A high-throughput containing a-c 3 no 4 /ag 3 po 4 Forward osmosis membrane of composite material and preparation method thereof

A technology of composite material and forward osmosis membrane, which is applied in the field of forward osmosis membrane, can solve problems such as restricting the development of forward osmosis membrane and membrane pollution, and achieve the effects of shortening the transmission path of water molecules, simplifying the preparation process, and inhibiting growth and reproduction

Active Publication Date: 2021-10-01
青岛海若智能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual operation process, the "upper limit balance" between water flux and salt interception and membrane fouling restrict the development of forward osmosis membranes.

Method used

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  • A high-throughput containing a-c <sub>3</sub> no <sub>4</sub> /ag <sub>3</sub> po <sub>4</sub> Forward osmosis membrane of composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A high-throughput a-C containing 3 N 4 / Ag 3 PO 4 The preparation method of forward osmosis membrane comprises steps as follows:

[0057] (1) Preparation of CNT dispersion: 10 mg of carbon nanotubes and 100 mg of sodium dodecylbenzenesulfonate were added to 100 ml of deionized water, and ultrasonically treated with a 300W power ultrasonic cleaner for 30 min to disperse the solute evenly in the solution. Then sonicate for 10 h with an ultrasonic cell pulverizer. Centrifuge the mixed solution for 30 minutes, take the supernatant and dilute it with pure water to obtain a dilution; then add dopamine to the dilution under heating and stirring, add 10 mg of dopamine to each 150 mL of dilution, keep stirring at 40°C for 1 hour, and add to the dilution. Add Tris-HCl buffer (pH=8.5) to the system, keep stirring at 40°C for 24 hours, add 10 mL of Tris-HCl buffer to every 150 mL of diluent, centrifuge the reacted dispersion for 30 min, and take the centrifuged supernatant , t...

Embodiment 2

[0066] The high throughput containing a-C described in embodiment 1 3 N 4 / Ag 3 PO 4 The preparation method of the forward osmosis membrane, the difference is that,

[0067] In step (3), a-C in the aqueous phase solution 3 N 4 / Ag 3 PO 4 The concentration of composite material is 0.3g / L.

Embodiment 3

[0069] The high throughput containing a-C described in embodiment 1 3 N 4 / Ag 3 PO 4 The preparation method of the forward osmosis membrane, the difference is that,

[0070] In step (3), a-C in the aqueous phase solution 3 N 4 / Ag 3 PO 4 The concentration of composite material is 0.4g / L.

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Abstract

The present invention relates to a kind of high flux containing a-C 3 N 4 / Ag 3 PO 4 Forward osmosis membrane of composite material and preparation method thereof, the present invention uses carbon nanotube-containing CNT-based membrane as substrate, through interfacial polymerization reaction between polyamine and polyacyl chloride, a-C 3 N 4 / Ag3PO4 composite material was successfully embedded in the polyamide layer generated by the reaction of m-phenylenediamine and trimesoyl chloride, and a new type of TFC membrane was prepared. Compared with the traditional TFC membrane, because CNT shortens the water molecule transfer path, reduces the water quality transfer resistance, and promotes the rapid transport of water molecules, and a‑C 3 N 4 The a‑C3N4 in the / Ag3PO4 composite can provide additional nanochannels, thereby increasing the water permeation rate of the forward osmosis membrane, the separation performance of the forward osmosis membrane has been significantly improved, and the composite material has abundant negative charges, thereby increasing electronegativity of the membrane surface. The surface of the membrane is not easy to adsorb pollutants, and its antifouling performance is greatly improved.

Description

technical field [0001] The invention relates to a high-throughput a-C-containing 3 N 4 / Ag 3 PO 4 A forward osmosis membrane of a composite material and a preparation method thereof belong to the technical field of forward osmosis membranes. Background technique [0002] With the development of society and the continuous growth of population, fresh water resources are decreasing day by day, and the problem of water pollution is becoming more and more serious. To solve this problem, obtaining high-quality fresh water through seawater desalination is an effective method. [0003] Thin-film composite forward osmosis membranes (TFCFO) prepared by interfacial polymerization have been widely used due to their low energy consumption, high flux, and simple operation. However, in the actual operation process, the "upper limit balance" between water flux and salt interception and membrane fouling restrict the development of forward osmosis membranes. Compared with the traditional...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/02B01D69/12
CPCB01D67/0079B01D69/02B01D69/12B01D2325/48
Inventor 王志宁王栋
Owner 青岛海若智能技术有限公司
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