CN107022195B - High-damping silica gel mud, composite material containing high-damping silica gel mud, and preparation method and application of composite material - Google Patents
High-damping silica gel mud, composite material containing high-damping silica gel mud, and preparation method and application of composite material Download PDFInfo
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Abstract
The invention discloses high-damping silica gel mud, a composite material containing the high-damping silica gel mud, and a preparation method and application of the composite material, wherein the high-damping silica gel mud is prepared from the following components in parts by weight: low crosslinking degree silica gel mud, 30-80 parts of piezoelectric powder and 0.1-25 parts of conductive powder; the low-crosslinking-degree silica gel cement is prepared from phenyl hydroxyl silicone oil, boric acid and organic carboxylic acid in a mass ratio of 100: 0.1-15: 3 through hybridization. By introducing boron hydroxyl and phenyl on a silicon rubber molecular chain, a hydrogen bond effect is formed by doping organic carboxylic acid, and the material can be continuously broken and recombined to absorb energy when being subjected to external force, so that the material has good self-healing performance; the introduction of boron atoms in the main chain of the silicon rubber destroys the regularity of the molecular chain of the silicon rubber, changes the glass transition temperature and widens the damping temperature range; can meet the requirements of vibration reduction and durability in the fields of aerospace, precision instruments and the like.
Description
Technical Field
The invention relates to a silicone rubber material, in particular to high-damping silica gel mud, a composite material containing the high-damping silica gel mud, and a preparation method and application of the composite material.
Background
With the development of industrial science and technology, the harm of vibration and noise to the production and life of human beings is increasingly serious, and the adoption of damping materials is an effective measure for shock absorption and noise reduction. Good damping materials can effectively absorb the mechanical energy of vibration and convert it into heat energy and the like for dissipation, thereby reducing the adverse effects of vibration and noise. The damping performance of a material is generally evaluated by the maximum damping loss factor and the temperature range of the loss factor greater than 0.3. The silicon system material is an important damping material in the high-end fields of aerospace, precision instruments and the like due to good molecular chain flexibility and excellent high and low temperature performance.
However, the common silicone rubber has a low loss factor, generally not exceeding 0.1, and is difficult to meet the practical use requirement as a damping material. Moreover, since the glass transition temperatures of rubbers are substantially below room temperature and do not differ from each other so much, the improvement in damping properties (particularly above room temperature) is limited. Although the glass transition temperature of the plastic is above room temperature, the plastic can be blended with rubber to improve the damping performance below room temperature, but the damping capacity above room temperature is still low due to the limitation of the damping property of the plastic, and the requirement of practical application cannot be met. In addition, the literature reports that the damping performance of the silicone rubber is improved by changing the molecular chain structure of the silicone rubber to improve the internal friction of the molecular chain. However, the maximum loss factor of the modified silicon system material reported at present is not too high, and the modified silicon system material has no self-healing performance, and once the modified silicon system material is damaged, the modified silicon system material cannot be continuously used, and the durability and the practicability of the material cannot meet the requirements of the fields of aerospace, precision instruments and the like.
In the prior art, for example, a chinese patent with publication number CN103554924A discloses an addition type silicone damping material and a preparation method thereof, which uses a common preparation method of addition type silicone rubber, the damping silicone rubber obtained by adding vinyl silicone oil and hydrogen-containing silicone oil has a maximum loss factor of about 0.58, has no self-healing performance, and cannot meet the requirements of some fields such as aerospace, precision instruments and the like.
Chinese patent publication No. CN101962480A discloses a high damping material based on low phenyl silicone rubber, which is a silicone rubber damping material prepared by high temperature vulcanization of low phenyl silicone rubber and peroxide vulcanizing agent, and has a maximum loss factor of about 0.33, no self-healing property, and fails to meet the requirements in the fields of aerospace, precision instruments, and the like.
