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Novel magnetorheological elastomer based on dynamic polymer matrix and preparation method

A magnetorheological elastomer and polymer technology, applied in the field of magnetorheological smart materials and dynamic polymers, can solve problems such as difficulty in controlling the degree of polymerization reaction and difficulty in controlling the composite structure of composite materials.

Pending Publication Date: 2020-10-27
YUNNAN UNIV
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Problems solved by technology

In previous research reports, polyimine and its composite materials are all non-elastomers. The preparation method is to form oligomers in a solvent, then evaporate the solvent, and hot press the obtained oligomer powder. The compression method is difficult to control the degree of polymerization reaction, and the composite structure of the prepared composite material is even more difficult to control

Method used

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  • Novel magnetorheological elastomer based on dynamic polymer matrix and preparation method
  • Novel magnetorheological elastomer based on dynamic polymer matrix and preparation method
  • Novel magnetorheological elastomer based on dynamic polymer matrix and preparation method

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preparation example Construction

[0027] A novel magnetorheological elastomer based on dynamic polymer matrix polyimine and a preparation method thereof include the following steps:

[0028] Using 3,3-diamino-N-methyldipropylamine, and poly(propylene glycol) bis(2-aminopropyl ether) as the diamine monomer, terephthalaldehyde as the dialdehyde monomer, three (2- Aminoethyl) amine is used as a crosslinking agent. According to the molar ratio of terephthalaldehyde: diamine: crosslinking agent between 1.0: 1.0: 0.2 ~ 1.0: 0.8: 0.13, crosslink the selected diamine monomer and tris(2-aminoethyl)amine The agents are jointly dissolved in an appropriate amount of a suitable solvent, and the terephthalaldehyde is additionally dissolved in an appropriate amount of the same solvent. Then mix the two solutions, and when the reaction reaches the corresponding gel point at room temperature, add carbonyl iron powder with an average particle size of 4-8 microns. The volume fraction of the carbonyl iron powder is 10%-40%. Stir wh...

example 1

[0030] Example 1. Preparation of magnetorheological elastomer compounded with carbonyl iron powder and poly(propylene glycol) bis(2-p-anilinopropyl ether) with a degree of cross-linking of 4.3%.

[0031] 1.51 g of poly(propylene glycol) bis(2-aminopropyl ether) and 0.09 g of tris(2-aminoethyl)amine were dissolved in 20 ml of methanol to form solution A. Then 1.0 g of terephthalaldehyde was dissolved in 30 ml of methanol to form solution B. After adding solution A to B and mixing, place it at room temperature for 2 hours to seal the reaction, and add 30% volume fraction of carbonyl iron powder under stirring conditions to make it uniformly dispersed in the polymerization reaction system. The temperature was raised to 40°C, the system was opened and reacted for 6 hours, and then the temperature was raised to 85°C for reaction, and the solvent was completely dried and reacted for 12 hours. Finally, it was moved to a vacuum drying oven and reacted at 50°C and 85°C for 12 hours each....

example 2

[0032] Example 2. Preparation of magnetorheological elastomer composited with carbonyl iron powder and 1.1% cross-linking poly(propylene glycol) bis(2-p-anilinopropyl ether).

[0033] Dissolve 1.67 g of poly(propylene glycol) bis(2-aminopropyl ether) and 0.02 g of tris(2-aminoethyl)amine in 20 ml of N,N-dimethylformamide to form solution C. Then 1.0 g of terephthalaldehyde was dissolved in 30 ml of N,N-dimethylformamide to form solution D. After adding solution C to D and mixing, place it at room temperature for sealing reaction for 4 hours, add 40% volume fraction of carbonyl iron powder under stirring conditions to make it uniformly dispersed in the polymerization reaction system. The temperature was raised to 60°C and the system was left open for reaction for 8 hours, and then the temperature was raised to 85°C for reaction, and the solvent was completely dried and reacted for 12 hours. Finally, it was moved to a vacuum drying oven and reacted at 50°C and 85°C for 12 hours ea...

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Abstract

The invention discloses a novel magnetorheological elastomer based on a dynamic polymer matrix and a preparation method. The invention relates to the technical field of dynamic polymers and magnetorheological materials at the same time, and the novel magnetorheological elastomer with dynamic polymer polyimine as the matrix is prepared. According to the preparation method, an easily available and cheap terephthalaldehyde monomer, a diamine monomer capable of forming an elastomer in a chemical structure and a triamine cross-linking agent with equivalent activity are adopted, and a temperature-segmented continuous solution polymerization reaction mode is adopted, so that when the polymerization degree reaches a gel point, uniform compounding of a polyimine elastic matrix and carbonyl iron powder is realized. The novel magnetorheological material has remarkable magnetic response performance, also has the dynamic response characteristic of a dynamic polymer, and is a multi-responsiveness intelligent material. The dynamic polymer is applied to the field of magnetorheological materials, a novel polymer matrix is provided for the magnetorheological materials, a multi-response function is developed, and new application is developed for the dynamic polymer and the magnetorheological material at the same time.

Description

Technical field [0001] The invention belongs to the field of magnetorheological intelligent materials, and at the same time belongs to the field of dynamic polymers, and specifically relates to the preparation technology of dynamic polymer polyimide elastomer, and the composite of magnetorheological material prepared based on carbonyl iron powder and dynamic polymer elastomer matrix technology. Background technique [0002] Magnetorheological elastomers are materials whose rheological properties can respond quickly and reversibly in an external magnetic field. They are an important class of intelligent materials and are widely used in vibration and noise reduction control, mechanical transmission, intelligent control and other fields in buildings and automobiles. . Usually it is mainly composed of micron-sized magnetic particles and a non-magnetic highly elastic polymer matrix. Its performance is mainly determined by factors such as the type of polymer, the type of magnetic par...

Claims

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Application Information

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IPC IPC(8): C08G12/06C08K3/18
CPCC08G12/06C08K3/18C08K2201/01
Inventor 李宝光李海滨吴笑婕
Owner YUNNAN UNIV
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