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A polyurethane/nanometer hydrotalcite composite material with high damping, ultraviolet absorption and toughening properties and its preparation method

A nano-hydrotalcite and polyurethane material technology, which is applied in the field of polyurethane nano-hydrotalcite composite materials and its preparation, can solve the problems of heat resistance, poor performance, and low strength

Active Publication Date: 2018-02-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has some shortcomings, such as low strength, heat resistance, poor performance, etc., which limit its further application.

Method used

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  • A polyurethane/nanometer hydrotalcite composite material with high damping, ultraviolet absorption and toughening properties and its preparation method
  • A polyurethane/nanometer hydrotalcite composite material with high damping, ultraviolet absorption and toughening properties and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] I. Preparation of Organically Modified Hydrotalcite

[0036] 1).MgAl-NO 3 - Preparation of LDH precursor

[0037] a. Weigh 0.05molMg(NO3 ) 2 ·6H 2 O, 0.025molAl(NO 3 ) 3 9H 2 O, the two are mixed and dissolved in 100ml deionized water (the deionized water has been boiled with nitrogen to remove CO 2 , the same below), denoted as solution A;

[0038] b. Configure 100ml of NaOH solution 2 times the amount of metal ion moles in step a, denoted as solution B;

[0039] c. Slowly pour solution A and solution B into a vertical colloid mill (JM-50 type, the same below), the speed of the colloid mill is 4000r / min, after 3 minutes of nucleation, immediately transfer the slurry to a three-necked bottle, and pass it into Nitrogen, heated and stirred in a water bath at 90°C for 12 hours, and the mechanical stirring speed was 400r / min (the same below);

[0040] d. The product was fully washed with deionized water and centrifuged 4 times until the washing solution was colorle...

Embodiment 2

[0058] I. Preparation of Organically Modified Hydrotalcite

[0059] 1).MgAl-NO 3 - Preparation of LDH precursor

[0060] a. Weigh 0.05molMg(NO 3 ) 2 ·6H 2 O, 0.025molAl(NO 3 ) 3 9H 2 O, the two are mixed and dissolved in 100ml deionized water (the deionized water has been boiled with nitrogen to remove CO 2 , the same below), denoted as solution A;

[0061] b. Configure 100ml of NaOH solution 2 times the amount of metal ion moles in step a, denoted as solution B;

[0062] c. Slowly pour solution A and solution B into a vertical colloid mill (JM-50 type, the same below), the speed of the colloid mill is 4000r / min, after 3 minutes of nucleation, immediately transfer the slurry to a three-necked bottle, and pass it into Nitrogen, heated and stirred in a water bath at 90°C for 12 hours, and the mechanical stirring speed was 400r / min (the same below);

[0063] d. The product was fully washed with deionized water and centrifuged 4 times until the washing solution was color...

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PUM

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Abstract

The invention discloses a polyurethane / nano-hydrotalcite composite material and a preparation method thereof, belonging to the field of polymer nano-composite materials. The preparation process can be briefly summarized as the following steps: dodecylsulfonate intercalation on the nano-hydrotalcite precursor, graft modification on the surface of the silane coupling agent to obtain organically modified hydrotalcite with good dispersibility; synthesis of specific isocyanate content of polyurethane prepolymer; mix organic hydrotalcite with different content of polyurethane prepolymer, add specific amount of polyether polyol, crosslinking agent, catalyst in-situ polymerization; after a period of reaction, cast the product in the template Form a film to obtain a polyurethane nanometer hydrotalcite composite material. Compared with ordinary polyurethane materials, the composite material prepared by the invention has better damping characteristics, toughness and ultraviolet absorption capacity, and has low cost, simple process and excellent comprehensive performance, and has broad application prospects.

Description

technical field [0001] The invention belongs to the field of polymer nanocomposite materials, and in particular provides a polyurethane nanometer hydrotalcite composite material with high damping ultraviolet absorption and toughening properties and a preparation method thereof. Background technique [0002] In recent years, polymer nanocomposites are being paid more and more attention and researched. Polymer nanocomposites refer to new materials obtained by composite assembly of polymers as organic phases and organic phase nanoparticles or inorganic phase nanoparticles. Due to the processability, plasticity and functional diversity of polymers, it has become one of the main carriers of nanocomposites. Polymer-inorganic nanocomposites are an important branch of nanoscience and technology, and one of the important ways to prepare high-performance polymer materials. [0003] Polyurethane is a widely used polymer material, which can be used in coatings, adhesives, elastomers, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08K9/06C08K9/04C08K3/22C08J5/18C08G18/76C08G18/66C08G18/48C08G18/32C08G18/10
Inventor 闫东鹏张浩刘海梅张均姜志国
Owner BEIJING UNIV OF CHEM TECH