Polyurethane elastomer composite material, preparation method and application

A technology of polyurethane elastomers and composite materials, applied in the fields of application, bulk chemical production, shoe soles, etc. Folding resistance and other issues, to achieve the effect of avoiding the reduction of folding resistance, high folding resistance, and reducing production costs

Pending Publication Date: 2022-05-27
XIAMEN KNANO GRAPHENE TECH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a certain contradiction between high wear resistance and high folding resistance in general. It is difficult to achieve high folding resistance when high wear resistance is high, and it is difficult to achieve high wear resistance when high folding resistance is high. It is impossible to achieve high wear resistance and high folding resistance at the same time.
[0004] Thermoplastic polyurethane elastomer (TPU) is widely used in shoe sole materials, but it cannot achieve high wear resistance and high folding resistance

Method used

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  • Polyurethane elastomer composite material, preparation method and application
  • Polyurethane elastomer composite material, preparation method and application

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preparation example Construction

[0027] The embodiment of the present invention provides a kind of preparation method of polyurethane elastomer composite material, comprises the following steps:

[0028] S1, configure 1 ~ 10wt% nano-SiO 2 solution and 0.5-5wt% graphene oxide slurry, the SiO 2 The solution was added to the graphene oxide slurry and dispersed ultrasonically to obtain graphene oxide / SiO 2 solution;

[0029] S2, the graphene oxide / SiO 2 The solution was stirred and evaporated at a temperature of 50-50°C to a batter-like state, and then freeze-dried at -50--10°C for 6-48 hours to obtain graphene oxide@SiO 2 Aerogel;

[0030] S3, the graphene oxide@SiO 2 Add airgel to water-based polyurethane, use a disperser to disperse for 20-40 minutes, then add a curing agent to disperse for 5-15 minutes, place it in a 50-50°C incubator to cure for 1-3 hours, take it out and place it in liquid nitrogen to embrittle 10-20 minutes, put it into a crusher and crush it, preferably into a powder below 100 mesh,...

Embodiment 1

[0043] S01: 10g nano-SiO 2 Dispersed in 2% formic acid solution to prepare 1wt% SiO 2 solution;

[0044] S02: 10g graphene oxide is dissolved in deionized water to prepare 1wt% graphene oxide slurry; SiO 2 The solution was added to 1wt% graphene oxide slurry, ultrasonically mixed and dispersed to obtain graphene oxide / SiO 2 solution;

[0045] S03: Graphene oxide / SiO 2 The solution was stirred at 50 °C to evaporate the aqueous solution to a batter, and the batter-like graphene oxide / SiO 2 The slurry was freeze-dried at -20 °C for 30 h to obtain graphene oxide@SiO 2 airgel.

[0046] S04: 1g graphene oxide@SiO 2 Add the airgel to 20g of water-based polyurethane with a solid content of 50%, use a disperser to disperse for 30 minutes, then add 2g of curing agent hexamethylene diisocyanate (HDI) to disperse for 10 minutes, place it in a 50°C incubator for 3 hours to form, and take it out Embrittle in liquid nitrogen for 20 minutes, put it into a crusher and crush it to 100 m...

Embodiment 2

[0049] S01: 20g nano-SiO 2 Dispersed in acetone solution to prepare 10wt% SiO 2 solution;

[0050] S02:4g graphene oxide is dissolved in deionized water to prepare 2wt% graphene oxide slurry; SiO 2 The solution was added to 2wt% graphene oxide slurry, ultrasonically mixed and dispersed to obtain graphene oxide / SiO 2 solution;

[0051] S03: Graphene oxide / SiO 2 The solution was stirred at 50 °C to evaporate the aqueous solution to a batter, and the batter-like graphene oxide / SiO 2 The slurry was freeze-dried at -20°C for 30 hours to obtain graphene oxide@SiO 2 airgel.

[0052] S04: 10g graphene oxide@SiO 2 Add the airgel to 100g of water-based polyurethane with a solid content of 20%, disperse for 30min with a disperser, then add 10g of curing agent diphenylmethane diisocyanate (MDI) to disperse for 10min, place it in a 50°C incubator for 1h to form, take it out and place Embrittle in liquid nitrogen for 20 minutes, put it into a crusher and crush it to 100 mesh powder,...

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Abstract

The invention provides a polyurethane elastomer composite material preparation method, which comprises: S1, preparing 1-10 wt% of a nanometer SiO2 solution and 0.5-5 wt% of a graphene oxide slurry, adding the SiO2 solution into the graphene oxide slurry, and carrying out ultrasonic dispersion to obtain a graphene oxide / SiO2 solution; s2, stirring the graphene oxide / SiO2 solution at the temperature of 50-50 DEG C to evaporate the aqueous solution until the aqueous solution is pasty, and performing freeze drying at the temperature of-50 to-10 DEG C for 6-48 hours to obtain graphene oxide coated SiO2 aerogel; s3, adding the graphene oxide coated SiO2 aerogel into waterborne polyurethane, dispersing for 20-40 minutes by using a dispersing machine, dropwise adding a curing agent, dispersing for 5-15 minutes, curing for 1-3 hours in an incubator at 50-50 DEG C, taking out, embrittling for 10-20 minutes in liquid nitrogen, and crushing in a crusher to obtain a waterborne polyurethane / graphene oxide coated SiO2 master batch; and S4, physically mixing the waterborne polyurethane / graphene oxide coated SiO2 master batch and a polyurethane elastomer, carrying out electrostatic adsorption, and carrying out injection molding at 160-200 DEG C to obtain the polyurethane elastomer composite material. The material has high wear resistance and high folding resistance.

Description

technical field [0001] The invention relates to a polyurethane elastomer composite material, a preparation method and an application, and belongs to the technical field of polyurethane elastomer material preparation. Background technique [0002] Thermoplastic polyurethane elastomer (TPU), with its excellent performance and wide application, has become one of the important thermoplastic elastomer materials, its molecules are basically linear, with little or no chemical crosslinking. There are many physical crosslinks formed by hydrogen bonds between the linear polyurethane molecular chains, and the hydrogen bonds strengthen its shape, thus endowing many excellent properties, such as high modulus, high strength, excellent wear resistance, Chemicals, hydrolysis resistance, high and low temperature resistance and mold resistance, etc. These good properties make thermoplastic polyurethane widely used in many fields such as shoe materials, cables, clothing, automobiles, medicine...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K3/36C08K3/04A43B13/04A43B13/18
CPCC08L75/04A43B13/04A43B13/187C08K2201/011C08K3/36C08K3/042Y02P20/54
Inventor 方崇卿黄卫明洪江彬林丽萍林建斌孙东升
Owner XIAMEN KNANO GRAPHENE TECH CORP
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