CN113698818A - Self-fading wallpaper base film convenient for construction and preparation method thereof - Google Patents
Self-fading wallpaper base film convenient for construction and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a self-fading type wallpaper basement membrane convenient for construction and a preparation method thereof, wherein a chromogenic substance is prepared into a chromogenic solution, then the chromogenic solution is slowly dripped into a polymer emulsion, and is uniformly stirred, an auxiliary agent is added, and the self-fading type wallpaper basement membrane convenient for construction is obtained by uniformly stirring; wherein the chromogenic substance is selected from any one of 1-naphtholphthalein, thymolphthalein, m-nitrotoluene or p-nitrotoluene. The wallpaper base film disclosed by the invention has a color during construction, and the color disappears after the construction is finished, so that the occurrence of a brush leakage phenomenon is reduced, the construction difficulty is greatly reduced, and the construction effect is ensured. The wallpaper base film decoloration speed is high, complete decoloration can be realized within 2 hours, and the construction convenience is greatly improved.
Description
Technical Field
The invention relates to a wallpaper base film, in particular to a self-fading wallpaper base film convenient for construction and a preparation method thereof. Belongs to the technical field of wallpaper auxiliary materials.
Background
The wallpaper base film is a professional alkali-resistant, damp-proof and mildew-proof wall surface treatment material, can effectively prevent moisture and alkaline substances of a construction base surface from seeping outwards, and avoids bad damages such as moisture regain, mildew and blackening and the like of wallpaper. The wallpaper is matched with a wallpaper base film for use, is a common home decoration method, can be matched with different decoration styles by wallpapers with various colors and texture patterns, and is quite popular with people.
The application method of the wallpaper base film is simple, the base film is uniformly coated on the wall surface in a rolling mode by using a roller for rolling the coating, and the wallpaper can be pasted after the wallpaper base film is dried.
The main component of the wallpaper base film is a high molecular resin material, so that the requirements of high strength performance and high elasticity performance are difficult to achieve simultaneously, namely, the mechanical strength, hardness and the like of the wallpaper base film are improved, and meanwhile, the performances of elasticity, impact resistance, film forming property, initial adhesion and the like of the wallpaper base film are inevitably reduced.
In addition, the existing wallpaper base film is basically transparent, visual identification is difficult, the problem of brush leakage is easy to occur during construction, and the construction effect is influenced.
Patent CN1039337351B discloses a wallpaper basement membrane, which is prepared from inorganic nanometer mildew-proof powder, tourmaline powder, a hardening agent, an acid-base control agent, an odor-free emulsion, a dispersing agent and the like as raw materials, and emphasizes on the penetration of the wallpaper basement membrane into a wall body and solves the problem of wall surface pulverization. But the hardness and the impact resistance of the wallpaper base film are poor, and the problem that the wallpaper base film is easy to miss brushing in construction cannot be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the self-fading wallpaper base film convenient for construction and the preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
preparing a developing solution from a developing substance, slowly dripping the developing solution into the macromolecular emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain the self-fading type wallpaper basement membrane convenient for construction; wherein the chromogenic substance is any one of 1-naphtholphthalein, thymolphthalein, m-nitrotoluene or p-nitrotoluene; adding a nano material into the chromogenic solution to realize the loading of the chromogenic substance, wherein the nano material is prepared by the following method: firstly, compounding the nano-rod crystalline attapulgite with the aminated starch nano-particles to obtain composite particles, and then reacting the composite particles with p-aldehyde benzoic acid to obtain the nano-composite material.
Preferably, the mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 300-320: 0.4 to 0.6.
Preferably, the auxiliary agent comprises the following components in parts by weight: 1 part of film-forming assistant, 0.3-0.5 part of thickening agent, 0.02-0.03 part of bactericide and 0.02-0.03 part of defoaming agent.
Further preferably, the film-forming assistant is propylene glycol butyl ether or propylene glycol methyl ether acetate; the thickener is hydroxyethyl cellulose, a polyurethane thickener, an alkali swelling thickener or an associative alkali swelling thickener; the bactericide is selected from any one of isothiazolinone, potassium sorbate, sodium phenylpropionate or phycocyanin; the defoaming agent is any one of polyether defoaming agent or organic silicon defoaming agent.
Preferably, the chromogenic substance is 1-naphtholphthalein or thymolphthalein, the corresponding polymer emulsion is styrene-acrylic emulsion, and the preparation method of the chromogenic solution comprises the following steps in parts by weight: firstly, adding 1 part of chromogenic substance into 95-105 parts of 10-12% sodium hydroxide solution by mass concentration, heating to 45-55 ℃, and stirring for 50-70 minutes under heat preservation to obtain the chromogenic solution (blue); and adjusting the pH value of the system to 11-12 before adding the auxiliary agent.
