CN114149338A - Preparation method and application of amphiphilic dendritic molecule - Google Patents

Preparation method and application of amphiphilic dendritic molecule Download PDF

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CN114149338A
CN114149338A CN202111070484.3A CN202111070484A CN114149338A CN 114149338 A CN114149338 A CN 114149338A CN 202111070484 A CN202111070484 A CN 202111070484A CN 114149338 A CN114149338 A CN 114149338A
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CN114149338B (en
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王毅琳
张威
杨明
宋卫国
范雅珣
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Institute of Chemistry CAS
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C227/04—Formation of amino groups in compounds containing carboxyl groups
    • C07C227/06—Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid
    • C07C227/08—Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid by reaction of ammonia or amines with acids containing functional groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C231/00—Preparation of carboxylic acid amides
    • C07C231/02—Preparation of carboxylic acid amides from carboxylic acids or from esters, anhydrides, or halides thereof by reaction with ammonia or amines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C231/00—Preparation of carboxylic acid amides
    • C07C231/12—Preparation of carboxylic acid amides by reactions not involving the formation of carboxamide groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch

Abstract

The invention discloses a preparation method and application of an amphiphilic dendritic molecule, wherein the method comprises the following steps: (1) reacting the acrylate compound shown in the formula A with ethylenediamine to prepare 0.5 generation dendritic molecules; (2) adding ethylenediamine into the 0.5 generation dendritic molecules obtained in the step (1) for reaction to prepare 1.0 generation dendritic molecules; (3) and (3) reacting the 1.0 generation dendritic molecule obtained in the step (2) with an acrylate compound shown as a formula B to prepare the amphiphilic dendritic molecule. The invention can obviously reduce the viscosity of the emulsified asphalt and increase the stability of the emulsified asphalt in the field of emulsification of the amphiphilic dendritic molecular asphalt.

Description

Preparation method and application of amphiphilic dendritic molecule
Technical Field
The invention belongs to the field of polymer materials, and particularly relates to a preparation method and application of an amphiphilic dendritic molecule.
Background
In recent years, with the continuous and rapid development of the economy of China, the highway construction of China is developed in a large scale, and occupies a large proportion in the national infrastructure. The continuous development and expansion of road networks in China make the scale of road maintenance increasingly huge. The traditional road maintenance concept of 'heavy maintenance and light prevention' in China causes that the preventive maintenance of the asphalt pavement is not emphasized, and under the action of high-temperature and rainy weather conditions and increasing vehicle loads, the pavement is easy to suffer from early diseases such as ruts, cracks, pits and the like, so that the driving safety and comfort are influenced, and the service life of the pavement is shortened. Therefore, it is important to pay more attention to the problem of asphalt pavement diseases, improve the quality and service life of asphalt pavements, and timely maintain the pavements.
Asphalt is a mixture composed of a plurality of macromolecules with complex chemical components and has unique rheological properties. Because of its good adhesion, aging resistance and water-proofing ability, it has been widely used for a long time for water-proofing and sealing materials, road repairs and the like. Emulsified asphalt exhibits significant advantages over hot asphalt. Emulsified asphalt can increase the uniformity of a road surface, the more compact cohesiveness of a roadbed structure can quickly restore an aged road surface, a large amount of energy can be saved, the energy can be saved by more than 50% by building a road with emulsified asphalt compared with the way with hot asphalt, the construction space is widened, the construction time is saved, and the construction cost is greatly reduced.
However, the emulsified asphalt in the prior art has high viscosity, so that the emulsified asphalt is difficult to be applied in practical process; there is thus a need for improvements in the raw materials for emulsified asphalt and the process for preparing the same.
