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

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...

AI Technical Summary

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 interception during use, and cannot meet the practical application problem, and provides a water channel enhancement using molybdenum disulfide Modification method of polyamide reverse osmosis membrane water flux

Images