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Large-flux hydrophilic oleophobic oil-water separation membrane with antibacterial function as well as preparation and application of membrane

A technology of oil, oil and water, which is applied in the field of hydrophilic, oil-repellent, oil-water separation membrane and its preparation, which can solve the problems of environmental and biological hazards, the inability to improve membrane flux, etc., and achieve the advantages of increased strength, increased speed, and strong bactericidal ability Effect

Active Publication Date: 2018-08-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inorganic nanoparticles used are solid particles, and a micro-nano rough binary structure is constructed in the oil-water separation membrane, but the membrane flux cannot be improved, and the fluoroalkylsiloxane solution used is a fluorine-containing material, which will Environmental and Biological Hazards

Method used

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  • Large-flux hydrophilic oleophobic oil-water separation membrane with antibacterial function as well as preparation and application of membrane
  • Large-flux hydrophilic oleophobic oil-water separation membrane with antibacterial function as well as preparation and application of membrane
  • Large-flux hydrophilic oleophobic oil-water separation membrane with antibacterial function as well as preparation and application of membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Synthesis of porous nano silica:

[0057] (1-1) Add 0.5g of porogen CTAB and 0.14g of catalyst NaOH into the reaction vessel, add 240mL of deionized water, and stir at 80°C (500r / min) for 1h. After the system in the vessel becomes homogeneous, Slowly pour 2.5mL of silicon source TEOS into the constant flow pump in 30min, keep it warm for 2h after dripping, and form a white suspension; the molar ratio of each material is TEOS:NaOH:CTAB=1:0.3:0.2;

[0058] (1-2) Filter the resulting white suspension with a vacuum filter, then wash the resulting solid with deionized water, then put it in a 60°C oven and dry it for 12 hours, then put it in a muffle furnace for calcination ( From room temperature to 650°C at a rate of 2°C / min, and kept at this temperature for 6h), the porous SiO 2 (i.e. porous nano-silica);

[0059] (2) Modification of porous nano silica

[0060] (2-1) Drying the porous nano silica in a vacuum oven at 100°C for 24 hours;

[0061] (2-2) Ultrasonically...

Embodiment 2

[0078] (1) Synthesis of porous silica particles:

[0079] (1-1) 1.0g porogen CTAB and 0.2g catalyst NH 3 ·H 2 O (mass concentration in aqueous solution: 25%) was added to the reaction vessel, 240mL of deionized water was added, and stirred at a constant temperature of 85°C (480r / min) for 1h. Add 2.5mL of silicon source TEOS, keep it warm for 2h after dripping, and generate a white suspension; the molar ratio of each material is TEOS:NH 3 ·H 2 O:CTAB=1:0.5:0.4;

[0080] (1-2) Filter the resulting white suspension with a vacuum filter, then wash the resulting solid with deionized water, then put it in a 60°C oven and dry it for 12 hours, then put it in a muffle furnace for calcination ( From room temperature to 650°C at a rate of 2°C / min, and kept at this temperature for 6h), the porous SiO 2 (i.e. porous nano-silica);

[0081] (2) Modification of porous nano silica

[0082] (2-1) Drying the porous nano silica in a vacuum oven at 100°C for 24 hours;

[0083] (2-2) Ultras...

Embodiment 3

[0093] (1) Synthesis of porous silica particles:

[0094] (1-1) 2.5g porogen PEG2000 and 0.2g catalyst NH 3 ·H 2 O (mass concentration 25%) was added to the reaction vessel, 240mL of deionized water was added, stirred at 85°C (500r / min) for 1h, and after the system in the vessel became homogeneous, 2.5 mL of silicon source TEOS, keep it warm for 1 hour after dripping to form a white suspension; the molar ratio of each material is TEOS:NH 3 ·H 2 O: PEG2000 = 1:0.5:0.1;

[0095] (1-2) Filter the resulting white suspension with a vacuum filter, then wash the resulting solid with deionized water, then put it in a 60°C oven and dry it for 12 hours, then put it in a muffle furnace for calcination ( From room temperature to 650°C at a rate of 2°C / min, and kept at this temperature for 6h), the porous SiO 2 (i.e. porous nano-silica);

[0096] (2) Modification of porous nano silica

[0097] (2-1) Drying the porous nano silica in a vacuum oven at 100°C for 24 hours;

[0098] (2-2...

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Abstract

The invention belongs to the technical field of oil-water separation membranes, and discloses a large-flux hydrophilic oleophobic oil-water separation membrane with an antibacterial function as well as preparation and application of the membrane. The preparation method comprises the following steps: (1) performing a reaction on a silane coupling agent and porous silicon dioxide in a protective gasby using an organic solvent as a reaction medium to obtain modified porous silicon dioxide, wherein the silane coupling agent is a silane coupling agent containing a quaternary ammonium salt group; (2) preparing a suspension from the modified porous silicon dioxide by adopting water to obtain a modified porous silicon dioxide suspension; and mixing the modified porous silicon dioxide suspension and a polyvinyl alcohol aqueous solution to obtain a mixed solution; and (3) enabling the mixed solution to form a film on a screen mesh to obtain the hydrophilic oleophobic oil-water separation membrane. The oil-water separation membrane disclosed by the invention has a high membrane flux and high bactericidal ability; addition of the modified porous silicon dioxide improves strength of the separation membrane; and the separation membrane disclosed by the invention is environmentally friendly. The invention also discloses the application of the oil-water separation membrane in separation of oil-containing wastewater.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation membranes, and relates to a hydrophilic-oleophobic oil-water separation membrane with large membrane flux and antibacterial function, a preparation method and application thereof. Background technique [0002] In recent years, a large amount of oily wastewater has been produced in various industries, and some wastewater can meet the national discharge standards after cleaning. And some sewage is directly discharged into the environment without degreasing or unqualified after degreasing, destroying the ecological environment. Water is one of the basic requirements for survival on this planet, however, the earth's fresh water resources are limited, and with the passage of time, the global population and water usage continue to increase. Protecting and improving the water body environment and preventing and controlling oil pollution are environmental issues of common concern in the worl...

Claims

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Application Information

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IPC IPC(8): B01D71/38B01D69/02B01D67/00B01D61/40C02F1/44C02F1/40
CPCB01D61/40B01D67/0079B01D69/02B01D71/38B01D2325/02B01D2325/24B01D2325/48C02F1/40C02F1/44
Inventor 涂伟萍招嘉斯卢明胡剑青王锋凡宇王若男
Owner SOUTH CHINA UNIV OF TECH
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