Preferably, the chromogenic substance is m-nitrotoluene or p-nitrotoluene, the corresponding polymer emulsion is any one of acrylic emulsion, vinyl acetate-ethylene copolymer emulsion or polyvinyl alcohol emulsion, and the preparation method of the chromogenic solution comprises the following steps in parts by weight: firstly, adding 1 part of color developing substance into 30-40 parts of absolute ethyl alcohol, and carrying out ultrasonic oscillation for 20-30 minutes to obtain the color developing solution (yellow).
Preferably, the amount of the nano material is 2-3 times of the weight of the chromogenic substance.
Preferably, the preparation method of the composite particles comprises the following steps in parts by weight:
(A) firstly, adding 0.01-0.02 part of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane into 1 part of dimethyl sulfoxide, then adding 0.1-0.2 part of water, stirring and heating to 85-95 ℃;
(B) then adding 0.01-0.02 part of starch while stirring, preserving heat, stirring for 80-90 minutes, and naturally cooling to room temperature to obtain a starch solution;
(C) and then adding 0.1-0.2 part of nanorod crystal attapulgite into the starch solution, uniformly stirring and dispersing, dropwise adding 5-6 parts of absolute ethyl alcohol, continuously stirring for 30-40 minutes after dropwise adding, ultrasonically oscillating for 50-60 minutes, centrifuging, washing with ethanol, and drying to obtain the composite particles.
Further preferably, in the step (B), the starch is selected from any one of corn starch, potato starch or sweet potato starch.
Preferably, the nanorod crystal attapulgite is prepared by the following method in parts by weight: adding 1 part of attapulgite into 1.5-2 parts of water by weight, extruding the mixture for 2-3 times by using a roller, transferring the mixture into a pressure-resistant closed container with a rapid pressure relief device, heating the mixture in a closed manner to 175-185 ℃, preserving the temperature for 50-70 minutes, rapidly relieving the pressure to normal pressure, spreading the mixture out, and naturally drying the mixture to obtain the nanorod crystal attapulgite.
Preferably, the preparation method of the nano material comprises the following steps of: adding 1 part of p-aldehyde benzoic acid into 5-7 parts of N, N-dimethylformamide, then adding 0.2-0.3 part of 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride and 0.15-0.25 part of N-hydroxy thiosuccinimide, ultrasonically dispersing uniformly, then adding 2-3 parts of composite particles, stirring and reacting for 22-24 hours, removing the N, N-dimethylformamide, washing, and drying to obtain the nano material.
The self-fading wallpaper base film convenient for construction is obtained by the preparation method.
The invention has the beneficial effects that:
firstly, preparing a color developing substance into a color developing solution, then slowly dripping the color developing solution into a polymer emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain a self-fading wallpaper base film convenient for construction; wherein the chromogenic substance is selected from any one of 1-naphtholphthalein, thymolphthalein, m-nitrotoluene or p-nitrotoluene. The wallpaper base film disclosed by the invention has a color during construction, and the color disappears after the construction is finished, so that the occurrence of a brush leakage phenomenon is reduced, the construction difficulty is greatly reduced, and the construction effect is ensured. The wallpaper base film decoloration speed is high, complete decoloration can be realized within 2 hours, and the construction convenience is greatly improved.
The working principle of the invention is that unstable chromogenic substances such as 1-naphtholphthalein, thymolphthalein, m-nitrotoluene or p-nitrotoluene and the like are used, so that the wallpaper basement membrane product has color, and the construction progress can be conveniently and visually observed during construction. Unstable color developing substances in the wallpaper base film can disappear automatically after construction, complete disappearance of colors is realized, and the wallpaper pasting effect is not influenced.
The nanometer material is added into the color developing solution to realize the loading of the color developing substance, on one hand, the nanometer material plays a role in loading the color developing substance, so that the color is brighter, the visual discrimination is convenient during construction, and the larger specific surface area of the nanometer material is favorable for the contact area of the color developing substance and the environment after construction, thereby greatly accelerating the color reducing speed; on the other hand, the nano material has a reinforcing effect, and the hardness and the impact resistance of the wallpaper base film are greatly improved.
