CN107793083B - Heat-insulating material with anti-corrosion effect - Google Patents
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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Abstract
The invention relates to the technical field of development and manufacturing of heat insulation materials, and discloses a heat insulation material with an anti-corrosion effect, which is prepared from the following components in parts by weight: 40-45 parts of quartz fiber, 20-25 parts of potassium hexatitanate whisker, 14-18 parts of starch solution, 12-15 parts of aerogel silicon dioxide, 10-15 parts of silicone oil, 10-12 parts of amide, 4-6 parts of polyaluminium chloride, 1.0-1.5 parts of glass powder, 0.8-1.0 part of titanium dioxide and 14-20 parts of water.
Description
Technical Field
The invention belongs to the technical field of research and development and manufacturing of heat insulation materials, and particularly relates to a heat insulation material with an anti-corrosion effect.
Background
Thermal insulation materials, materials that retard the transmission of heat flow, are also known as thermal insulation materials. Conventional thermal insulation materials such as glass fiber, asbestos, rock wool, silicate, etc., and novel thermal insulation materials such as aerogel blankets, vacuum panels, etc. The heat insulating materials are classified into three types, namely porous materials, heat reflecting materials and vacuum materials. The former uses the pores in the material itself to insulate heat, because the air or inert gas in the pores has very low thermal conductivity, such as foam material, fiber material, etc., and the heat reflection material has very high reflection coefficient, and can reflect heat out, such as gold, silver, nickel, aluminum foil, or metal-plated polyester, polyimide film, etc. The vacuum insulation material is insulated by blocking convection by using internal vacuum of the material.
In the civil air defense engineering, porous heat insulation materials are mostly used, the void structure determines that the porous heat insulation materials are easy to absorb moisture and damp, especially, the porous heat insulation materials lose part of effects under the action of corrosive liquid and gas, the heat insulation coefficient is enhanced, the existing problem is that the requirement on the fire resistance of the heat insulation materials is high, the corrosion resistance of the heat insulation materials is neglected, the great waste of resources is caused, the heat insulation materials are generally loose in texture, small in heat conductivity coefficient and capable of resisting the change of high and low temperatures, but under the existence of corrosive substances, the physical and chemical properties including mechanical properties of the heat insulation materials are greatly influenced, and the problem of more serious property instability is caused.
Disclosure of Invention
The invention aims to solve the existing problems and provides a heat-insulating material with an anti-corrosion function, which is also anti-corrosion while insulating heat and has the advantages of heat insulation, fire prevention, corrosion prevention, economy and environmental protection.
The invention is realized by the following technical scheme:
the heat insulation material with the anti-corrosion function is prepared from the following components in parts by weight: 40-45 parts of quartz fiber, 20-25 parts of potassium hexatitanate whisker, 14-18 parts of starch solution, 12-15 parts of aerogel silicon dioxide, 10-15 parts of silicone oil, 10-12 parts of amide, 4-6 parts of polyaluminium chloride, 1.0-1.5 parts of glass powder, 0.8-1.0 part of titanium dioxide and 14-20 parts of water, wherein the preparation method comprises the following steps:
(1) separating the conglobated quartz fiber into small conglobates with the diameter of 2-4 mm, adding water for stirring after separation, wherein the stirring speed is 300-400 r/min, the stirring time is 30-40 min, stirring, washing by using a 40-60 mesh sieve, filtering to remove slag balls, and repeatedly processing for 3-5 times to obtain the smoothly dispersed quartz fiber;
(2) calcining aerogel silicon dioxide at the temperature of 850-900 ℃ for 2-3 hours to obtain nano silicon oxide, mechanically stirring and mixing the nano silicon oxide with the potassium hexatitanate whisker, pressing and molding the nano silicon oxide and the potassium hexatitanate whisker under the pressure of 20-30MPa, steaming the nano silicon oxide for 20-30 minutes at the high temperature of 230-250 ℃, and drying the nano silicon oxide at the temperature of 50-60 ℃ to obtain a modified potassium hexatitanate whisker material;
(3) adding the materials prepared in the step (1) and the step (2) into a stirrer, adding starch solution, silicone oil and amide, stirring to form fiber slurry, adding polyaluminum chloride, glass powder and titanium dioxide, continuously stirring for 40-60 minutes, standing for 3-5 hours, performing vacuum suction filtration after flocculation molding, and further drying to constant weight to obtain the heat insulation material.
