CN115677320B - Indoor non-intumescent fireproof coating and preparation process thereof - Google Patents
Indoor non-intumescent fireproof coating and preparation process thereof Download PDFInfo
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Abstract
The invention relates to the technical field of fireproof coating preparation processes, and provides an indoor non-intumescent fireproof coating and a preparation process thereof, wherein the prepared silica sol and aluminum silicate fibers are compounded to obtain an aerogel fiber composite material, so that the defect of low strength and poor toughness of pure silica aerogel can be improved, the characteristic of low heat conductivity of the pure silica aerogel can be maintained, and the effects of high temperature resistance, high strength and fireproof can be achieved by combining the characteristics of the silica sol and the aluminum silicate fibers; secondly, according to 3: the magnesium-phosphorus ratio of 1 is used for preparing the potassium magnesium phosphate cementing component, so that hydration products in the potassium magnesium phosphate cementing component, the rest unreacted magnesium oxide, the vitrified micro bubble, the expanded vermiculite and the aerogel fiber composite material form a compact framework structure, and the vitrified micro bubble, the expanded vermiculite and the aerogel fiber composite material can be well wrapped, so that the fireproof paint has better compressive strength and bonding strength.
Description
Technical Field
The invention relates to the technical field of fireproof paint preparation processes, in particular to an indoor non-intumescent fireproof paint and a preparation process thereof.
Background
The construction industrialization can be divided into steel structure construction, precast concrete assembled structure construction and composite wood structure construction from structural forms, the steel structure technology is used for being favorable for construction industrial production in engineering construction, promotes development of industries such as metallurgy, building materials and the like, can be recycled, saves energy, protects environment and meets the requirements of sustainable development of national economy. The steel structure has the advantages of light weight, recycling, convenient transportation and installation and the like, has more application in large-space buildings, however, the steel structure has the characteristics of heat resistance and low heat resistance to high temperature (about 550 ℃), and when the heated temperature is above 550 ℃, the bearing capacity of the steel structure is obviously reduced, so that the steel structure fireproof and high-temperature-resistant steel structure becomes a key safety problem of the steel structure building, and is very important for heat insulation and fireproof measures of the steel structure building.
In order to solve the defect that the steel structure is not resistant to high temperature, a fireproof coating is required to be coated on the surface of the steel structure, but most fireproof coatings on the market are poor in fireproof performance and anti-falling performance at present, so that how to prepare a non-intumescent fireproof coating with good fireproof performance becomes a technical problem to be solved by the technicians in the field.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an indoor non-intumescent fireproof coating and a preparation process thereof, which aim to ensure that the indoor non-intumescent fireproof coating has better fireproof performance and prevent the fireproof coating from falling off.
Technical proposal
In order to achieve the above purpose, the invention is realized by the following technical scheme:
an indoor non-intumescent fire-retardant coating, comprising, in parts by weight: 65-70 parts of a potassium magnesium phosphate cementing component, 18-20 parts of styrene-acrylic emulsion, 16-18 parts of aerogel fiber composite material, 2-3 parts of pigment and 1-2 parts of auxiliary agent.
Further, the preparation method of the potassium magnesium phosphate cementing component comprises the following steps:
step1, weighing the following components in parts by weight: 40-45 parts of magnesium oxide, 14-16 parts of potassium dihydrogen phosphate, 15-18 parts of vitrified microbeads and 16-18 parts of expanded vermiculite for standby;
step2, respectively passing the vitrified micro bubbles and the expanded vermiculite by weight parts through a 100-120 mesh vibrating screen, and putting the sieved vitrified micro bubbles and expanded vermiculite into a stirring kettle for mixing to obtain mixed components;
and 3, pouring the magnesium oxide, the monopotassium phosphate and the mixed components in the step2 into a stirring kettle for mixing and stirring, and obtaining the potassium magnesium phosphate cementing component.
