Viscoelastic damping material with good conductivity and preparing method thereof

A technology of electrical conductivity and damping material, which is applied in the field of viscoelastic damping material, viscoelastic damping material and its preparation, can solve the problems of limited damping effect, limited electrical conductivity, inability to meet the technical indicators of performance, and achieve good damping performance. , The effect of increasing electrical conductivity and wide temperature range

Inactive Publication Date: 2016-03-09
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its limited electrical conductivity, the piezoelectric conductive epoxy resin composite damping material cannot be used in technical fields that require high electrical performance parameters, such as welding of composite damping steel plates, forming and processing of mechanical parts of precision dampers, etc. Performance Specifications
In addition, the damping mechanism of the damping material is a conversion mechanism of mechanical energy-electric energy-thermal energy, and the damping effect is good under the state of tension or compression, but the damping effect is relatively limited under the state of shear or torsion force

Method used

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  • Viscoelastic damping material with good conductivity and preparing method thereof

Examples

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Embodiment 1

[0025] The viscoelastic damping material with good electrical conductivity is obtained by reacting components A and B at a volume ratio of 1:0.8. Component A is a semi-prepolymer synthesized by 50 parts of low-functionality polyisocyanate and 30 parts of polyether polyol by weight; said B component is made of 50 parts by weight of diamines The chain extender consists of 65 parts of amino-terminated polyether, 10 parts of conductive carbon nanotubes, 1 part of pigment, 2 parts of surfactant, 22 parts of inert filler and 30 parts of additives. The low-functionality polyisocyanate is toluene diisocyanate, and the polyether polyol is polypropylene glycol ether. The diamine chain extender is N,N'-dialkylmethyldiamine; the amino-terminated polyether is an amino-terminated polyether containing a main chain of polyethylene oxide. Described tensio-active agent is sodium dodecylbenzene sulfonate (SDBS); Described filler is quartz powder; Described auxiliary agent is made up of 18 parts...

Embodiment 2

[0033] The difference from Example 1 is that the viscoelastic damping material with good electrical conductivity is obtained by reacting component A and component B at a volume ratio of 1:0.9. Component A is a semi-prepolymer synthesized by 55 parts of low-functionality polyisocyanate and 40 parts of polyether polyol by weight; said B component is made of 60 parts by weight of diamines The chain extender consists of 30 parts of amino-terminated polyether, 16 parts of conductive carbon nanotube, 8 parts of pigment, 4 parts of surfactant, 30 parts of inert filler and 1 part of auxiliary agent. The low-functionality polyisocyanate is polymethylene diisocyanate, and the polyether polyol is polyglycerol ether. The diamine chain extender is N,N'-dialkylphenylenediamine; the amino-terminated polyether is an amino-terminated polyether containing propylene oxide main chain. Described tensio-active agent is polyvinylpyrrolidone (PVP); Described filler is mica powder; Described auxiliar...

Embodiment 3

[0041] The difference from Example 1 is that the viscoelastic damping material with good electrical conductivity is obtained by reacting component A and component B at a volume ratio of 1:0.9. Component A is a semi-prepolymer synthesized by 60 parts of low-functionality polyisocyanate and 50 parts of polyether polyol by weight; Component B is made of 25 parts by weight of diamine chain extension agent, 40 parts of amino-terminated polyether, 12 parts of conductive carbon nanotubes, 20 parts of pigment, 5 parts of surfactant, 1 part of inert filler and 10 parts of auxiliary agent. The low-functionality polyisocyanate is cyclohexane diisocyanate, and the polyether polyol is polytetrahydrofuran ether diol. The diamine chain extender is 3,3'-dichloro,4,4'-diaminodiphenylmethane; the amino-terminated polyether is an amino-terminated polyether containing a main chain of polyethylene oxide. The surfactant is cetyltrimethylammonium bromide (CTAB); the filler is talcum powder; the aux...

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Abstract

The invention provides a viscoelastic damping material with good conductivity and a preparing method thereof. The viscoelastic damping material with good performance is obtained by reacting a component A and a component B according to the volume ratio of 1:0.8-1:1.1. The component A is a semi-prepolymer synthesized by 50-70 parts of low-functionality-degree polyisocyanate and 20-50 parts of polyether polyol, the component B is prepared from 25-60 parts of a diamine chain extender, 30-65 parts of amine-terminated polyether and conductive carbon nano tubes, wherein the conductive carbon nano tubes are modified carbon nano tubes, and the weight percent of the conductive carbon nano tubes in the viscoelastic damping material is 5.5-7.0%. The viscoelastic damping material with good performance is capable of accurately controlling conductivity mutation of the conductive damping material in a vadose threshold value region. A conductive phase is capable of forming an intact conductive channel and effectively converting electric charges into heat energy to be dissipated, and can achieve certain self-adaptive damping controlling performance.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a viscoelastic damping material, in particular to a viscoelastic damping material with good performance and a preparation method thereof. Background technique [0002] With the development of machinery manufacturing, transportation and construction industries, various high-power mechanical power equipment is increasing, and the vibration and noise hazards it brings are becoming increasingly prominent. Vibration will not only cause damage to engineering structures and reduce service life, but also affect the work efficiency, work quality and work precision of machinery and instruments. In addition, people who work in environments exposed to vibration and noise for a long time will experience various discomforts and various symptoms. Therefore, controlling vibration and noise is one of the urgent problems to be solved, and corresponding vibration and noise reduction measures must be taken...

Claims

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Application Information

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IPC IPC(8): C08G18/10C08G18/32C08G18/48C08G18/50C08G18/66C08K7/24C08K9/04C08K3/34C08K3/36
CPCC08G18/10C08G18/3228C08G18/4825C08G18/4829C08G18/4854C08G18/5024C08G18/6685C08G2350/00C08K3/34C08K3/36C08K7/24C08K9/04C08K2201/001
Inventor 黄微波马衍轩吕平胡晓马明亮冯超万菲卢桂霞
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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