As a further description of the above scheme, the preparation method of the aerogel silica comprises the following steps:
(1) taking tetraethoxysilane as a raw material, adding 50-60% of ethanol by mass concentration for dissolution, wherein the dosage of the ethanol is 1.5-2.0 times of the mass of the tetraethoxysilane, adding 0.01-0.02% of hydrochloric acid by mass of a system as a catalyst, and the PH value of the hydrochloric acid is 2.5-3.0, and fully stirring at 350 revolutions per minute under 300-0 revolutions per minute after mixing;
(2) placing the stirred solution into a closed constant temperature box, placing at a constant temperature of 60-65 ℃, taking out after gel is generated, placing at room temperature for aging for 36-48 hours, placing the aged alcogel into a drying cylinder of a supercritical dryer, adding absolute ethyl alcohol, immersing the alcogel, reducing the temperature in the dryer to 2-6 ℃, introducing liquid carbon dioxide, and performing solvent replacement;
(3) and when all the water and the alcohol in the alcogel are changed into liquid carbon dioxide, raising the temperature and the pressure of the dryer to: the temperature is 28-30 ℃, the pressure is 7.0-7.2MPa, then carbon dioxide gas is slowly released, and when the temperature and the pressure are reduced to indoor conditions, the aerogel silicon dioxide is obtained.
As a further description of the scheme, the quartz fiber is a continuous fiber formed by melting quartz at 1750-1800 ℃ and drawing the quartz at high speed through a platinum-rhodium alloy bushing, the fiber diameter is in the range of 2-4 microns, and the fiber length is 50-60 mm.
As a further description of the above scheme, the starch solution has a mass fraction of 2-3%.
Compared with the prior art, the invention has the following advantages: in order to solve the problem that the physical and chemical properties of the porous heat-insulating material applied in civil air defense engineering are greatly influenced and the serious unstable property is caused in the presence of corrosive substances, the invention provides the heat-insulating material with the anti-corrosion function, which takes quartz fiber as a base material to prepare the heat-insulating material, improves the anti-corrosion and waterproof properties of the heat-insulating material, and potassium hexatitanate whisker has excellent mechanical property and corrosion resistance but is difficult to attach to the fiber, in particular to a silicon oxide fiber product containing more slag balls. Has the advantages of heat insulation, fire prevention, corrosion prevention, economy and environmental protection.
Detailed Description
The present invention is further illustrated by the following specific examples.
Example 1
The heat insulation material with the anti-corrosion function is prepared from the following components in parts by weight: 40 parts of quartz fiber, 20 parts of potassium hexatitanate whisker, 14 parts of starch solution, 12 parts of aerogel silicon dioxide, 10 parts of silicone oil, 10 parts of amide, 4 parts of polyaluminium chloride, 1.0 part of glass powder, 0.8 part of titanium dioxide and 14 parts of water, wherein the preparation method comprises the following steps:
(1) separating the conglobated quartz fibers into small conglobates with the diameter of 2-4 mm, adding water for stirring at the stirring speed of 300 revolutions per minute for 40 minutes, stirring, washing with a 40-mesh sieve, filtering to remove slag balls, and repeatedly processing for 3 times to obtain the smoothly dispersed quartz fibers;
(2) calcining aerogel silicon dioxide at 850 ℃ for 3 hours to obtain nano silicon oxide, mechanically stirring and mixing the nano silicon oxide with potassium hexatitanate whiskers, performing compression molding under 20MPa, steaming for 20 minutes at high temperature of steam, wherein the temperature of the steam is 230 ℃, and then drying at 50 ℃ to obtain a modified potassium hexatitanate whisker material;
(3) adding the materials prepared in the step (1) and the step (2) into a stirrer, adding starch solution, silicone oil and amide, stirring to form fiber slurry, adding polyaluminum chloride, glass powder and titanium dioxide, continuously stirring for 40 minutes, standing for 3 hours, performing vacuum suction filtration after flocculation forming, and further drying to constant weight to obtain the heat insulation material.
As a further description of the above scheme, the preparation method of the aerogel silica comprises the following steps:
(1) taking tetraethoxysilane as a raw material, adding 50% ethanol by mass concentration for dissolving, wherein the dosage of the ethanol is 1.5 times of that of the tetraethoxysilane, adding 0.01% hydrochloric acid by mass of a system as a catalyst, and the PH value of the hydrochloric acid is 2.5, mixing, and fully stirring at 300 revolutions per minute;
(2) placing the stirred solution into a closed constant temperature box, placing at a constant temperature of 60 ℃, taking out after gel is generated, placing at room temperature for aging for 36 hours, placing the aged alcogel into a drying cylinder of a supercritical dryer, adding absolute ethyl alcohol, immersing the alcogel, reducing the temperature in the dryer to 2 ℃, introducing liquid carbon dioxide, and performing solvent replacement;
(3) and when all the water and the alcohol in the alcogel are changed into liquid carbon dioxide, raising the temperature and the pressure of the dryer to: the temperature is 28 ℃, the pressure is 7.0MPa, then carbon dioxide gas is slowly released, and when the temperature and the pressure are reduced to indoor conditions, the aerogel silicon dioxide is obtained.