Further, the preparation method of the aerogel fiber composite material comprises the following steps:
s1, weighing in proportionPouring ethyl orthosilicate, absolute ethyl alcohol and deionized water into a beaker for mixing and stirring, dripping hydrochloric acid after stirring for 5-8min, continuously stirring for 2-3min, placing the beaker into a water bath box at 40 ℃ for standing for 2h, then taking out the beaker from the water bath box, adding dimethylformamide, deionized water and ammonia water into a system in the beaker, and stirring for 3-5min to obtain silica sol, wherein the final molar ratio of the additive is ethyl orthosilicate: absolute ethyl alcohol: deionized water: dimethylformamide: hydrochloric acid: ammonia is 1:7:2:0.25:10 -5 ：3.57×10 -3 ；
S2, pouring half of the silica sol in the S1 into a culture dish, slowly spreading the aluminum silicate fiber felt on the surface of the silica sol, pouring the rest half of the silica sol into the surface of the aluminum silicate fiber felt to enable the aluminum silicate fiber felt to fully infiltrate the silica sol, and finally placing the culture dish into a blast drying box at 40 ℃ for standing for 2 hours to enable the silica sol to be condensed into wet gel, so as to obtain the aluminum silicate fiber-silica wet gel composite material, wherein the volume ratio of the silica sol to the aluminum silicate fiber felt is 3:1, a step of;
s3, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material in the S2 in an aging liquid prepared by mixing absolute ethyl alcohol and deionized water for 12-14 hours;
s4, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated by the step S3 in a modified liquid prepared by mixing absolute ethyl alcohol, trimethylchlorosilane and n-hexane, and modifying for 36-40h at 45-55 ℃;
s5, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated in the step S4 in n-hexane for 2 hours, then drying the wet gel composite material for 12 hours at 70 ℃, and then further drying the wet gel composite material for 3 hours at 200 ℃ to obtain the aerogel fiber composite material.
Further, the stirring speed in the step S1 is 300-500r/min, and the dripping speed of hydrochloric acid is 1-2 drops/S.
Further, the aging liquid in the step S3 is absolute ethyl alcohol and deionized water according to the following weight ratio of 4:1 by volume ratio.
Further, the modified liquid in the step S4 is absolute ethyl alcohol, trimethylchlorosilane and n-hexane according to the following ratio of 1:3:26 by volume ratio.
Further, the pigment is rutile titanium dioxide.
Furthermore, the auxiliary agent is a film auxiliary agent, a dispersing agent, a defoaming agent, a wetting agent and a water reducing agent which are mixed according to the equal volume ratio, wherein the film auxiliary agent is dodecanol ester, the dispersing agent is a sodium polycarboxylate dispersing agent, the defoaming agent is a paraffin defoaming agent, the wetting agent is a nonionic surfactant, and the water reducing agent is a sodium lignin sulfonate water reducing agent.
A preparation process of an indoor non-intumescent fire retardant coating, which comprises the following steps:
step1, pouring the above-mentioned potassium magnesium phosphate cementing component and styrene-acrylic emulsion into a stirring kettle, stirring at a rotating speed of 800-1000r/min, and obtaining a base material component;
step2, crushing the aerogel fiber composite material in parts by weight, adding the crushed aerogel fiber composite material into a base material component in Step1, adding the pigment and the auxiliary agent in parts by weight into the system, and continuously stirring the mixture at a rotating speed of 1500-1600r/min to obtain the indoor non-intumescent fire retardant coating.
Further, the stirring time in Step1 is 10-15min, and the stirring time in Step2 is 18-20min.
Advantageous effects
The invention provides an indoor non-expansion fireproof paint and a preparation process thereof, and compared with the prior art, the indoor non-expansion fireproof paint has the following beneficial effects:
according to the invention, the prepared silica sol and aluminum silicate fibers are compounded to obtain the aerogel fiber composite material, so that the defect of low strength and poor toughness of the pure silica aerogel can be overcome, the characteristic of low heat conductivity of the pure silica aerogel can be maintained, and the effects of high temperature resistance, high strength and fire resistance can be achieved by combining the characteristics of the silica sol and the aluminum silicate fibers; secondly, according to 3: the magnesium-phosphorus ratio of 1 is used for preparing the potassium magnesium phosphate cementing component, so that hydration products in the potassium magnesium phosphate cementing component, the rest unreacted magnesium oxide, the vitrified micro bubble, the expanded vermiculite and the aerogel fiber composite material form a compact framework structure, and the vitrified micro bubble, the expanded vermiculite and the aerogel fiber composite material can be well wrapped, so that the fireproof paint has better compressive strength and bonding strength.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the indoor non-intumescent fire retardant coating of the embodiment comprises the following components in parts by weight: 65 parts of potassium magnesium phosphate cementing component, 18 parts of styrene-acrylic emulsion, 16 parts of aerogel fiber composite material, 2 parts of pigment and 1 part of auxiliary agent.
