Preparation method of anti-fouling oil-water separation composite membrane

A composite membrane, sewage oil-water technology, applied in the separation method, liquid separation, semi-permeable membrane separation, etc., can solve the problems of chemical reagent secondary pollution, low efficiency of oil-water separation, complicated preparation process, etc., to speed up the precipitation, Effect of effective membrane flux, improved mechanical properties and corrosion resistance

Pending Publication Date: 2020-08-07
邱俊相
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. Low oil-water separation efficiency;
[0009] 2. The chemical reagents used in the oil-water separation process may cause secondary pollution;
[0010] 3. High energy consumption;
In summary, the oil-water separation membrane materials prepared by the existing technology usually require complex mechanical equipment, the preparation process is complex and energy-consuming, and the oil-water separation efficiency needs to be improved. Therefore, a low-cost and high-efficiency super-hydrophobic oil-water Separation membrane is of great significance

Method used

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  • Preparation method of anti-fouling oil-water separation composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In terms of parts by weight, weigh 10 parts of nano-titanium dioxide powder, 20 parts of polyvinyl alcohol, 8 parts of methanol, and 80 parts of deionized water, add polyvinyl alcohol into the deionized water, and stir at 200 r / min for 12 minutes at normal temperature. To obtain a polyvinyl alcohol solution, add nano-titanium dioxide powder into the polyvinyl alcohol solution, stir at a speed of 400 r / min in a water bath at 40° C. for 1 hour to obtain a nano-titanium dioxide suspension, and place the nano-titanium dioxide suspension in an ultrasonic disperser, Ultrasonic treatment at 300W for 40min at 30°C to obtain a nano-titanium dioxide dispersion. Slowly add methanol dropwise to the nano-titanium dioxide dispersion at a rate of 20mL / min, stir at room temperature for 20min at a speed of 160r / min, and place Centrifuge in a centrifuge at a speed of 3500r / min for 15min, remove the solid in the lower layer, wash 3 times with absolute ethanol, and dry in the shade at room ...

Embodiment 2

[0042] In parts by weight, weigh 15 parts of nano-titanium dioxide powder, 30 parts of polyvinyl alcohol, 12 parts of methanol, and 120 parts of deionized water, add polyvinyl alcohol into the deionized water, and stir at 220 r / min for 14 minutes at normal temperature. To obtain a polyvinyl alcohol solution, add nano-titanium dioxide powder into the polyvinyl alcohol solution, stir at a speed of 500 r / min for 1.5 h in a water bath at 45°C to obtain a nano-titanium dioxide suspension, and place the nano-titanium dioxide suspension in an ultrasonic disperser , under the condition of 35°C with a power of 350W for 50min to obtain a nano-titanium dioxide dispersion, methanol was slowly added dropwise to the nano-titanium dioxide dispersion at a rate of 30mL / min, stirred at a speed of 170r / min at room temperature for 25min, and then Place in a centrifuge and centrifuge at 3500r / min for 17min, remove the solid in the lower layer, wash 4 times with absolute ethanol, and dry in the shad...

Embodiment 3

[0044]In parts by weight, weigh 20 parts of nano-titanium dioxide powder, 40 parts of polyvinyl alcohol, 16 parts of methanol, and 160 parts of deionized water, add polyvinyl alcohol into the deionized water, and stir at a speed of 240 r / min for 16 minutes at room temperature. To obtain a polyvinyl alcohol solution, add nano-titanium dioxide powder into the polyvinyl alcohol solution, and stir at a speed of 600 r / min for 2 hours in a water bath at 50° C. to obtain a nano-titanium dioxide suspension, and place the nano-titanium dioxide suspension in an ultrasonic disperser, Ultrasonic treatment at 40°C with a power of 400W for 60min to obtain a nano-titanium dioxide dispersion, slowly add methanol dropwise to the nano-titanium dioxide dispersion at a rate of 40mL / min, stir at a speed of 180r / min for 30min at room temperature, and then place Centrifuge in a centrifuge at a speed of 3500r / min for 20min, remove the solid in the lower layer, wash 5 times with absolute ethanol, and d...

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Abstract

The invention relates to a preparation method of an anti-fouling oil-water separation composite membrane, and belongs to the technical field of oil-water separation. According to the invention, polyacrylamide and polyvinylidene fluoride are used as raw materials for preparing an anti-fouling oil-water separation composite membrane; when water passes through the mesh film, due to the hydrophilic effect of polyacrylamide on the surface of the polymer film, the water spreads and extends to form a layer of water membrane; once the oil drops are immersed into the liquid-gas-solid three-phase interface on the surface of the water membrane, the membrane is converted into a liquid-liquid-solid three-phase interface, and a medium of the model is converted into water from air; when the surface of the mesh film has relatively high roughness, the oil drops have a larger underwater contact angle; therefore, the underwater oleophobic performance is achieved; the polyacrylamide is also a polymer water treatment flocculant product, can adsorb suspended particles in water, plays a role in linking and bridging among the particles, enables fine particles to form large flocs, accelerates the precipitation speed, and can effectively prevent solid impurities from adhering to the surface of the membrane, so that the flux of the membrane can be effectively increased, and the service life of the membrane can be prolonged.

Description

technical field [0001] The invention relates to a preparation method of an anti-fouling oil-water separation composite membrane, belonging to the technical field of oil-water separation. Background technique [0002] With the development of human society, it becomes more and more important to separate oil and water from oil-water mixture. Oil leakage can directly cause serious environmental and ecological damage, because oil is flammable and can decompose to form other harmful chemicals, further polluting the natural environment, threatening aquatic habitats, and also endangering human health. In addition, the chemicals used in the clean-up process of the oil-water mixture may pose a hazard to the environment. Water scarcity in many arid regions has also increased the need for efficient oil-water separation technologies. In addition to these environmental and ecological concerns, drainage of water from fuel oil is of critical importance to the automotive, marine and aircra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/12B01D69/02B01D17/022
CPCB01D17/02B01D69/02B01D69/12B01D71/34B01D2325/36
Inventor 邱俊相
Owner 邱俊相
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