The nano material is prepared by the following method: firstly, compounding the nano-rod crystalline attapulgite with the aminated starch nano-particles to obtain composite particles, and then reacting the composite particles with p-aldehyde benzoic acid to obtain the nano-composite material. The nano-rod crystal attapulgite is of a rod-shaped structure and has a large specific surface area, and the aminated starch nano-particles can be deposited on the surface of the nano-rod crystal attapulgite, so that the specific surface area is further increased, and amino groups are introduced. The amino can react with p-aldehyde benzoic acid, so that the surface modification of the aminated starch nanoparticles is realized, the specific surface area is further increased, the decoloring speed is further increased, and the hardness and the impact resistance of the wallpaper base film are improved.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples. It is to be understood that the practice of the invention is not limited to the following examples, and that any variations and/or modifications may be made thereto without departing from the scope of the invention.
In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified. The reagents used in the following examples, unless otherwise specified, were purchased from conventional biochemical reagent stores.
Example 1:
preparing a developing solution from a developing substance, slowly dripping the developing solution into the macromolecular emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain the self-fading type wallpaper basement membrane convenient for construction; adding a nano material into the chromogenic solution to realize the loading of the chromogenic substance, wherein the nano material is prepared by the following method: firstly, compounding the nano-rod crystalline attapulgite with the aminated starch nano-particles to obtain composite particles, and then reacting the composite particles with p-aldehyde benzoic acid to obtain the nano-composite material.
The mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 300: 0.6.
the auxiliary agent comprises: 1kg of film-forming assistant, 0.3kg of thickening agent, 0.03kg of bactericide and 0.02kg of defoaming agent.
The film-forming auxiliary agent is propylene glycol butyl ether; the thickening agent is hydroxyethyl cellulose; the bactericide is potassium sorbate; the defoaming agent is polyether defoaming agent.
The chromogenic substance is 1-naphtholphthalein, the corresponding polymer emulsion is styrene-acrylic emulsion, and the preparation method of the chromogenic solution is as follows: firstly, adding 1kg of chromogenic substance into 105kg of 10% sodium hydroxide solution with mass concentration, heating to 55 ℃, and stirring for 50 minutes under the condition of heat preservation to obtain the chromogenic solution (blue); the system pH was adjusted to 11 before addition of the adjuvant.
The dosage of the nano material is 3 times of the weight of the chromogenic substance.
The preparation method of the composite particles comprises the following steps:
(A) 0.01kg of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane is added to 1kg of dimethyl sulfoxide, then 0.2kg of water is added, and the mixture is stirred and heated to 85 ℃;
(B) then adding 0.02kg of corn starch while stirring, keeping the temperature and stirring for 80 minutes, and naturally cooling to room temperature to obtain a starch solution;
(C) and then adding 0.1kg of nanorod crystal attapulgite into the starch solution, uniformly stirring and dispersing, dropwise adding 6kg of absolute ethyl alcohol, continuously stirring for 30 minutes after dropwise adding, ultrasonically oscillating for 60 minutes, centrifuging, washing with ethanol, and drying to obtain the composite particles.
The nanorod crystal attapulgite is prepared by the following method: adding 1kg of attapulgite into 1.5kg of water, extruding the mixture for 3 times by using a roller, transferring the mixture into a pressure-resistant closed container with a rapid pressure relief device, heating the mixture to 175 ℃ in a closed manner, preserving the temperature for 70 minutes, rapidly relieving the pressure to normal pressure, spreading the mixture, and naturally drying the mixture to obtain the nanorod crystal attapulgite.
The preparation method of the nano material comprises the following steps: adding 1kg of p-aldehyde benzoic acid into 5kg of N, N-dimethylformamide, then adding 0.3kg of 1- (3-dimethylaminopropyl) -3-ethyl carbodiimide hydrochloride and 0.15kg of N-hydroxy thiosuccinimide, dispersing uniformly by ultrasonic waves, then adding 3kg of composite particles, stirring for reacting for 22 hours, removing the N, N-dimethylformamide, washing and drying to obtain the nano material.
Example 2:
preparing a developing solution from a developing substance, slowly dripping the developing solution into the macromolecular emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain the self-fading type wallpaper basement membrane convenient for construction; adding a nano material into the chromogenic solution to realize the loading of the chromogenic substance, wherein the nano material is prepared by the following method: firstly, compounding the nano-rod crystalline attapulgite with the aminated starch nano-particles to obtain composite particles, and then reacting the composite particles with p-aldehyde benzoic acid to obtain the nano-composite material.
The mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 320: 0.4.
the auxiliary agent comprises: 1kg of film-forming assistant, 0.5kg of thickening agent, 0.02kg of bactericide and 0.03kg of defoaming agent.
The film-forming auxiliary agent is propylene glycol methyl ether acetate; the thickener is polyurethane thickener; the bactericide is sodium phenylpropionate; the defoaming agent is an organic silicon defoaming agent.