Chinese patent publication No. CN102002238A discloses a high damping material based on high phenyl silicone rubber, which is a silicone rubber damping material prepared by high temperature vulcanization of high phenyl silicone rubber and peroxide vulcanizing agent, and has a maximum loss factor of about 0.5, no self-healing property, and similarly can not meet the requirements in the fields of aerospace, precision instruments, and the like.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide the high-damping silica gel cement and the preparation method and the application thereof; the invention also aims to provide a composite material containing the high-damping silica gel cement, and a preparation method and application thereof.
The technical scheme of the invention is as follows:
the high-damping silica gel mud is prepared from the following components in parts by weight:
100 portions of low crosslinking degree silica gel cement
30-80 parts of piezoelectric powder
0.1 to 25 portions of conductive powder,
the low-crosslinking-degree silica gel cement is prepared from phenyl hydroxyl silicone oil, boric acid and organic carboxylic acid in a mass ratio of 100: 0.1-15: 3 through hybridization.
In a further scheme, the phenyl group mass percent of the phenyl hydroxyl silicone oil is 15-35%
In a further scheme, the organic carboxylic acid is one or more of caprylic acid, lauric acid, stearic acid and arachidic acid.
In a further scheme, the piezoelectric powder is lead zirconate titanate.
In a further scheme, the conductive powder is one or more of graphene, carbon nano tubes and acetylene black.
The second invention aims to provide a composite material containing the high-damping silica gel mud, which is prepared from the following components in parts by weight:
100 portions of high damping silica gel cement
0 to 100 portions of elastomer
0.1-5 parts of vulcanizing agent.
In a further scheme, the elastomer is one or more of TPEE, nitrile rubber, styrene butadiene rubber and butyl rubber; the vulcanizing agent is one or more of benzoyl peroxide, di-tert-butylperoxy diisopropylbenzene, di-tert-butylperoxy hexane, 2, 4-dichlorobenzoyl peroxide and dicumyl peroxide.
The third invention of the invention is to provide a preparation method of the composite material containing the high damping silica gel cement, which comprises the following steps:
1) preparing the low-crosslinking-degree silica gel mud: firstly, 100 parts of phenyl hydroxyl silicone oil and 0.1-15 parts of boric acid are placed in a kneader and react at the temperature of 160-200 ℃ to prepare silica gel containing boron hydroxyl and phenyl, and then 0.1-5 parts of organic carboxylic acid is doped for hybridization to prepare silica gel with low crosslinking degree;
2) preparing high-damping silica gel mud: uniformly mixing 100 parts of low-crosslinking-degree silica gel paste, 30-150 parts of piezoelectric powder and 0.1-25 parts of conductive powder by an open mill to obtain high-damping silica gel paste;
3) preparing a composite material: mixing 100 parts of high-damping silica gel cement, 0-100 parts of elastomer and 0.1-5 parts of vulcanizing agent, uniformly mixing by an open mill, and pressing a plate by a flat vulcanizing instrument at the pressure of 15MPa-30MPa and the temperature of 100-180 ℃ to prepare the self-healing composite material.
A fourth object of the present invention is to provide the use of the above high damping silica gel paste as a bumper or a filler of a damper for a vehicle.
The fifth invention aims to provide the application of the composite material containing the high-damping silica gel cement, and the composite material is used for manufacturing vibration reduction devices of aerospace, motor cars or precision instruments.
According to the invention, boron hydroxyl and phenyl are introduced into a silicon rubber molecular chain, and organic carboxylic acid is used for doping, wherein carboxyl and hydroxyl can form a hydrogen bond function, and the hydroxyl can form a hydrogen bond function.