Disclosure of Invention
In order to improve the above technical problems, the present invention provides a method for preparing an amphiphilic dendrimer, the method comprising the steps of:
(1) reacting the acrylate compound shown in the formula A with ethylenediamine to prepare 0.5 generation dendritic molecules;
(2) adding ethylenediamine into the 0.5 generation dendritic molecules obtained in the step (1) for reaction to prepare 1.0 generation dendritic molecules;
(3) reacting the 1.0 generation of dendritic molecules obtained in the step (2) with an acrylate compound shown as a formula B to prepare amphiphilic dendritic molecules;
Figure BDA0003260248150000021
in the formula A, R1、R2、R3Same or different, independently selected from H, C1-20Alkyl radical, C6-20An aryl group;
R4selected from unsubstituted or optionally substituted by one or more RbSubstituted C1-20Alkyl radical, C6-20Aryl, -O-C1-20Alkyl, -C1-20An alkyl sulfonate;
Rbis selected from-O-C1-20An alkyl group;
Figure BDA0003260248150000022
in the formula B, R5、R6、R7Same or different, independently selected from H, C1-20Alkyl radical, C6-20An aryl group;
R8selected from unsubstituted or optionally substituted by one or more RaSubstituted C1-20Alkyl radical, C6-20Aryl, -O-C1-20Alkyl, -C1-20Alkylsulfonic acid salts, -C1-20alkyl-C6-20An aryl group;
Rais selected from-O-C1-20Alkyl or-O-C1-20Alkylene-O-C1-20An alkyl group.
According to the invention, in formula A, R1、R2、R3Same or different, independently selected from H, C1-6Alkyl radical, C6-14Aryl radical, R4Selected from H, C1-6Alkyl radical, C6-14Aryl radical, -C1-6Alkylsulfonates or substituted by one or more RbSubstituted C1-6An alkyl group. More preferably, R1、R2、R3Are all H, R4Is methyl.
According to the invention, the acrylate compound shown in the formula A is preferably methyl acrylate.
According to the invention, in the formula B, R5、R6、R7Same or different, independently selected from H, C1-6Alkyl radical, C6-14An aryl group;
R8selected from H, C1-6Alkyl radical, C6-14Aryl radical, -C1-6Alkylsulfonic acid salts, -C1-6alkyl-C6-14Aryl radicals or by one or more RaSubstituted C1-6Alkyl radical, wherein RaIs selected from-O-C1-6Alkyl or-O-C1-6alkylene-O-C1-6An alkyl group.
According to the invention, in the step (3), the acrylate compound represented by the formula B is at least one selected from benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate, 2-phenylacrylic acid, 9-anthracenemethyl methacrylate and 3-sulfopropyl methacrylate potassium salt.
According to the invention, in the step (1), the solvent is one or more of methanol, ethanol, propanol and acetone, and accounts for 30-70% of the total reaction raw materials by mass.
In the invention, the amphiphilic dendritic molecules contain a dendritic structure, a hydrophilic structure and a hydrophobic structure.
According to the invention, in the step (1), the mass ratio of the acrylate compound shown in the formula A to the ethylenediamine is 4-8: 1.
According to the present invention, the step (1) further comprises a post-treatment step, for example, distillation of the product under reduced pressure to remove the solvent and unreacted acrylate compound represented by formula A.
According to the invention, in the step (2), the molar ratio of the 0.5 generation dendritic molecules to the ethylenediamine is 1: 4.2-4.8.
According to the present invention, the step (2) may further comprise a post-treatment step, for example, distillation of the product under reduced pressure to remove the solvent and unreacted ethylenediamine.
According to the invention, in the step (3), the molar ratio of the 1.0 generation dendritic molecules to the acrylate compound shown in the formula B is 1: 4.2-4.8.
According to the invention, in step (3), the 1.0 generation dendrimer is dissolved in the solvent and then added dropwise to the acrylate compound represented by formula B.
According to the present invention, the step (3) further comprises a post-treatment step, for example, distillation of the product under reduced pressure to remove the solvent and unreacted acrylate compound represented by the formula B.
According to the invention, the preparation method belongs to a divergent synthesis reaction, the reaction is carried out under the protection of inert gas, the reaction temperature is 15-60 ℃, and the preferable temperature is 30 ℃.