The chromogenic substance is m-nitrotoluene, the corresponding polymer emulsion is vinyl acetate-ethylene copolymer emulsion, and the preparation method of the chromogenic solution is as follows: firstly, adding 1kg of chromogenic substance into 30kg of absolute ethyl alcohol, and carrying out ultrasonic oscillation for 30 minutes to obtain the chromogenic solution (yellow).
The dosage of the nano material is 2 times of the weight of the chromogenic substance.
The preparation method of the composite particles comprises the following steps:
(A) 0.02kg of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane is added to 1kg of dimethyl sulfoxide, then 0.1kg of water is added, and the mixture is stirred and heated to 95 ℃;
(B) then adding 0.01kg of potato starch while stirring, keeping the temperature and stirring for 90 minutes, and naturally cooling to room temperature to obtain a starch solution;
(C) and then adding 0.2kg of nanorod crystal attapulgite into the starch solution, uniformly stirring and dispersing, dropwise adding 5kg of absolute ethyl alcohol, continuously stirring for 40 minutes after dropwise adding, ultrasonically oscillating for 50 minutes, centrifuging, washing with ethanol, and drying to obtain the composite particles.
The nanorod crystal attapulgite is prepared by the following method: adding 1kg of attapulgite into 2kg of water, extruding the mixture for 2 times by using a roller, transferring the mixture into a pressure-resistant closed container with a rapid pressure relief device, heating the mixture to 185 ℃ in a closed manner, preserving the temperature for 50 minutes, rapidly relieving the pressure to normal pressure, spreading the mixture out, and naturally drying the mixture to obtain the nanorod crystal attapulgite.
The preparation method of the nano material comprises the following steps: adding 1kg of p-aldehyde benzoic acid into 7kg of N, N-dimethylformamide, then adding 0.2kg of 1- (3-dimethylaminopropyl) -3-ethyl carbodiimide hydrochloride and 0.25kg of N-hydroxy thiosuccinimide, dispersing uniformly by ultrasonic waves, then adding 2kg of composite particles, stirring and reacting for 24 hours, removing the N, N-dimethylformamide, washing and drying to obtain the nano material.
Example 3:
preparing a developing solution from a developing substance, slowly dripping the developing solution into the macromolecular emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain the self-fading type wallpaper basement membrane convenient for construction; adding a nano material into the chromogenic solution to realize the loading of the chromogenic substance, wherein the nano material is prepared by the following method: firstly, compounding the nano-rod crystalline attapulgite with the aminated starch nano-particles to obtain composite particles, and then reacting the composite particles with p-aldehyde benzoic acid to obtain the nano-composite material.
The mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 310: 0.5.
the auxiliary agent comprises: 1kg of film-forming assistant, 0.4kg of thickening agent, 0.025kg of bactericide and 0.025kg of defoaming agent.
The film-forming auxiliary agent is propylene glycol butyl ether; the thickening agent is an alkali swelling thickening agent; the bactericide is phycocyanin; the defoaming agent is polyether defoaming agent.
The chromogenic substance is 1-naphtholphthalein, the corresponding polymer emulsion is styrene-acrylic emulsion, and the preparation method of the chromogenic solution is as follows: firstly, adding 1kg of chromogenic substance into 100kg of sodium hydroxide solution with the mass concentration of 11%, heating to 50 ℃, and stirring for 60 minutes under the condition of heat preservation to obtain the chromogenic solution (blue); the system pH was adjusted to 12 before addition of the adjuvant.
The dosage of the nano material is 2.5 times of the weight of the chromogenic substance.
The preparation method of the composite particles comprises the following steps:
(A) 0.015kg of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane is added to 1kg of dimethyl sulfoxide, then 0.15kg of water is added, and the mixture is stirred and heated to 90 ℃;
(B) then adding 0.015kg of sweet potato starch while stirring, keeping the temperature and stirring for 85 minutes, and naturally cooling to room temperature to obtain a starch solution;
(C) and then adding 0.15kg of nanorod crystal attapulgite into the starch solution, uniformly stirring and dispersing, dropwise adding 5.5kg of absolute ethyl alcohol, continuously stirring for 35 minutes after dropwise adding, ultrasonically oscillating for 55 minutes, centrifuging, washing with ethanol, and drying to obtain the composite particles.
The nanorod crystal attapulgite is prepared by the following method: adding 1kg of attapulgite into 1.8kg of water, extruding the mixture for 3 times by using a roller, transferring the mixture into a pressure-resistant closed container with a rapid pressure relief device, heating the mixture to 180 ℃ in a closed manner, preserving the temperature for 60 minutes, rapidly relieving the pressure to normal pressure, spreading the mixture out, and naturally drying the mixture to obtain the nanorod crystal attapulgite.
