Preparation method of novel hollow sphere filled polyurethane-based composite material

A composite material and hollow sphere technology, which is applied in the field of preparation of new hollow sphere-filled polyurethane-based composite materials, can solve the problems of difficulty in controlling the foam size and the distribution of air bubbles, and little improvement in thermal and acoustic functions, and achieves composition Controllable structural design, excellent mechanical and acoustic properties, and easy operation.

Pending Publication Date: 2020-06-05
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After adding the above filling materials, although the mechanical properties of polyurethane can be greatly improved, its thermal and acoustic functional properties are not greatly improved, and the foam size and bubble distribution are difficult to control

Method used

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  • Preparation method of novel hollow sphere filled polyurethane-based composite material
  • Preparation method of novel hollow sphere filled polyurethane-based composite material
  • Preparation method of novel hollow sphere filled polyurethane-based composite material

Examples

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preparation example Construction

[0028] A method for modifying the surface of hollow spheres and a method for preparing polyurethane-based composite materials filled with hollow spheres. The specific method includes the following steps:

[0029] Step 1. Use absolute ethanol to clean the surface of the hollow ball for about 10 minutes to remove surface impurities and dirt, then put the hollow ball into an oven, dry it at 80°C for more than 6 hours, and take it out for later use.

[0030] Step 2, the surface modifier used in the present invention is a silane coupling agent, the amount of the coupling agent is 2% to 6% of the mass fraction of the hollow sphere, and the silane coupling agent needs to be hydrolyzed before the surface of the hollow sphere is hydrolyzed. modified.

[0031] Step 3: Add the hollow spheres to the hydrolyzed silane coupling agent solution, stir at an appropriate temperature for a period of time, then put the hollow spheres into an oven to dry, and take them out for later use.

[0032] ...

Embodiment 1

[0041] Step 1. Use absolute ethanol to clean the surface of the stainless steel hollow ball with a diameter of 2.5mm for 10 minutes to remove surface impurities and dirt, then put the stainless steel hollow ball into an oven, dry at 80°C for 6 hours, and take it out for use.

[0042] Step 2, the surface modifier used in the present invention is KH550 silane coupling agent, the amount of coupling agent is 3% of the mass fraction of stainless steel hollow spheres, and the KH550 silane coupling agent needs to be hydrolyzed before the stainless steel hollow spheres are hydrolyzed. surface modification. The hydrolysis process of KH550 is: volume fraction KH550 / ethanol / water=1 / 1 / 16, temperature 65°C, pH=6.0, hydrolysis for 45 minutes.

[0043] Step 3: Add stainless steel hollow spheres to the hydrolyzed KH550 silane coupling agent solution, stir at 65°C for 1 hour, then put the stainless steel hollow spheres in an oven to dry for 6 hours, take them out for later use.

[0044] Step ...

Embodiment 2

[0046] Step 1. Use absolute ethanol to clean the surface of the titanium alloy hollow sphere with a diameter of 2.5mm for 10 minutes to remove surface impurities and dirt, then put the stainless steel hollow sphere into an oven, dry at 80°C for 6 hours, and take it out for use.

[0047] Step 2, the surface modifier used in the present invention is KH550 silane coupling agent, the amount of coupling agent is 5% of the mass fraction of titanium alloy hollow spheres, and the KH550 silane coupling agent needs to be hydrolyzed before the titanium alloy hollow sphere Surface modification of balls. The hydrolysis process of KH550 is: volume fraction KH550 / ethanol / water=1 / 1 / 16, temperature 65°C, pH=6.0, hydrolysis for 45 minutes.

[0048] Step 3: Add the titanium alloy hollow spheres to the hydrolyzed KH550 silane coupling agent solution, stir at 65°C for 2 hours, then put the stainless steel hollow spheres in an oven to dry for 8 hours, take them out for later use.

[0049] Step 4: ...

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Abstract

The preparation method of the novel hollow sphere filled polyurethane-based composite material comprises the following steps: cleaning the surface of a hollow sphere to remove impurities and dirt on the surface, and drying for later use; wherein the used surface modifier is a silane coupling agent, and the silane coupling agent needs to be hydrolyzed; adding the hollow spheres into the hydrolyzedsilane coupling agent solution, stirring at a proper temperature, then putting the hollow spheres into a drying oven for drying, and taking out for later use; and adding the modified hollow spheres into a casting mold, sequentially adding isocyanate, hydroxyl-terminated polyester or hydroxyl-terminated polyether and other assistants, stirring to uniformly distribute the hollow spheres in the matrix, curing at room temperature, and demolding to obtain the hollow sphere filled polyurethane-based composite material. The production process is reasonable in design, and operation steps are simple and convenient; the components and the structural design of the composite material are controllable; the composite material has excellent mechanical and acoustic properties.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a novel polyurethane-based composite material filled with hollow balls, and belongs to the field of preparation of polyurethane-based composite materials filled with hollow balls. Background technique [0002] The full name of polyurethane is urethane, which is a kind of polymer material with urethane (-NH-COO-) repeating structural units on the macromolecular chain. Polyurethane is usually prepared by chemical reaction of isocyanate and hydroxyl-terminated polyester or hydroxyl-terminated polyether in a certain ratio. In the engineering field, polyurethane elastomers and polyurethane foams are widely used. Among them, polyurethane foam prepared by foaming technology has the advantages of low density, high strength, low thermal conductivity, low water absorption, sound absorption and sound insulation, etc., and is widely used in the fields o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G18/48C08K9/06C08K7/24
CPCC08G18/42C08G18/48C08K7/24C08K9/06
Inventor 姜风春于天淼果春焕王春鹤王振强王建东
Owner HARBIN ENG UNIV
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