The preparation method of the potassium magnesium phosphate cementing component comprises the following steps:
step1, weighing the following components in parts by weight: 40 parts of magnesium oxide, 14 parts of potassium dihydrogen phosphate, 15 parts of vitrified micro bubbles and 16 parts of expanded vermiculite for standby;
step2, respectively passing the vitrified micro bubbles and the expanded vermiculite by weight parts through a 100-mesh vibrating screen, and putting the sieved vitrified micro bubbles and expanded vermiculite into a stirring kettle for mixing to prepare mixed components;
and 3, pouring the magnesium oxide, the monopotassium phosphate and the mixed components in the step2 into a stirring kettle for mixing and stirring, and obtaining the potassium magnesium phosphate cementing component.
The preparation method of the aerogel fiber composite material comprises the following steps:
s1, weighing tetraethoxysilane, absolute ethyl alcohol and deionized water according to a proportion, pouring the tetraethoxysilane, the absolute ethyl alcohol and the deionized water into a beaker for carrying outMixing and stirring, dropwise adding hydrochloric acid after stirring for 5min, continuously stirring for 2min, placing a beaker in a water bath box at 40 ℃ for standing for 2h, taking out the beaker from the water bath box, adding dimethylformamide, deionized water and ammonia water into a system in the beaker, and stirring for 3min to obtain silica sol, wherein the final molar ratio of the additive is ethyl orthosilicate: absolute ethyl alcohol: deionized water: dimethylformamide: hydrochloric acid: ammonia is 1:7:2:0.25:10 -5 ：3.57×10 -3 ；
S2, pouring half of the silica sol in the S1 into a culture dish, slowly spreading the aluminum silicate fiber felt on the surface of the silica sol, pouring the rest half of the silica sol into the surface of the aluminum silicate fiber felt to enable the aluminum silicate fiber felt to fully infiltrate the silica sol, and finally placing the culture dish into a blast drying box at 40 ℃ for standing for 2 hours to enable the silica sol to be condensed into wet gel, so as to obtain the aluminum silicate fiber-silica wet gel composite material, wherein the volume ratio of the silica sol to the aluminum silicate fiber felt is 3:1, a step of;
s3, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material in the S2 in an aging liquid prepared by mixing absolute ethyl alcohol and deionized water for 12 hours;
s4, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated by the step S3 in a modifying liquid prepared by mixing absolute ethyl alcohol, trimethylchlorosilane and n-hexane, and modifying for 36 hours at 45 ℃;
s5, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated in the step S4 in n-hexane for 2 hours, then drying the wet gel composite material for 12 hours at 70 ℃, and then further drying the wet gel composite material for 3 hours at 200 ℃ to obtain the aerogel fiber composite material.
The stirring speed in S1 is 300r/min, and the dripping speed of hydrochloric acid is 1 drop/S.
The aging liquid in S3 is absolute ethyl alcohol and deionized water according to the following weight ratio of 4:1 by volume ratio.
The modified liquid in S4 is absolute ethyl alcohol, trimethylchlorosilane and n-hexane according to the following ratio of 1:3:26 by volume ratio.
The pigment is rutile type titanium dioxide.
The auxiliary agent is a film auxiliary agent, a dispersing agent, a defoaming agent, a wetting agent and a water reducer which are mixed according to the equal volume ratio, wherein the film auxiliary agent is dodecanol ester, the dispersing agent is a sodium polycarboxylate type dispersing agent, the defoaming agent is a paraffin type defoaming agent, the wetting agent is a nonionic surfactant, and the water reducer is a sodium lignin sulfonate water reducer.
A preparation process of indoor non-expansion fireproof paint comprises the following steps:
step1, pouring the above-mentioned potassium magnesium phosphate cementing component and styrene-acrylic emulsion into a stirring kettle, stirring at 800r/min to obtain a base material component;
step2, crushing the aerogel fiber composite material in parts by weight, adding the crushed aerogel fiber composite material into a base material component in Step1, adding the pigment and the auxiliary agent in parts by weight into the system, continuously stirring the mixture at a rotating speed of 1500r/min, and obtaining the indoor non-intumescent fire-retardant coating after stirring.
