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Wide temperature range acrylate rubber-based nano-silica damping material and preparation method thereof

A technology of nano-silica and acrylate, which is applied in the field of damping material preparation, can solve the problems of low application value, failure to take into account high damping performance, and deterioration of material mechanical properties, so as to improve mechanical properties, improve damping performance, and expand The effect of effectively damping the temperature domain

Active Publication Date: 2020-06-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the research field of viscoelastic damping materials, there are mainly the following problems: (1) The good damping performance of viscoelastic damping materials is mainly around the glass transition temperature, but the lower glass transition temperature (mostly at minus degrees Celsius ) For actual working conditions, the application value is not high; (2) Viscoelastic damping materials often cannot take into account high damping performance (loss factor tan δ ≥0.3) and a wide effective damping temperature range (tan δ ≥0.3 temperature range) two conditions; (3) The viscoelastic damping material cannot take into account high damping performance and high mechanical properties. In the process of preparing damping materials, a large amount of small molecule damping agents are often added, which inevitably deteriorates the material The mechanical properties cannot meet the actual application requirements

Method used

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  • Wide temperature range acrylate rubber-based nano-silica damping material and preparation method thereof
  • Wide temperature range acrylate rubber-based nano-silica damping material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Put 60g of nano-silica in a beaker, add ethanol, ultrasonically disperse at 40°C for 1 hour, then transfer to a three-necked flask, mechanically stir at 55°C and slowly add 10g of dodecyltrimethoxysilane, in the reflux state After stirring for 6 hours, the mixture was cooled and filtered, and the filter cake was rinsed with ethanol, and vacuum-dried at 60° C. to obtain modified nano-silica;

[0027] Step 2: Mix 100 parts of ACM rubber, 60 parts of hindered phenol small molecule AO-80, 60 parts of modified nano silicon dioxide, 1 part of stearic acid, 1 part of vulcanization accelerator D, 2 parts of antioxidant 4010NA, 2 parts The processing aid RL210 and 1 part of sulfur were mixed, and then thinned out, and the positive vulcanization time was measured with a vulcanization meter, and the wide temperature range ACM-based nano-silica damping material was obtained by vulcanization according to the positive vulcanization time.

[0028] The DMA diagram of the wide t...

Embodiment 2

[0030] Repeat embodiment 1 method, in step one, 40g nano silicon dioxide, modifier is 5g dodecyltrimethoxysilane and 5g gamma-aminopropyl triethoxysilane; In step two, mixing formula is 100 parts of ACM rubber, 50 parts of hindered phenol small molecule AO-80, 40 parts of modified nano silica, 3 parts of stearic acid, 2 parts of vulcanization accelerator D, 4 parts of vulcanization accelerator DOTG, 2 parts of antioxidant 4010NA , 3 parts of anti-aging agent RD, 1 part of processing aid RL210, 3 parts of processing aid WS280, 4 parts of sulfur. The effective damping temperature range of the obtained damping material is -11.2°C to 32.3°C, and the width of the temperature range reaches 43.5°C. The tensile strength is 8.87MPa, and the tear strength is 24.52kN / m.

Embodiment 3

[0032] Repeat Example 1 method, in step one, 40g nano silicon dioxide, modifying agent is 7g octadecyltrimethoxysilane and 5g gamma-methacryloxypropyl trimethoxysilane; In step two, The mixing formula is 100 parts of ACM rubber, 30 parts of hindered phenol small molecule AO-60, 40 parts of modified nano silicon dioxide, 2 parts of stearic acid, 2 parts of vulcanization accelerator DOTG, 3 parts of antioxidant RD, 2 parts of processing Auxiliary WB222, 1 part of processing aid WS280, 3 parts of sulfur. The effective damping temperature range of the obtained damping material is -10.6°C to 31.8°C, and the width of the temperature range reaches 42.4°C. The tensile strength is 8.54MPa, and the tear strength is 24.09kN / m.

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Abstract

An acrylate-rubber-based nanometer silica damping material having a wide temperature range and a preparing method thereof are disclosed. ACM, modified nanometer silica, hindered phenol micromolecules,a vulcanizing agent, and other ingredients are mixed and vulcanized by utilizing a mechanical blending method to obtain the ACM damping rubber containing the nanometer silica and having a wide temperature range. Through addition of the nanometer silica the surface of which is provided with controllable polar groups into the ACM, strong hydrogen bonds among the nanometer silica, the hindered phenol micromolecules and the ACM are formed, the effective damping temperature range (with tan[delta] being not less than 0.3) of the ACM-based nanometer silica damping material is greatly increased, andmechanical performance of the material is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of damping material preparation, and in particular relates to a wide temperature range acrylate rubber (ACM)-based nanometer silicon dioxide damping material and a preparation method thereof. Background technique [0002] With the development of contemporary industrial technology, various fields have gradually realized the mechanization and automation of production. Although this has brought great convenience to our production and life, the accompanying vibration and noise have also brought great hidden dangers to our physical and mental health. At the same time, vibration will also seriously affect the mechanical equipment. service life and increase equipment maintenance costs. Therefore, shock and noise reduction has become an urgent problem to be solved. Using damping material is one of the main means to solve this problem. Viscoelastic damping material is a material that can convert a large amount of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/08C08K13/06C08K9/06C08K3/36C08K5/18C08K5/31
CPCC08K3/36C08K5/18C08K5/31C08K9/06C08K13/06C08K2201/011C08K2201/014C08L33/08
Inventor 贾红兵张旭敏温彦威王经逸尹清薛晓东乔旭徐赵东
Owner NANJING UNIV OF SCI & TECH
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