Environmentally friendly porous breathable putty powder and manufacturing method

Abstract

The present invention discloses an environmentally friendly porous and breathable putty powder, the raw materials of which include: Portland cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, titanium dioxide powder and attapulgite clay powder. The putty powder prepared by the method of the present invention has good water resistance and bonding strength, is not easy to peel or crack during use, and has good performance. In addition, bentonite and attapulgite clay powder with higher adsorption strength are used in the raw materials, so that the putty powder has a strong adsorption capacity, improves the heat insulation effect of the putty powder, and can adsorb harmful pollutants in the air to a certain extent, which is healthy and environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and in particular to an environmentally friendly porous breathable putty powder and a manufacturing method thereof. Background Art

[0002] Putty powder is increasingly used and plays an increasingly important role in building wall decoration. Its quality directly impacts the decorative effect of wall coatings. Traditional putty powders suffer from low bonding strength and poor water resistance, leading to coating defects such as cracking, peeling, shedding, and mold growth. Furthermore, most putty powders contain adhesives, which contain harmful substances such as formaldehyde, resulting in poor environmental performance. With the development of society and the continuous improvement of people's living standards, people's awareness of environmental protection and health has significantly increased, and they demand a more comfortable and safe living environment. Traditional putty powders are increasingly difficult to meet these requirements. Summary of the Invention

[0003] To this end, the present invention provides an environmentally friendly porous breathable putty powder, the raw materials of which include: silicate cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, titanium dioxide powder-attapulgite clay powder, and the preparation method of the modified bentonite is:

[0004] (1) preparing an aqueous solution of dopamine hydrochloride; ball-milling natural bentonite and passing it through a 1000-mesh sieve; keeping the aqueous solution of dopamine hydrochloride constant at 75±3°C in a water bath, then immersing the sieved powder in the aqueous solution of dopamine hydrochloride, stirring the solution for 10 to 20 minutes, then adding sodium hydroxide solution to the solution under stirring to adjust the pH of the solution to 8.5, stirring and keeping the solution at 75±3°C for more than 6 hours after the addition is completed, then air-cooling to room temperature, solid-liquid separation, washing the solid phase with deionized water for more than 2 times, and drying to obtain solid phase A;

[0005] (2) preparing an acetic acid solution of chitosan, adding the solid phase A to the acetic acid solution of chitosan in a nitrogen atmosphere, stirring the solution for more than 18 hours in a nitrogen atmosphere after the addition is completed, and then separating the solid and liquid, and drying the solid phase at room temperature to obtain a solid phase B;

[0006] (3) The solid phase B is dispersed in N,N-dimethylformamide to form a dispersion liquid, and the dispersion liquid is kept at a constant temperature of 80±3°C in a water bath, condensed and refluxed during the insulation process, and stirred for 5 minutes. Then, epichlorohydrin is added to the dispersion liquid under stirring, and after the addition is completed, the temperature is continued to be 80±3°C, and the condensed and refluxed stirring is performed for 60 to 70 minutes. Then, diethylenetriamine is added to the dispersion liquid under stirring, and after the addition is completed, the temperature is continued to be 80±3°C for 30 to 40 minutes. Then, it is air-cooled to room temperature, solid-liquid separation is performed, the solid phase is washed with ethanol for more than 2 times, and dried to obtain the modified bentonite.

[0007] Furthermore, the raw materials are calculated by weight as follows: 100 parts of Portland cement, 20-30 parts of modified bentonite, 20-30 parts of fine sand, 10-12 parts of talc, 6-8 parts of hydroxypropyl methylcellulose, and 5-16 parts of titanium dioxide powder-attapulgite clay powder.

[0008] Furthermore, the preparation method of the titanium dioxide powder-attapulgite clay powder is as follows: an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol are prepared, and the attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; the ethanol solution of tetrabutyl titanate is stirred, glacial acetic acid is added to the solution under stirring, and the solution is stirred for more than 30 minutes after the addition is completed, and then the aqueous solution of polyethylene glycol is added to the solution under stirring, and the solution is stirred for more than 5 minutes after the addition is completed, and then the sieved powder is added to the solution under stirring, and after the addition is completed, the solution is kept at a constant temperature of 85±3°C in a water bath and stirred for 10 to 15 minutes, air-cooled to room temperature, filtered to remove the liquid phase, and the solid phase is washed with deionized water for more than 3 times, dried at 80°C for 10 minutes, and then calcined at 500°C for 50 to 60 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder-attapulgite clay powder.

[0009] Furthermore, in the ethanol solution of tetrabutyl titanate, the mass percentage of tetrabutyl titanate is 10% to 15%, and the solvent is ethanol; in the aqueous solution of polyethylene glycol, the mass percentage of polyethylene glycol is 4% to 6%, and the solvent is water; the volume ratio of glacial acetic acid and the aqueous solution of polyethylene glycol added to the ethanol solution of tetrabutyl titanate is tetrabutyl titanate ethanol solution: glacial acetic acid: polyethylene glycol aqueous solution = 100:3-5:30-40; the mass ratio of the sieved powder added to the solution to the volume ratio of the tetrabutyl titanate ethanol solution used is sieved powder:tetrabutyl titanate ethanol solution = 6-9g:100mL.

[0010] Furthermore, in the step (1), the concentration of dopamine hydrochloride in the aqueous solution of dopamine hydrochloride is 2-3 g / 200 mL, and the solvent is water; the solid-liquid mass ratio of the sieved powder soaked in the aqueous solution of dopamine hydrochloride is solid / liquid = 1:50; the concentration of sodium hydroxide in the sodium hydroxide solution is 0.1 mol / L, and the solvent is water.

[0011] Furthermore, in step (2), the chitosan acetic acid solution is prepared by dissolving chitosan in a 5wt% acetic acid aqueous solution, and the mass ratio of chitosan to the acetic acid aqueous solution is chitosan: acetic acid aqueous solution = 2-3:100; the mass ratio of the solid phase A added to the chitosan acetic acid solution is solid phase A: chitosan acetic acid solution = 1:50.