The hydrogen bonds among the silicon rubber molecular chains can be continuously broken and recombined when being acted by external force, so that the energy is absorbed, and the material has good self-healing performance; the large steric hindrance phenyl side group carried on the silicon rubber molecular chain increases the friction between the molecular chains, and further dissipates energy; the composite material prepared from the high-damping silica gel mud has strong self-healing property, and the tensile strength can be restored to more than 80% of the original tensile strength after 2 hours of breakage;
the introduction of boron atoms in the main chain of the silicon rubber destroys the regularity of the molecular chain of the silicon rubber, changes the glass transition temperature and widens the damping temperature range;
the piezoelectric powder and the conductive powder are added, so that a part of mechanical energy is converted into electric energy and then converted into heat energy through a microcircuit formed by the conductive powder, and the heat energy is dissipated, and an energy conversion mechanism is increased.
Therefore, the maximum value of the loss factor of the high-damping silica gel mud prepared by the invention can reach 2.97, and the temperature range of the loss factor more than 0.3 can reach 117 ℃. The highest loss factor of the high-damping silica gel cement composite material can reach 1.01, and the damping temperature range is more than 200 ℃. Can meet the requirements of vibration reduction and durability in the fields of aerospace, precision instruments and the like, has simple processing mode and is convenient for industrial production.
Drawings
FIG. 1 is a graph of loss factor versus temperature for the high damping cement prepared in example 1,
FIG. 2 is a graph of loss factor versus temperature for the high damping cement prepared in example 5,
FIG. 3 is a graph of loss factor versus temperature for the high damping cement prepared in example 7,
FIG. 4 is a graph of loss factor versus temperature for the high damping cement prepared in example 9,
FIG. 5 is a graph of loss factor versus temperature for the high damping cement prepared in example 14,
FIG. 6 is a graph of loss factor versus temperature for the high damping cement prepared in example 15,
FIG. 7 is a graph of loss factor versus temperature for the high damping cement prepared in example 16,
FIG. 8 is a graph of loss factor versus temperature for the high damping cement prepared in example 17,
fig. 9 is a graph of loss factor versus temperature for the high damping cement prepared in example 21.
Detailed Description
The following examples are further illustrative of the present invention as to the technical content of the present invention, but the essence of the present invention is not limited to the following examples, and one of ordinary skill in the art can and should understand that any simple changes or substitutions based on the essence of the present invention should fall within the protection scope of the present invention.
Example 1
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 15 percent and 15 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of arachidic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 50 parts of lead zirconate titanate powder and 15 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The maximum value of the loss factor of the high-damping silica gel is 1.43, wherein the temperature range with the loss factor more than 0.3 reaches 88 ℃.
Example 2
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 25 percent and 15 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of arachidic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 50 parts of lead zirconate titanate powder and 15 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The maximum value of the loss factor of the high-damping silica gel is 1.56, wherein the temperature range with the loss factor more than 0.3 reaches 92 ℃.
Example 3
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 15 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of arachidic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 50 parts of lead zirconate titanate powder and 15 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The graph of loss factor-temperature curve of the high damping silica gel mud is shown in fig. 1, the maximum value of the loss factor is 1.61, and the temperature range with the loss factor more than 0.3 reaches 98 ℃.
Example 4
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 0.1 part of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silicon cement containing boron hydroxyl and phenyl, and then 3 parts of arachidic acid is added to carry out hybridization to prepare the silicon cement with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 50 parts of lead zirconate titanate powder and 15 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The maximum value of the loss factor of the high-damping silica gel is 1.07, and the temperature range with the loss factor more than 0.3 reaches 101 ℃.
Example 5
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of arachidic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 50 parts of lead zirconate titanate powder and 15 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The graph of loss factor-temperature curve of the high damping silica gel mud is shown in fig. 2, the maximum value of the loss factor is 2.17, and the temperature range with the loss factor more than 0.3 reaches 107 ℃.
Example 6
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of stearic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 50 parts of lead zirconate titanate powder and 15 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The maximum value of the loss factor of the high-damping silica gel is 2.27, and the temperature range with the loss factor more than 0.3 reaches 108 ℃.
