CN110643151A - Barium strontium titanate modified epoxy resin light heat insulation material and preparation method and application thereof - Google Patents
Barium strontium titanate modified epoxy resin light heat insulation material and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to the technical field of high-strength low-thermal-conductivity-coefficient epoxy resin-based heat insulation materials, in particular to a barium strontium titanate modified epoxy resin light heat insulation material and a preparation method and application thereof; the composition comprises the following substances in parts by weight based on 100 parts: 75-93 parts of epoxy resin, 5-20 parts of barium strontium titanate, 1-3 parts of curing agent and 1-3 parts of accelerator; according to the invention, the nanometer barium strontium titanate is used as the filler to reduce the thermal conductivity of the epoxy resin, and simultaneously, the mechanical property of the epoxy resin is obviously enhanced, the nanometer barium strontium titanate with low thermal conductivity is used for replacing large-diameter glass beads as the epoxy resin filler, so that the low thermal conductivity is realized, the high mechanical property of the epoxy resin is maintained, the optimal filling proportion of the nanometer barium strontium titanate filler is optimized on the basis, and the balance between the optimal mechanical property and the lowest thermal conductivity is realized, therefore, the composite material can be widely applied to the fields of heat transmission pipeline supports, baffles on heat transmission pipelines and heat insulation of deepwater pipelines.
Description
Technical Field
The invention relates to the technical field of high-strength low-thermal-conductivity-coefficient epoxy resin-based heat insulation materials, in particular to a barium strontium titanate modified epoxy resin light heat insulation material and a preparation method and application thereof.
Background
In recent years, resin-based lightweight heat-insulating composite materials have a series of outstanding advantages of high specific strength, high specific modulus, low density, designability and processability, and are highly valued. At present, a fixed support or a sliding support of a heat transmission pipeline for transmitting steam or hot water is generally made of steel, the heat transmission pipeline support and a baffle on the heat transmission pipeline are in direct contact with a basic steel support or a concrete support, and the steam or the hot water in a heat transmission steel pipe transmits heat to the support through the baffle on the heat transmission steel pipe and the fixed support, so that a heat bridge is formed for transmission, and heat loss is caused. Because the fixed bolster of steam or hot water pipeline will satisfy the requirement of pipeline rigidity and intensity under two kinds of cold and hot running condition simultaneously, set up a large amount of pipeline support on the pipeline transportation line generally, the heat bridge transfer effect of support has directly caused the thermal a large amount of losses in the pipeline. The main reason for the heat-bridge phenomenon of the heat-transporting pipeline is that the strength of the heat-insulating material used in the support is not high, and the heat-insulating material is easy to age under the combined action of the acting force of the pipeline expanding with heat and contracting with cold and the high temperature, and the aged heat-insulating material forms a strong heat-bridge transfer effect, so that the heat energy of the heat medium in the heat-transporting pipeline is greatly lost.
The organic heat insulation material has the characteristics of low heat conductivity coefficient and high specific strength, and is an ideal candidate for manufacturing high-strength heat insulation materials, but the temperature resistance of the organic heat insulation material is generally low and generally does not exceed 150 ℃, so the organic heat insulation material cannot be directly used in high-temperature heat transmission pipelines and bases; the inorganic material has the advantage of high temperature resistance, but has the defect of high water absorption; the epoxy vinyl ester-filled light heat-insulating composite plastic prepared by combining the epoxy vinyl ester and the hollow glass bead serving as the filling matrix can overcome respective defects, the epoxy vinyl ester-filled light-insulating composite plastic has excellent heat-insulating performance, but the hollow glass bead serving as the filling matrix can cause the reduction of the mechanical property of the epoxy vinyl ester, mainly because the particle size of the hollow glass bead is generally 20-55 um, and the introduction of fillers with larger particle sizes causes the reduction of the connection degree in the epoxy ester, so that the mechanical property of the epoxy ester is remarkably reduced.
