Organosilicon compound modified hydrophobic polyurethane foam and preparation method thereof

A technology of organosilicon compound and polyurethane foam, which is used in the preparation and application of oil-water separation materials, and can solve the problems of poor oil-water selectivity

Active Publication Date: 2021-09-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the poor oil-water selectivity of the oil-water separation substrate polyurethane foam in the above-mentioned prior art, and provide a hydrophobic polyurethane foam modified by an organosilicon compound and a preparation method thereof

Method used

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  • Organosilicon compound modified hydrophobic polyurethane foam and preparation method thereof
  • Organosilicon compound modified hydrophobic polyurethane foam and preparation method thereof
  • Organosilicon compound modified hydrophobic polyurethane foam and preparation method thereof

Examples

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Effect test

Embodiment 1

[0045] A kind of preparation method of the hydrophobic polyurethane foam modified by organosilicon compound, synthetic route is as follows figure 1 shown, including the following steps:

[0046] Step 1: Accurately weigh 20.0g of isocyanate-terminated polyurethane prepolymer in a three-necked flask, add 1.0g (5% of the mass fraction of isocyanate-terminated polyurethane prepolymer) of hydroxyl-terminated polydimethylsiloxane, and place at 75°C Under stirring for 40min; then cooled to room temperature. During this period, acetone was added dropwise to adjust the viscosity of the system.

[0047] Step 2: Add 40.0 g of distilled water to the above reaction system, set the mechanical stirrer at a speed of 900 rpm at room temperature, and stir the mixture rapidly for 40 seconds to obtain a mixed solution. The mixed solution was quickly transferred to an evaporating dish, and foamed and solidified at room temperature for 10 minutes to obtain a polyurethane foam. Then cut it into 2...

Embodiment 2

[0052] A kind of preparation method of the hydrophobic polyurethane foam modified by organosilicon compound, synthetic route is as follows figure 1 shown, including the following steps:

[0053] Step 1: Accurately weigh 20.0g of isocyanate-terminated polyurethane prepolymer in a three-necked flask, add 2.0g (10% of the mass fraction of isocyanate-terminated polyurethane prepolymer) of hydroxyl-terminated polydimethylsiloxane, at 70°C Next, stir for 50min; then cool to room temperature. During this period, acetone was added dropwise to adjust the viscosity of the system.

[0054] Step 2: 35.0 g of distilled water was added to the above reaction system, and the mixture was stirred rapidly for 40 s at room temperature with a mechanical stirrer at a speed of 900 rpm to obtain a mixed solution. The mixed solution was quickly transferred to an evaporating dish, and foamed and solidified at room temperature for 10 minutes to obtain a polyurethane foam. Then cut it into 2×2×2cm 3 ...

Embodiment 3

[0059] A kind of preparation method of the hydrophobic polyurethane foam modified by organosilicon compound, synthetic route is as follows figure 1 shown, including the following steps:

[0060] Step 1: Accurately weigh 20.0g of isocyanate-terminated polyurethane prepolymer in a three-necked flask, add 3.0g (15% of the mass fraction of isocyanate-terminated polyurethane prepolymer) of aminopropyl-terminated polydimethylsiloxane, and Stir at room temperature for 50 min, during which acetone is added dropwise to adjust the viscosity of the system.

[0061] Step 2: 30.0 g of distilled water was added to the above reaction system, and the mixture was rapidly stirred at room temperature at 850 rpm for 40 s to obtain a mixed solution. The mixed solution was quickly transferred to an evaporating dish, and foamed and solidified at room temperature for 10 minutes to obtain a polyurethane foam. Then cut it into 2×2×2cm 3 After washing three times with distilled water and absolute eth...

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Abstract

The invention discloses organosilicon compound modified hydrophobic polyurethane foam and a preparation method thereof, and belongs to the field of preparation and application of oil-water separation materials. The preparation method comprises the steps of firstly, reacting an isocyanate group with a hydroxyl group to generate a carbamate group, introducing an organosilicon chain segment into a polyurethane main chain, and then reacting with water to prepare polyurethane foam; and after chromic acid etching, grafting long-carbon-chain silane on the surface of the polyurethane foam, hydrolyzing the long-carbon-chain silane to generate silicon hydroxyl, and enabling the silicon hydroxyl and hydroxyl on the surface of the polyurethane foam to be subjected to dehydration condensation so as to obtain the organic silicon modified hydrophobic polyurethane foam. The silicon compound is reasonably introduced into a polyurethane system, so that the oil-water selectivity of the polyurethane foam is improved, and the hydrophobicity and lipophilicity of the polyurethane foam are improved. The test results of morphology characterization and water contact angle also prove that the hydrophobic polyurethane foam prepared by the invention can significantly improve the problem of poor oil-water selectivity of polyurethane foam in the oil-water separation process.

Description

technical field [0001] The invention belongs to the field of preparation and application of oil-water separation materials, and relates to a hydrophobic polyurethane foam modified by an organosilicon compound and a preparation method thereof. Background technique [0002] With the rapid development of economy and society, environmental issues are becoming more and more noteworthy. Frequent oil spills and the discharge of oily wastewater have caused great harm to the water environment, resulting in the emergence of many studies on oil-water separation. Among many studies, adsorption has attracted much attention due to its simple implementation and the recyclability of oil products. Traditional oil-absorbing materials have disadvantages such as low oil absorption ratio and poor durability, which limit the practical application of materials. Therefore, stable, durable, and high-capacity substrates are currently in urgent need of development for oil-water separation. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/08C08L75/04C08G18/61C08G101/00
CPCC08J9/40C08G18/61C08J2375/04C08G2110/0083Y02A20/204
Inventor 任龙芳汤正
Owner SHAANXI UNIV OF SCI & TECH
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