[0012] Furthermore, in the step (3), the mass ratio of the solid phase B dispersed in N,N-dimethylformamide is solid phase B:N,N-dimethylformamide=1:100; the mass ratio of the added epichlorohydrin and diethylenetriamine to the mass ratio of the solid phase B in the dispersion is epichlorohydrin:diethylenetriamine:solid phase B=10-12g:20-25g:1g.

[0013] The present invention has the beneficial effects of: the putty powder prepared by the method has excellent water resistance and bonding strength, is not prone to peeling or cracking during use, and has excellent performance. Furthermore, the use of bentonite and attapulgite clay powders with high adsorption strength as raw materials gives the putty powder a strong adsorption capacity, enhancing its thermal insulation properties. Furthermore, the putty powder can absorb harmful pollutants in the air to a certain extent, which is healthy and environmentally friendly. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the embodiments.

[0015] Example 1

[0016] Disclosed is an environmentally friendly porous breathable putty powder, comprising raw materials including: Portland cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, and titanium dioxide powder-attapulgite clay powder, wherein the raw materials are calculated by weight as follows: 100 parts of Portland cement, 20 parts of modified bentonite, 20 parts of fine sand, 10 parts of talc, 6 parts of hydroxypropyl methylcellulose, and 5 parts of titanium dioxide powder-attapulgite clay powder; the raw materials (all of which are ball-milled and sieved through a 500-mesh sieve) are uniformly mixed to obtain the putty powder, wherein the preparation method of the modified bentonite is as follows:

[0017] (1) preparing an aqueous solution of dopamine hydrochloride; the concentration of dopamine hydrochloride in the aqueous solution of dopamine hydrochloride is 2 g / 200 mL, and the solvent is water; ball-milling natural bentonite and passing it through a 1000-mesh sieve; keeping the aqueous solution of dopamine hydrochloride constant at 75±3° C. in a water bath, and then soaking the sieved powder in the aqueous solution of dopamine hydrochloride, wherein the solid-liquid mass ratio of the sieved powder soaked in the aqueous solution of dopamine hydrochloride is solid / liquid=1:50; stirring the solution for 10 minutes, and then adding sodium hydroxide solution to the solution under stirring to adjust the pH of the solution to 8.5, wherein the concentration of sodium hydroxide in the sodium hydroxide solution is 0.1 mol / L, and the solvent is water; after the addition is completed, stirring and keeping the solution at 75±3° C. for 6 hours, and then air-cooling to room temperature, solid-liquid separation, washing the solid phase with deionized water twice, and drying to obtain solid phase A;

[0018] (2) preparing an acetic acid solution of chitosan, wherein the acetic acid solution of chitosan is prepared by dissolving chitosan in a 5 wt % acetic acid aqueous solution, and the mass ratio of chitosan to the acetic acid aqueous solution is chitosan: acetic acid aqueous solution = 2:100; adding the solid phase A to the acetic acid solution of chitosan in a nitrogen protective atmosphere, and the mass ratio of the solid phase A to the acetic acid solution of chitosan is solid phase A: chitosan acetic solution = 1:50; after the addition is completed, stirring the solution in a nitrogen protective atmosphere for 18 hours, and then separating the solid and liquid, and drying the solid phase at room temperature to obtain a solid phase B;

[0019] (3) The solid phase B is dispersed in N,N-dimethylformamide to form a dispersion, and the mass ratio of the solid phase B dispersed in N,N-dimethylformamide is solid phase B: N,N-dimethylformamide = 1:100; the dispersion is kept at a constant temperature of 80±3°C in a water bath, condensed and refluxed during the insulation process, and the dispersion is stirred for 5 minutes, and then epichlorohydrin is added to the dispersion under stirring. After the addition is completed, the dispersion is kept at 80±3°C, condensed and refluxed and stirred for 60 minutes, and then diethylenetriamine is added to the dispersion under stirring. The mass ratio of epichlorohydrin and diethylenetriamine added to the mass ratio of the solid phase B in the dispersion is epichlorohydrin: diethylenetriamine: solid phase B = 10g:20g:1g; after the addition is completed, the dispersion is kept at 80±3°C for 30 minutes, and then air-cooled to room temperature, solid-liquid separation is carried out, the solid phase is washed twice with ethanol, and dried to obtain the modified bentonite.

[0020] The preparation method of the titanium dioxide powder-attapulgite clay powder is as follows: preparing an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol (PEG-1000), wherein the mass percentage of tetrabutyl titanate in the ethanol solution of tetrabutyl titanate is 10%, and the solvent is ethanol; the mass percentage of polyethylene glycol in the aqueous solution of polyethylene glycol is 4%, and the solvent is water; the attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; stirring the ethanol solution of tetrabutyl titanate, adding glacial acetic acid to the solution under stirring, continuing to stir the solution for 30 minutes after the addition is completed, and then adding the aqueous solution of polyethylene glycol to the solution under stirring, adding glacial acetic acid and polyethylene glycol to the ethanol solution of tetrabutyl titanate; The volume ratio of the aqueous solution is ethanol solution of tetrabutyl titanate: glacial acetic acid: aqueous solution of polyethylene glycol = 100:3:30; after the addition is completed, the solution is continued to be stirred for 5 minutes, and then the sieved powder is added to the solution under stirring, and the mass ratio of the sieved powder added to the solution to the volume ratio of the ethanol solution of tetrabutyl titanate used is sieved powder: ethanol solution of tetrabutyl titanate = 6g:100mL; after the addition is completed, the solution is kept at a constant temperature of 85±3°C in a water bath and stirred for 10 minutes, air-cooled to room temperature, filtered to remove the liquid phase, and the solid phase is washed with deionized water three times, dried at 80°C for 10 minutes, and then calcined at 500°C for 50 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder-attapulgite clay powder.