The stirring time in Step1 was 10min, and the stirring time in Step2 was 18min.
Example 2:
the indoor non-intumescent fire retardant coating of the embodiment comprises the following components in parts by weight: 70 parts of potassium magnesium phosphate cementing component, 20 parts of styrene-acrylic emulsion, 18 parts of aerogel fiber composite material, 3 parts of pigment and 2 parts of auxiliary agent.
The preparation method of the potassium magnesium phosphate cementing component comprises the following steps:
step1, weighing the following components in parts by weight: 45 parts of magnesium oxide, 16 parts of potassium dihydrogen phosphate, 18 parts of vitrified micro bubbles and 18 parts of expanded vermiculite for standby;
step2, respectively passing the vitrified micro bubbles and the expanded vermiculite by weight parts through a 120-mesh vibrating screen, and putting the sieved vitrified micro bubbles and expanded vermiculite into a stirring kettle for mixing to prepare mixed components;
and 3, pouring the magnesium oxide, the monopotassium phosphate and the mixed components in the step2 into a stirring kettle for mixing and stirring, and obtaining the potassium magnesium phosphate cementing component.
The preparation method of the aerogel fiber composite material comprises the following steps:
s1, weighing ethyl orthosilicate, absolute ethyl alcohol and deionized water according to a proportion, pouring the ethyl orthosilicate, the absolute ethyl alcohol and the deionized water into a beaker for mixing and stirring, dripping hydrochloric acid after stirring for 8min, continuously stirring for 3min, placing the beaker into a water bath box at 40 ℃ for standing for 2h, then taking out the beaker from the water bath box, adding dimethylformamide, deionized water and ammonia water into a system in the beaker, and stirring for 5min to obtain silica sol, wherein the final molar ratio of the additive is ethyl orthosilicate: absolute ethyl alcohol: deionized water: dimethylformamide: hydrochloric acid: ammonia is 1:7:2:0.25:10 -5 ：3.57×10 -3 ；
S2, pouring half of the silica sol in the S1 into a culture dish, slowly spreading the aluminum silicate fiber felt on the surface of the silica sol, pouring the rest half of the silica sol into the surface of the aluminum silicate fiber felt to enable the aluminum silicate fiber felt to fully infiltrate the silica sol, and finally placing the culture dish into a blast drying box at 40 ℃ for standing for 2 hours to enable the silica sol to be condensed into wet gel, so as to obtain the aluminum silicate fiber-silica wet gel composite material, wherein the volume ratio of the silica sol to the aluminum silicate fiber felt is 3:1, a step of;
s3, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material in the S2 in an aging liquid prepared by mixing absolute ethyl alcohol and deionized water for 14 hours;
s4, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated by the step S3 in a modified liquid prepared by mixing absolute ethyl alcohol, trimethylchlorosilane and n-hexane, and modifying for 40 hours at 55 ℃;
s5, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated in the step S4 in n-hexane for 2 hours, then drying the wet gel composite material for 12 hours at 70 ℃, and then further drying the wet gel composite material for 3 hours at 200 ℃ to obtain the aerogel fiber composite material.
The stirring speed in S1 is 500r/min, and the dripping speed of hydrochloric acid is 2 drops/S.
The aging liquid in S3 is absolute ethyl alcohol and deionized water according to the following weight ratio of 4:1 by volume ratio.
The modified liquid in S4 is absolute ethyl alcohol, trimethylchlorosilane and n-hexane according to the following ratio of 1:3:26 by volume ratio.
The pigment is rutile type titanium dioxide.
The auxiliary agent is a film auxiliary agent, a dispersing agent, a defoaming agent, a wetting agent and a water reducer which are mixed according to the equal volume ratio, wherein the film auxiliary agent is dodecanol ester, the dispersing agent is a sodium polycarboxylate type dispersing agent, the defoaming agent is a paraffin type defoaming agent, the wetting agent is a nonionic surfactant, and the water reducer is a sodium lignin sulfonate water reducer.