The preparation method of the nano material comprises the following steps: adding 1kg of p-aldehyde benzoic acid into 6kg of N, N-dimethylformamide, then adding 0.25kg of 1- (3-dimethylaminopropyl) -3-ethyl carbodiimide hydrochloride and 0.2kg of N-hydroxy thiosuccinimide, dispersing uniformly by ultrasonic waves, then adding 2.5kg of composite particles, stirring and reacting for 23 hours, removing the N, N-dimethylformamide, washing and drying to obtain the nano material.
Example 4:
preparing a developing solution from a developing substance, slowly dripping the developing solution into the macromolecular emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain the self-fading type wallpaper basement membrane convenient for construction; adding a nano material into the chromogenic solution to realize the loading of the chromogenic substance, wherein the nano material is prepared by the following method: firstly, compounding the nano-rod crystalline attapulgite with the aminated starch nano-particles to obtain composite particles, and then reacting the composite particles with p-aldehyde benzoic acid to obtain the nano-composite material.
The mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 320: 0.4.
the auxiliary agent comprises: 1kg of film-forming assistant, 0.5kg of thickening agent, 0.02kg of bactericide and 0.03kg of defoaming agent.
The film-forming auxiliary agent is propylene glycol methyl ether acetate; the thickener is polyurethane thickener; the bactericide is sodium phenylpropionate; the defoaming agent is an organic silicon defoaming agent.
The chromogenic substance is m-nitrotoluene, the corresponding polymer emulsion is polyvinyl alcohol emulsion, and the preparation method of the chromogenic solution is as follows: firstly, adding 1kg of chromogenic substance into 30kg of absolute ethyl alcohol, and carrying out ultrasonic oscillation for 30 minutes to obtain the chromogenic solution (yellow).
The dosage of the nano material is 2 times of the weight of the chromogenic substance.
The preparation method of the composite particles comprises the following steps:
(A) 0.02kg of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane is added to 1kg of dimethyl sulfoxide, then 0.1kg of water is added, and the mixture is stirred and heated to 95 ℃;
(B) then adding 0.01kg of corn starch while stirring, keeping the temperature and stirring for 90 minutes, and naturally cooling to room temperature to obtain a starch solution;
(C) and then adding 0.2kg of nanorod crystal attapulgite into the starch solution, uniformly stirring and dispersing, dropwise adding 5kg of absolute ethyl alcohol, continuously stirring for 40 minutes after dropwise adding, ultrasonically oscillating for 50 minutes, centrifuging, washing with ethanol, and drying to obtain the composite particles.
The nanorod crystal attapulgite is prepared by the following method: adding 1kg of attapulgite into 2kg of water, extruding the mixture for 2 times by using a roller, transferring the mixture into a pressure-resistant closed container with a rapid pressure relief device, heating the mixture to 185 ℃ in a closed manner, preserving the temperature for 50 minutes, rapidly relieving the pressure to normal pressure, spreading the mixture out, and naturally drying the mixture to obtain the nanorod crystal attapulgite.
The preparation method of the nano material comprises the following steps: adding 1kg of p-aldehyde benzoic acid into 7kg of N, N-dimethylformamide, then adding 0.2kg of 1- (3-dimethylaminopropyl) -3-ethyl carbodiimide hydrochloride and 0.25kg of N-hydroxy thiosuccinimide, dispersing uniformly by ultrasonic waves, then adding 2kg of composite particles, stirring and reacting for 24 hours, removing the N, N-dimethylformamide, washing and drying to obtain the nano material.
Comparative example 1
Preparing a developing solution from a developing substance, slowly dripping the developing solution into the macromolecular emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain the self-fading type wallpaper basement membrane convenient for construction; and adding the nanorod crystal attapulgite into the chromogenic solution to realize the loading of the chromogenic substance.
The mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 300: 0.6.
the auxiliary agent comprises: 1kg of film-forming assistant, 0.3kg of thickening agent, 0.03kg of bactericide and 0.02kg of defoaming agent.
The film-forming auxiliary agent is propylene glycol butyl ether; the thickening agent is hydroxyethyl cellulose; the bactericide is potassium sorbate.
The chromogenic substance is 1-naphtholphthalein, the corresponding polymer emulsion is styrene-acrylic emulsion, and the preparation method of the chromogenic solution is as follows: firstly, adding 1kg of chromogenic substance into 105kg of 10% sodium hydroxide solution with mass concentration, heating to 55 ℃, and stirring for 50 minutes under the condition of heat preservation to obtain the chromogenic solution (blue); the system pH was adjusted to 11 before addition of the adjuvant.