[0021] Example 2

[0022] Disclosed is an environmentally friendly porous breathable putty powder, comprising raw materials including: Portland cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, and titanium dioxide powder-attapulgite clay powder, wherein the raw materials are calculated by weight as follows: 100 parts of Portland cement, 24 parts of modified bentonite, 25 parts of fine sand, 11 parts of talc, 7 parts of hydroxypropyl methylcellulose, and 8 parts of titanium dioxide powder-attapulgite clay powder; the raw materials (all of which are ball-milled and sieved through a 500-mesh sieve) are uniformly mixed to obtain the putty powder, wherein the preparation method of the modified bentonite is as follows:

[0023] (1) preparing an aqueous solution of dopamine hydrochloride; the concentration of dopamine hydrochloride in the aqueous solution of dopamine hydrochloride is 2 g / 200 mL, and the solvent is water; ball-milling natural bentonite and passing it through a 1000-mesh sieve; keeping the aqueous solution of dopamine hydrochloride constant at 75±3° C. in a water bath, and then soaking the sieved powder in the aqueous solution of dopamine hydrochloride, wherein the solid-liquid mass ratio of the sieved powder soaked in the aqueous solution of dopamine hydrochloride is solid / liquid=1:50; stirring the solution for 10 minutes, and then adding sodium hydroxide solution to the solution under stirring to adjust the pH of the solution to 8.5, wherein the concentration of sodium hydroxide in the sodium hydroxide solution is 0.1 mol / L, and the solvent is water; after the addition is completed, stirring and keeping the solution at 75±3° C. for 6 hours, and then air-cooling to room temperature, solid-liquid separation, washing the solid phase with deionized water twice, and drying to obtain solid phase A;

[0024] (2) preparing an acetic acid solution of chitosan, wherein the acetic acid solution of chitosan is prepared by dissolving chitosan in a 5 wt % acetic acid aqueous solution, and the mass ratio of chitosan to the acetic acid aqueous solution is chitosan: acetic acid aqueous solution = 2:100; adding the solid phase A to the acetic acid solution of chitosan in a nitrogen protective atmosphere, and the mass ratio of the solid phase A to the acetic acid solution of chitosan is solid phase A: chitosan acetic solution = 1:50; after the addition is completed, stirring the solution in a nitrogen protective atmosphere for 18 hours, and then separating the solid and liquid, and drying the solid phase at room temperature to obtain a solid phase B;

[0025] (3) The solid phase B is dispersed in N,N-dimethylformamide to form a dispersion, and the mass ratio of the solid phase B dispersed in N,N-dimethylformamide is solid phase B: N,N-dimethylformamide = 1:100; the dispersion is kept at a constant temperature of 80±3°C in a water bath, condensed and refluxed during the insulation process, and the dispersion is stirred for 5 minutes, and then epichlorohydrin is added to the dispersion under stirring. After the addition is completed, the dispersion is kept at 80±3°C, condensed and refluxed and stirred for 60 minutes, and then diethylenetriamine is added to the dispersion under stirring. The mass ratio of epichlorohydrin and diethylenetriamine added to the mass ratio of the solid phase B in the dispersion is epichlorohydrin: diethylenetriamine: solid phase B = 11g: 22g: 1g; after the addition is completed, the dispersion is kept at 80±3°C for 30 minutes, and then air-cooled to room temperature, solid-liquid separation is performed, the solid phase is washed twice with ethanol, and dried to obtain the modified bentonite.

[0026] The preparation method of the titanium dioxide powder-attapulgite clay powder is as follows: preparing an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol (PEG-1000), wherein the mass percentage of tetrabutyl titanate in the ethanol solution of tetrabutyl titanate is 12%, and the solvent is ethanol; the mass percentage of polyethylene glycol in the aqueous solution of polyethylene glycol is 5%, and the solvent is water; the attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; stirring the ethanol solution of tetrabutyl titanate, adding glacial acetic acid to the solution under stirring, continuing to stir the solution for 30 minutes after the addition is completed, and then adding the aqueous solution of polyethylene glycol to the solution under stirring, adding glacial acetic acid and polyethylene glycol to the ethanol solution of tetrabutyl titanate; The volume ratio of the aqueous solution is ethanol solution of tetrabutyl titanate: glacial acetic acid: aqueous solution of polyethylene glycol = 100:4:34; after the addition is completed, the solution is continued to be stirred for 5 minutes, and then the sieved powder is added to the solution under stirring, and the mass ratio of the sieved powder added to the solution to the volume ratio of the ethanol solution of tetrabutyl titanate used is sieved powder: ethanol solution of tetrabutyl titanate = 7g:100mL; after the addition is completed, the solution is kept at a constant temperature of 85±3°C in a water bath and stirred for 10 minutes, air-cooled to room temperature, filtered to remove the liquid phase, and the solid phase is washed with deionized water three times, dried at 80°C for 10 minutes, and then calcined at 500°C for 50 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder-attapulgite clay powder.

[0027] Example 3

[0028] Disclosed is an environmentally friendly porous breathable putty powder, comprising raw materials including: Portland cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, and titanium dioxide powder-attapulgite clay powder, wherein the raw materials are calculated by weight as follows: 100 parts of Portland cement, 26 parts of modified bentonite, 28 parts of fine sand, 11 parts of talc, 7 parts of hydroxypropyl methylcellulose, and 12 parts of titanium dioxide powder-attapulgite clay powder; the raw materials (all of which are ball-milled and sieved through a 500-mesh sieve) are uniformly mixed to obtain the putty powder, wherein the preparation method of the modified bentonite is as follows:

[0029] (1) preparing an aqueous solution of dopamine hydrochloride; the concentration of dopamine hydrochloride in the aqueous solution of dopamine hydrochloride is 3 g / 200 mL, and the solvent is water; ball-milling natural bentonite and passing it through a 1000-mesh sieve; keeping the aqueous solution of dopamine hydrochloride constant at 75±3° C. in a water bath, and then soaking the sieved powder in the aqueous solution of dopamine hydrochloride, wherein the solid-liquid mass ratio of the sieved powder soaked in the aqueous solution of dopamine hydrochloride is solid / liquid=1:50; stirring the solution for 10 minutes, and then adding sodium hydroxide solution to the solution under stirring to adjust the pH value of the solution to 8.5, wherein the concentration of sodium hydroxide in the sodium hydroxide solution is 0.1 mol / L, and the solvent is water; after the addition is completed, stirring and keeping the solution at 75±3° C. for 6 hours, and then air-cooling to room temperature, solid-liquid separation, and washing the solid phase with deionized water twice, drying, and obtaining solid phase A;

[0030] (2) preparing an acetic acid solution of chitosan, wherein the acetic acid solution of chitosan is prepared by dissolving chitosan in a 5 wt % acetic acid aqueous solution, and the mass ratio of chitosan to the acetic acid aqueous solution is chitosan: acetic acid aqueous solution = 2:100; adding the solid phase A to the acetic acid solution of chitosan in a nitrogen protective atmosphere, and the mass ratio of the solid phase A to the acetic acid solution of chitosan is solid phase A: chitosan acetic solution = 1:50; after the addition is completed, stirring the solution in a nitrogen protective atmosphere for 18 hours, and then separating the solid and liquid, and drying the solid phase at room temperature to obtain a solid phase B;

[0031] (3) The solid phase B is dispersed in N,N-dimethylformamide to form a dispersion, and the mass ratio of the solid phase B dispersed in N,N-dimethylformamide is solid phase B: N,N-dimethylformamide = 1:100; the dispersion is kept at a constant temperature of 80±3°C in a water bath, condensed and refluxed during the insulation process, and the dispersion is stirred for 5 minutes, and then epichlorohydrin is added to the dispersion under stirring. After the addition is completed, the dispersion is kept at 80±3°C, condensed and refluxed and stirred for 60 minutes, and then diethylenetriamine is added to the dispersion under stirring. The mass ratio of epichlorohydrin and diethylenetriamine added to the mass ratio of the solid phase B in the dispersion is epichlorohydrin: diethylenetriamine: solid phase B = 11g: 24g: 1g; after the addition is completed, the dispersion is kept at 80±3°C for 30 minutes, and then air-cooled to room temperature, solid-liquid separation is carried out, the solid phase is washed twice with ethanol, and dried to obtain the modified bentonite.

[0032] The preparation method of the titanium dioxide powder-attapulgite clay powder is as follows: preparing an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol (PEG-1000), wherein the mass percentage of tetrabutyl titanate in the ethanol solution of tetrabutyl titanate is 12%, and the solvent is ethanol; the mass percentage of polyethylene glycol in the aqueous solution of polyethylene glycol is 5%, and the solvent is water; the attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; stirring the ethanol solution of tetrabutyl titanate, adding glacial acetic acid to the solution under stirring, continuing to stir the solution for 30 minutes after the addition is completed, and then adding the aqueous solution of polyethylene glycol to the solution under stirring, adding glacial acetic acid and polyethylene glycol to the ethanol solution of tetrabutyl titanate; The volume ratio of the aqueous solution is ethanol solution of tetrabutyl titanate: glacial acetic acid: aqueous solution of polyethylene glycol = 100:4:38; after the addition is completed, the solution is continued to be stirred for 5 minutes, and then the sieved powder is added to the solution under stirring, and the mass ratio of the sieved powder added to the solution to the volume ratio of the ethanol solution of tetrabutyl titanate used is sieved powder: ethanol solution of tetrabutyl titanate = 8g:100mL; after the addition is completed, the solution is kept at a constant temperature of 85±3°C in a water bath and stirred for 10 minutes, air-cooled to room temperature, filtered to remove the liquid phase, and the solid phase is washed with deionized water three times, dried at 80°C for 10 minutes, and then calcined at 500°C for 50 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder-attapulgite clay powder.

[0033] Example 4

[0034] Disclosed is an environmentally friendly porous breathable putty powder, comprising raw materials including: Portland cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, and titanium dioxide powder-attapulgite clay powder, wherein the raw materials are calculated by weight as follows: 100 parts of Portland cement, 30 parts of modified bentonite, 30 parts of fine sand, 12 parts of talc, 8 parts of hydroxypropyl methylcellulose, and 16 parts of titanium dioxide powder-attapulgite clay powder; the raw materials (all of which are ball-milled and sieved through a 500-mesh sieve) are uniformly mixed to obtain the putty powder, wherein the preparation method of the modified bentonite is as follows:

[0035] (1) preparing an aqueous solution of dopamine hydrochloride; the concentration of dopamine hydrochloride in the aqueous solution of dopamine hydrochloride is 3 g / 200 mL, and the solvent is water; ball-milling natural bentonite and passing it through a 1000-mesh sieve; keeping the aqueous solution of dopamine hydrochloride constant at 75±3° C. in a water bath, and then soaking the sieved powder in the aqueous solution of dopamine hydrochloride, wherein the solid-liquid mass ratio of the sieved powder soaked in the aqueous solution of dopamine hydrochloride is solid / liquid=1:50; stirring the solution for 10 minutes, and then adding sodium hydroxide solution to the solution under stirring to adjust the pH value of the solution to 8.5, wherein the concentration of sodium hydroxide in the sodium hydroxide solution is 0.1 mol / L, and the solvent is water; after the addition is completed, stirring and keeping the solution at 75±3° C. for 6 hours, and then air-cooling to room temperature, solid-liquid separation, and washing the solid phase with deionized water twice, drying, and obtaining solid phase A;