Disclosure of Invention
The purpose of the invention is: the barium strontium titanate modified epoxy resin light heat-insulating material overcomes the defects in the prior art, remarkably improves the mechanical property and bending property of epoxy resin, and remarkably reduces the heat conductivity coefficient of the heat-insulating material.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the barium strontium titanate modified epoxy resin light heat insulating material comprises the following substances in parts by weight of 100: 75-93 parts of epoxy resin, 5-20 parts of barium strontium titanate, 1-3 parts of curing agent and 1-3 parts of accelerator.
The organic heat insulation material has the characteristics of low heat conductivity coefficient and high specific strength, and is an ideal candidate for manufacturing high-strength heat insulation materials, but the temperature resistance of the organic heat insulation material is generally low and generally does not exceed 150 ℃, so the organic heat insulation material cannot be directly used in high-temperature heat transmission pipelines and bases; the inorganic material has the advantage of high temperature resistance, but has the defect of high water absorption; the invention aims to combine the advantages of the organic matter and the inorganic composite material to obtain the light heat-insulating material with high temperature resistance, high heat-insulating efficiency and high strength. According to the requirements, the epoxy resin is used as a basic material, the barium strontium titanate material with ultralow heat conductivity coefficient is added, and the epoxy resin composite heat-insulating material is formed by adjusting the proportion of the components.
Further, the barium strontium titanate is nano-grade barium strontium titanate with low thermal conductivity. The nanometer barium strontium titanate filler can obviously improve the mechanical property of the epoxy ester, the nanometer barium strontium titanate filler can obviously reduce the heat conductivity coefficient of the epoxy ester light composite heat-insulating material, the usage amount of the nanometer barium strontium titanate filler in the epoxy ester is far lower than that of other fillers, and the nanometer barium strontium titanate filler can obviously improve the bending property of the epoxy ester composite material.
Further, the thermal conductivity of the nano-scale barium strontium titanate with low thermal conductivity is 0.106W/(m.K).
Further, the barium strontium titanate has an average particle size of 0.2 μm to 1 μm.
Furthermore, the curing agent is an anhydride curing agent, preferably methyl hydrogen phthalic anhydride, the number of hydrogen atoms in the methyl hydrogen phthalic anhydride is selected by a conventional means, and the number of the hydrogen atoms is not required in the invention.
Furthermore, the accelerator is imidazole accelerator, preferably imidazole.
Further, the barium strontium titanate is prepared by a one-pot method.
A preparation method of a barium strontium titanate modified epoxy resin light heat insulation material is characterized by comprising the following steps: the preparation method comprises the following steps:
s1, weighing the following raw materials: 75-93 parts of epoxy resin, 5-20 parts of barium strontium titanate, 1-3 parts of curing agent and 1-3 parts of accelerator
S2, putting the epoxy resin and the barium strontium titanate into a stirrer, and stirring to uniformly mix the epoxy resin and the barium strontium titanate;
s3, adding a curing agent and an accelerator into the mixture, and uniformly stirring;
s4, heating to 80-150 ℃, heating for 5-50min, and pressurizing to solidify the mixture to obtain the high-strength barium strontium titanate modified epoxy resin light heat insulation material with ultralow heat conductivity coefficient.
Further, the pressure for curing the mixture is 0.5-10 Pa by pressurizing in the step S4, the strength of the barium strontium titanate modified epoxy resin light heat insulating material prepared in the step S4 is 76.91 MPa,
the thermal conductivity is 0.25-0.8 (W/(m.K)).
An application of barium strontium titanate modified epoxy resin light heat insulation material in heat transmission pipelines and heat transmission pipeline bases.