The dosage of the nano-rod crystal attapulgite is 3 times of the weight of the chromogenic substance.
The nanorod crystal attapulgite is prepared by the following method: adding 1kg of attapulgite into 1.5kg of water, extruding the mixture for 3 times by using a roller, transferring the mixture into a pressure-resistant closed container with a rapid pressure relief device, heating the mixture to 175 ℃ in a closed manner, preserving the temperature for 70 minutes, rapidly relieving the pressure to normal pressure, spreading the mixture, and naturally drying the mixture to obtain the nanorod crystal attapulgite.
Comparative example 2
Preparing a developing solution from a developing substance, slowly dripping the developing solution into the macromolecular emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain the self-fading type wallpaper basement membrane convenient for construction; adding a nano material into the chromogenic solution to realize the loading of the chromogenic substance, wherein the nano material is prepared by the following method: and reacting the aminated starch nanoparticles with p-aldehyde benzoic acid to obtain the amino-modified starch nanoparticles.
The mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 300: 0.6.
the auxiliary agent comprises: 1kg of film-forming assistant, 0.3kg of thickening agent, 0.03kg of bactericide and 0.02kg of defoaming agent.
The film-forming auxiliary agent is propylene glycol butyl ether; the thickening agent is hydroxyethyl cellulose; the bactericide is potassium sorbate.
The chromogenic substance is 1-naphtholphthalein, the corresponding polymer emulsion is styrene-acrylic emulsion, and the preparation method of the chromogenic solution is as follows: firstly, adding 1kg of chromogenic substance into 105kg of 10% sodium hydroxide solution with mass concentration, heating to 55 ℃, and stirring for 50 minutes under the condition of heat preservation to obtain the chromogenic solution (blue); the system pH was adjusted to 11 before addition of the adjuvant.
The dosage of the nano material is 3 times of the weight of the chromogenic substance.
The preparation method of the aminated starch nanoparticles comprises the following steps:
(A) 0.01kg of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane is added to 1kg of dimethyl sulfoxide, then 0.2kg of water is added, and the mixture is stirred and heated to 85 ℃;
(B) then adding 0.02kg of corn starch while stirring, keeping the temperature and stirring for 80 minutes, and naturally cooling to room temperature to obtain a starch solution;
(C) and dropwise adding 6kg of absolute ethyl alcohol into the starch solution, continuously stirring for 30 minutes after dropwise adding, oscillating for 60 minutes by ultrasonic waves, centrifuging, washing by using ethyl alcohol, and drying to obtain the aminated starch nanoparticles.
The preparation method of the nano material comprises the following steps: adding 1kg of p-aldehyde benzoic acid into 5kg of N, N-dimethylformamide, then adding 0.3kg of 1- (3-dimethylaminopropyl) -3-ethyl carbodiimide hydrochloride and 0.15kg of N-hydroxy thiosuccinimide, dispersing uniformly by ultrasonic waves, then adding 3kg of aminated starch nanoparticles, stirring and reacting for 22 hours, removing the N, N-dimethylformamide, washing and drying to obtain the nano material.
Comparative example 3
Preparing a developing solution from a developing substance, slowly dripping the developing solution into the macromolecular emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain the self-fading type wallpaper basement membrane convenient for construction; adding a nano material into the chromogenic solution to realize the loading of the chromogenic substance, wherein the nano material is prepared by the following method: and compounding the nano-rod crystal attapulgite with the aminated starch nano-particles to obtain the nano-composite material.
The mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 300: 0.6.
the auxiliary agent comprises: 1kg of film-forming assistant, 0.3kg of thickening agent, 0.03kg of bactericide and 0.02kg of defoaming agent.
The film-forming auxiliary agent is propylene glycol butyl ether; the thickening agent is hydroxyethyl cellulose; the bactericide is potassium sorbate.
The chromogenic substance is 1-naphtholphthalein, the corresponding polymer emulsion is styrene-acrylic emulsion, and the preparation method of the chromogenic solution is as follows: firstly, adding 1kg of chromogenic substance into 105kg of 10% sodium hydroxide solution with mass concentration, heating to 55 ℃, and stirring for 50 minutes under the condition of heat preservation to obtain the chromogenic solution (blue); the system pH was adjusted to 11 before addition of the adjuvant.
The dosage of the nano material is 3 times of the weight of the chromogenic substance.