[0036] (2) preparing an acetic acid solution of chitosan, wherein the acetic acid solution of chitosan is prepared by dissolving chitosan in a 5 wt % acetic acid aqueous solution, and the mass ratio of chitosan to the acetic acid aqueous solution is chitosan: acetic acid aqueous solution = 2:100; adding the solid phase A to the acetic acid solution of chitosan in a nitrogen protective atmosphere, and the mass ratio of the solid phase A to the acetic acid solution of chitosan is solid phase A: chitosan acetic solution = 1:50; after the addition is completed, stirring the solution in a nitrogen protective atmosphere for 18 hours, and then separating the solid and liquid, and drying the solid phase at room temperature to obtain a solid phase B;

[0037] (3) The solid phase B is dispersed in N,N-dimethylformamide to form a dispersion, and the mass ratio of the solid phase B dispersed in N,N-dimethylformamide is solid phase B: N,N-dimethylformamide = 1:100; the dispersion is kept at a constant temperature of 80±3°C in a water bath, condensed and refluxed during the insulation process, and the dispersion is stirred for 5 minutes, and then epichlorohydrin is added to the dispersion under stirring. After the addition is completed, the dispersion is kept at 80±3°C, condensed and refluxed and stirred for 60 minutes, and then diethylenetriamine is added to the dispersion under stirring. The mass ratio of epichlorohydrin and diethylenetriamine added to the mass ratio of the solid phase B in the dispersion is epichlorohydrin: diethylenetriamine: solid phase B = 12g: 25g: 1g; after the addition is completed, the dispersion is kept at 80±3°C for 30 minutes, and then air-cooled to room temperature, solid-liquid separation is carried out, the solid phase is washed twice with ethanol, and dried to obtain the modified bentonite.

[0038] The preparation method of the titanium dioxide powder-attapulgite clay powder is as follows: preparing an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol (PEG-1000), wherein the mass percentage of tetrabutyl titanate in the ethanol solution of tetrabutyl titanate is 15%, and the solvent is ethanol; the mass percentage of polyethylene glycol in the aqueous solution of polyethylene glycol is 6%, and the solvent is water; the attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; stirring the ethanol solution of tetrabutyl titanate, adding glacial acetic acid to the solution under stirring, continuing to stir the solution for 30 minutes after the addition is completed, and then adding the aqueous solution of polyethylene glycol to the solution under stirring, adding glacial acetic acid and polyethylene glycol to the ethanol solution of tetrabutyl titanate; The volume ratio of the aqueous solution is ethanol solution of tetrabutyl titanate: glacial acetic acid: aqueous solution of polyethylene glycol = 100:5:40; after the addition is completed, the solution is continued to be stirred for 5 minutes, and then the sieved powder is added to the solution under stirring, and the mass ratio of the sieved powder added to the solution to the volume ratio of the ethanol solution of tetrabutyl titanate used is sieved powder: ethanol solution of tetrabutyl titanate = 9g:100mL; after the addition is completed, the solution is kept at a constant temperature of 85±3°C in a water bath and stirred for 10 minutes, air-cooled to room temperature, filtered to remove the liquid phase, and the solid phase is washed with deionized water three times, dried at 80°C for 10 minutes, and then calcined at 500°C for 50 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder-attapulgite clay powder.

[0039] Comparative Example 1

[0040] A putty powder for comparison comprises raw materials including: Portland cement, bentonite, fine sand, talc, hydroxypropyl methylcellulose, and titanium dioxide powder-attapulgite clay powder, wherein the raw materials are calculated as follows by weight: 100 parts of Portland cement, 26 parts of bentonite, 28 parts of fine sand, 11 parts of talc, 7 parts of hydroxypropyl methylcellulose, and 12 parts of titanium dioxide powder-attapulgite clay powder; the raw materials (all of which are sieved powders after ball milling and passing through a 500-mesh sieve) are uniformly mixed to obtain the putty powder.

[0041] The preparation method of the titanium dioxide powder-attapulgite clay powder is as follows: preparing an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol (PEG-1000), wherein the mass percentage of tetrabutyl titanate in the ethanol solution of tetrabutyl titanate is 12%, and the solvent is ethanol; the mass percentage of polyethylene glycol in the aqueous solution of polyethylene glycol is 5%, and the solvent is water; the attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; stirring the ethanol solution of tetrabutyl titanate, adding glacial acetic acid to the solution under stirring, continuing to stir the solution for 30 minutes after the addition is completed, and then adding the aqueous solution of polyethylene glycol to the solution under stirring, adding glacial acetic acid and polyethylene glycol to the ethanol solution of tetrabutyl titanate; The volume ratio of the aqueous solution is ethanol solution of tetrabutyl titanate: glacial acetic acid: aqueous solution of polyethylene glycol = 100:4:38; after the addition is completed, the solution is continued to be stirred for 5 minutes, and then the sieved powder is added to the solution under stirring, and the mass ratio of the sieved powder added to the solution to the volume ratio of the ethanol solution of tetrabutyl titanate used is sieved powder: ethanol solution of tetrabutyl titanate = 8g:100mL; after the addition is completed, the solution is kept at a constant temperature of 85±3°C in a water bath and stirred for 10 minutes, air-cooled to room temperature, filtered to remove the liquid phase, and the solid phase is washed with deionized water three times, dried at 80°C for 10 minutes, and then calcined at 500°C for 50 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder-attapulgite clay powder.

