parts of polyvinyl acetate, 0.5 part of sodium dodecyl sulfate and 50 parts of nano-alumina; and weighing the following raw materials in parts by mass, and mixing to prepare a liquid preparation: 20 parts of acetic acid, 10 parts of ethanol, 50 parts of nano silicon dioxide colloid and 5 parts of distilled water; and (2) mixing the powder and the liquid preparation according to the mass ratio of 10: 1 mixing and stirring to prepare the filter material treating agent.
3. The method for preparing a filter material with a formaldehyde removal function according to claim 1, wherein the step 2) is a step of preparing a formaldehyde photocatalytic decomposition agent: weighing the following raw materials in parts by mass, and mixing to prepare the formaldehyde photocatalytic decomposer: 20 parts of zinc oxide with the particle size of less than 5nm, 10 parts of anatase crystal type titanium dioxide with the particle size of less than 10nm, 1 part of silver nitrate, 40 parts of ethanol, 30 parts of distilled water and 5 parts of ethyl silicate.
CN202011142077.4A 2020-10-23 2020-10-23 Preparation method of filter material with formaldehyde removal function Pending CN112337191A (en)

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