Spray coating type composite polyurethane-urea damping material for subway tunnel

A composite damping material, subway technology, applied in the field of materials, to achieve the effect of simple construction technology, simple and efficient construction technology, and low cost

Inactive Publication Date: 2016-03-23
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spray-coating composite polyurethane-urea damping material of the present invention is not only green and environmentally friendly, but also has a simple construction process; it also greatly improves the damping effect of the material, which is of great significance for solving the vibration and noise problems of urban rail transit

Method used

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  • Spray coating type composite polyurethane-urea damping material for subway tunnel
  • Spray coating type composite polyurethane-urea damping material for subway tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The intercalated graphite filler is composed of graphite sheets and high molecular polymers between the graphite sheets; the high molecular polymers are introduced between the graphite sheets by in-situ polymerization; the high molecular polymers are Polyacrylic acid.

[0023] The preparation method of the intercalated graphite filler comprises the following steps: ① expanding the expandable graphite at a temperature of 950° C. for 12 seconds to obtain expanded graphite; ② combining the expanded graphite obtained in step ① with a 95% ethanol-water solution Mix according to the weight ratio of 1:200, ultrasonically treat for 9h, then finally filter and dry to obtain graphite flakes with large interlayer spacing; ③Use the method of in-situ polymerization to introduce polyacrylic acid into the graphite flakes obtained in step ②, thereby An intercalated graphite filler is obtained.

[0024] A spray-coated composite damping material for subway tunnels. The spray-coated comp...

Embodiment 2

[0026] The intercalated graphite filler is composed of graphite sheets and high molecular polymers between the graphite sheets; the high molecular polymers are introduced between the graphite sheets by in-situ polymerization; the high molecular polymers are Polyamidoamine Dendrimers.

[0027] The preparation method of the intercalated graphite filler comprises the following steps: ① expanding the expandable graphite at a temperature of 1000° C. for 15 seconds to obtain expanded graphite; ② combining the expanded graphite obtained in step ① with a concentration of 75% ethanol-water solution Mix according to the weight ratio of 1:250, ultrasonically treat for 12 hours, then finally filter and dry to obtain graphite flakes with large interlayer spacing; ③Introduce polyamidoamine dendrimers into the graphite obtained in step ② by in-situ polymerization Between the flakes, an intercalated graphite filler is obtained.

[0028] A spray-coated composite damping material for subway tu...

Embodiment 3

[0030] The intercalated graphite filler is composed of graphite sheets and high molecular polymers between the graphite sheets; the high molecular polymers are introduced between the graphite sheets by in-situ polymerization; the high molecular polymers are hyperbranched polyurethane.

[0031] The preparation method of the intercalated graphite filler comprises the following steps: ① expanding the expandable graphite at a temperature of 1050° C. for 10 seconds to obtain expanded graphite; ② combining the expanded graphite obtained in step ① with an 85% ethanol-water solution Mix according to the weight ratio of 1:300, ultrasonically treat for 6h, then finally filter and dry to obtain graphite flakes with large interlayer spacing; ③Use the method of in-situ polymerization to introduce hyperbranched polyurethane into the graphite flakes obtained in step ②, Thus an intercalated graphite filler is obtained.

[0032] A spray-coated composite damping material for subway tunnels. Th...

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Abstract

The invention provides a spray coating type composite polyurethane-urea damping material for a subway tunnel. The spray coating type composite polyurethane-urea damping material is prepared from a component A and a component R in a volume ratio being (1:0.8)-(1:1.2) through reaction, wherein the component A is a semi-prepolymer synthesized by 35-60 parts of polyisocyanate with low functionality and 50-70 parts of polyether polyol; the component R comprises 15-60 parts of a diamine chain extender, 10-75 parts of amine-terminated polyether, 10-70 parts of hydroxyl terminated polyether, 1-30 parts of intercalated graphite packing and 1-30 parts of an assistant. The intercalated graphite packing comprises graphite flake layers and high-molecular polymers located between the graphite flake layers; the high-molecular polymers are introduced to gaps between the graphite flake layers with an in-situ polymerization method. The spray coating type composite polyurethane-urea damping material is environment-friendly, and the construction process is simple; furthermore, the damping effect of the material is greatly improved, and the material has great significance for solving the problems of vibration and noise of urban rail transit.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a damping material for subway tunnels, in particular to a composite polyurethane-urea damping material for subway tunnels and a preparation method thereof. Background technique [0002] The vibration and noise generated during the operation of urban rail transit have a great negative impact on the health and safety of residents along the line, the protection of buildings, and the normal work of precision instruments. One of the main means of controlling subway vibration is to use damping materials to make damping structures to achieve the purpose of reducing vibration and noise. At present, damping materials are divided into materials, mainly including rubber sheets and polymer coatings. Rubber sheets are mainly various rubber damping pads, damping rubber sheets, rubber shock absorbers, etc. During construction, adhesives are required to stick the rubber sheets to the treated parts. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/12C08G18/42C08G18/48
CPCC08G18/4018C08G18/4277C08G18/4833C08G2350/00C08K3/04C08K9/04C09D7/62C09D175/08
Inventor 黄微波冯超吕平胡晓马衍轩万菲马明亮卢桂霞
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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