Wall material for preventing and treating mildew of traditional dwellings and preparation method of wall material

Abstract

The invention discloses a traditional folk house mildew prevention and control wall material which is prepared by mixing 30-35% by mass of modified zeolite, 15-20% by mass of cement, 8-10% by mass of a silver ion agent, 5-8% by mass of diatomite, 3-5% by mass of calcium silicate whiskers, 3-5% by mass of pearl powder, 6-8% by mass of glass fibers, 5-8% by mass of a flame retardant and 10-15% by mass of water, and spraying a potassium methyl silicate layer during molding maintenance. The modified zeolite is prepared by modifying porous zeolite particles through fluorocarbon resin, and the silver ion agent is prepared by mixing silver-loaded hydroxyapatite and silver iodide; the modified zeolite serves as aggregate filler and is matched with the silver ion agent prepared through compounding, growth of mould of components in the wall can be inhibited, the mould-proof effect is achieved, meanwhile, a waterproof layer can be formed on the surface of the wall by spraying potassium methyl silicate diluent during wall forming and curing, the wall is prevented from being affected with damp, and the service life of the wall is prolonged. The mildew-proof effect is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a wall material for preventing and controlling mildew in traditional residential buildings and a preparation method thereof. Background Art

[0002] With the increasing development of urban construction, the problem of moldy walls in building buildings and its harmfulness have attracted more and more attention. The embarrassing situation of moldy walls accompanied by odor will not only reduce the beauty of the working and living environment, but also shorten the service life of the wall structure, and more importantly, it will cause harm to people's health.

[0003] During long-term use, traditional dwellings are prone to wall mildew due to moisture, poor ventilation and other reasons, which not only affects the appearance and structural safety of the building, but the mold dust produced by the explosion of mold spores may also cause harm to the health of residents. Current mildew prevention measures mostly rely on surface coating of mildew inhibitors, but this method has limited effect and is not long-lasting. Therefore, the present invention proposes a wall material for preventing and controlling mildew in traditional dwellings and a preparation method thereof to solve the problems existing in the prior art. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to propose a wall material for preventing and controlling mildew in traditional folk houses and a preparation method thereof. The wall material for preventing and controlling mildew in traditional folk houses and the preparation method thereof use modified zeolite as aggregate filler and a composite silver ion agent to inhibit the growth of mildew from the internal components of the wall itself, thereby achieving an anti-mildew effect. At the same time, by spraying a diluted potassium methyl silicate solution during wall forming and maintenance, a waterproof layer can be formed on the wall surface, thereby preventing the wall from getting damp, thereby cutting off the moisture required for mildew growth, and further improving the anti-mildew effect.

[0005] To achieve the purpose of the present invention, the present invention is achieved through the following technical scheme: a wall material for preventing and controlling mildew in traditional folk houses, comprising modified zeolite, cement, silver ion agent, diatomaceous earth, calcium silicate whisker, pearl powder, glass fiber, flame retardant and water mixed in a mass percentage of 30-35%: 15-20%: 8-10%: 5-8%: 3-5%: 3-5%: 6-8%: 5-8%: 10-15%, wherein the modified zeolite is made by modifying porous zeolite particles with fluorocarbon resin, and the silver ion agent is made by mixing silver-loaded hydroxyapatite and silver iodide.

[0006] A further improvement is that the porous zeolite particles are prepared by treating zeolite particles with acid and alkali, and the mass ratio of the porous zeolite particles to the fluorocarbon resin is 50-60:35-45.

[0007] A further improvement is that the mass ratio of the silver-loaded hydroxyapatite to silver iodide is 30-40:55-65, and the silver-loaded hydroxyapatite is prepared by reacting hydroxyapatite with silver nitrate with a concentration of 2g / L.

[0008] Further improvements are: the length of the glass fiber is 5 to 15 mm; the flame retardant is one or more of ammonium phosphonate, azide compounds, polyamides, aluminum hydrobromide and ammonium hydrobromide.