The technical scheme adopted by the invention has the beneficial effects that:
according to the invention, the nano barium strontium titanate is used as the filler to reduce the thermal conductivity of the epoxy resin and simultaneously remarkably enhance the mechanical property of the epoxy resin, the nano barium strontium titanate with low thermal conductivity is used for replacing large-diameter glass beads as the epoxy resin filler, so that the low thermal conductivity is realized, the high mechanical property of the epoxy resin is maintained, and the optimal filling proportion of the nano barium strontium titanate filler is optimized on the basis, so that the balance between the optimal mechanical property and the lowest thermal conductivity is realized. Therefore, the nano barium strontium titanate filler prepared by the invention and the epoxy ester light heat insulation composite material with the optimized optimal filling proportion can be widely applied to the fields of heat transmission pipeline supports, baffles on heat transmission pipelines and deep water pipeline heat insulation, and have potential good economic benefits.
The invention adopts the nano barium strontium titanate as the filler, can also obviously improve the bending property of the epoxy ester composite material, and compared with other fillers, the invention achieves the same degree of mechanical property and low heat conductivity coefficient, the usage amount of the nano barium strontium titanate is lower, the addition amount of the filler in the prior art is generally 20-50 vol%, and the addition amount is as low as 20 wt%.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is an SEM image of barium strontium titanate in the present invention;
FIG. 2 is an SEM image of an epoxy;
FIG. 3 is a graph showing the relationship between the density of the epoxy resin lightweight thermal insulation composite material and the mass fraction of barium strontium titanate;
FIG. 4.1 is an SEM image of a 5% barium strontium titanate modified epoxy resin light heat insulating material;
FIG. 4.2 is an SEM image of a 10% barium strontium titanate modified epoxy resin light heat insulating material;
FIG. 4.3 is an SEM image of a 20% barium strontium titanate modified epoxy resin light heat insulating material;
FIG. 5 is a stress-strain curve of an epoxy resin lightweight insulation composite;
FIG. 6 is a graph showing the relationship between the density and the compression performance of the epoxy resin light heat-insulating composite material;
FIG. 7 is a graph of bending stress strain for an epoxy lightweight insulation composite;
fig. 8 is a line graph of thermal conductivity and barium strontium titanate filling amount of the epoxy resin light-weight thermal insulation composite material.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Referring to fig. 1 to 8, fig. 1 is an SEM image of barium strontium titanate according to the present invention;
FIG. 2 is an SEM image of an epoxy;
FIG. 3 is a graph showing the relationship between the density of the epoxy resin lightweight thermal insulation composite material and the mass fraction of barium strontium titanate;
FIG. 4.1 is an SEM image of a 5% barium strontium titanate modified epoxy resin light heat insulating material;
FIG. 4.2 is an SEM image of a 10% barium strontium titanate modified epoxy resin light heat insulating material;
FIG. 4.3 is an SEM image of a 20% barium strontium titanate modified epoxy resin light heat insulating material;
FIG. 5 is a stress-strain curve of an epoxy resin lightweight insulation composite;
FIG. 6 is a graph showing the relationship between the density and the compression performance of the epoxy resin light heat-insulating composite material;
FIG. 7 is a graph of bending stress strain for an epoxy lightweight insulation composite;
fig. 8 is a line graph of thermal conductivity and barium strontium titanate filling amount of the epoxy resin light-weight thermal insulation composite material.
The curing agent in the invention is methyl hydrogen phthalic anhydride, and the accelerant is imidazole. In the invention
Example 1
5% barium strontium titanate modified epoxy resin light heat insulation material
The barium strontium titanate modified epoxy resin light heat insulating material comprises the following substances in parts by weight of 100: 89 parts of epoxy resin, 5 parts of barium strontium titanate, 3 parts of curing agent and 3 parts of accelerator.
Wherein, the barium strontium titanate is nano-grade barium strontium titanate with low thermal conductivity coefficient; the average grain size of the barium strontium titanate is 500nm, the barium strontium titanate is prepared by adopting a one-pot method, and the nano-grade barium strontium titanate can be prepared by a simple sol-gel method at room temperature. The SEM is shown in FIG. 1.
