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Preparation method of non-woven fabric-based super-hydrophobic filter membrane

A non-woven-based, super-hydrophobic technology, applied in the field of environmental engineering, can solve the problems of high energy consumption, high operating cost, complex preparation process, etc., and achieve the effects of low energy consumption, good hydrophobicity, and simple preparation process

Inactive Publication Date: 2018-12-14
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of complex preparation process, high operating cost, and large energy consumption in the preparation of superhydrophobic oil-water separation membranes, the purpose of the present invention is to provide a simple and effective method for preparing non-woven fabric-based superhydrophobic membranes.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of non-woven fabric-based super-hydrophobic filter membrane
  • Preparation method of non-woven fabric-based super-hydrophobic filter membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) irradiate the PP non-woven fabric under the ultraviolet lamp with a wavelength of 172nm for 2 minutes to obtain the non-woven fabric irradiated by the ultraviolet lamp;

[0025] 2) dissolving sodium silicate in 30mL deionized water, and uniformly dispersing it under the action of mechanical stirring to obtain a sodium silicate solution with a concentration of 20wt%;

[0026] 3) Add 3-aminopropyl tris(trimethylsiloxy)silane to the sodium silicate solution obtained in step 2) with a concentration of 20 wt%, and the mass ratio of sodium silicate to silane is 1:1. Under the action of mechanical stirring, it is uniformly dispersed to obtain a sodium silicate solution containing silane;

[0027] 4) Slowly add 12 mL of absolute ethanol dropwise to the silane-containing sodium silicate solution obtained in step 3), let it stand for 6 hours, and then place it in a water bath at 70°C for 180 minutes to obtain hydrophobic SiO 2 Sol;

[0028] 5) Place the non-woven fabric irra...

Embodiment 2

[0031] 1) irradiating the PET non-woven fabric under an ultraviolet lamp with a wavelength of 222nm for 2 minutes to obtain a non-woven fabric irradiated by an ultraviolet lamp;

[0032] 2) dissolving sodium silicate in 30mL deionized water, and uniformly dispersing it under the action of mechanical stirring to obtain a sodium silicate solution with a concentration of 30wt%;

[0033] 3) Add octadecyltrimethoxysilane to the sodium silicate solution with a concentration of 30 wt% obtained in step 2), the mass ratio of sodium silicate to silane is 2:1, and make it uniform under the action of mechanical stirring Disperse to obtain a silane-containing sodium silicate solution;

[0034] 4) Slowly add 16 mL of absolute ethanol dropwise to the silane-containing sodium silicate solution obtained in step 3), let it stand for 6 hours, and then place it in a water bath at 80°C for 210 minutes to obtain hydrophobic SiO 2 Sol;

[0035] 5) Place the non-woven fabric irradiated by UV lamp o...

Embodiment 3

[0038] 1) Irradiate the PVA nonwoven fabric under a UV lamp with a wavelength of 308nm for 2 minutes to obtain a nonwoven fabric irradiated by the UV lamp;

[0039] 2) dissolving sodium silicate in 30mL deionized water, and uniformly dispersing it under the action of mechanical stirring to obtain a sodium silicate solution with a concentration of 40wt%;

[0040] 3) Add octadecyltrimethoxysilane to the 40wt% sodium silicate solution obtained in step 2), the mass ratio of sodium silicate to silane is 3:1, and make it uniform under the action of mechanical stirring Disperse to obtain a silane-containing sodium silicate solution;

[0041] 4) Slowly add 18 mL of absolute ethanol dropwise to the silane-containing sodium silicate solution obtained in step 3), let it stand for 6 hours, and then place it in a water bath at 80°C for 240 minutes to obtain hydrophobic SiO 2 Sol;

[0042] 5) Place the non-woven fabric irradiated by UV lamp obtained in step 1) on the hydrophobic SiO obtai...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a preparation method of a non-woven fabric-based super-hydrophobic filter membrane. The method is characterized in that hydrophobic SiO2 particles are prepared by combining a sol-gel method and hydrophobic modification, the hydrophobic SiO2 particles are grafted to the surface of a non-woven fabric, and the non-woven fabric-based super-hydrophobic filter membrane is obtained after thermal curing. The method is rapid and efficient, is low in cost, and is suitable for preparation of the non-woven fabric-based super-hydrophobic filter membrane. The prepared non-woven fabric-based super-hydrophobic filter membrane is simple in preparation process, low in energy consumption, low in production cost and good in hydrophobicity. The invention provides the preparation methodof the super-hydrophobic filter membrane, and the preparation method can be used for large-scale production. Meanwhile, breakthrough of the technical problem of separating oil and organic solvents from oil-containing wastewater is facilitated, and the preparation method has important environmental and social benefits.

Description

technical field [0001] The invention relates to a method for preparing a super-hydrophobic filter membrane, in particular to a method for preparing a non-woven fabric-based super-hydrophobic filter membrane, and belongs to the technical field of environmental engineering. Background technique [0002] In recent years, with the continuous development of petroleum-related industries, oily sewage is increasing. At the same time, the leakage of crude oil during exploration, transportation and storage is also an important factor causing environmental and ecological damage. For example, the Gulf of Mexico oil spill in 2010 released more than 210 million gallons of crude oil, seriously polluted the marine ecosystem, and had a negative impact on the financial and tourism industries. Separation of oil and organic matter from oily wastewater is a global challenge to save energy and protect the environment. Traditional purification techniques include air flotation, adsorption, floccu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/48B01D71/30B01D71/26B01D69/02B01D67/00B01D17/022
CPCB01D17/085B01D67/0079B01D69/02B01D71/26B01D71/30B01D71/48B01D2325/38
Inventor 张勇陈艳霞徐素芹姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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