Polyurethane-base piezoelectric conductive intelligent composite damping material and preparation method thereof

A composite damping material and polyurethane technology, applied in the field of damping materials, to achieve the effects of widening the damping temperature range, low price, and improving the loss factor

Inactive Publication Date: 2013-09-11
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The piezoelectric-conductive damping material prepared by polarization with thermosetting polyurethane as the matrix, piezoelectric ceramic as the piezoelectric material, and conductive polyaniline as the conductive material has not been publicly reported.

Method used

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  • Polyurethane-base piezoelectric conductive intelligent composite damping material and preparation method thereof
  • Polyurethane-base piezoelectric conductive intelligent composite damping material and preparation method thereof
  • Polyurethane-base piezoelectric conductive intelligent composite damping material and preparation method thereof

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preparation example Construction

[0033] The preparation method of composite damping material of the present invention comprises the following steps:

[0034] 1) Preparation of polyurethane matrix: heat polyether diol in vacuum to remove moisture and air bubbles, then add diisocyanate, stir evenly, slowly heat up to reaction temperature 80±5°C, react for 2-3 hours, after the reaction is completed, place it at room temperature to form the polyurethane matrix , and the molar ratio of polyether diol to diisocyanate is 1:2.9; wherein, the polyether diol is TDB, and the diisocyanate is toluene diisocyanate (TDI). The purpose of vacuum heating polyether diol to remove moisture and air bubbles is to prevent the reaction of water and isocyanate to generate CO 2 Seriously affect the performance of the material. TDB was evacuated at 105°C for 2 hours and then cooled to 60°C, then TDI was metered and preheated, and reacted at 80°C for 2-3 hours.

[0035] 2) Treatment of piezoelectric ceramic lead zirconate titanate: us...

Embodiment 1

[0048] 1) Synthesis of polyurethane matrix: Add polyether diol TDB466.2g into a three-necked flask equipped with a vacuum device, keep vacuuming at 105°C for 2 hours to remove moisture in polyether glycol, stop vacuuming and cool down to 60°C Nearby, 117.7g of toluene diisocyanate TDI was added to the experimental device, the molar ratio of it to TDB was 2.9:1, and the temperature was gradually raised to 80°C for 2-3 hours to achieve a light yellow transparent viscous liquid.

[0049] 2) Treatment of piezoelectric ceramic lead zirconate titanate: use ethanol as a solvent to prepare a solution of 1-3wt% KH-550, take an equal amount of the solution and ceramic powder for stirring treatment, and stir at 60°C for 2- 4h, make it fully mixed, and after the solution is clarified, dry the separated ceramic powder at 110°C for 2h to obtain a surface-modified piezoelectric ceramic powder, and store it in a dry place for later use.

[0050] 3) Preparation of piezoelectric-conductive poly...

Embodiment 2

[0057] 1) Repeat step 1) in Example 1.

[0058] 2) Repeat step 2) in Example 1.

[0059] 3) Preparation of piezoelectric-conductive polyurethane composite damping material: Accurately weigh 20g of polyurethane matrix, 12g of piezoelectric ceramics, and 0.6g of conductive polyaniline particles at one time, ultrasonically disperse at 60°C for 0.5h, and then remove air bubbles and moisture in a vacuum drying oven. Then add 1.29 g of molten trimethylolpropane, stir slowly and evenly, and solidify at 100° C. to obtain a polyurethane composite damping material after degassing.

[0060] 4) Repeat step 4) in Example 1.

[0061] figure 1 Medium ω PANI =3% is the storage modulus versus temperature curve of the prepared damping material before polarization.

[0062] figure 2 Medium ω PANI =3% is the curve of the loss factor versus temperature before polarization of the prepared damping material.

[0063] image 3 Medium ω PANI =3% is the curve of storage modulus versus temperat...

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Abstract

The invention provides a polyurethane-base piezoelectric conductive intelligent composite damping material and a preparation method thereof. The polyurethane-base piezoelectric conductive intelligent composite damping material contains a polyurethane base body, a piezoelectric ceramic, a conducting particle and a curing agent, wherein the content of the piezoelectric particle accounts for 60% of the weight of the polyurethane base body, and the content of the conducting particle accounts for 2%-5% of the weight of the polyurethane base body. The composite damping material provided by the invention can be used for controlling the modulus and damping property of a composite material by controlling the proportion of the conducting particle and the piezoelectric particle in a polymer. The principle of the composite damping material is as follows: the piezoelectric damping composite material regulates the mechanical energy to transform the mechanical energy into electric energy by introducing the piezoelectric particle and the conducting particle to the polymer and regulating the proportion of the conducting particle and the piezoelectric particle, then the electric energy is transformed into heat energy in a certain conductive network to be consumed, and the viscoelasticity of the material is enhanced and the capacity of transforming mechanical vibration energy into the heat energy is enhanced through the addition of the piezoelectric particle and the conducting particle.

Description

technical field [0001] The invention relates to a damping material, and also relates to a preparation method of the damping material. Specifically, it is a polyurethane-based piezoelectric conductive composite damping material and a preparation method thereof. Background technique [0002] Mechanical vibration widely exists in transportation vehicles. Damping is one of the methods to effectively control vibration and noise in vibration reduction and noise reduction technology. It converts vibration mechanical energy into thermal energy and dissipates it, so as to achieve the purpose of vibration reduction and noise reduction. Therefore, damping materials have always been a research hotspot in this field. [0003] Polymer viscoelastic damping materials and damping structures have been used in engineering for decades, but with the development of industry, construction, transportation and society, people have higher and higher requirements for damping and noise reduction mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L79/02C08K9/06C08K3/24C08K5/053C08G18/48
Inventor 郭艳宏缪旭弘张密林冷栋梁房世宇于越
Owner HARBIN ENG UNIV
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