A preparation process of indoor non-expansion fireproof paint comprises the following steps:
step1, pouring the above-mentioned potassium magnesium phosphate cementing component and styrene-acrylic emulsion into a stirring kettle, stirring at a rotating speed of 1000r/min, and obtaining a base material component;
step2, crushing the aerogel fiber composite material in parts by weight, adding the crushed aerogel fiber composite material into a base material component in Step1, adding the pigment and the auxiliary agent in parts by weight into the system, continuously stirring the mixture at a rotating speed of 1600r/min, and obtaining the indoor non-intumescent fire-retardant coating after stirring.
The stirring time in Step1 was 15min, and the stirring time in Step2 was 20min.
Example 3:
the indoor non-intumescent fire retardant coating of the embodiment comprises the following components in parts by weight: 68 parts of a magnesium potassium phosphate cementing component, 19 parts of styrene-acrylic emulsion, 17 parts of an aerogel fiber composite, 3 parts of pigment and 1 part of an auxiliary agent.
The preparation method of the potassium magnesium phosphate cementing component comprises the following steps:
step1, weighing the following components in parts by weight: 43 parts of magnesium oxide, 15 parts of potassium dihydrogen phosphate, 17 parts of vitrified micro bubbles and 17 parts of expanded vermiculite for standby;
step2, respectively passing the vitrified micro bubbles and the expanded vermiculite by weight parts through a 110-mesh vibrating screen, and putting the sieved vitrified micro bubbles and expanded vermiculite into a stirring kettle for mixing to prepare mixed components;
and 3, pouring the magnesium oxide, the monopotassium phosphate and the mixed components in the step2 into a stirring kettle for mixing and stirring, and obtaining the potassium magnesium phosphate cementing component.
The preparation method of the aerogel fiber composite material comprises the following steps:
s1, weighing ethyl orthosilicate, absolute ethyl alcohol and deionized water according to a proportion, pouring the ethyl orthosilicate, the absolute ethyl alcohol and the deionized water into a beaker for mixing and stirring, dripping hydrochloric acid after stirring for 7min, continuously stirring for 3min, placing the beaker into a water bath box at 40 ℃ for standing for 2h, then taking out the beaker from the water bath box, adding dimethylformamide, deionized water and ammonia water into a system in the beaker, and stirring for 4min to obtain silica sol, wherein the final molar ratio of the additive is ethyl orthosilicate: absolute ethyl alcohol: deionized water: dimethylformamide: hydrochloric acid: ammonia is 1:7:2:0.25:10 -5 ：3.57×10 -3 ；
S2, pouring half of the silica sol in the S1 into a culture dish, slowly spreading the aluminum silicate fiber felt on the surface of the silica sol, pouring the rest half of the silica sol into the surface of the aluminum silicate fiber felt to enable the aluminum silicate fiber felt to fully infiltrate the silica sol, and finally placing the culture dish into a blast drying box at 40 ℃ for standing for 2 hours to enable the silica sol to be condensed into wet gel, so as to obtain the aluminum silicate fiber-silica wet gel composite material, wherein the volume ratio of the silica sol to the aluminum silicate fiber felt is 3:1, a step of;
s3, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material in the S2 in an aging liquid prepared by mixing absolute ethyl alcohol and deionized water for 13 hours;
s4, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated by the step S3 in a modifying liquid prepared by mixing absolute ethyl alcohol, trimethylchlorosilane and n-hexane, and modifying for 38 hours at 50 ℃;
s5, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated in the step S4 in n-hexane for 2 hours, then drying the wet gel composite material for 12 hours at 70 ℃, and then further drying the wet gel composite material for 3 hours at 200 ℃ to obtain the aerogel fiber composite material.
The stirring speed in S1 is 400r/min, and the dripping speed of hydrochloric acid is 2 drops/S.
The aging liquid in S3 is absolute ethyl alcohol and deionized water according to the following weight ratio of 4:1 by volume ratio.
The modified liquid in S4 is absolute ethyl alcohol, trimethylchlorosilane and n-hexane according to the following ratio of 1:3:26 by volume ratio.
The pigment is rutile type titanium dioxide.