Example 7
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 50 parts of lead zirconate titanate powder and 15 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The graph of loss factor-temperature curve of the high damping silica gel mud is shown in fig. 3, the maximum value of the loss factor is 2.52, and the temperature range with the loss factor more than 0.3 reaches 111 ℃.
Example 8
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 30 parts of lead zirconate titanate powder and 15 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The maximum value of the loss factor of the high-damping silica gel is 2.31, and the temperature range with the loss factor more than 0.3 reaches 112 ℃.
Example 9
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 15 parts of acetylene black powder by an open mill to obtain high-damping silica gel mud.
The graph of loss factor-temperature curve of the high damping silica gel mud is shown in fig. 4, the maximum value of the loss factor is 2.89, and the temperature range with the loss factor more than 0.3 reaches 114 ℃.
Example 10
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 0.1 part of carbon nanotube powder by using an open mill to obtain the high-damping silica gel mud.
The maximum value of the loss factor of the high-damping silica gel is 1.35, and the temperature range with the loss factor more than 0.3 reaches 96 ℃.
Example 11
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 0.5 part of carbon nanotube powder by using an open mill to obtain the high-damping silica gel mud.
The maximum value of the loss factor of the high-damping silica gel is 2.05, and the temperature range with the loss factor more than 0.3 reaches 107 ℃.
Example 12
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 1 part of carbon nanotube powder by using an open mill to obtain the high-damping silica gel mud.
The maximum value of the loss factor of the high-damping silica gel is 2.47, and the temperature range with the loss factor more than 0.3 reaches 113 ℃.
Example 13
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 0.1 part of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The maximum value of the loss factor of the high-damping silica gel is 1.22, and the temperature range with the loss factor more than 0.3 reaches 93 ℃.
Example 14
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 25 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
The graph of loss factor-temperature curve of the high damping silica gel mud is shown in fig. 5, the maximum value of the loss factor is 2.97, and the temperature range of the loss factor more than 0.3 reaches 117 ℃.
Example 15
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 25 parts of acetylene black powder by an open mill to obtain high-damping silica gel mud;
3) mixing 100 parts of high-damping silica gel mud and 1.5 parts of dibenzoyl peroxide, uniformly mixing by using an open mill, and pressing a plate by using a flat vulcanizing instrument under the pressure of 15MPa and the temperature of 120 ℃ to obtain the high-damping silica gel mud composite material.
The graph of loss factor-temperature of the composite material is shown in fig. 6, the maximum value of the loss factor is 0.59, the temperature range of the loss factor more than 0.3 reaches 86 ℃, and the tensile strength is 0.97 MPa. And the composite material has self-healing property, and the tensile strength can be recovered to 0.91MPa after 2 hours of fracture.
Example 16
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 25 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
3) Mixing 100 parts of high-damping silica gel mud and 1.5 parts of 2, 4-dichlorobenzoyl peroxide, uniformly mixing by using an open mill, and pressing a plate by using a flat vulcanizing instrument under the pressure of 15MPa and the temperature of 110 ℃ to obtain the high-damping silica gel mud composite material.
The loss factor-temperature curve of the composite material is shown in FIG. 7, the maximum value of the loss factor is 0.67, the temperature range of the loss factor more than 0.3 reaches 118 ℃, and the tensile strength is 0.88 MPa. And the composite material has self-healing property, and the tensile strength can be recovered to 0.85MPa after 2 hours of fracture.
Example 17
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 25 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
3) Mixing 100 parts of high-damping silica gel mud and 1 part of di-tert-butylperoxy diisopropylbenzene, uniformly mixing by an open mill, and pressing a plate by a flat vulcanizing instrument at the pressure of 15MPa and the temperature of 185 ℃ to obtain the high-damping silica gel mud composite material.
The graph of loss factor-temperature curve of the composite material is shown in fig. 8, the maximum value of the loss factor is 0.66, the temperature range with the loss factor more than 0.3 reaches 130 ℃, and the tensile strength is 0.63 MPa. And the composite material has self-healing property, and the tensile strength can be recovered to 0.59MPa after 2 hours of fracture.
