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Super-hydrophobic three-dimensional porous material and preparation method thereof

A three-dimensional porous, super-hydrophobic technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of oil-water selectivity to be improved, insufficient stability, complicated introduction process, etc.

Inactive Publication Date: 2020-04-28
XIAN UNVERSITY OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the current technology is mature enough for practical application, the hydrophobicity of these materials is still not high enough, and the oil-water selectivity needs to be improved
[0003] Prior art literature (Synthesis of Polyurethane Foams Loaded with TiO 2 Nanoparticles and Their Modification for Enhanced Performance in OilSpill Cleanup[J].Ind.Eng.Chem.Res.2018,57,8918-8926.) Introduce TiO directly on polyurethane sponge 2 Nanoparticles, changing the hydrophobicity of the sponge surface, the synthesis process is the TiO 2 Nanoparticles are added to polyisocyanate, and after ultrasonic dispersion, they are introduced into a solution with surfactants, solubilizers, and catalysts. The introduction process is complicated; the literature (Atwo-step hydrophobic fabrication of melamine sponge for oil absorption and oil / water separation[ J].Surface&Coatings Technology.339(2018),147–154) first introduced SiO on the sponge surface through a two-step method 2 particles, and then introduce vinyltrimethoxysilane on top of it
But its introduction of SiO 2 The impregnation method of particles is combined by intermolecular forces, and the stability is not enough

Method used

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  • Super-hydrophobic three-dimensional porous material and preparation method thereof
  • Super-hydrophobic three-dimensional porous material and preparation method thereof
  • Super-hydrophobic three-dimensional porous material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0052] ①Pretreatment of melamine sponge

[0053] Take 5 melamine sponge blocks of 30×20×20mm, wash them with distilled water and deionized water in turn, and then wash them with an appropriate amount of absolute ethanol in an ultrasonic cleaner for 3 times, each time for 30 minutes, to remove surface impurities, and then dry them naturally. spare.

[0054] ②MS / TiO 2 Synthesis

[0055] Using absolute ethanol as a solvent, prepare a TBOT / absolute ethanol solution with a concentration (volume fraction) of 20%, soak the pretreated sponge block in the above solution, take it out after soaking for 3.5 hours at room temperature, and place it in a container 1 / 3 of the container volume of water in a wet closed system for hydrolysis (see figure 1 ), take it out after 17 hours, then wash it three times with an appropriate amount of absolute ethanol, and let it dry naturally.

[0056] ③ MS / TiO 2 Synthesis of / PDMS

[0057] Using n-hexane as a solvent, prepare PDMS / n-hexane solutions...

Embodiment 5～9

[0058] ①Pretreatment of melamine sponge

[0059] Take 6 melamine sponge blocks of 30×20×20mm, wash them with distilled water and deionized water in turn, and then wash them with an appropriate amount of absolute ethanol in an ultrasonic cleaner for 3 times, each time for 30 minutes, to remove surface impurities, and then dry them naturally. spare.

[0060] ②MS / TiO 2 Synthesis

[0061] Using absolute ethanol as a solvent, the TBOT concentration (volume fraction) of the preparation is 5%, 10%, 15%, 20% and 25% TBOT / absolute ethanol solution successively, and the 5 sponge blocks after pretreatment are soaked in respectively In the above solution, take it out after immersing at room temperature for 3.5 hours, and then place it in a moist closed system filled with an appropriate amount of water for hydrolysis (for the device see figure 1 ), take it out after 17 hours, then wash it three times with an appropriate amount of absolute ethanol, and let it dry naturally. (the TBOT tr...

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Abstract

The invention relates to a super-hydrophobic three-dimensional porous material and a preparation method thereof, and belongs to the technical field of oil-water separation. The super-hydrophobic three-dimensional porous material comprises a three-dimensional porous skeleton structure material and a modified material coating the surface of the three-dimensional porous skeleton structure material, wherein the modified material is prepared from TiO2 nanoparticles and polydimethylsiloxane. The preparation method of the super-hydrophobic three-dimensional porous material comprises: attaching TiO2 nanoparticles to the surface of a three-dimensional porous skeleton structure material by adopting a sol-gel method, and then attaching polydimethylsiloxane to the surface of the prepared material by adopting an impregnation method. The super-hydrophobic three-dimensional porous material has high oil-water selectivity and high adsorption capacity, is simple in preparation process, low in cost and high in adsorption capacity, and can be recycled.

Description

technical field [0001] The invention relates to the technical field of oil-water separation, and more specifically, to a super-hydrophobic three-dimensional porous material and a preparation method thereof. Background technique [0002] Melamine sponge has good flexibility due to its own network porous structure, showing the chemical characteristics of lipophilicity and hydrophilicity. We modified the chemical composition of its backbone surface to change it from hydrophilic to hydrophobic for oil-water separation applications. At present, the modification methods of melamine sponge are mainly to modify nanoparticle substances such as graphene oxide and silicon dioxide on its surface, silanization or fluorination. However, fluorination has no application prospect due to its toxicity and secondary pollution. According to the current research status, modified materials with simple preparation process, low cost, high absorption capacity, easy large-scale production, no second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/42C09K3/32C08L61/28
CPCC08J9/40C08J9/42C09K3/32C08J2361/28C08J2483/04
Inventor 杨菊香杨雪莹孙平翟云会贾园
Owner XIAN UNVERSITY OF ARTS & SCI
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