As a further description of the scheme, the quartz fiber is a continuous fiber formed by melting quartz at 1750 ℃ and drawing the quartz at high speed through a platinum rhodium alloy bushing, the fiber diameter is in the range of 2-4 microns, and the fiber length is 50-60 mm.
As a further description of the above scheme, the starch solution has a mass fraction of 2%.
Example 2
The heat insulation material with the anti-corrosion function is prepared from the following components in parts by weight: 42 parts of quartz fiber, 22 parts of potassium hexatitanate whisker, 16 parts of starch solution, 13 parts of aerogel silicon dioxide, 12 parts of silicone oil, 11 parts of amide, 5 parts of polyaluminium chloride, 1.2 parts of glass powder, 0.9 part of titanium dioxide and 15 parts of water, wherein the preparation method comprises the following steps:
(1) separating the conglobated quartz fibers into small conglobates with the diameter of 2-4 mm, adding water for stirring at the stirring speed of 350 revolutions per minute for 35 minutes after separation, stirring and washing by using a 50-mesh sieve, filtering to remove slag balls, and repeatedly processing for 4 times to obtain the smoothly dispersed quartz fibers;
(2) calcining aerogel silicon dioxide at 880 ℃ for 2.5 hours to obtain nano silicon oxide, mechanically stirring and mixing the nano silicon oxide with potassium hexatitanate whiskers, pressing the nano silicon oxide and the potassium hexatitanate whiskers to form a shape under 25MPa, steaming the nano silicon oxide for 25 minutes at high temperature of steam, wherein the temperature of the steam is 240 ℃, and then drying the nano silicon oxide at 55 ℃ to obtain a modified potassium hexatitanate whisker material;
(3) adding the materials prepared in the step (1) and the step (2) into a stirrer, adding starch solution, silicone oil and amide, stirring to form fiber slurry, adding polyaluminum chloride, glass powder and titanium dioxide, continuously stirring for 50 minutes, standing for 4 hours, performing vacuum suction filtration after flocculation forming, and further drying to constant weight to obtain the heat insulation material.
As a further description of the above scheme, the preparation method of the aerogel silica comprises the following steps:
(1) adding 55% ethanol by mass concentration into tetraethoxysilane serving as a raw material to dissolve the tetraethoxysilane, wherein the dosage of the ethanol is 1.8 times of the mass of the tetraethoxysilane, adding 0.015% hydrochloric acid by mass of a system serving as a catalyst, and the PH value of the hydrochloric acid is 2.8, mixing, and fully stirring at 320 revolutions per minute;
(2) placing the stirred solution into a closed constant temperature box at a constant temperature of 62 ℃, taking out after gel is generated, aging at room temperature for 42 hours, placing the aged alcogel into a drying cylinder of a supercritical dryer, adding absolute ethyl alcohol, immersing the alcogel, reducing the temperature in the dryer to 4 ℃, introducing liquid carbon dioxide, and performing solvent replacement;
(3) and when all the water and the alcohol in the alcogel are changed into liquid carbon dioxide, raising the temperature and the pressure of the dryer to: the temperature is 29 ℃, the pressure is 7.1MPa, then carbon dioxide gas is slowly released, and when the temperature and the pressure are reduced to indoor conditions, the aerogel silicon dioxide is obtained.
As a further description of the scheme, the quartz fiber is a continuous fiber which is formed by melting quartz at 1780 ℃ and drawing the quartz at high speed through a platinum rhodium alloy bushing, the fiber diameter is in the range of 2-4 microns, and the fiber length is 50-60 mm.
As a further description of the above protocol, the starch solution mass fraction was 2.5%.