[0042] Comparative Example 2

[0043] A putty powder for comparison, the raw materials include: silicate cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, titanium dioxide powder-attapulgite clay powder, each of the raw materials in parts by weight: 100 parts silicate cement, 26 parts modified bentonite, 28 parts fine sand, 11 parts talc, 7 parts hydroxypropyl methylcellulose, titanium dioxide powder-attapulgite clay powder 12 parts; the raw materials (all of which are sieved powders after ball milling and passing through a 500-mesh sieve) are mixed uniformly to obtain the putty powder, wherein the preparation method of the modified bentonite is:

[0044] (1) After ball milling, natural bentonite was passed through a 1000-mesh sieve, and the sieved powder was collected as the solid phase A of this comparative example;

[0045] (2) preparing an acetic acid solution of chitosan, wherein the acetic acid solution of chitosan is prepared by dissolving chitosan in a 5 wt % acetic acid aqueous solution, and the mass ratio of chitosan to the acetic acid aqueous solution is chitosan: acetic acid aqueous solution = 2:100; adding the solid phase A to the acetic acid solution of chitosan in a nitrogen protective atmosphere, and the mass ratio of the solid phase A to the acetic acid solution of chitosan is solid phase A: chitosan acetic solution = 1:50; after the addition is completed, stirring the solution in a nitrogen protective atmosphere for 18 hours, and then separating the solid and liquid, and drying the solid phase at room temperature to obtain a solid phase B;

[0046] (3) The solid phase B is dispersed in N,N-dimethylformamide to form a dispersion, and the mass ratio of the solid phase B dispersed in N,N-dimethylformamide is solid phase B: N,N-dimethylformamide = 1:100; the dispersion is kept at a constant temperature of 80±3°C in a water bath, condensed and refluxed during the insulation process, and the dispersion is stirred for 5 minutes, and then epichlorohydrin is added to the dispersion under stirring. After the addition is completed, the dispersion is kept at 80±3°C, condensed and refluxed and stirred for 60 minutes, and then diethylenetriamine is added to the dispersion under stirring. The mass ratio of epichlorohydrin and diethylenetriamine added to the mass ratio of the solid phase B in the dispersion is epichlorohydrin: diethylenetriamine: solid phase B = 11g: 24g: 1g; after the addition is completed, the dispersion is kept at 80±3°C for 30 minutes, and then air-cooled to room temperature, solid-liquid separation is carried out, the solid phase is washed twice with ethanol, and dried to obtain the modified bentonite.

[0047] The preparation method of the titanium dioxide powder-attapulgite clay powder is as follows: preparing an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol (PEG-1000), wherein the mass percentage of tetrabutyl titanate in the ethanol solution of tetrabutyl titanate is 12%, and the solvent is ethanol; the mass percentage of polyethylene glycol in the aqueous solution of polyethylene glycol is 5%, and the solvent is water; the attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; stirring the ethanol solution of tetrabutyl titanate, adding glacial acetic acid to the solution under stirring, continuing to stir the solution for 30 minutes after the addition is completed, and then adding the aqueous solution of polyethylene glycol to the solution under stirring, adding glacial acetic acid and polyethylene glycol to the ethanol solution of tetrabutyl titanate; The volume ratio of the aqueous solution is ethanol solution of tetrabutyl titanate: glacial acetic acid: aqueous solution of polyethylene glycol = 100:4:38; after the addition is completed, the solution is continued to be stirred for 5 minutes, and then the sieved powder is added to the solution under stirring, and the mass ratio of the sieved powder added to the solution to the volume ratio of the ethanol solution of tetrabutyl titanate used is sieved powder: ethanol solution of tetrabutyl titanate = 8g:100mL; after the addition is completed, the solution is kept at a constant temperature of 85±3°C in a water bath and stirred for 10 minutes, air-cooled to room temperature, filtered to remove the liquid phase, and the solid phase is washed with deionized water three times, dried at 80°C for 10 minutes, and then calcined at 500°C for 50 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder-attapulgite clay powder.

[0048] Comparative Example 3

[0049] A putty powder for comparison, the raw materials include: silicate cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, titanium dioxide powder-attapulgite clay powder, each of the raw materials in parts by weight: 100 parts silicate cement, 26 parts modified bentonite, 28 parts fine sand, 11 parts talc, 7 parts hydroxypropyl methylcellulose, titanium dioxide powder-attapulgite clay powder 12 parts; the raw materials (all of which are sieved powders after ball milling and passing through a 500-mesh sieve) are mixed uniformly to obtain the putty powder, wherein the preparation method of the modified bentonite is:

[0050] (1) preparing an aqueous solution of dopamine hydrochloride; the concentration of dopamine hydrochloride in the aqueous solution of dopamine hydrochloride is 3 g / 200 mL, and the solvent is water; ball-milling natural bentonite and passing it through a 1000-mesh sieve; keeping the aqueous solution of dopamine hydrochloride constant at 75±3° C. in a water bath, and then soaking the sieved powder in the aqueous solution of dopamine hydrochloride, wherein the solid-liquid mass ratio of the sieved powder soaked in the aqueous solution of dopamine hydrochloride is solid / liquid=1:50; stirring the solution for 10 minutes, and then adding sodium hydroxide solution to the solution under stirring to adjust the pH value of the solution to 8.5, wherein the concentration of sodium hydroxide in the sodium hydroxide solution is 0.1 mol / L, and the solvent is water; after the addition is completed, stirring and keeping the solution at 75±3° C. for 6 hours, and then air-cooling to room temperature, solid-liquid separation, and washing the solid phase with deionized water twice, drying, and obtaining solid phase A;

[0051] (2) preparing an acetic acid solution of chitosan, wherein the acetic acid solution of chitosan is prepared by dissolving chitosan in a 5 wt % acetic acid aqueous solution, and the mass ratio of chitosan to the acetic acid aqueous solution is chitosan: acetic acid aqueous solution = 2:100; adding the solid phase A to the acetic acid solution of chitosan in a nitrogen protective atmosphere, and the mass ratio of the solid phase A added to the acetic acid solution of chitosan is solid phase A: chitosan acetic acid solution = 1:50; after the addition is completed, stirring the solution in a nitrogen protective atmosphere for 18 hours, and then separating the solid and liquid, and drying the solid phase at room temperature to obtain solid phase B as the modified bentonite of this comparative example.