[0009] A method for preparing a wall material for preventing and controlling mildew in a traditional residential building comprises the following steps:

[0010] Step 1, preparing modified zeolite, first crushing and screening natural zeolite, then subjecting it to acid treatment and alkali treatment to obtain porous zeolite particles, finally mixing the porous zeolite particles with fluorocarbon resin, filtering out the porous zeolite particles and drying them, and obtaining modified zeolite for standby use;

[0011] Step 2: premixing auxiliary materials, adding cement, diatomaceous earth, calcium silicate whisker, pearl powder and glass fiber into a trough mixer for mixing and stirring to obtain prefabricated powder;

[0012] Step 3, preparation of concrete slurry, adding the prefabricated powder into a concrete mixer, then adding water to mix and stir thoroughly to obtain a slurry, and finally adding the modified zeolite and stirring rapidly to obtain concrete slurry;

[0013] Step 4: Adding and mixing additives: adding the flame retardant and the silver ion agent into the concrete slurry respectively, and stirring to obtain a finished concrete;

[0014] Step 5: Wall forming and curing: pour the finished concrete into the mold, apply pressure to form it, and then wait for it to solidify before spraying potassium methyl silicate on its surface without dead corners for curing to obtain a mildew-proof wall.

[0015] A further improvement is that: the acid treatment and the alkali treatment in the step 1 are specifically firstly carried out with an acid treatment of 0.01 mol / L oxalic acid aqueous solution, then with an alkali treatment of 0.9 mol / L sodium hydroxide aqueous solution, and finally with 0.11 mol / L disodium ethylenediaminetetraacetate for pickling, so as to obtain porous zeolite particles; after the acid treatment, the alkali treatment and the pickling, the particles are rinsed with deionized water and then dried at a temperature of 240 to 260° C. for 20 to 30 minutes.

[0016] Further improvements are: in the step 1, the particle size of the zeolite particles after crushing and screening is controlled between 4 and 6 mm; in the step 1, the porous zeolite particles and the fluorocarbon resin are mixed and stirred under ultrasonic vibration conditions.

[0017] A further improvement is that the preparation method of silver-loaded hydroxyapatite in the silver ion agent in step 4 is to first crush the hydroxyapatite, then add it to silver nitrate with a concentration of 2 g / L, and heat it to 40°C for reaction. After 2 hours, the reactant is filtered out and rinsed with deionized water, and finally dried at a temperature of 80 to 90°C, and then ground to obtain silver-loaded hydroxyapatite.

[0018] A further improvement is that before spraying potassium methyl silicate in step 5, it is diluted into an aqueous solution at a ratio of 2.5g / 100ml, and then sprayed and cured using a spray gun. The spraying is performed 3 times in total, with an interval of 12 to 24 hours between each time.

[0019] The beneficial effects of the present invention are as follows: the present invention uses the modified zeolite as an aggregate filler and a composite silver ion agent to inhibit the growth of mold from the internal components of the wall itself to achieve an anti-mold effect. At the same time, by spraying a potassium methyl silicate dilution during wall forming and maintenance, a waterproof layer can be formed on the wall surface to prevent the wall from getting damp, thereby cutting off the moisture required for mold growth, further improving the anti-mold effect, and providing a wall material suitable for various climates for preventing and controlling mildew in residential buildings, which is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a flow chart of the preparation method of the embodiment. DETAILED DESCRIPTION

[0021] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0022] The fluorocarbon resin used in the embodiment is one of polychlorotrifluoroethylene / vinyl ether resin and polyvinyl fluoride resin.

[0023] Example 1

[0024] according to Figure 1As shown, this embodiment provides a wall material for preventing and controlling mildew in traditional residential buildings and a preparation method thereof, comprising modified zeolite, cement, silver ion agent, diatomaceous earth, calcium silicate whisker, pearl powder, glass fiber, polyamide and water mixed in a mass percentage of 35%:20%:8%:5%:3%:3%:6%:5%:15%, wherein the modified zeolite is prepared by modifying porous zeolite particles by polytrifluorochloroethylene / vinyl ether resin, and the porous zeolite particles are prepared by acid treatment and alkali treatment of zeolite particles, and the porous zeolite particles and polytrifluorochloroethylene / vinyl ether resin are mixed in a mass ratio of 60:40; the silver ion agent is mixed by silver-loaded hydroxyapatite and silver iodide, and the silver-loaded hydroxyapatite and silver iodide are mixed in a mass ratio of 40:60, and the silver-loaded hydroxyapatite is prepared by reacting hydroxyapatite with silver nitrate with a concentration of 2g / L; the glass fiber has a length of 5-15mm, the polyamide is acetamide, and the cement is No. 325 cement.