The preparation method of the nano material comprises the following steps:
(A) 0.01kg of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane is added to 1kg of dimethyl sulfoxide, then 0.2kg of water is added, and the mixture is stirred and heated to 85 ℃;
(B) then adding 0.02kg of corn starch while stirring, keeping the temperature and stirring for 80 minutes, and naturally cooling to room temperature to obtain a starch solution;
(C) and then adding 0.1kg of nanorod crystal attapulgite into the starch solution, uniformly stirring and dispersing, dropwise adding 6kg of absolute ethyl alcohol, continuously stirring for 30 minutes after dropwise adding, ultrasonically oscillating for 60 minutes, centrifuging, washing with ethanol, and drying to obtain the composite particles.
The nanorod crystal attapulgite is prepared by the following method: adding 1kg of attapulgite into 1.5kg of water, extruding the mixture for 3 times by using a roller, transferring the mixture into a pressure-resistant closed container with a rapid pressure relief device, heating the mixture to 175 ℃ in a closed manner, preserving the temperature for 70 minutes, rapidly relieving the pressure to normal pressure, spreading the mixture out, and naturally drying the mixture to obtain the nano material.
Comparative example 4
The preparation method of the self-fading type wallpaper basement membrane convenient for construction comprises the steps of preparing a developing solution from a developing substance, slowly dropwise adding the developing solution into a polymer emulsion, uniformly stirring, adding an auxiliary agent, and uniformly stirring to obtain the self-fading type wallpaper basement membrane convenient for construction.
The mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 300: 0.6.
the auxiliary agent comprises: 1kg of film-forming assistant, 0.3kg of thickening agent, 0.03kg of bactericide and 0.02kg of defoaming agent.
The film-forming auxiliary agent is propylene glycol butyl ether; the thickening agent is hydroxyethyl cellulose; the bactericide is potassium sorbate.
The chromogenic substance is 1-naphtholphthalein, the corresponding polymer emulsion is styrene-acrylic emulsion, and the preparation method of the chromogenic solution is as follows: firstly, adding 1kg of chromogenic substance into 105kg of 10% sodium hydroxide solution with mass concentration, heating to 55 ℃, and stirring for 50 minutes under the condition of heat preservation to obtain the chromogenic solution (blue); the system pH was adjusted to 11 before addition of the adjuvant.
Test examples
The wallpaper base film obtained in the embodiments 1-4 or the comparative examples 1-4 is used for construction, and the specific method comprises the following steps: firstly, 0.5L of water is added into each liter of wallpaper basement membrane for dilution, and then the diluted wallpaper basement membrane is used immediately according to the length of 22m2The construction area of the/L is constructed from bottom to top by adopting a roller, after 2 times of roller coating, timing is started, visual observation is carried out, and the time required for the color to completely disappear in a ventilation environment is recorded, and the result is shown in Table 1.
The hardness test is carried out by referring to GB/T6739-2006 paint and varnish pencil method determination coating film hardness standards, wherein B represents the blackness, and the more B, the darker the color is, the less the hardness is; h represents hardness, and the larger the number of H means the larger the hardness, the lighter the color; the impact resistance test is carried out by referring to GB/T1732-1993 paint film impact resistance test method; the results are shown in Table 2.
TABLE 1 time required for complete disappearance of color
| Time required for complete disappearance of color (minutes) | |
| Example 1 | 111 |
| Example 2 | 108 |
| Example 3 | 102 |
| Example 4 | 109 |
| Comparative example 1 | 193 |
| Comparative example 2 | 159 |
| Comparative example 3 | 151 |
| Comparative example 4 | 255 |
TABLE 2 hardness and impact resistance test results
| Hardness of | Impact resistance (cm) | |
| Example 1 | 4H | 71 |
| Example 2 | 4H | 73 |
| Example 3 | 5H | 79 |
| Example 4 | 4H | 72 |
| Comparative example 1 | H | 40 |
| Comparative example 2 | 2H | 55 |
| Comparative example 3 | 2H | 58 |
| Comparative example 4 | HB | 30 |
As is clear from tables 1 and 2, the color of the wallpaper base film obtained in examples 1 to 4 completely disappeared within 2 hours, and the wallpaper base film was excellent in hardness and impact resistance.
Comparative example 1 replaces the nano material with the nanorod crystalline attapulgite, comparative example 2 omits the nanorod crystalline attapulgite when preparing the nano material, comparative example 3 omits the step of modifying the aldehyde benzoic acid when preparing the nano material, and comparative example 4 omits the nano material, the hardness and the impact resistance of the obtained wallpaper basement membrane are obviously poor, the color disappearance time is obviously prolonged, the synergistic effect of the nanorod crystalline attapulgite, the starch nanoparticles and the surface modification of the aldehyde benzoic acid is demonstrated, the specific surface area is increased, and the decoloring effect and the mechanical property are favorably improved.