Example 3
The heat insulation material with the anti-corrosion function is prepared from the following components in parts by weight: 45 parts of quartz fiber, 25 parts of potassium hexatitanate whisker, 18 parts of starch solution, 15 parts of aerogel silicon dioxide, 15 parts of silicone oil, 12 parts of amide, 6 parts of polyaluminium chloride, 1.5 parts of glass powder, 1.0 part of titanium dioxide and 20 parts of water, wherein the preparation method comprises the following steps:
(1) separating the conglobated quartz fibers into small conglobates with the diameter of 2-4 mm, adding water for stirring at the stirring speed of 400 revolutions per minute for 30 minutes after separation, stirring and washing by using a 60-mesh sieve, filtering to remove slag balls, and repeatedly processing the steps for 5 times to obtain the smoothly dispersed quartz fibers;
(2) calcining aerogel silicon dioxide at 900 ℃ for 2 hours to obtain nano silicon oxide, mechanically stirring and mixing the nano silicon oxide with potassium hexatitanate whiskers, pressing the nano silicon oxide and the potassium hexatitanate whiskers into a mould under the pressure of 30MPa, steaming the nano silicon oxide for 30 minutes at high temperature of steam, wherein the temperature of the steam is 250 ℃, and then drying the nano silicon oxide at the temperature of 60 ℃ to obtain a modified potassium hexatitanate whisker material;
(3) adding the materials prepared in the step (1) and the step (2) into a stirrer, adding starch solution, silicone oil and amide, stirring to form fiber slurry, adding polyaluminum chloride, glass powder and titanium dioxide, continuously stirring for 60 minutes, standing for 5 hours, performing vacuum suction filtration after flocculation forming, and further drying to constant weight to obtain the heat insulation material.
As a further description of the above scheme, the preparation method of the aerogel silica comprises the following steps:
(1) taking tetraethoxysilane as a raw material, adding 60% ethanol by mass concentration for dissolving, wherein the dosage of the ethanol is 2.0 times of that of the tetraethoxysilane, adding 0.02% hydrochloric acid by mass of a system as a catalyst, and the PH value of the hydrochloric acid is 3.0, mixing, and fully stirring at 350 revolutions per minute;
(2) placing the stirred solution into a closed constant temperature box, placing at a constant temperature of 65 ℃, taking out after gel is generated, placing at room temperature for aging for 48 hours, placing the aged alcogel into a drying cylinder of a supercritical dryer, adding absolute ethyl alcohol, immersing the alcogel, reducing the temperature in the dryer to 6 ℃, introducing liquid carbon dioxide, and performing solvent replacement;
(3) and when all the water and the alcohol in the alcogel are changed into liquid carbon dioxide, raising the temperature and the pressure of the dryer to: the temperature is 30 ℃, the pressure is 7.2MPa, then carbon dioxide gas is slowly released, and when the temperature and the pressure are reduced to indoor conditions, the aerogel silicon dioxide is obtained.
As a further description of the above scheme, the quartz fiber is a continuous fiber formed by melting quartz stone at 1800 ℃ and drawing the quartz stone through a platinum rhodium alloy bushing at high speed, the fiber diameter is in the range of 2-4 microns, and the fiber length is 50-60 mm.
As a further description of the above scheme, the starch solution mass fraction is 3%.
Comparative example 1
The only difference from example 1 is that the quartz fiber treatment process of step (1) was omitted and the rest was kept in agreement.
Comparative example 2
The only difference from example 2 is that the modification process of potassium hexatitanate whisker in step (2) was omitted and the rest was kept in agreement.
Comparative example 3
The difference from example 3 is only that the corresponding nano silicon oxide powder is prepared by using a precipitation method as a binding agent with the potassium hexatitanate whisker, and the rest is kept consistent.
Comparative test
The heat insulating materials were prepared by using the compositions of examples 1 to 3 and comparative examples 1 to 3, respectively, and the overall properties of the heat insulating materials were compared with those of the foam glass heat insulating material as a control, and the test results were recorded as shown in the following table:
(wherein the standard of the saturated oxygen index is performed in accordance with GB/T2406-1993)
The experimental results show that: the invention effectively solves the problem that the physical and chemical properties, including mechanical properties, of the porous heat-insulating material applied to civil air defense engineering are greatly influenced and have more serious unstable properties in the presence of corrosive substances.