[0025] A method for preparing a wall material for preventing and controlling mildew in a traditional residential building comprises the following steps:

[0026] Step 1, first crush and screen the natural zeolite to control the particle size of the zeolite particles to be between 4 and 6 mm, then use 0.01 mol / L oxalic acid aqueous solution for acid treatment, then use 0.9 mol / L sodium hydroxide aqueous solution for alkali treatment, and finally use 0.11 mol / L disodium ethylenediaminetetraacetic acid for acid washing to obtain porous zeolite particles, wherein after the acid treatment, alkali treatment and acid washing, they are all rinsed with deionized water and then dried at 260° C. for 20 minutes;

[0027] Finally, the porous zeolite particles and polytrifluorochloroethylene / vinyl ether resin are mixed at a mass ratio of 60:40 and stirred under ultrasonic vibration conditions, and the porous zeolite particles are filtered out and dried to obtain modified zeolite for use.

[0028] Step 2: Add No. 325 cement, diatomaceous earth, calcium silicate whisker, pearl powder and glass fiber according to the aforementioned percentages into a trough mixer for mixing and stirring to obtain a prefabricated powder.

[0029] Step 3: Add the prefabricated powder into a concrete mixer, then add water and mix thoroughly to obtain a slurry, and finally add the required mass percentage of modified zeolite and mix rapidly to obtain a concrete slurry.

[0030] Step 4, adding the aforementioned mass percentages of acetamide and silver ion agent into concrete slurry respectively, and stirring to obtain finished concrete;

[0031] The preparation method of silver-loaded hydroxyapatite in the silver ion agent is as follows: firstly, the hydroxyapatite is crushed, then added into silver nitrate with a concentration of 2 g / L, and heated to 40° C. for reaction, after 2 hours, the reactant is filtered out and rinsed with deionized water, and finally dried at a temperature of 80 to 90° C., and then ground to obtain the silver-loaded hydroxyapatite;

[0032] Then, the silver-loaded hydroxyapatite and silver iodide are mixed and stirred at a mixing mass ratio of 40:60 to prepare a silver ion agent.

[0033] Step 5: pour the finished concrete into the mold, apply pressure to shape it, and then spray potassium methyl silicate on the surface without dead corners for curing after it is cured, so as to obtain a mildew-proof wall;

[0034] Before spraying potassium methyl silicate, dilute it into an aqueous solution at a ratio of 2.5g / 100ml, and then use a spray gun for spraying and curing. Spraying is carried out 3 times in total, with an interval of 12 to 24 hours between each time.

[0035] Example 2

[0036] according to Figure 1 As shown, this embodiment provides a wall material for preventing and controlling mildew in traditional residential buildings and a preparation method thereof, comprising modified zeolite, cement, silver ion agent, diatomaceous earth, calcium silicate whisker, pearl powder, glass fiber, aluminum hydrobromide and water mixed in a mass percentage of 35%:15%:10%:5%:5%:5%:5%:5%:15%, the modified zeolite is prepared by modifying porous zeolite particles by polyvinyl fluoride resin, the porous zeolite particles are prepared by acid treatment and alkali treatment of zeolite particles, and the mass ratio of the porous zeolite particles to the polyvinyl fluoride resin is 60:40; the silver ion agent is prepared by mixing silver-loaded hydroxyapatite and silver iodide, the mass ratio of the silver-loaded hydroxyapatite to silver iodide is 35:65, and the silver-loaded hydroxyapatite is prepared by reacting hydroxyapatite with silver nitrate with a concentration of 2g / L; the glass fiber has a length of 5 to 15mm, and the cement is No. 325 cement.