Example 18
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 25 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
3) Mixing 100 parts of high-damping silica gel paste, 100 parts of TPEE and 1 part of di-tert-butylperoxy diisopropylbenzene, uniformly mixing by an internal mixer, and pressing a plate by a flat vulcanizing instrument at 15MPa pressure and 185 ℃ to obtain the high-damping silica gel paste composite material.
The maximum value of the loss factor is 0.83, the temperature range with the loss factor more than 0.3 reaches 160 ℃, and the tensile strength is 7.65 MPa. And the composite material has self-healing property, and the tensile strength can be recovered to 6.33MPa after 2 hours of fracture.
Example 19
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 25 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
3) Mixing 100 parts of high-damping silica gel mud, 100 parts of styrene butadiene rubber and 1 part of di-tert-butylperoxy diisopropylbenzene, uniformly mixing by an internal mixer, and pressing a plate by a flat vulcanizing instrument at 15MPa pressure and 185 ℃ to obtain the high-damping silica gel mud composite material.
The maximum value of the loss factor is 0.75, the temperature range with the loss factor more than 0.3 reaches 180 ℃, and the tensile strength is 3.73 MPa. And the composite material has self-healing property, and the tensile strength can be recovered to 3.46MPa after 2 hours of fracture.
Example 20
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 25 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
3) Mixing 100 parts of high-damping silica gel paste, 100 parts of butyl rubber and 1 part of di-tert-butylperoxy diisopropylbenzene, uniformly mixing by an internal mixer, and pressing a plate by a flat vulcanizing instrument at 15MPa pressure and 185 ℃ to obtain the high-damping silica gel paste composite material.
The maximum value of the loss factor is 0.93, the temperature range with the loss factor more than 0.3 reaches 195 ℃, and the tensile strength is 2.81 MPa. And the composite material has self-healing property, and the tensile strength can be recovered to 2.64MPa after 2 hours of fracture.
Example 21
1) Firstly, 100 parts of phenyl hydroxyl silicone oil with the phenyl content of 35 percent and 5 parts of boric acid are put into a kneader to react at the temperature of 180 ℃ to prepare silica gel mud containing boron hydroxyl and phenyl, and then 3 parts of octanoic acid is added to carry out hybridization to prepare silica gel mud with low crosslinking degree;
2) and uniformly mixing 100 parts of low-crosslinking-degree silica gel mud, 80 parts of lead zirconate titanate powder and 25 parts of acetylene black powder by using an open mill to obtain the high-damping silica gel mud.
3) Mixing 100 parts of high-damping silica gel mud, 60 parts of butyl rubber and 1 part of di-tert-butylperoxy diisopropylbenzene uniformly by an internal mixer, and pressing a plate by a flat vulcanizing instrument at the pressure of 15MPa and the temperature of 185 ℃ to obtain the high-damping silica gel mud composite material.
The graph of loss factor-temperature of the composite material is shown in fig. 9, the maximum value of the loss factor is 1.01, the temperature range of the loss factor larger than 0.3 exceeds 200 ℃, and the tensile strength is 2.43 MPa. And the composite material has self-healing property, and the tensile strength can be recovered to 2.25MPa after 2 hours of fracture.
The examples show that the high-damping silica gel cement and the composite material thereof prepared by the invention have excellent damping performance, and have unique self-healing performance compared with the traditional silicon rubber damping composite material, so that the material becomes more intelligent and more practical.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The high-damping silica gel mud is characterized in that: the paint is prepared from the following components in parts by weight:
100 portions of low crosslinking degree silica gel cement
30-80 parts of piezoelectric powder
0.1 to 25 portions of conductive powder,
the low-crosslinking-degree silica gel cement is prepared from phenyl hydroxyl silicone oil, boric acid and organic carboxylic acid in a mass ratio of 100: 0.1-15: 3 through hybridization.