[0052] The preparation method of the titanium dioxide powder-attapulgite clay powder is as follows: preparing an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol (PEG-1000), wherein the mass percentage of tetrabutyl titanate in the ethanol solution of tetrabutyl titanate is 12%, and the solvent is ethanol; the mass percentage of polyethylene glycol in the aqueous solution of polyethylene glycol is 5%, and the solvent is water; the attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; stirring the ethanol solution of tetrabutyl titanate, adding glacial acetic acid to the solution under stirring, continuing to stir the solution for 30 minutes after the addition is completed, and then adding the aqueous solution of polyethylene glycol to the solution under stirring, adding glacial acetic acid and polyethylene glycol to the ethanol solution of tetrabutyl titanate; The volume ratio of the aqueous solution is ethanol solution of tetrabutyl titanate: glacial acetic acid: aqueous solution of polyethylene glycol = 100:4:38; after the addition is completed, the solution is continued to be stirred for 5 minutes, and then the sieved powder is added to the solution under stirring, and the mass ratio of the sieved powder added to the solution to the volume ratio of the ethanol solution of tetrabutyl titanate used is sieved powder: ethanol solution of tetrabutyl titanate = 8g:100mL; after the addition is completed, the solution is kept at a constant temperature of 85±3°C in a water bath and stirred for 10 minutes, air-cooled to room temperature, filtered to remove the liquid phase, and the solid phase is washed with deionized water three times, dried at 80°C for 10 minutes, and then calcined at 500°C for 50 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder-attapulgite clay powder.

[0053] Comparative Example 4

[0054] A putty powder for comparison comprises raw materials including: Portland cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, and titanium dioxide powder, wherein the raw materials are calculated by weight as follows: 100 parts of Portland cement, 26 parts of modified bentonite, 28 parts of fine sand, 11 parts of talc, 7 parts of hydroxypropyl methylcellulose, and 12 parts of titanium dioxide powder; the raw materials (all of which are sieved powders after ball milling and passing through a 500-mesh sieve) are mixed uniformly to obtain the putty powder, wherein the preparation method of the modified bentonite is as follows:

[0055] (1) preparing an aqueous solution of dopamine hydrochloride; the concentration of dopamine hydrochloride in the aqueous solution of dopamine hydrochloride is 3 g / 200 mL, and the solvent is water; ball-milling natural bentonite and passing it through a 1000-mesh sieve; keeping the aqueous solution of dopamine hydrochloride constant at 75±3° C. in a water bath, and then soaking the sieved powder in the aqueous solution of dopamine hydrochloride, wherein the solid-liquid mass ratio of the sieved powder soaked in the aqueous solution of dopamine hydrochloride is solid / liquid=1:50; stirring the solution for 10 minutes, and then adding sodium hydroxide solution to the solution under stirring to adjust the pH value of the solution to 8.5, wherein the concentration of sodium hydroxide in the sodium hydroxide solution is 0.1 mol / L, and the solvent is water; after the addition is completed, stirring and keeping the solution at 75±3° C. for 6 hours, and then air-cooling to room temperature, solid-liquid separation, and washing the solid phase with deionized water twice, drying, and obtaining solid phase A;

[0056] (2) preparing an acetic acid solution of chitosan, wherein the acetic acid solution of chitosan is prepared by dissolving chitosan in a 5 wt % acetic acid aqueous solution, and the mass ratio of chitosan to the acetic acid aqueous solution is chitosan: acetic acid aqueous solution = 2:100; adding the solid phase A to the acetic acid solution of chitosan in a nitrogen protective atmosphere, and the mass ratio of the solid phase A to the acetic acid solution of chitosan is solid phase A: chitosan acetic solution = 1:50; after the addition is completed, stirring the solution in a nitrogen protective atmosphere for 18 hours, and then separating the solid and liquid, and drying the solid phase at room temperature to obtain a solid phase B;

[0057] (3) The solid phase B is dispersed in N,N-dimethylformamide to form a dispersion, and the mass ratio of the solid phase B dispersed in N,N-dimethylformamide is solid phase B: N,N-dimethylformamide = 1:100; the dispersion is kept at a constant temperature of 80±3°C in a water bath, condensed and refluxed during the insulation process, and the dispersion is stirred for 5 minutes, and then epichlorohydrin is added to the dispersion under stirring. After the addition is completed, the dispersion is kept at 80±3°C, condensed and refluxed and stirred for 60 minutes, and then diethylenetriamine is added to the dispersion under stirring. The mass ratio of epichlorohydrin and diethylenetriamine added to the mass ratio of the solid phase B in the dispersion is epichlorohydrin: diethylenetriamine: solid phase B = 11g: 24g: 1g; after the addition is completed, the dispersion is kept at 80±3°C for 30 minutes, and then air-cooled to room temperature, solid-liquid separation is carried out, the solid phase is washed twice with ethanol, and dried to obtain the modified bentonite.

[0058] The titanium dioxide powder is prepared by: preparing an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol (PEG-1000), wherein the mass percentage of tetrabutyl titanate in the ethanol solution is 12% and the solvent is ethanol; the mass percentage of polyethylene glycol in the aqueous solution is 5% and the solvent is water; attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; stirring the ethanol solution of tetrabutyl titanate, adding glacial acetic acid to the solution under stirring, and continuing to stir the solution for 30 minutes after the addition is completed. in, and then the polyethylene glycol aqueous solution is added to the solution under stirring, and glacial acetic acid and the polyethylene glycol aqueous solution are added to the tetrabutyl titanate ethanol solution in a volume ratio of tetrabutyl titanate ethanol solution: glacial acetic acid: polyethylene glycol aqueous solution = 100:4:38; after the addition is completed, the solution is continued to be stirred for 15 minutes, air-cooled to room temperature, filtered to remove the liquid phase, and the solid phase is washed 3 times with deionized water, dried at 80°C for 10 minutes, and then calcined at 500°C for 50 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder.

[0059] Example 5

[0060] The properties of the putty powders prepared by the methods described in the above embodiments and comparative examples were tested in accordance with the requirements of standard JG / T298-2010, and the results are shown in Table 1.