[0037] A method for preparing a wall material for preventing and controlling mildew in a traditional residential building comprises the following steps:

[0038] Step 1: First, the natural zeolite is crushed and screened to control the particle size of the zeolite particles to be between 4 and 6 mm, and then the zeolite particles are treated with an acid solution of 0.01 mol / L oxalic acid, and then treated with an alkali solution of 0.9 mol / L sodium hydroxide, and finally treated with an acid solution of 0.11 mol / L disodium ethylenediaminetetraacetate to obtain porous zeolite particles, wherein the particles are rinsed with deionized water after the acid treatment, the alkali treatment and the acid washing, and then dried at 240° C. for 30 min;

[0039] Finally, the porous zeolite particles and the polyvinyl fluoride resin are mixed at a mass ratio of 60:40 and stirred under ultrasonic vibration conditions, and the porous zeolite particles are filtered out and dried to obtain the modified zeolite for use.

[0040] Step 2: Add No. 325 cement, diatomaceous earth, calcium silicate whisker, pearl powder and glass fiber according to the aforementioned mass percentage into a trough mixer for mixing and stirring to obtain a prefabricated powder.

[0041] Step 3: Add the prefabricated powder into a concrete mixer, then add water to mix and stir thoroughly to obtain a slurry, and finally add the required mass percentage of modified zeolite and stir rapidly to obtain a concrete slurry.

[0042] Step 4, adding the aforementioned mass percentages of aluminum hydrobromide and silver ion agent to the concrete slurry respectively, and stirring to obtain a finished concrete;

[0043] The preparation method of silver-loaded hydroxyapatite in the silver ion agent is as follows: firstly, the hydroxyapatite is crushed, then added into silver nitrate with a concentration of 2 g / L, and heated to 40° C. for reaction, after 2 hours, the reactant is filtered out and rinsed with deionized water, and finally dried at a temperature of 80 to 90° C., and then ground to obtain the silver-loaded hydroxyapatite;

[0044] Then, the silver-loaded hydroxyapatite and silver iodide are mixed and stirred at a mixing mass ratio of 35:65 to prepare a silver ion agent.

[0045] Step 5: pour the finished concrete into the mold, apply pressure to shape it, and then spray potassium methyl silicate on the surface without dead corners for curing after it is cured, so as to obtain a mildew-proof wall;

[0046] Before spraying potassium methyl silicate, dilute it into an aqueous solution at a ratio of 2.5g / 100ml, and then use a spray gun for spraying and curing. Spraying is carried out 3 times in total, with an interval of 12 to 24 hours between each time.

[0047] The wall materials prepared in Example 1 and Example 2 and the wall with traditional spray-coated mildew-proof coating were tested for mildew resistance according to the method of JCT2497-2018. The mildew resistance levels of Aspergillus niger, Penicillium citrinum and Trichoderma viride were tested respectively, and the mildew resistance duration was recorded. The test results are shown in Table 1 below.

[0048] Table 1 Anti-mildew performance test grade table

[0049]

[0050] Note: The duration of mildew prevention is the observation of three groups of treated wall materials in a humid environment for 60 days. The result of 60 days indicates that no mildew spots appear on the 60th day.

[0051] As shown in the above table, the mildew-proof wall prepared with the wall material of the present application can effectively prevent the generation and proliferation of three types of molds, and the mildew-proof effect is better than the traditional method of using mildew-proof coating treatment; at the same time, it can be seen from the mildew-proof duration in the table that the traditional mildew-proof coating treatment method has a poor mildew-proof effect in a humid environment. This may be due to the phenomenon of falling off and failing of the mildew-proof coating due to long-term exposure to a humid environment, resulting in a short mildew-proof time. The present application improves the wall material itself to achieve mildew-proofing, and cooperates with the surface mildew-proof spray maintenance to effectively avoid the possibility of falling off and failing of the traditional spray mildew-proof coating, thereby greatly improving the mildew-proof effect and duration.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A wall material for preventing and controlling mildew in traditional residential buildings, characterized by: The invention comprises modified zeolite, cement, silver ion agent, diatomaceous earth, calcium silicate whisker, pearl powder, glass fiber, flame retardant and water which are mixed in the mass percentage of 30-35%, 15-20%, 8-10%, 5-8%, 3-5%, 3-5%, 6-8%, 5-8% and 10-15%. The modified zeolite is made of porous zeolite particles modified by fluorocarbon resin, and the silver ion agent is made of silver-loaded hydroxyapatite and silver iodide.