The preparation method of the barium strontium titanate modified epoxy resin light heat insulation material comprises the following steps:
s1, weighing the following raw materials: 89 parts of epoxy resin, 5 parts of barium strontium titanate, 3 parts of curing agent and 3 parts of accelerator;
s2, putting the epoxy resin and the barium strontium titanate into a stirrer, and stirring to uniformly mix the epoxy resin and the barium strontium titanate;
s3, adding a curing agent and an accelerator into the mixture, and uniformly stirring;
and S4, heating to 120 ℃, heating for 30min, and pressurizing to 8MPa to solidify the mixture to obtain the barium strontium titanate modified epoxy resin light heat-insulating material.
Example 2
10% barium strontium titanate modified epoxy resin light heat insulation material
The barium strontium titanate modified epoxy resin light heat insulating material comprises the following substances in parts by weight of 100: 84 parts of epoxy resin, 10 parts of barium strontium titanate, 3 parts of curing agent and 3 parts of accelerator.
Wherein, the barium strontium titanate is nano-grade barium strontium titanate with low thermal conductivity coefficient; the average grain size of the barium strontium titanate is 500nm, the barium strontium titanate is prepared by adopting a one-pot method, and the nano-grade barium strontium titanate can be prepared by a simple sol-gel method at room temperature. The SEM is shown in FIG. 1.
The preparation method of the barium strontium titanate modified epoxy resin light heat insulation material comprises the following steps:
s1, weighing the following raw materials: 84 parts of epoxy resin, 10 parts of barium strontium titanate, 3 parts of curing agent and 3 parts of accelerator;
s2, putting the epoxy resin and the barium strontium titanate into a stirrer, and stirring to uniformly mix the epoxy resin and the barium strontium titanate;
s3, adding a curing agent and an accelerator into the mixture, and uniformly stirring;
and S4, heating to 120 ℃, heating for 30min, and pressurizing to 8MPa to solidify the mixture to obtain the barium strontium titanate modified epoxy resin light heat-insulating material.
Example 3
20% barium strontium titanate modified epoxy resin light heat insulating material
The barium strontium titanate modified epoxy resin light heat insulating material comprises the following substances in parts by weight of 100: 75 parts of epoxy resin, 20 parts of barium strontium titanate, 3 parts of curing agent and 2 parts of accelerator.
Wherein, the barium strontium titanate is nano-grade barium strontium titanate with low thermal conductivity coefficient; the average grain size of the barium strontium titanate is 500nm, the barium strontium titanate is prepared by adopting a one-pot method, and the nano-grade barium strontium titanate can be prepared by a simple sol-gel method at room temperature. The SEM is shown in FIG. 1.
The preparation method of the barium strontium titanate modified epoxy resin light heat insulation material comprises the following steps:
s1, weighing the following raw materials: 75 parts of epoxy resin, 20 parts of barium strontium titanate, 3 parts of curing agent and 2 parts of accelerator;
s2, putting the epoxy resin and the barium strontium titanate into a stirrer, and stirring to uniformly mix the epoxy resin and the barium strontium titanate;
s3, adding a curing agent and an accelerator into the mixture, and uniformly stirring;
and S4, heating to 120 ℃, heating for 30min, and pressurizing to 8MPa to solidify the mixture to obtain the barium strontium titanate modified epoxy resin light heat-insulating material.
Comparative example
0 wt.% barium strontium titanate modified epoxy resin light heat insulation material
The barium strontium titanate modified epoxy resin light heat insulating material comprises the following substances in parts by weight of 100: 95 parts of epoxy resin, 3 parts of curing agent and 2 parts of accelerator.
The barium strontium titanate modified epoxy resin light heat insulating material is applied to heat transmission pipelines and heat transmission pipeline bases.
In the preparation method of the barium strontium titanate modified epoxy resin light heat insulation material, S1, S2 and S3 are operated at normal temperature.
The influence of the addition amount of barium strontium titanate in the light heat-insulating composite material on the density, compressive strength, bending stress and thermal conductivity of the material is shown in figures 3-8.
