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Preparation method of reverse osmosis membrane modified by oxidized graphene/polyvinyl alcohol coating

A polyvinyl alcohol, reverse osmosis membrane technology, applied in chemical instruments and methods, reverse osmosis, semi-permeable membrane separation, etc., can solve the problem of reverse osmosis membrane water flux reduction, polyvinyl alcohol coating peeling, reverse osmosis membrane water Flux impact and other issues, to achieve the effect of improving the water flux decline

Active Publication Date: 2018-01-30
宁波日新恒力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest disadvantage brought by this modification method is that it has a greater impact on the water flux of the reverse osmosis membrane, which greatly reduces the water flux of the reverse osmosis membrane, and with the use of polyvinyl alcohol in the reverse osmosis membrane The coating is easily soluble in water and peels off

Method used

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  • Preparation method of reverse osmosis membrane modified by oxidized graphene/polyvinyl alcohol coating

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Experimental program
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Effect test

Embodiment 1

[0030] Get m-phenylenediamine 70g, triethylamine 40g and camphorsulfonic acid 70g and add in 1000ml deionized water, and magnetically stir for 5min to prepare an aqueous phase solution (water phase solution m-phenylenediamine mass concentration 5.9%, triethylamine mass concentration 3.4%) %, camphorsulfonic acid 5.9%), get trimesoyl chloride 3g and add in 1000ml normal hexane, stir to dissolve, make trimesoyl chloride-n-hexane oil phase solution (0.3% of trimesoyl chloride mass concentration in oil phase solution ), the polysulfone support membrane is immersed in the aqueous phase solution, and the immersion time is 25s. After taking it out, the solvent deionized water is removed, and then immersed in the prepared trimesoyl chloride-n-hexane oil phase solution for interfacial polymerization reaction, interfacial polymerization The reaction time is 50s, remove the solvent n-hexane after taking it out, and obtain the nascent reverse osmosis membrane;

[0031] Dissolve 40 g of po...

Embodiment 2

[0035] Get m-phenylenediamine 70g, triethylamine 40g and camphorsulfonic acid 70g and add in 1000ml deionized water, and magnetically stir for 5min to prepare an aqueous phase solution (water phase solution m-phenylenediamine mass concentration 5.9%, triethylamine mass concentration 3.4%) %, camphorsulfonic acid 5.9%), get trimesoyl chloride 3g and add in 1000ml normal hexane, stir to dissolve, make trimesoyl chloride-n-hexane oil phase solution (0.3% of trimesoyl chloride mass concentration in oil phase solution ), the polysulfone support membrane is immersed in the aqueous phase solution, and the immersion time is 25s. After taking it out, the solvent deionized water is removed, and then immersed in the prepared trimesoyl chloride-n-hexane oil phase solution for interfacial polymerization reaction, interfacial polymerization The reaction time is 50s, remove the solvent n-hexane after taking it out, and obtain the nascent reverse osmosis membrane;

[0036] Dissolve 40 g of po...

Embodiment 3

[0040] Get m-phenylenediamine 70g, triethylamine 40g and camphorsulfonic acid 70g and add in 1000ml deionized water, and magnetically stir for 5min to prepare an aqueous phase solution (water phase solution m-phenylenediamine mass concentration 5.9%, triethylamine mass concentration 3.4%) %, camphorsulfonic acid 5.9%), get trimesoyl chloride 3g and add in 1000ml normal hexane, stir to dissolve, make trimesoyl chloride-n-hexane oil phase solution (0.3% of trimesoyl chloride mass concentration in oil phase solution ), the polysulfone support membrane is immersed in the aqueous phase solution, and the immersion time is 25s. After taking it out, the solvent deionized water is removed, and then immersed in the prepared trimesoyl chloride-n-hexane oil phase solution for interfacial polymerization reaction, interfacial polymerization The reaction time is 50s, remove the solvent n-hexane after taking it out, and obtain the nascent reverse osmosis membrane;

[0041] Dissolve 40 g of po...

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Abstract

The invention discloses a preparation method of a reverse osmosis membrane modified by an oxidized graphene / polyvinyl alcohol coating. The preparation method comprises the following steps of: preparing a nascent reverse osmosis membrane in advance, then coating polyvinyl-alcohol crosslinking reaction liquid containing oxidized graphene on the nascent reverse osmosis membrane, and finally obtainingthe reverse osmosis membrane modified by the oxidized graphene / polyvinyl alcohol coating. The preparation method disclosed by the invention has the advantages that the oxidized graphene and serine are introduced into the polyvinyl alcohol coating to carry out modification on the polyvinyl alcohol coating, so that the problems of reduction of water flux and easy dropping of the polyvinyl alcohol coating of the reverse osmosis membrane modified by the polyvinyl alcohol coating can be improved.

Description

technical field [0001] The invention relates to the field of preparation of a reverse osmosis membrane, in particular to a preparation method of a graphene oxide / polyvinyl alcohol coating modified reverse osmosis membrane. Background technique [0002] Reverse osmosis technology is a separation method that separates the solute and the solvent in the solution by means of the selective interception of the reverse osmosis membrane under a certain pressure. It is widely used in sewage treatment and liquid purification and concentration, the most common of which is The application is in the water treatment process, using reverse osmosis technology to remove impurities such as inorganic ions, bacteria, viruses, organic matter and colloids in raw water to obtain high-quality pure water. [0003] However, during the process of purifying water, the reverse osmosis membrane will also be polluted by some organic or inorganic substances in the water. For example, impurities such as inor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02B01D67/00B01D71/56C02F1/44
Inventor 不公告发明人
Owner 宁波日新恒力科技有限公司
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