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A preparation method for superhydrophobic polyurethane sponge/iron oxide composite material for oil-water separation

A polyurethane sponge and composite material technology, applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problems of weak oil absorption and water resistance, poor material recycling performance, and low separation efficiency, and achieve high oil absorption capacity Effect

Active Publication Date: 2017-12-26
江苏固诺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention: the interfacial wetting characteristics of the current oil-water separation materials are not obvious, the oil absorption and water resistance are weak, a large amount of water is also absorbed while oil absorption, the separation efficiency is low, and the material recycling performance is poor. , provides a method for preparing superhydrophobic polyurethane sponge / iron oxide composite material for oil-water separation. In the present invention, the polyurethane sponge is ultrasonically cleaned with dichloromethane and deionized water respectively, and a roughening solution is configured, and the cleaned Polyurethane sponge is used for coarsening, and ferric chloride hexahydrate and ethylene glycol are used to prepare magnetic iron oxide particles by magnetic separation. Add dodecanethiol to the magnetic iron oxide and adjust the pH value and ultrasonic dispersion. Add trishydroxymethylaminomethane to the dispersion, mix evenly, add polyurethane sponge to it, stir, wash and dry. The present invention builds micro-nano structure on the surface of sponge and introduces low surface energy substances by preparing iron oxide particles , to prepare composite materials with superhydrophobic and superoleophilic properties, so that the composite materials have the advantages of high oil absorption capacity, selective separation of oil-water mixture, quick recovery of oil products and material recycling

Method used

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Examples

Experimental program
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Effect test

example 1

[0016] First take a piece of polyurethane sponge with a size of 10cm×8cm×2cm, put the sponge in methylene chloride solution for ultrasonic cleaning for 1 hour, then take it out and put it in deionized water for ultrasonic cleaning for 50 minutes, take it out after cleaning, and put it in a 60°C Dry it in an oven for 40 minutes. Take 40mL of chromium oxide with a mass concentration of 100g / L and 20mL of a sulfuric acid solution with a mass concentration of 80g / L, mix them evenly, and prepare a roughening solution. Put the above-mentioned dried polyurethane sponge in a coarse Roughen in the chemical solution for 2 minutes, take it out after roughening, and immediately wash it with distilled water for 3 times to remove the residual roughening solution, then dry the polyurethane sponge in an oven at 50°C for 30 minutes, and keep it for later use; put it in a 250mL three-necked flask Add 5g of ferric chloride hexahydrate and 50mL of ethylene glycol respectively, stir until the solid...

example 2

[0019]First take a piece of polyurethane sponge with a size of 10cm×8cm×2cm, put the sponge in methylene chloride solution for ultrasonic cleaning for 1.5 hours, then take it out and put it in deionized water for ultrasonic cleaning for 55 minutes, take it out after cleaning, and put it at 63°C Dry it in an oven for 45 minutes; take 45mL of chromium oxide with a mass concentration of 100g / L and 25mL of a sulfuric acid solution with a mass concentration of 80g / L and mix them evenly to prepare a coarsening solution. Place the above-mentioned dried polyurethane sponge in Roughen in the roughening solution for 2.5 minutes, take it out after roughening, and immediately wash it with distilled water 4 times to remove the residual roughening solution, then dry the polyurethane sponge in an oven at 53°C for 35 minutes, and keep it for later use; Add 6g of ferric chloride hexahydrate and 55mL of ethylene glycol into the flask, stir until the solids are completely dissolved, then add 7g o...

example 3

[0022] First, take a piece of polyurethane sponge with a size of 10cm×8cm×2cm, first put the sponge in methylene chloride solution for ultrasonic cleaning for 2 hours, then take it out and put it in deionized water for ultrasonic cleaning for 60 minutes, take it out after cleaning, and put it in a 65°C Dry it in an oven for 50 minutes. Take 50mL of chromium oxide with a mass concentration of 100g / L and 30mL of a sulfuric acid solution with a mass concentration of 80g / L, mix them evenly, and prepare a roughening solution. Put the above-mentioned dried polyurethane sponge in a coarse Roughen in the chemical solution for 3 minutes, take it out after roughening, and immediately rinse it with distilled water for 5 times to remove the residual roughening solution, then dry the polyurethane sponge in an oven at 55°C for 40 minutes, and keep it for later use; in a 250mL three-necked flask Add 7g of ferric chloride hexahydrate and 60mL of ethylene glycol respectively, stir until the sol...

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Abstract

The invention discloses a preparation method of a super-hydrophobic polyurethane sponge / iron oxide composite material used for oil-water separation and belongs to the field of composite materials. The preparation method comprises the following steps: carrying out ultrasonic washing on polyurethane sponge by dichloromethane and de-ionized water respectively to prepare a coarsening solution; coarsening the washed polyurethane sponge; preparing magnetic iron oxide particles from substances including ferric trichloride hexahydrate, glycol and the like through a magnetic separation method; adding 1-dodecanethiol into the magnetic iron oxide, adjusting the pH value and carrying out ultrasonic dispersion; adding tri-hydroxymethyl aminomethane into the dispersion solution, uniformly mixing and adding the polyurethane sponge; and stirring, washing and drying to obtain the super-hydrophobic polyurethane sponge / iron oxide composite material. According to the prepared iron oxide particles, a micro-nano structure is constructed on the surface of the sponge and low-surface-energy substances are introduced to prepare the composite material with super-hydrophobic and super-oleophylic properties, so that the composite material has the advantages of high oil absorption capability, selective separation of oil-water mixtures, rapid recycling of oil products and cyclic utilization of the material.

Description

technical field [0001] The invention discloses a method for preparing a superhydrophobic polyurethane sponge / iron oxide composite material for oil-water separation, belonging to the field of composite materials. Background technique [0002] In modern society, the rapid economic development has produced a large amount of industrial water resources polluted by organic matter. Similarly, marine pollution incidents such as oil spills are prone to occur in the process of oil extraction, transportation, and storage. These oil-polluted water sources have caused great damage to the ecological environment. How to quickly and efficiently separate oil-water from oil-polluted water sources has attracted widespread attention from governments and the public. The methods for oil-water separation mainly include centrifugal method, gravity method, adsorption method, flotation method, biological oxidation method and chemical method. When choosing an oil-water separation method, factors such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D17/022
CPCB01D17/0202B01J20/06B01J20/26
Inventor 朱波
Owner 江苏固诺新材料科技有限公司
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