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Preparation method of sponge with high oil-absorbing performance for oil-water separation

A technology for oil-water separation and high oil absorption, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of low oil absorption rate, complicated preparation process, long adsorption time, etc., and achieve cost reduction, simple process, and simple process. easy effect

Active Publication Date: 2015-07-15
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a high oil-absorbing material for oil-water separation in order to improve the shortcomings of existing oil-absorbing materials such as low oil absorption rate, long adsorption time, and complicated preparation process.

Method used

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  • Preparation method of sponge with high oil-absorbing performance for oil-water separation
  • Preparation method of sponge with high oil-absorbing performance for oil-water separation
  • Preparation method of sponge with high oil-absorbing performance for oil-water separation

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take the polyurethane sponge and put it into a container, add a solution of γ-(methacryloyloxy)propyltrimethoxysilane (KH-570) with a mass concentration of 4% of the hydrophobic modifier prepared with ethanol as a solvent. The solution completely submerges the sponge, and the container is sealed. Stir at 50°C for 20 hours.

[0022] Heat and activate the sponge soaked in the hydrophobic modifier at 110° C. for 0.5 hour to obtain the oil-absorbing sponge. The oil absorption ratios of the oil-absorbing sponge obtained in this example to vegetable oil and lubricating oil are 118 times and 107 times of its own weight, respectively. The oil-absorbing sponge has excellent water-repellent and oil-absorbing characteristics. The oil droplets drop on the surface of the sponge and quickly penetrate into the interior of the sponge, leaving only a little oil on the surface; while the water droplets cannot penetrate into the oil-absorbing sponge, but remain in the shape of beads on t...

Embodiment 2

[0024] Put the polyurethane sponge into a container, add a 10% hydrophobic modifier KH-570 solution prepared with ethanol as a solvent, and require the solution to completely submerge the sponge and seal the container. Stir at 25°C for 1 hour.

[0025] Heat and activate the sponge soaked in the hydrophobic modifier at 75° C. for 16 hours to obtain the oil-absorbing sponge. The oil absorption rate of the sponge obtained in this embodiment to vegetable oil and lubricating oil is 94 times and 91 times of its own weight respectively.

Embodiment 3

[0027] Put the polyurethane sponge into a container, add a hydrophobic modifier-aminopropyltriethoxysilane (KH550) solution prepared with methanol as a solvent with a mass concentration of 5%, and require the solution to completely submerge the sponge and seal the container. Stir at 40°C for 10 hours.

[0028] Heat and activate the sponge soaked in the hydrophobic modifier at 50° C. for 20 hours to obtain the oil-absorbing sponge. The sponge obtained in the present embodiment has an oil absorption rate of 91 times of its own weight to vegetable oil and lubricating oil.

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Abstract

The invention relates to a preparation method of a sponge with a high oil-absorbing performance for oil-water separation. The preparation method comprises the following steps: processing the surface of polyurethane sponge skeleton by a modifier to obtain a hydrophobic modified layer, and then heating the processed sponge to activate the sponge so as to obtain oil-absorbing sponge. The modified sponge has an ultrathin hydrophobic modified layer, thus the characteristics of high porosity and high elasticity of polyurethane sponge are preserved, and at the same time the modified sponge has a high performance on absorbing oil. The prepared oil-absorbing sponge only absorbs the oil and does not absorb the water. The absorbed oil amount is tens to hundreds of the weight of the sponge. The oil can be absorbed by the sponge by simple squeezing. The sponge has the characteristics of low cost, simple and practical technology, and good reusability, can be produced massively, and is advantageously used in the fields such as water oil pollutant removal, petroleum exploitation, industrial oil pollutant separation, and the like.

Description

technical field [0001] The invention relates to a preparation method of a high oil absorption material for oil-water separation, in particular to a preparation method of a low-cost, high oil absorption rate and reusable high oil absorption sponge for oil-water separation. Background technique [0002] With the rapid development of economy and the wide application of petroleum and its various downstream products, the pollution of oil to water has become a serious problem affecting the ecological environment, among which the problem of oil leakage is particularly serious. Oil spill accidents make toxic compounds quickly enter the food chain, ranging from low algae to high mammals. The current treatment method for this problem is mainly adsorption treatment. Adsorbent materials can be divided into natural adsorbent materials and synthetic adsorbent materials. Natural adsorption materials such as straw, cotton and wool products, and inorganic mineral zeolites have the advantag...

Claims

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Application Information

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IPC IPC(8): B01D17/022
Inventor 秦渊智汪勇
Owner NANJING UNIV OF TECH
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