[0061] Table 1

[0062]

[0063]

[0064] As shown in Table 1, the putty powder prepared by the method of the present invention has good water resistance and bonding strength, is not prone to peeling or cracking during use, and has excellent performance. Furthermore, the use of bentonite and attapulgite clay powders with high adsorption strength as raw materials gives the putty powder a strong adsorption capacity, improving its thermal insulation effect. It can also absorb harmful pollutants in the air to a certain extent, which is healthy and environmentally friendly.

[0065] The technical solutions provided by the present invention are described in detail above. For those skilled in the art, according to the ideas of the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. An environmentally friendly porous breathable putty powder, characterized in that, The raw materials include: silicate cement, modified bentonite, fine sand, talc, hydroxypropyl methylcellulose, titanium dioxide powder-attapulgite clay powder, and the raw materials are calculated by weight as follows: 100 parts of silicate cement, 20-30 parts of modified bentonite, 20-30 parts of fine sand, 10-12 parts of talc, 6-8 parts of hydroxypropyl methylcellulose, and 5-16 parts of titanium dioxide powder-attapulgite clay powder; the preparation method of the modified bentonite is: (1) preparing an aqueous solution of dopamine hydrochloride; ball-milling natural bentonite and passing it through a 1000-mesh sieve; keeping the aqueous solution of dopamine hydrochloride constant at 75±3°C in a water bath, then immersing the sieved powder in the aqueous solution of dopamine hydrochloride, stirring the solution for 10 to 20 minutes, then adding sodium hydroxide solution to the solution under stirring to adjust the pH of the solution to 8.5, stirring and keeping the solution at 75±3°C for more than 6 hours after the addition is completed, then air-cooling to room temperature, solid-liquid separation, washing the solid phase with deionized water for more than 2 times, and drying to obtain solid phase A; (2) preparing an acetic acid solution of chitosan, adding the solid phase A to the acetic acid solution of chitosan in a nitrogen atmosphere, stirring the solution for more than 18 hours in a nitrogen atmosphere after the addition is completed, and then separating the solid and liquid, and drying the solid phase at room temperature to obtain a solid phase B; (3) The solid phase B is dispersed in N,N-dimethylformamide to form a dispersion, the dispersion is kept at a constant temperature of 80±3°C in a water bath, condensed and refluxed during the insulation process, and the dispersion is stirred for 5 minutes, and then epichlorohydrin is added to the dispersion under stirring, and after the addition is completed, the dispersion is kept at 80±3°C, condensed and refluxed and stirred for 60-70 minutes, and then diethylenetriamine is added to the dispersion under stirring, and after the addition is completed, the dispersion is kept at 80±3°C for 30-40 minutes, and then air-cooled to room temperature, solid-liquid separation is performed, the solid phase is washed with ethanol for more than 2 times, and dried to obtain the modified bentonite; The preparation method of the titanium dioxide powder-attapulgite clay powder is as follows: an ethanol solution of tetrabutyl titanate and an aqueous solution of polyethylene glycol are prepared, and the attapulgite clay powder is passed through a 1000-mesh sieve to obtain a sieved powder; the ethanol solution of tetrabutyl titanate is stirred, glacial acetic acid is added to the solution under stirring, the solution is stirred for more than 30 minutes after the addition is completed, and then the aqueous solution of polyethylene glycol is added to the solution under stirring, the solution is stirred for more than 5 minutes after the addition is completed, and then the sieved powder is added to the solution under stirring, after the addition is completed, the solution is kept at a constant temperature of 85±3°C in a water bath and stirred for 10-15 minutes, air-cooled to room temperature, filtered to remove the liquid phase, the solid phase is washed with deionized water for more than 3 times, dried at 80°C for 10 minutes, and then calcined at 500°C for 50-60 minutes, and air-cooled to room temperature to obtain the titanium dioxide powder-attapulgite clay powder.

2. The environmentally friendly porous breathable putty powder according to claim 1, characterized in that: In the ethanol solution of tetrabutyl titanate, the mass percentage of tetrabutyl titanate is 10% to 15%, and the solvent is ethanol; in the aqueous solution of polyethylene glycol, the mass percentage of polyethylene glycol is 4% to 6%, and the solvent is water; glacial acetic acid and the aqueous solution of polyethylene glycol are added to the ethanol solution of tetrabutyl titanate in a volume ratio of tetrabutyl titanate ethanol solution: glacial acetic acid: polyethylene glycol aqueous solution = 100:3-5:30-40; and the volume ratio of the sieved powder added to the solution to the tetrabutyl titanate ethanol solution used is sieved powder: tetrabutyl titanate ethanol solution = 6-9 g: 100 mL.

3. The environmentally friendly porous breathable putty powder according to claim 1, characterized in that: In the step (1), the concentration of dopamine hydrochloride in the aqueous solution of dopamine hydrochloride is 2-3 g / 200 mL, and the solvent is water; the solid-liquid mass ratio of the sieved powder soaked in the aqueous solution of dopamine hydrochloride is solid / liquid=1:50; the concentration of sodium hydroxide in the sodium hydroxide solution is 0.1 mol / L, and the solvent is water.

4. The environmentally friendly porous breathable putty powder according to claim 1, characterized in that: In the step (2), the chitosan acetic acid solution is prepared by dissolving chitosan in a 5wt% acetic acid aqueous solution, and the mass ratio of chitosan to the acetic acid aqueous solution is chitosan: acetic acid aqueous solution = 2 to 3:100; the mass ratio of the solid phase A added to the chitosan acetic acid solution is solid phase A: chitosan acetic acid solution = 1:

50.

5. The environmentally friendly porous breathable putty powder according to claim 1, characterized in that: In the step (3), the mass ratio of the solid phase B dispersed in N,N-dimethylformamide is solid phase B:N,N-dimethylformamide=1:100; the mass ratio of epichlorohydrin and diethylenetriamine added to the mass ratio of the solid phase B in the dispersion is epichlorohydrin:diethylenetriamine:solid phase B=10-12g:20-25g:1g.

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