Preparation method of super-hydrophilic/underwater super-oleophobic filter paper

An underwater super-oleophobic and super-hydrophilic technology, which is applied in the direction of filter paper, separation methods, chemical instruments and methods, etc., can solve the problems of poor corrosion resistance, low separation efficiency of filter paper, poor recycling performance, etc. Weak force, good separation effect, excellent durability and cycle performance

Active Publication Date: 2021-06-18
陕西鸿鑫耐斯环保科技有限公司
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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 provide a preparation method of superhydrophilic / underwater superoleophobic filter paper, which solves the problems of low separation efficiency, poor corrosion resistance and poor recycling performance of filter paper in oil-water separation in the prior art

Method used

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  • Preparation method of super-hydrophilic/underwater super-oleophobic filter paper
  • Preparation method of super-hydrophilic/underwater super-oleophobic filter paper
  • Preparation method of super-hydrophilic/underwater super-oleophobic filter paper

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Embodiment 1

[0031] First, mix 0.41g of tetraethyl orthosilicate and 0.04g of acetylacetone and stir at room temperature for 1 hour, then add 0.216g of distilled water to the solution and dilute to 20ml with absolute ethanol, and continue to stir at room temperature for 4 hours , Add 0.01 g of nitric acid dropwise during stirring. After the stirring, the sol was allowed to stand and age for 12 hours to obtain 0.1 mol / L SiO 2 Sol, coated with a layer of SiO on the surface of filter paper by dip coating 2 gel, the immersion time is 1 min to ensure SiO 2 Complete infiltration of the sol on the filter paper fibers. After the filter paper was centrifuged at a speed of 500 rpm for 0.5 min, it was dried naturally at room temperature of 25°C. Put the filter paper on a heating platform at 80°C, and irradiate the surface of the filter paper with ultraviolet light with a wavelength of 257.3nm for 15 minutes to prepare the surface-deposited SiO 2 Functional filter paper with ceramic layer. figure...

Embodiment 2

[0033] First, mix 1.666g of tetraethyl orthosilicate and 0.16g of acetylacetone and stir at room temperature for 1.5 hours, then add 0.864g of distilled water to the solution and dilute to 20ml with absolute ethanol, and continue to stir at room temperature for 5 hours , drop 0.04g of nitric acid in the process of stirring. After stirring, the sol can be aged for 12 hours to obtain 0.4mol / L SiO 2 Sol. A layer of SiO was coated on the surface of filter paper by dip coating 2 Sol, the immersion time is 2 minutes. After the above treated filter paper was centrifuged at a speed of 1000 rpm for 1 minute, it was placed in an environment of 50° C. to dry. Put the filter paper on a heating platform at 100°C, and irradiate the surface of the filter paper with ultraviolet light with a wavelength of 257.3nm for 30 minutes to prepare the surface-deposited SiO 2Functional filter paper with ceramic layer. The static contact angle of functional filter paper surface to 1M HCl aqueous sol...

Embodiment 3

[0035] First, mix 2.499g of tetraethyl orthosilicate and 0.24g of acetylacetone and stir at room temperature for 2 hours. After stirring, add 1.296g of distilled water to the solution and dilute to 20ml with absolute ethanol, and continue to stir at room temperature for 6 Hour, in the process of stirring, drop the nitric acid of 0.06g. After stirring, the sol can be aged for 12 hours to obtain 0.6mol / L SiO 2 Sol, coated with a layer of SiO on the surface of filter paper by dip coating 2 Sol, the immersion time is 2 minutes. After the above treated filter paper was centrifuged at a speed of 1500 rpm for 1 minute, it was placed in an environment of 70° C. to dry. Place the filter paper on a heating platform at 120°C, and irradiate the surface of the filter paper with ultraviolet light with a wavelength of 257.3nm for 40 minutes to prepare the surface-deposited SiO 2 Functional filter paper with ceramic layer. The static contact angle of functional filter paper surface to 1M ...

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Abstract

The invention discloses a preparation method of super-hydrophilic/underwater super-oleophobic filter paper. The preparation method is specifically implemented according to the following steps: step 1, preparing SiO2 sol; step 2, coating the SiO2 gel on the surface of the filter paper through dipping, centrifuging and drying treatment in sequence at room temperature; and step 3, converting the SiO2 gel layer on the surface of the filter paper into a hydrophilic SiO2 ceramic layer by adopting ultraviolet light degradation combined with a low-temperature heat treatment process, thereby completing the preparation of the super-hydrophilic/underwater super-oleophobic filter paper. The problems that in the prior art, the filter paper is low in separation efficiency, poor in corrosion resistance and poor in recycling performance in oil-water separation are solved.

Description

technical field [0001] The invention belongs to the technical field of superhydrophilic / underwater superoleophobic materials, and relates to a preparation method of superhydrophilic / underwater superoleophobic filter paper. Background technique [0002] In the field of material surface bionics, the phenomenon of superhydrophilic / underwater superoleophobic on the surface of fish scales has received extensive attention. The superhydrophilic / underwater superoleophobic material can allow water to penetrate smoothly, while oil stains will be blocked by its surface, so it exhibits excellent separation efficiency in the separation of low-density oil / water mixtures. The superhydrophilic / underwater superoleophobic materials that have been developed so far are usually hydrophilic polymers, but the preparation process of such polymer materials is complicated, expensive, and the recycling performance is not good, which cannot meet the requirements of large-scale engineering. application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/08D21H17/68D21H25/06
CPCD21H27/08D21H17/68D21H25/06
Inventor 段宗范李张圆卢艳芬赵高扬
Owner 陕西鸿鑫耐斯环保科技有限公司
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