As a preferred embodiment of the present invention, the preparation method specifically comprises the steps of:
(S1) Synthesis of 0.5 Generation dendrimer: under the protection of nitrogen, Ethylenediamine (EDA) dissolved in methanol was dropwise added to an excess amount of purified Methyl Acrylate (MA), reacted at 30 ℃ for 24 hours under magnetic stirring, and then distilled under reduced pressure to remove methanol and unreacted MA, thereby obtaining 0.5-generation dendrimer.
(S2) Synthesis of dendrimer of generation 1.0: dissolving the 0.5 generation dendrimer in the step (S1) in methanol, dropwise adding the solution into excessive EDA under the protection of nitrogen, reacting for 96 hours under magnetic stirring at 30 ℃, and then carrying out reduced pressure distillation to remove the methanol and the unreacted EDA, thus obtaining the 1.0 generation dendrimer;
wherein, the reaction process of the step (S1) and the step (S2) is as follows:
Figure BDA0003260248150000041
(S3) synthesis of amphiphilic dendrimer: dropwise adding the dendrimer of 1.0 generation dissolved in the methanol in the step (2) into the excessive purified acrylate compound shown in the formula B under the protection of nitrogen, reacting for 24 hours under magnetic stirring at 30 ℃, and then carrying out reduced pressure distillation to remove the methanol and the unreacted acrylate compound to obtain the amphiphilic dendrimer.
The invention also provides an amphiphilic dendritic molecule, which is prepared by the method.
The invention also provides application of the amphiphilic dendritic molecule, which is applied to the field of asphalt emulsification and can obviously reduce the viscosity of emulsified asphalt and increase the stability of the emulsified asphalt.
Advantageous effects
The invention successfully prepares the amphiphilic dendritic molecule, and can obviously reduce the viscosity of the emulsified asphalt and increase the stability of the emulsified asphalt in the field of asphalt emulsification of the amphiphilic dendritic molecule.
Definition and description of terms
“C1-20Alkyl is understood to mean a straight-chain or branched saturated monovalent hydrocarbon radical having from 1 to 20 carbon atoms. For example, "C1-10Alkyl "denotes straight-chain and branched alkyl groups having 1,2, 3, 4, 5, 6, 7, 8, 9 or 10 carbon atoms," C1-6Alkyl "denotes straight-chain and branched alkyl groups having 1,2, 3, 4, 5 or 6 carbon atoms. The alkyl group is, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an isopropyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an isopentyl group, a 2-methylbutyl group, a 1-ethylpropyl group, a 1, 2-dimethylpropyl group, a neopentyl group, a 1, 1-dimethylpropyl group, a 4-methylpentyl group, a 3-methylpentyl group, a 2-ethylbutyl group, a 1-ethylbutyl group, a 3, 3-dimethylbutyl group, a 2, 2-dimethylbutyl group, a 1, 1-dimethylbutyl group, a 2, 3-dimethylbutyl group, a 1, 3-dimethylbutyl group or a 1, 2-dimethylbutyl group, or the like, or isomers thereof.
The term "C6-20Aryl "is understood to preferably mean a mono-, bi-or tricyclic hydrocarbon ring having a monovalent or partially aromatic character with 6 to 20 carbon atoms, preferably" C6-14Aryl ". The term "C6-14Aryl "is to be understood as preferably meaning a mono-, bi-or tricyclic hydrocarbon ring having a monovalent or partially aromatic character with 6, 7, 8, 9, 10, 11, 12, 13 or 14 carbon atoms (" C6-14Aryl group "), in particular a ring having 6 carbon atoms (" C6Aryl "), such as phenyl; or biphenyl, or is a ring having 9 carbon atoms ("C9Aryl), such as indanyl or indenyl, or a ring having 10 carbon atoms ("C10Aryl radicals), such as tetralinyl, dihydronaphthyl or naphthyl, or rings having 13 carbon atoms ("C13Aryl radicals), such as the fluorenyl radical, or a ring having 14 carbon atoms ("C)14Aryl), such as anthracenyl. When said C is6-20When the aryl group is substituted, it may be mono-or polysubstituted. And, the substitution site thereof is not limited, and may be, for example, ortho-, para-or meta-substitution.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to specific embodiments. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
Unless otherwise indicated, the raw materials and reagents used in the following examples are all commercially available products or can be prepared by known methods.