FIG. 3 is a graph showing the variation of the density of the lightweight thermal insulation composite material according to the present invention, and it can be seen from FIG. 3 that the density of the lightweight thermal insulation composite material decreases linearly with the increase of the barium strontium titanate filling amount, and when the barium strontium titanate filling amount increases from 5wt.% to 20 wt.%, the density of the material increases from 1.005 g/cm3Reduced to 0.743 g/cm3The density was reduced by 26.10%.
Fig. 4.1, 4.2 and 4.3 show the light-weight, heat-insulating and high-strength epoxy resin material with different filling amounts of nano-sized barium strontium titanate, and from SEM images, it can be seen that the barium strontium titanate is better dispersed in the epoxy resin and better contacted with the epoxy resin as the content of the barium strontium titanate increases, which indicates that the density of the epoxy resin will be sequentially reduced as the content of the barium strontium titanate increases, and the result is consistent with fig. 3.
The four groups of samples of the light heat-insulating composite materials prepared in examples 1 to 3 and the comparative example were tested for compression performance, and a universal mechanical testing machine was used for the compression performance test, so that the stress-strain curve of the epoxy resin light heat-insulating composite material is shown in fig. 5. As can be seen in fig. 5, the stress-strain curves of the four groups of samples all exhibit a distinct linear elastic segment at the initial stage; when the strain reaches about 5%, the slope of the stress-strain curve is sharply reduced, because the barium strontium titanate in the epoxy resin light heat-insulating composite material begins to debond at the moment, cracks begin to appear in a material system, and the compressive strength of the resin-based light-insulating composite material is continuously reduced along with the increase of the filling amount of the barium strontium titanate. This is because the strength of barium strontium titanate is lower than that of the resin matrix, and thus the compressive strength tends to decrease as the mass fraction of barium strontium titanate increases. It can be seen from fig. 5 that, as the filling amount of barium strontium titanate increases, the slope of the linear region of the stress-strain curve of the epoxy resin lightweight thermal insulation composite material decreases. This is because the rigidity of barium strontium titanate is better than that of the resin matrix, and when the filling amount of barium strontium titanate is increased, the performance of the light heat-insulating composite material is close to that of barium strontium titanate, so that the compressive yield strain becomes small.
FIG. 6 is a graph showing the relationship between the density and the compression performance of barium strontium titanate filled epoxy resin based lightweight thermal insulation composite material with different filling amounts. From fig. 6, it can be seen that the compressive property of the epoxy resin-based lightweight thermal insulation composite material shows a significant trend of increasing with increasing density. The reason is that the density is increased, the interface combination of the composite material matrix and the barium strontium titanate is better, the resin layer between the barium strontium titanate and the barium strontium titanate in the material system is thickened, and the compressive strength of the material is increased. In engineering application, composite materials with lower density and higher strength are expected, but the density and the strength of the resin-based lightweight composite material are a set of spears, and the key technology is how to balance the density and the strength to ensure that the performance of the epoxy resin-based lightweight thermal insulation composite material is optimal.
The bending mechanical properties of four groups of light heat-insulating composite material samples prepared in examples 1-3 and comparative example are tested and analyzed, and the bending properties of the epoxy resin-based light heat-insulating composite material are tested according to GB/T8812.1-2007C. And (3) calculating the bending strength and the bending elastic modulus of the epoxy resin-based light heat-insulating composite material through bending tests, and establishing the relationship between the bending modulus of the epoxy resin-based light heat-insulating composite material and the filling amount of the glass beads. Four groups of samples with different barium strontium titanate contents are prepared into bending samples respectively, the four groups of samples are subjected to bending experiments respectively, and the stress-strain curve of the epoxy resin-based lightweight thermal insulation composite material is shown in figure 7 along with the change of the barium strontium titanate content through testing. Fig. 7 shows the influence of the barium strontium titanate loading on the bending performance of the material. It can be obtained from fig. 7 that in the relationship of the bending stress-strain curves of the materials with different barium strontium titanate filling amounts, the stress-strain curves of the material fracture all increase linearly, the material deforms elastically, and when the bending strength of the composite material is reached, the material fractures, which indicates that the bending fracture of the epoxy resin-based lightweight thermal insulation composite material is brittle fracture, and it can also be found from fig. 7 that the bending strength of the epoxy resin-based lightweight thermal insulation composite material decreases with the increase of the barium strontium titanate filling amount, and the slope of the stress-strain curve decreases, which indicates that the bending resistance decreases with the increase of the barium strontium titanate filling amount.