Claims (4)
1. The heat insulation material with the anti-corrosion function is characterized by being prepared from the following components in parts by weight: 40-45 parts of quartz fiber, 20-25 parts of potassium hexatitanate whisker, 14-18 parts of starch solution, 12-15 parts of aerogel silicon dioxide, 10-15 parts of silicone oil, 10-12 parts of amide, 4-6 parts of polyaluminium chloride, 1.0-1.5 parts of glass powder, 0.8-1.0 part of titanium dioxide and 14-20 parts of water, wherein the preparation method comprises the following steps:
(1) separating the conglobated quartz fiber into small conglobates with the diameter of 2-4 mm, adding water for stirring after separation, wherein the stirring speed is 300-400 r/min, the stirring time is 30-40 min, stirring, washing by using a 40-60 mesh sieve, filtering to remove slag balls, and repeatedly processing for 3-5 times to obtain the smoothly dispersed quartz fiber;
(2) calcining aerogel silicon dioxide at the temperature of 850-900 ℃ for 2-3 hours to obtain nano silicon oxide, mechanically stirring and mixing the nano silicon oxide with the potassium hexatitanate whisker, pressing and molding the nano silicon oxide and the potassium hexatitanate whisker under the pressure of 20-30MPa, steaming the nano silicon oxide for 20-30 minutes at the high temperature of 230-250 ℃, and drying the nano silicon oxide at the temperature of 50-60 ℃ to obtain a modified potassium hexatitanate whisker material;
(3) adding the materials prepared in the step (1) and the step (2) into a stirrer, adding starch solution, silicone oil and amide, stirring to form fiber slurry, adding polyaluminum chloride, glass powder and titanium dioxide, continuously stirring for 40-60 minutes, standing for 3-5 hours, performing vacuum suction filtration after flocculation molding, and further drying to constant weight to obtain the heat insulation material.
2. The corrosion protected thermal insulation material of claim 1, wherein said aerogel silica is prepared by a process comprising the steps of:
(1) taking tetraethoxysilane as a raw material, adding 50-60% of ethanol by mass concentration for dissolution, wherein the dosage of the ethanol is 1.5-2.0 times of the mass of the tetraethoxysilane, adding 0.01-0.02% of hydrochloric acid by mass of a system as a catalyst, and the PH value of the hydrochloric acid is 2.5-3.0, and fully stirring at 350 revolutions per minute under 300-0 revolutions per minute after mixing;
(2) placing the stirred solution into a closed constant temperature box, placing at a constant temperature of 60-65 ℃, taking out after gel is generated, placing at room temperature for aging for 36-48 hours, placing the aged alcogel into a drying cylinder of a supercritical dryer, adding absolute ethyl alcohol, immersing the alcogel, reducing the temperature in the dryer to 2-6 ℃, introducing liquid carbon dioxide, and performing solvent replacement;
(3) and when all the water and the alcohol in the alcogel are changed into liquid carbon dioxide, raising the temperature and the pressure of the dryer to: the temperature is 28-30 ℃, the pressure is 7.0-7.2MPa, then carbon dioxide gas is slowly released, and when the temperature and the pressure are reduced to indoor conditions, the aerogel silicon dioxide is obtained.
3. The heat insulating material with anti-corrosion effect as claimed in claim 1, wherein the quartz fiber is a continuous fiber obtained by melting quartz at 1750 ℃ and 1800 ℃ and drawing the quartz through a platinum rhodium alloy bushing at a high speed, the fiber diameter is in the range of 2-4 microns, and the fiber length is in the range of 50-60 mm.
4. The corrosion-resistant insulating material according to claim 1, wherein the starch solution is present in an amount of 2 to 3% by weight.
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| CN109400011B (en) * | 2018-11-23 | 2021-05-07 | 航天特种材料及工艺技术研究所 | Material for nano heat-insulating material, mixing method of material, nano heat-insulating material and preparation method of nano heat-insulating material |
| CN110078486A (en) * | 2019-04-29 | 2019-08-02 | 江苏辉迈粉体科技有限公司 | A kind of preparation method of quartz fibre |
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| CN104513041A (en) * | 2013-09-29 | 2015-04-15 | 佛山市顺德区北航先进技术产业基地有限公司 | Inorganic fiber reinforced heat insulation board |
| CN104231917A (en) * | 2014-10-13 | 2014-12-24 | 北京国泰瑞华精藻硅特种材料有限公司 | Nanometer high temperature resistant thermal insulation and prevention coating |
| CN104671737A (en) * | 2015-02-11 | 2015-06-03 | 杭州钱江称重技术有限公司 | High temperature thermal insulation material for tank number of torpedo cars |
| CN105967635A (en) * | 2016-05-06 | 2016-09-28 | 陈昌 | Composite light heat insulation material and preparation method thereof |
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Denomination of invention: A kind of heat insulation material with anti-corrosion function Effective date of registration: 20220506 Granted publication date: 20200929 Pledgee: Funan SME financing Company limited by guarantee Pledgor: FUNAN MINAN CIVIL AIR DEFENSE ENG EQUIPMENT Co.,Ltd. Registration number: Y2022980004756 |