Although the present invention has been described with reference to the specific embodiments, it is not intended to limit the scope of the present invention, and various modifications and variations can be made by those skilled in the art without inventive changes based on the technical solution of the present invention.
Claims (10)
1. A preparation method of a self-fading type wallpaper basement membrane convenient to construct is characterized in that firstly, a chromogenic substance is prepared into a chromogenic solution, then the chromogenic solution is slowly dripped into a polymer emulsion, and is stirred and uniformly mixed, then an auxiliary agent is added, and the self-fading type wallpaper basement membrane convenient to construct is obtained through stirring and uniformly mixing; wherein the chromogenic substance is any one of 1-naphtholphthalein, thymolphthalein, m-nitrotoluene or p-nitrotoluene; adding a nano material into the chromogenic solution to realize the loading of the chromogenic substance, wherein the nano material is prepared by the following method: firstly, compounding the nano-rod crystalline attapulgite with the aminated starch nano-particles to obtain composite particles, and then reacting the composite particles with p-aldehyde benzoic acid to obtain the nano-composite material.
2. The preparation method according to claim 1, wherein the mass ratio of the chromogenic substance to the polymer emulsion to the auxiliary agent is 1: 300-320: 0.4 to 0.6.
3. The method according to claim 1, wherein the auxiliary comprises, in parts by weight: 1 part of film-forming assistant, 0.3-0.5 part of thickening agent, 0.02-0.03 part of bactericide and 0.02-0.03 part of defoaming agent.
4. The preparation method of claim 1, wherein the chromogenic substance is 1-naphtholphthalein or thymolphthalein, the corresponding polymer emulsion is styrene-acrylic emulsion, and the preparation method of the chromogenic solution comprises the following steps in parts by weight: firstly, adding 1 part of chromogenic substance into 95-105 parts of 10-12% sodium hydroxide solution by mass concentration, heating to 45-55 ℃, and stirring for 50-70 minutes under heat preservation to obtain the chromogenic solution; and adjusting the pH value of the system to 11-12 before adding the auxiliary agent.
5. The preparation method according to claim 1, wherein the chromogenic substance is m-nitrotoluene or p-nitrotoluene, the corresponding polymer emulsion is any one of acrylic emulsion, vinyl acetate-ethylene copolymer emulsion or polyvinyl alcohol emulsion, and the preparation method of the chromogenic solution comprises the following steps in parts by weight: firstly, adding 1 part of color developing substance into 30-40 parts of absolute ethyl alcohol, and carrying out ultrasonic oscillation for 20-30 minutes to obtain the color developing solution.
6. The method according to claim 1, wherein the amount of the nanomaterial is 2 to 3 times the weight of the chromogenic substance.
7. The method according to claim 1, wherein the composite particles are prepared by the following method in parts by weight:
(A) firstly, adding 0.01-0.02 part of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane into 1 part of dimethyl sulfoxide, then adding 0.1-0.2 part of water, stirring and heating to 85-95 ℃;
(B) then adding 0.01-0.02 part of starch while stirring, preserving heat, stirring for 80-90 minutes, and naturally cooling to room temperature to obtain a starch solution;
(C) and then adding 0.1-0.2 part of nanorod crystal attapulgite into the starch solution, uniformly stirring and dispersing, dropwise adding 5-6 parts of absolute ethyl alcohol, continuously stirring for 30-40 minutes after dropwise adding, ultrasonically oscillating for 50-60 minutes, centrifuging, washing with ethanol, and drying to obtain the composite particles.
8. The preparation method of claim 1, wherein the nanorod crystalline attapulgite is prepared by the following method in parts by weight: adding 1 part of attapulgite into 1.5-2 parts of water by weight, extruding the mixture for 2-3 times by using a roller, transferring the mixture into a pressure-resistant closed container with a rapid pressure relief device, heating the mixture in a closed manner to 175-185 ℃, preserving the temperature for 50-70 minutes, rapidly relieving the pressure to normal pressure, spreading the mixture out, and naturally drying the mixture to obtain the nanorod crystal attapulgite.
9. The preparation method of claim 1, wherein the nano material is prepared by the following steps in parts by weight: adding 1 part of p-aldehyde benzoic acid into 5-7 parts of N, N-dimethylformamide, then adding 0.2-0.3 part of 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride and 0.15-0.25 part of N-hydroxy thiosuccinimide, ultrasonically dispersing uniformly, then adding 2-3 parts of composite particles, stirring and reacting for 22-24 hours, removing the N, N-dimethylformamide, washing, and drying to obtain the nano material.
10. A self-fading wallpaper base film convenient for construction, obtained by the preparation method of any one of claims 1-9.
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