The auxiliary agent is a film auxiliary agent, a dispersing agent, a defoaming agent, a wetting agent and a water reducer which are mixed according to the equal volume ratio, wherein the film auxiliary agent is dodecanol ester, the dispersing agent is a sodium polycarboxylate type dispersing agent, the defoaming agent is a paraffin type defoaming agent, the wetting agent is a nonionic surfactant, and the water reducer is a sodium lignin sulfonate water reducer.
A preparation process of indoor non-expansion fireproof paint comprises the following steps:
step1, pouring the above-mentioned potassium magnesium phosphate cementing component and styrene-acrylic emulsion into a stirring kettle, stirring at 900r/min to obtain a base material component;
step2, crushing the aerogel fiber composite material in parts by weight, adding the crushed aerogel fiber composite material into a base material component in Step1, adding the pigment and the auxiliary agent in parts by weight into the system, continuously stirring the mixture at a rotating speed of 1600r/min, and obtaining the indoor non-intumescent fire-retardant coating after stirring.
The stirring time in Step1 was 13min, and the stirring time in Step2 was 19min.
Performance testing
The indoor non-intumescent coatings obtained in examples 1 to 3 were labeled as example 1, example 2 and example 3, and the commercially available non-intumescent coatings were labeled as comparative examples, and the properties were measured respectively and the measurement results were recorded in the following table:
as shown by the data in the table, the bonding strength and the compressive strength of the indoor non-intumescent fire-retardant coating prepared in the examples 1-3 are obviously higher than those of the common non-intumescent fire-retardant coating in the market, and in the process of detecting the initial drying crack resistance, the indoor non-intumescent fire-retardant coating prepared in the examples 1-3 has no crack, but the common non-intumescent fire-retardant coating in the market has a crack with the width of 0.5mm, so that the indoor non-intumescent fire-retardant coating prepared in the examples 1-3 has better performance and better market popularization value.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The indoor non-intumescent fire-retardant coating is characterized by comprising the following components in parts by weight: 65-70 parts of a potassium magnesium phosphate cementing component, 18-20 parts of styrene-acrylic emulsion, 16-18 parts of aerogel fiber composite material, 2-3 parts of pigment and 1-2 parts of auxiliary agent;
the preparation method of the potassium magnesium phosphate cementing component comprises the following steps:
step1, weighing the following components in parts by weight: 40-45 parts of magnesium oxide, 14-16 parts of potassium dihydrogen phosphate, 15-18 parts of vitrified microbeads and 16-18 parts of expanded vermiculite for standby;
step2, respectively passing the vitrified micro bubbles and the expanded vermiculite by weight parts through a 100-120 mesh vibrating screen, and putting the sieved vitrified micro bubbles and expanded vermiculite into a stirring kettle for mixing to obtain mixed components;
step 3, pouring the magnesium oxide, the monopotassium phosphate and the mixed components in the step2 into a stirring kettle for mixing and stirring, and obtaining the potassium magnesium phosphate cementing component;
the preparation method of the aerogel fiber composite material comprises the following steps:
s1, weighing ethyl orthosilicate, absolute ethyl alcohol and deionized water according to a proportion, pouring the ethyl orthosilicate, the absolute ethyl alcohol and the deionized water into a beaker for mixing and stirring, dripping hydrochloric acid after stirring for 5-8min, continuously stirring for 2-3min, placing the beaker into a water bath box at 40 ℃ for standing for 2h, then taking out the beaker from the water bath box, adding dimethylformamide, deionized water and ammonia water into a system in the beaker, and stirring for 3-5min to obtain silica sol, wherein the additive ethyl orthosilicate: absolute ethyl alcohol: deionized water: dimethylformamide: hydrochloric acid: the final molar ratio of ammonia water is 1:7:2:0.25:10 -5 ：3.57×10 -3 ；
S2, pouring half of the silica sol in the S1 into a culture dish, slowly spreading the aluminum silicate fiber felt on the surface of the silica sol, pouring the rest half of the silica sol into the surface of the aluminum silicate fiber felt to enable the aluminum silicate fiber felt to fully infiltrate the silica sol, and finally placing the culture dish into a blast drying box at 40 ℃ for standing for 2 hours to enable the silica sol to be condensed into wet gel, so as to obtain the aluminum silicate fiber-silica wet gel composite material, wherein the volume ratio of the silica sol to the aluminum silicate fiber felt is 3:1, a step of;
s3, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material in the S2 in an aging liquid prepared by mixing absolute ethyl alcohol and deionized water for 12-14 hours;
s4, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated by the step S3 in a modified liquid prepared by mixing absolute ethyl alcohol, trimethylchlorosilane and n-hexane, and modifying for 36-40h at 45-55 ℃;
s5, soaking the aluminum silicate fiber-silicon dioxide wet gel composite material treated in the step S4 in n-hexane for 2 hours, then drying the wet gel composite material for 12 hours at 70 ℃, and then further drying the wet gel composite material for 3 hours at 200 ℃ to obtain the aerogel fiber composite material.
