Modification method for establishing water channel by utilizing molybdenum disulfide to enhance water flux of polyamide reverse osmosis membrane

A technology of molybdenum disulfide and reverse osmosis membrane, which is applied in chemical instruments and methods, permeation/dialysis water/sewage treatment, semi-permeable membrane separation, etc., can solve problems that cannot meet practical applications, and improve water flux and salinity Interception performance, improvement of water permeability, and improvement of penetration efficiency

Inactive Publication Date: 2018-06-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that the reverse osmosis membrane existing in the prior art needs to be further improved in terms of water flux and salt intercepti

Method used

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  • Modification method for establishing water channel by utilizing molybdenum disulfide to enhance water flux of polyamide reverse osmosis membrane

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Example Embodiment

[0018] Specific embodiment 1: This embodiment records a modification method that uses molybdenum disulfide to establish a water channel to enhance the water flux of a polyamide reverse osmosis membrane. The specific steps of the method are as follows:

[0019] Step 1: Configure a mixed solution of 0.005%~0.2% molybdenum disulfide and 1~3% m-phenylenediamine;

[0020] Step 2: Pour the mixed solution prepared in Step 1 on the surface of the polyethersulfone-based membrane and keep it for 10 minutes;

[0021] Step 3: Remove the mixed solution on the surface of the polyethersulfone base membrane in Step 2, and dry it with nitrogen for 5 minutes;

[0022] Step 4: Pour the 0.1% mass fraction of 1,3,5-trimellitic acid chloride n-hexane solution on the surface of the polyethersulfone-based membrane obtained in step 3 to make 1,3,5-trimellitic acid chloride n-hexane solution Fully react with polyethersulfone base membrane for 1 min;

[0023] Step 5: Remove the 1,3,5-trimellitic acid chloride n-...

Example Embodiment

[0025] Specific embodiment 2: The modification method of using molybdenum disulfide to establish water channels to enhance the water flux of polyamide reverse osmosis membrane described in specific embodiment 1. In step 1, the mass fraction of molybdenum disulfide is 0.005% ~0.05%.

Example Embodiment

[0026] Specific embodiment 3: The modification method of using molybdenum disulfide to establish water channels to enhance the water flux of polyamide reverse osmosis membrane described in specific embodiment 1. In step 1, the mass fraction of m-phenylenediamine is 2 %.

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Abstract

The invention relates to a modification method for establishing a water channel by utilizing molybdenum disulfide to enhance the water flux of a polyamide reverse osmosis membrane, and belongs to thefield of material modification. The method comprises the following steps: preparing a molybdenum disulfide and m-phenylenediamine mixed solution; pouring the mixed solution on the surface of a polyether sulfone-based membrane and maintaining for 10 minutes; taking out the polyether sulfone-based membrane and blow-drying by nitrogen; pouring a 1,3,5-toluenyl chloride n-hexane solution on the surface of the polyether sulfone-based membrane to enable the 1,3,5-toluenyl chloride n-hexane solution and the polyether sulfone-based membrane to completely react for 1 minute; taking out the polyether sulfone-based membrane, blow-drying with nitrogen and removing the redundant solution; and placing the prepared membrane in a drying oven with the temperature of 60 DEG C and reacting for 15 minutes. The method has the following advantages: single-layer nanometer molybdenum disulfide has a two-dimensional layered structure similar to graphene, only has the thickness of 1 nanometer, is filled with nanometer pores, and can leak a large amount of sea water and remain salt and other components during sea water desalination and salt interception to fulfill the aims of sea water desalination and saltinterception. The method is simple in process and convenient in preparation.

Description

technical field [0001] The invention belongs to the field of material modification, and in particular relates to a modification method for enhancing the water flux of a polyamide reverse osmosis membrane by using molybdenum disulfide to establish a water channel. Background technique [0002] Reverse osmosis technology is a new type of technology at this stage. It can intercept small molecules of monovalent and divalent salt particles. It can be used in brackish water desalination, household water purification and other fields. It has a very broad application prospect and is widely used. Known as "the water purification technology of the 21st century". Among all reverse osmosis membranes, polyamide reverse osmosis membranes have better mechanical strength, higher water flux and salt rejection performance, and are currently the most widely used, occupying the main market of reverse osmosis membranes. Although the water flux and salt interception performance of polyamide reve...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/10B01D71/68C02F1/44C02F103/08
CPCB01D67/0088B01D67/0093B01D69/10B01D71/68B01D2325/26C02F1/441C02F2103/08Y02A20/131
Inventor 张春华刘雅薇刘超王超林欧凯
Owner HARBIN INST OF TECH
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