In examples 1-8, both the 0.5 generation dendrimer and the 1.0 generation dendrimer were prepared as follows:
(S1) Synthesis of 0.5 Generation dendrimer: under nitrogen protection, 30g of Ethylenediamine (EDA) dissolved in methanol was added dropwise to 180.79g of purified Methyl Acrylate (MA) in excess, reacted at 30 ℃ for 24 hours under magnetic stirring, and then distilled under reduced pressure to remove methanol and unreacted MA, thereby obtaining 0.5-generation dendrimer.
(S2) Synthesis of dendrimer of generation 1.0: dissolving 202.23g of 0.5 generation dendrimer in the step (S1) in methanol, dropwise adding into 144.24g of excessive EDA under the protection of nitrogen, reacting for 96 hours at 30 ℃ under magnetic stirring, and distilling under reduced pressure to remove the methanol and the unreacted EDA to obtain the 1.0 generation dendrimer;
wherein, the reaction process of the step (S1) and the step (S2) is as follows:
Figure BDA0003260248150000061
example 1
The preparation method of the amphiphilic dendrimer of this example:
synthesis of amphiphilic dendrimers: under the protection of nitrogen, 258.35g of 1.0 generation dendritic molecules dissolved in methanol are dropwise added into excessive purified benzyl methacrylate, wherein the molar ratio of the 1.0 generation dendritic molecules to the benzyl methacrylate is 1:4.4, the mixture reacts for 24 hours under magnetic stirring at the temperature of 30 ℃, and then the mixture is subjected to reduced pressure distillation to remove the methanol and unreacted acrylic compounds, so that the amphiphilic dendritic molecules are obtained.
Example 2
The preparation method of the amphiphilic dendrimer of this example:
synthesis of amphiphilic dendrimers: under the protection of nitrogen, 258.35g of generation 1.0 dendritic molecules dissolved in methanol are dropwise added into excessive purified 2- (2-ethoxyethoxy) ethyl acrylate, wherein the molar ratio of the generation 1.0 dendritic molecules to the 2- (2-ethoxyethoxy) ethyl acrylate is 1:4.4, the mixture is reacted for 24 hours under magnetic stirring at 30 ℃, and then the mixture is subjected to reduced pressure distillation to remove the methanol and unreacted acrylic compounds, so that the amphiphilic dendritic molecules are obtained.
Example 3
The preparation method of the amphiphilic dendrimer of this example:
synthesis of amphiphilic dendrimers: under the protection of nitrogen, 258.35g of generation 1.0 dendrimer dissolved in methanol is dropwise added into excessive purified methacrylic acid-9-anthracene methyl ester, wherein the molar ratio of the generation 1.0 dendrimer to the methacrylic acid-9-anthracene methyl ester is 1:4.4, the reaction is carried out for 24 hours under magnetic stirring at 30 ℃, and then the pressure reduction distillation is carried out to remove the methanol and unreacted acrylic compounds, thus obtaining the amphiphilic dendrimer.
Example 4
The preparation method of the amphiphilic dendrimer of this example:
synthesis of amphiphilic dendrimers: under the protection of nitrogen, 258.35g of generation 1.0 dendrimer dissolved in methanol was dropwise added to an excess of the mixture of purified 2- (2-ethoxyethoxy) ethyl acrylate and 9-anthracenemethyl methacrylate (wherein the molar ratio of 2- (2-ethoxyethoxy) ethyl acrylate to 9-anthracenemethyl methacrylate was 7:3), wherein the molar ratio of generation 1.0 dendrimer to the sum of the moles of 2- (2-ethoxyethoxy) ethyl acrylate and 9-anthracenemethyl methacrylate was 1:4.4, and after 24 hours of reaction under magnetic stirring, the mixture was distilled under reduced pressure to remove methanol and unreacted acrylic compound, thus obtaining an amphiphilic dendrimer.