The thermal conductivity of four groups of samples of the lightweight thermal insulation composites prepared in examples 1 to 3 and comparative example was examined and analyzed, and it can be seen from fig. 8 that the thermal conductivity of the epoxy resin-based lightweight thermal insulation composite showed a nearly linear decrease trend with increasing the filling amount of barium strontium titanate, and the thermal conductivity of the initial pure resin was 0.226W/(m.k), and the thermal conductivity of the epoxy resin-based lightweight thermal insulation composite was 0.213W/(m.k), 0.145W/(m.k), 0.097W/(m.k) and 0.074W/(m.k), respectively, with increasing the mass fraction of barium strontium titanate, when the filling amount reached 20 wt.%, the thermal conductivity was decreased by 31.0% compared with that of the pure resin casting, the reduction of the thermal conductivity indicates that the thermal insulation performance of the epoxy resin-based light thermal insulation composite material is improved.
Example 4
The barium strontium titanate modified epoxy resin light heat insulating material comprises the following substances in parts by weight of 100: 93 parts of epoxy resin, 5 parts of barium strontium titanate, 1 part of curing agent and 1 part of accelerator.
Wherein, the barium strontium titanate is nano-grade barium strontium titanate with low thermal conductivity coefficient; the average grain size of the barium strontium titanate is 500nm, the barium strontium titanate is prepared by adopting a one-pot method, and the nano-grade barium strontium titanate can be prepared by a simple sol-gel method at room temperature. The SEM is shown in FIG. 1.
The preparation method of the barium strontium titanate modified epoxy resin light heat insulation material comprises the following steps:
s1, weighing the following raw materials: 93 parts of epoxy resin, 5 parts of barium strontium titanate, 1 part of curing agent and 1 part of accelerator;
s2, putting the epoxy resin and the barium strontium titanate into a stirrer, and stirring to uniformly mix the epoxy resin and the barium strontium titanate;
s3, adding a curing agent and an accelerator into the mixture, and uniformly stirring;
and S4, heating to 80 ℃, heating for 50min, and pressurizing to 10MPa to solidify the mixture to obtain the barium strontium titanate modified epoxy resin light heat-insulating material.
Example 5
The barium strontium titanate modified epoxy resin light heat insulating material comprises the following substances in parts by weight of 100: 76 parts of epoxy resin, 18 parts of barium strontium titanate, 3 parts of curing agent and 3 parts of accelerator.
Wherein, the barium strontium titanate is nano-grade barium strontium titanate with low thermal conductivity coefficient; the average grain size of the barium strontium titanate is 500nm, the barium strontium titanate is prepared by adopting a one-pot method, and the nano-grade barium strontium titanate can be prepared by a simple sol-gel method at room temperature. The SEM is shown in FIG. 1.
The preparation method of the barium strontium titanate modified epoxy resin light heat insulation material comprises the following steps:
s1, weighing the following raw materials: 76 parts of epoxy resin, 18 parts of barium strontium titanate, 3 parts of curing agent and 3 parts of accelerator;
s2, putting the epoxy resin and the barium strontium titanate into a stirrer, and stirring to uniformly mix the epoxy resin and the barium strontium titanate;
s3, adding a curing agent and an accelerator into the mixture, and uniformly stirring;
and S4, heating to 150 ℃, heating for 5min, and pressurizing to 0.5MPa to solidify the mixture to obtain the barium strontium titanate modified epoxy resin light heat-insulating material.