2. The wall material for preventing mildew in traditional residential buildings according to claim 1, characterized in that: The porous zeolite particles are prepared by subjecting zeolite particles to acid treatment and alkali treatment, and the mass ratio of the porous zeolite particles to the fluorocarbon resin is 50-60:35-45.

3. The wall material for preventing mildew in traditional residential buildings according to claim 1, characterized in that: The mixing mass ratio of the silver-loaded hydroxyapatite to silver iodide is 30-40:55-65, and the silver-loaded hydroxyapatite is prepared by reacting hydroxyapatite with silver nitrate with a concentration of 2g / L.

4. The wall material for preventing mildew in traditional residential buildings according to claim 1, characterized in that: The length of the glass fiber is 5 to 15 mm; the flame retardant is one or more of ammonium phosphonate, azide compounds, polyamides, aluminum hydrobromide and ammonium hydrobromide.

5. A method for preparing a wall material for preventing and controlling mildew in traditional residential buildings, characterized in that: The following steps are involved: Step 1, preparing modified zeolite, first crushing and screening natural zeolite, then subjecting it to acid treatment and alkali treatment to obtain porous zeolite particles, finally mixing the porous zeolite particles with fluorocarbon resin, filtering out the porous zeolite particles and drying them, and obtaining modified zeolite for standby use; Step 2: premixing auxiliary materials, adding cement, diatomaceous earth, calcium silicate whisker, pearl powder and glass fiber into a trough mixer for mixing and stirring to obtain prefabricated powder; Step 3, preparation of concrete slurry, adding the prefabricated powder into a concrete mixer, then adding water to mix and stir thoroughly to obtain a slurry, and finally adding the modified zeolite and stirring rapidly to obtain concrete slurry; Step 4: Adding and mixing additives: adding the flame retardant and the silver ion agent into the concrete slurry respectively, and stirring to obtain a finished concrete; Step 5: Wall forming and curing: pour the finished concrete into the mold, apply pressure to form it, and then wait for it to solidify before spraying potassium methyl silicate on its surface without dead corners for curing to obtain a mildew-proof wall.

6. The method for preparing a wall material for preventing mildew in traditional residential buildings according to claim 5, characterized in that: The acid treatment and alkali treatment in step 1 are specifically: first using 0.01 mol / L oxalic acid aqueous solution for acid treatment, then using 0.9 mol / L sodium hydroxide aqueous solution for alkali treatment, and finally using 0.11 mol / L disodium ethylenediaminetetraacetate for acid washing, so as to obtain porous zeolite particles; after the acid treatment, alkali treatment and acid washing, the particles are rinsed with deionized water and then dried at 240-260° C. for 20-30 minutes.

7. The method for preparing a wall material for preventing mildew in traditional residential buildings according to claim 5, characterized in that: In the step 1, the particle size of the zeolite particles after crushing and screening is controlled to be between 4 and 6 mm; in the step 1, the porous zeolite particles and the fluorocarbon resin are mixed and stirred under ultrasonic vibration conditions.

8. The method for preparing a wall material for preventing mildew in traditional residential buildings according to claim 5, characterized in that: The preparation method of silver-loaded hydroxyapatite in the silver ion agent in step 4 is as follows: firstly crush the hydroxyapatite, then add it into silver nitrate with a concentration of 2 g / L, and heat it to 40° C. for reaction, filter out the reactant after 2 hours and rinse it with deionized water, and finally dry it at a temperature of 80 to 90° C., and then grind it to obtain the silver-loaded hydroxyapatite.

9. The method for preparing a wall material for preventing mildew in traditional residential buildings according to claim 5, characterized in that: Before spraying potassium methyl silicate in step 5, dilute it into an aqueous solution at a ratio of 2.5 g / 100 ml, and then use a spray gun for spraying and curing. The spraying is performed 3 times in total, with an interval of 12 to 24 hours between each time.

Images