Example 5
The preparation method of the amphiphilic dendrimer of this example: synthesis of amphiphilic dendrimers: 258.35g of a 1.0 generation dendrimer dissolved in methanol were added dropwise to an excess of a mixture of purified benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate, and 3-sulfopropyl methacrylate potassium salt under nitrogen protection (wherein the molar ratio of benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate, and 3-sulfopropyl methacrylate potassium salt was 2:4:4), wherein the molar ratio of the 1.0 generation dendritic molecule to the sum of the moles of benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate and 3-sulfopropyl methacrylate potassium salt is 1:4.4, the reaction is carried out for 24 hours at 30 ℃ under magnetic stirring, and (4) carrying out reduced pressure distillation to remove methanol and unreacted acrylic compounds to obtain the amphiphilic dendritic molecules.
Example 6
The preparation method of the amphiphilic dendrimer of this example: synthesis of amphiphilic dendrimers: 258.35g of a generation 1.0 dendrimer dissolved in methanol were added dropwise under nitrogen protection to an excess of a mixture of purified benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate, 9-anthracenemethylmethacrylate, 3-sulfopropyl methacrylate potassium salt (the molar ratio of benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate, 9-anthracenemethylmethacrylate, 3-sulfopropyl methacrylate potassium salt was 1.5:4:0.5:4), wherein the molar ratio of the generation 1.0 dendrimer to the sum of the moles of benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate, 9-anthracenemethylmethacrylate, 3-sulfopropyl methacrylate potassium salt was 1:4.4, and (3) reacting for 24 hours at 30 ℃ under magnetic stirring, and then carrying out reduced pressure distillation to remove methanol and unreacted acrylic compounds to obtain the amphiphilic dendritic molecules.
Example 7
The preparation method of the amphiphilic dendrimer of this example: synthesis of amphiphilic dendrimers: 258.35g of a generation 1.0 dendrimer dissolved in methanol were added dropwise to an excess of a mixture of purified benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate, 2-phenylacrylic acid, 9-anthracenemethylmethacrylate and 3-sulfopropylmethacrylate potassium salt (the molar ratio of benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate, 2-phenylacrylic acid, 9-anthracenemethylmethacrylate and 3-sulfopropylmethacrylate potassium salt being 1.5:3:1:0.5:4) under nitrogen, wherein the generation 1.0 dendrimer was reacted with benzyl methacrylate, 2- (2-ethoxyethoxy) ethyl acrylate, 2-phenylacrylic acid, 2-phenylpropyl acrylate, and, The mol ratio of the sum of the mol of the 9-anthracene methyl methacrylate and the mol of the 3-sulfopropyl methacrylate potassium salt is 1:4.4, the mixture reacts for 24 hours under magnetic stirring at the temperature of 30 ℃, and then the mixture is decompressed and distilled to remove methanol and unreacted acrylic compounds, thus obtaining the amphiphilic dendritic molecules.
Example 8
For the amphiphilic dendrimers prepared in examples 1 to 7, asphalt was emulsified using a solution of a certain concentration thereof under certain conditions, and the viscosity and the stabilization time of the asphalt emulsion were measured. The specific test process is as follows:
an amphiphilic dendrimer solution was prepared at a mass concentration of 2% using a sodium hydroxide solution at pH 13. Adding 180g of amphiphilic dendritic molecular solution with the mass concentration of 2% at 75 ℃ into a colloid mill, adding 220g of flowable asphalt (such as coal tar pitch or petroleum asphalt) which is fully heated at 130 ℃ into the colloid mill under the condition of running of the colloid mill, emulsifying for 40 seconds, pouring the emulsified asphalt into a 500mL beaker, measuring the viscosity of the emulsified asphalt at normal temperature by using a Brookfield viscometer after fully cooling, sealing the opening of the beaker, standing and observing the stabilization time of the emulsified asphalt, wherein the stabilization time takes the precipitation or the generation of precipitates of the emulsified asphalt as the deadline.
