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Adsorption material with selectivity and preparation method thereof

An adsorption material and selective technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of limited application, complex preparation methods, etc., achieve good oil absorption capacity, simple modification process, mild effects

Pending Publication Date: 2021-12-21
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, commercial sponges, including polyurethane sponges and melamine sponges, are not selective for oil and water, limiting their use in oil absorption
A certain modification method can make the sponge have oil-water selectivity, that is, it only absorbs oil but not water. However, the preparation methods of selective adsorption materials that have been reported are usually relatively complicated, so a simple modification method is needed to make the substrate material have oil-water selectivity. sex

Method used

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  • Adsorption material with selectivity and preparation method thereof
  • Adsorption material with selectivity and preparation method thereof
  • Adsorption material with selectivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: as figure 1 Shown, a kind of selective adsorption material preparation method comprises the following steps:

[0029] (1) Mix vinyltrimethoxysilane and ethanol evenly (the ratio of the amount of substances is 1:5), add acid to adjust the pH to 3, then stir to complete the hydrolysis process, then add alkali to adjust the pH to 9 for gelation, wait After the gel is formed, it is aged for 24 hours and dried to constant weight to obtain a block of airgel, which is ground through a 400-mesh sieve to obtain airgel powder, and the powder with a mass fraction of 5% is ultrasonically dispersed in n-hexane to form a suspension liquid.

[0030] (2) Immerse the commercial polyurethane sponge cut into pieces with a viscosity of 500cs polydimethylsiloxane, 10wt% methyltrimethoxysilane and n-hexane mixture and stir for 1 hour, then pour the prepared suspension into Among them, the mass ratio of commercial polyurethane sponge to airgel particles is 1:10, the sponge is ...

Embodiment 2

[0031] Embodiment 2: as figure 2 Shown, a kind of selective adsorption material preparation method comprises the following steps:

[0032] (1) Mix vinyltrimethoxysilane and ethanol evenly (the ratio of the amount of substances is 1:10), add acid to adjust the pH to 4 and then stir to complete the hydrolysis process, then add alkali to adjust the pH to 10 for gelation, wait After the gel is formed, it is aged for 12 hours and dried to a constant weight to obtain a block airgel, which is then ground through a 300-mesh sieve to obtain an airgel powder, and the powder with a mass fraction of 7% is ultrasonically dispersed in n-hexane to form a suspension liquid.

[0033] (2) Immerse the commercial polyurethane sponge cut into pieces with a viscosity of 2000cs polydimethylsiloxane, 5wt% propyltriacetoxysilane and n-hexane mixture and stir for 1 hour, then pour the prepared suspension The mass ratio of sponge to airgel particles was 1:5. After stirring for 1 hour, the sponge was ...

Embodiment 3

[0034] Embodiment 3: as image 3 Shown, a kind of selective adsorption material preparation method comprises the following steps:

[0035] (1) Mix vinyltrimethoxysilane and ethanol evenly (the ratio of the amount of substances is 1:15), add acid to adjust the pH to 2 and then stir to complete the hydrolysis process, then add alkali to adjust the pH to 8 for gelation, wait After the gel is formed, it is aged for 36 hours and dried to constant weight to obtain a block of airgel, which is then ground through a 600-mesh sieve to obtain an airgel powder, and the powder with a mass fraction of 10% is ultrasonically dispersed in n-hexane to form a suspension liquid.

[0036] (2) Immerse the commercial polyurethane sponge cut into pieces with a viscosity of 5000cs polydimethylsiloxane, 10wt% methyl tributylketoxime silane and n-hexane mixed solution and stir for 1 hour, then prepare the suspension Pour it into it, the mass ratio of sponge to airgel particles is 1:15, continue to sti...

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Abstract

The invention provides an adsorption material with selectivity and a preparation method thereof. The hydrophobic and oleophylic performance of a substrate material is improved by loading the hydrophobic modified gel particles on the surface, and the adsorption material has the beneficial effects that an elastic porous material with high porosity is selected as a substrate, so that the adsorption material has very good oil absorption capacity; the modified material can only absorb oil but not absorb water from an oil-water mixture, the modified material can be extruded and desorbed, the modification process is simple, the condition is mild, and the prepared material can be recycled for multiple times.

Description

technical field [0001] The invention belongs to the technical field of oil absorbing materials and environmental protection, and relates to a selective absorbing material and a preparation method thereof. Background technique [0002] In recent years, frequent oil and various chemical leakage accidents have caused serious harm to the ecological environment. How to quickly eliminate the leaked oil and chemicals and avoid wider pollution is an urgent problem to be solved. [0003] Currently commonly used separation methods include gravity separation, centrifugation, flotation, membrane separation, adsorption, advanced oxidation, biological methods, etc. Among various treatment methods, the application prospect of the adsorption method using porous materials as the adsorbent is very broad. This method is low in cost, easy to operate, wide in application range, and eco-friendly. Traditional adsorption materials can be divided into three categories: inorganic minerals, polymers,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
CPCB01J20/262B01J20/28047B01J20/28045C02F1/285
Inventor 胡杰程俊杰周学军叶铨斌
Owner JIANGSU UNIV
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