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Branch-shaped damping agent and preparation method and use thereof

A dendritic and damping agent technology, applied in the field of damping materials, can solve the problems of high cost, low energy conversion efficiency, difficult to use in a large area, etc., and achieves excellent mechanical properties and wear resistance, low preparation cost, and good damping effect. Effect

Active Publication Date: 2012-06-20
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, copolymerization and blending modification only have better damping effects on materials used in low-temperature environments, and are not conducive to high-temperature damping; interpenetrating polymer networks are mainly used in coatings, and structural damping materials are difficult to remove due to solvent removal and high cost. Area use; for conductive piezoelectric damping materials, although the damping mechanism does not depend on the glass transition of the polymer, due to the mismatch between the inorganic filler particles and the polymer matrix, the energy conversion efficiency is low and the vibration absorption effect is not good , cannot meet the actual needs

Method used

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  • Branch-shaped damping agent and preparation method and use thereof
  • Branch-shaped damping agent and preparation method and use thereof
  • Branch-shaped damping agent and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] a) 25g of inorganic montmorillonite and 25mL of methyltrichlorosilane were added to a three-necked flask, and 50mL of 40% ethanol aqueous solution was added, heated to 70°C, stirred and reacted for 3 hours, and then solid-liquid separation was carried out. The separated solid was washed, and then vacuum-dried at 70°C to obtain organic montmorillonite;

[0042] b) Add 0.10mol octamethylcyclotetrasiloxane, 0.20mol methylhydrogendichlorosilane and 10mL acetic acid into a four-necked flask, 2 In some cases, after stirring for 20 minutes, the temperature was raised to 40°C for 5 hours, and then dehydrated for 10 minutes to obtain a colorless and transparent liquid, that is, 11-hydropermethyl-1-hexasiloxanol;

[0043] c) Add 0.20mol 11-hydropermethyl-1-hexasiloxanol, 0.10mol trimethylchlorosilane and 10mL pyridine into a four-necked flask, 2 In some cases, after stirring for 40 minutes, the temperature was raised to 60°C for 4 hours to obtain a colorless transparent liquid, ...

Embodiment 2

[0050] a) 60g of inorganic montmorillonite and 33mL of methyltrichlorosilane were added to a three-necked flask, and 60mL of ethanol aqueous solution with a volume concentration of 50% was added, heated to 80°C, stirred for 2.5 hours, and then solid-liquid separation was carried out. The separated solid was washed, and then vacuum-dried at 80°C to obtain organic montmorillonite;

[0051] b) Add 0.20mol octamethylcyclotetrasiloxane, 0.30mol methylhydrogendichlorosilane and 15mL acetic acid into a four-necked flask, 2 In some cases, after stirring for 30 minutes, the temperature was raised to 50°C for 4 hours, and then dehydrated for 15 minutes to obtain a colorless transparent liquid, that is, 11-hydropermethyl-1-hexasiloxanol;

[0052] c) Add 0.30mol 11-hydropermethyl-1-hexasiloxanol, 0.15mol trimethylchlorosilane and 15mL pyridine into a four-necked flask, 2 In some cases, after stirring for 50 minutes, the temperature was raised to 70°C for 3 hours to obtain a colorless tra...

Embodiment 3

[0059] a) 105g of inorganic montmorillonite and 42mL of dimethyldichlorosilane were added to a three-necked flask, and 70mL of an aqueous ethanol solution with a volume concentration of 60% was added, heated to 90°C, stirred and reacted for 2 hours, and then solid-liquid separation was performed, Wash the separated solid, and then dry it in vacuum at 90°C to obtain organic montmorillonite;

[0060] b) Add 0.30mol octamethylcyclotetrasiloxane, 0.40mol methylhydrogendichlorosilane and 20mL acetic acid into a four-necked flask, 2 In some cases, after stirring for 40 minutes, the temperature was raised to 60°C for 3 hours, and then dehydrated for 20 minutes to obtain a colorless and transparent liquid, that is, 11-hydropermethyl-1-hexasiloxanol;

[0061] c) Add 0.40mol 11-hydropermethyl-1-hexasiloxanol, 0.20mol trimethylchlorosilane and 20mL pyridine into a four-necked flask, 2 In some cases, after stirring for 60 minutes, the temperature was raised to 60°C for 2 hours to obtain ...

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Abstract

The invention discloses a branch-shaped damping agent and a preparation method and use thereof. The damping agent is formed by condensing branch-shaped organic montmorillonoid and hindered phenol. The preparation method of the damping agent comprises the following steps: reacting the branch-shaped organic montmorillonoid and the hindered phenol for 2 to 3 hours at 100 to 120 DEG C in a protectiveatmosphere of N2; vacuumizing till the vacuum degree reaches 120 to130pa, and continuing to react for 2 to 4 hours; ending the reaction, adding acetone to dissolve the product of the reaction completely, dripping the solution into ether, and settling; and filtering and drying. The branch-shaped damping agent disclosed by the invention can be used to prepare a damping rubber material. Compared with the prior art, the branch-shaped damping agent solves the migration problem of small molecular damping agents in a rubber substrate; a damping material prepared by the branch-shaped damping agent disclosed by the invention has the advantages of good damping effect, excellent mechanical and wear-resistance properties, low preparation cost, easy implementation and the like.

Description

technical field [0001] The invention relates to a damping agent and its preparation method and application, in particular to a dendritic damping agent and its preparation method and application, belonging to the technical field of damping materials. Background technique [0002] With the rapid development of modern technology and modern industry, mechanical equipment tends to be high-speed and automatic, so a series of problems such as vibration, noise, fatigue and fracture will inevitably occur, which will affect the machining accuracy and product quality of the machine, and accelerate the mechanical structure. fatigue damage, shorten the service life of machinery, pollute the environment, and endanger people's health. Therefore, it is an urgent problem to research and develop new and high-efficiency damping materials with excellent comprehensive performance. [0003] Damping material is a functional material that can absorb vibrational mechanical energy and convert it int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K9/04C08K3/34C09C1/42C09C3/12C08L23/22C08L23/28C08L9/02C08L23/16C08L9/06C08L7/00C08K13/06
Inventor 王锦成郝文莉赵艺潘鑫辰郭曦董星宇
Owner SHANGHAI UNIV OF ENG SCI
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