2. The high damping silicon cement according to claim 1, wherein: the phenyl matter of the phenyl hydroxyl silicone oil
The amount percentage is 15-35%.
3. The high damping silicon cement according to claim 1, wherein: the organic carboxylic acid is one or more of caprylic acid, lauric acid, stearic acid and arachidic acid.
4. The high damping silicon cement according to claim 1, wherein: the piezoelectric powder is lead zirconate titanate.
5. The high damping silicon cement according to claim 1, wherein: the conductive powder is one or more of graphene, carbon nano tubes and acetylene black.
6. A composite material comprising the high damping silica gel cement of claim 1, wherein: the paint is prepared from the following components in parts by weight:
100 portions of high damping silica gel cement
0 to 100 portions of elastomer
0.1-5 parts of vulcanizing agent.
7. The composite material of claim 6, wherein: the elastomer is one or more of TPEE, nitrile rubber, styrene butadiene rubber and butyl rubber; the vulcanizing agent is one or more of benzoyl peroxide, di-tert-butylperoxy diisopropylbenzene, di-tert-butylperoxy hexane, 2, 4-dichlorobenzoyl peroxide and dicumyl peroxide.
8. The method of preparing a composite material according to claim 6, wherein: the method comprises the following steps:
1) preparing the low-crosslinking-degree silica gel mud: firstly, 100 parts of phenyl hydroxyl silicone oil and 0.1-15 parts of boric acid are placed in a kneader and react at the temperature of 160-200 ℃ to prepare silica gel containing boron hydroxyl and phenyl, and then 3 parts of organic carboxylic acid is doped for hybridization to prepare the silica gel with low crosslinking degree;
2) preparing high-damping silica gel mud: uniformly mixing 100 parts of low-crosslinking-degree silica gel paste, 30-80 parts of piezoelectric powder and 0.1-25 parts of conductive powder by an open mill to obtain high-damping silica gel paste;
3) preparing a composite material: mixing 100 parts of high-damping silica gel cement, 0-100 parts of elastomer and 0.1-5 parts of vulcanizing agent, uniformly mixing by an open mill, and pressing a plate by a flat vulcanizing instrument at the pressure of 15MPa-30MPa and the temperature of 100-180 ℃ to prepare the self-healing composite material.
9. The use of the high damping silica gel cement of claim 1, wherein: the high damping silica gel cement is used as a filler for a bumper or a damper of a vehicle.
10. Use of a composite material according to claim 6, wherein: the composite material is used for manufacturing vibration reduction devices of aerospace, motor cars or precision instruments.
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| PCT/CN2018/080289 WO2018188471A1 (en) | 2017-04-13 | 2018-03-23 | High-damp silicone rubber cement, a composite material containing the high-damp silicone rubber cement and preparation method and use thereof |
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| WO2019023837A1 (en) * | 2017-07-31 | 2019-02-07 | Dow Silicones Corporation | Handling additive for silicone elastomers |
| CN111363357B (en) * | 2019-12-27 | 2022-05-27 | 长沙新材料产业研究院有限公司 | High-damping silicone rubber composite material and preparation method thereof |
| CN111286199B (en) * | 2020-03-20 | 2022-04-05 | 宁波俊瑆玩具科技有限公司 | High-elasticity high-toughness recovery adhesive |
| CN111285994A (en) * | 2020-03-23 | 2020-06-16 | 深圳倍达飞科技有限公司 | High-damping wide-damping temperature range shock absorption and energy absorption modifier and preparation method thereof |
| CN114426773B (en) * | 2022-02-21 | 2024-01-26 | 西北工业大学 | Preparation method of high-dissipation wide-temperature-range boron-containing thermoplastic silicon elastomer |
| CN114933801B (en) * | 2022-06-21 | 2023-12-22 | 广东电网有限责任公司 | Rubber composition based on modified retired silicon rubber insulator and preparation method thereof |
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