The thermal conductivity and mechanical properties of the light heat insulating materials in examples 4 and 5 were measured, and the results were: the heat conductivity coefficient and the mechanical property are both superior to those of the heat insulating material in the prior art.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A barium strontium titanate modified epoxy resin light heat insulation material is characterized in that: the composition comprises the following substances in parts by weight based on 100 parts: 75-93 parts of epoxy resin, 5-20 parts of barium strontium titanate, 1-3 parts of curing agent and 1-3 parts of accelerator.
2. The barium strontium titanate modified epoxy resin light heat insulating material of claim 1, which is characterized in that: the barium strontium titanate is nano-grade barium strontium titanate with low thermal conductivity.
3. The barium strontium titanate modified epoxy resin light heat insulating material according to claim 2, characterized in that: the thermal conductivity of the nano-grade barium strontium titanate with low thermal conductivity is 0.106W/(m.K).
4. The barium strontium titanate modified epoxy resin light heat insulating material of claim 1, which is characterized in that: the average grain size of the barium strontium titanate is 0.2-1 μm.
5. The barium strontium titanate modified epoxy resin light heat insulating material of claim 1, which is characterized in that: the curing agent is an anhydride curing agent.
6. The barium strontium titanate modified epoxy resin light heat insulating material of claim 1, which is characterized in that: the accelerant is an imidazole accelerant.
7. The barium strontium titanate modified epoxy resin light heat insulating material of claim 1, which is characterized in that: the barium strontium titanate is prepared by a one-pot method.
8. A preparation method of a barium strontium titanate modified epoxy resin light heat insulation material is characterized by comprising the following steps: the preparation method comprises the following steps:
s1, weighing the following raw materials: 75-93 parts of epoxy resin, 5-20 parts of barium strontium titanate, 1-3 parts of curing agent and 1-3 parts of accelerator
S2, putting the epoxy resin and the barium strontium titanate into a stirrer, and stirring to uniformly mix the epoxy resin and the barium strontium titanate;
s3, adding a curing agent and an accelerator into the mixture, and uniformly stirring;
s4, heating to 80-150 ℃, heating for 5-50min, and pressurizing to solidify the mixture to obtain the high-strength barium strontium titanate modified epoxy resin light heat insulation material with ultralow heat conductivity coefficient.
9. The method for preparing the barium strontium titanate modified epoxy resin light heat insulating material according to claim 8, which is characterized in that: the pressure for curing the mixture is 0.5-10 Pa by pressurizing in the step S4, the strength of the barium strontium titanate modified epoxy resin light heat-insulating material prepared in the step S4 is 76.91 Mpa,
the thermal conductivity is 0.25-0.8 (W/(m.K)).
10. Use of the barium strontium titanate modified epoxy resin lightweight thermal insulation material according to any one of claims 1 to 9 in heat transmission pipelines and bases of heat transmission pipelines.
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| CN201910993385.9A CN110643151A (en) | 2019-10-18 | 2019-10-18 | Barium strontium titanate modified epoxy resin light heat insulation material and preparation method and application thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150183952A1 (en) * | 2013-12-27 | 2015-07-02 | Taiwan Union Technology Corporation | Resin composition and uses of the same |
| CN107686657A (en) * | 2016-08-04 | 2018-02-13 | 深圳光启高等理工研究院 | A kind of prepreg and preparation method thereof |
| CN107868398A (en) * | 2016-09-23 | 2018-04-03 | 深圳先进技术研究院 | A kind of electric slurry, preparation method and application |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150183952A1 (en) * | 2013-12-27 | 2015-07-02 | Taiwan Union Technology Corporation | Resin composition and uses of the same |
| CN107686657A (en) * | 2016-08-04 | 2018-02-13 | 深圳光启高等理工研究院 | A kind of prepreg and preparation method thereof |
| CN107868398A (en) * | 2016-09-23 | 2018-04-03 | 深圳先进技术研究院 | A kind of electric slurry, preparation method and application |
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Application publication date: 20200103 |