2. An indoor non-intumescent fire retardant coating as claimed in claim 1, characterized in that the stirring speed in S1 is 300-500r/min and the hydrochloric acid dropping speed is 1-2 drops/S.
3. The indoor non-intumescent fire retardant coating of claim 1, wherein the aging liquid in S3 is anhydrous ethanol and deionized water according to a ratio of 4:1 by volume ratio.
4. The indoor non-intumescent fire retardant coating according to claim 1, wherein the modifying liquid in S4 is absolute ethyl alcohol, trimethylchlorosilane and n-hexane according to the following formula 1:3:26 by volume ratio.
5. The indoor non-intumescent fire retardant coating of claim 1, wherein said pigment is rutile titanium dioxide.
6. The indoor non-intumescent fire-retardant coating according to claim 1, wherein the auxiliary agent is a film auxiliary agent, a dispersing agent, a defoaming agent, a wetting agent and a water reducing agent which are mixed according to an equal volume ratio, wherein the film auxiliary agent is dodecanol ester, the dispersing agent is a sodium polycarboxylate dispersing agent, the defoaming agent is a paraffin defoaming agent, the wetting agent is a nonionic surfactant, and the water reducing agent is a sodium lignin sulfonate water reducing agent.
7. A process for preparing an indoor non-intumescent fire retardant coating as claimed in any one of claims 1-6, characterized in that the process comprises the steps of:
s1, pouring the potassium magnesium phosphate cementing component and the styrene-acrylic emulsion in parts by weight into a stirring kettle, and stirring at a rotating speed of 800-1000r/min to obtain a base material component;
s2, crushing the aerogel fiber composite material in parts by weight, adding the crushed aerogel fiber composite material into the base material component in the S1, adding the pigment and the auxiliary agent in parts by weight into the system, continuously stirring the mixture at a rotating speed of 1500-1600r/min, and obtaining the indoor non-intumescent fire retardant coating after stirring.
8. The process for preparing the indoor non-intumescent fire retardant coating of claim 7, wherein the stirring time in S1 is 10-15min and the stirring time in S2 is 18-20min.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104910723A (en) * | 2015-06-18 | 2015-09-16 | 黎司华 | Heat-shielding thermal-insulation material |
| KR101941179B1 (en) * | 2018-05-14 | 2019-01-22 | 주식회사 유버스 | Composition for repairing and reinforcing concrete structure comprising high strength mortar, and method of repairing and reinforcing concrete structures using the same |
| CN111171657A (en) * | 2020-02-11 | 2020-05-19 | 荆门市诺维英新材料科技有限公司 | Energy-saving environment-friendly fireproof coating and preparation method thereof |
| CN114436624A (en) * | 2022-01-05 | 2022-05-06 | 江苏恒科新材料有限公司 | Polyester nanofiber/silicon dioxide composite aerogel film and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104910723A (en) * | 2015-06-18 | 2015-09-16 | 黎司华 | Heat-shielding thermal-insulation material |
| KR101941179B1 (en) * | 2018-05-14 | 2019-01-22 | 주식회사 유버스 | Composition for repairing and reinforcing concrete structure comprising high strength mortar, and method of repairing and reinforcing concrete structures using the same |
| CN111171657A (en) * | 2020-02-11 | 2020-05-19 | 荆门市诺维英新材料科技有限公司 | Energy-saving environment-friendly fireproof coating and preparation method thereof |
| CN114436624A (en) * | 2022-01-05 | 2022-05-06 | 江苏恒科新材料有限公司 | Polyester nanofiber/silicon dioxide composite aerogel film and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 气凝胶在建筑保温隔热涂料中的应用研究;徐永飞;;上海涂料(03);全文 * |
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