The results are shown in Table 1.
TABLE 1 viscosity and stabilization time of emulsified asphalt prepared from amphiphilic dendrimers prepared in examples 1-7
Figure BDA0003260248150000091
Figure BDA0003260248150000101
The embodiments of the present invention have been described above by way of example. However, the scope of the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement and the like made by those skilled in the art within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A method of making an amphiphilic dendrimer, the method comprising the steps of:
(1) reacting the acrylate compound shown in the formula A with ethylenediamine to prepare 0.5 generation dendritic molecules;
(2) adding ethylenediamine into the 0.5 generation dendritic molecules obtained in the step (1) for reaction to prepare 1.0 generation dendritic molecules;
(3) reacting the 1.0 generation of dendritic molecules obtained in the step (2) with an acrylate compound shown as a formula B to prepare amphiphilic dendritic molecules;
Figure FDA0003260248140000011
in the formula A, R1、R2、R3Same or different, independently selected from H, C1-20Alkyl radical, C6-20An aryl group;
R4selected from unsubstituted or optionally substituted by one or more RbSubstituted C1-20Alkyl radical, C6-20Aryl, -O-C1-20Alkyl, -C1-20An alkyl sulfonate;
Rbis selected from-O-C1-20An alkyl group;
Figure FDA0003260248140000012
in the formula B, R5、R6、R7Same or different, independently selected from H, C1-20Alkyl radical, C6-20An aryl group;
R8selected from unsubstituted or optionally substituted by one or more RaSubstituted C1-20Alkyl radical, C6-20Aryl, -O-C1-20Alkyl, -C1-20Alkylsulfonic acid salts, -C1-20alkyl-C6-20An aryl group;
Rais selected from-O-C1-20Alkyl or-O-C1-20alkylene-O-C1-20An alkyl group.
2. The process according to claim 1, wherein R in the formula A is1、R2、R3Same or different, independently selected from H, C1-6Alkyl radical, C6-14Aryl radical, R4Selected from H, C1-6Alkyl radical, C6-14Aryl radical, -C1-6Alkylsulfonates or substituted by one or more RbSubstituted C1-6An alkyl group.
3. The method according to claim 1, wherein the acrylate compound represented by formula a is methyl acrylate.
4. The process according to claim 1, wherein R in the formula B5、R6、R7Same or different, independently selected from H, C1-6Alkyl radical, C6-14An aryl group;
R8selected from H, C1-6Alkyl radical, C6-14Aryl radical, -C1-6Alkylsulfonic acid salts, -C1-6alkyl-C6-14Aryl radicals or by one or more RaSubstituted C1-6Alkyl radical, wherein RaIs selected from-O-C1-6Alkyl or-O-C1-6alkylene-O-C1-6An alkyl group.
5. The preparation method according to claim 1, wherein the solvent is one or more of methanol, ethanol, propanol and acetone, and the mass ratio of the solvent to the total reaction raw materials is 30-70%.
6. The preparation method according to claim 1, wherein in the step (1), the mass ratio of the acrylate compound represented by the formula A to the ethylenediamine is 4-8: 1.
7. The method according to claim 1, wherein in the step (2), the molar ratio of 0.5 generation dendrimer to ethylenediamine is 1:4.2 to 4.8.
8. The preparation method according to claim 1, wherein in the step (3), the molar ratio of the 1.0 generation dendrimer to the acrylate compound represented by the formula B is 1: 4.2-4.8.
9. An amphiphilic dendrimer prepared according to any one of claims 1 to 8.
10. Use of an amphiphilic dendrimer according to claim 9, wherein the use is in the field of asphalt emulsification.
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