A kind of preparation method and application of hydrophilic and antibacterial double modified ultrafiltration membrane

A dual modification, ultrafiltration membrane technology, applied in the field of ultrafiltration membranes, can solve the problems of difficulty in simultaneously achieving hydrophilic, antibacterial dual modification, and loss of bacteriostatic agents, achieving good mechanical properties, improving antibacterial properties, and increasing permeability. amount of effect

Active Publication Date: 2022-01-07
HARBIN ENG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing ultrafiltration membrane material is difficult to simultaneously realize the dual modification of hydrophilicity and antibacterial, and the bacteriostatic agent is easy to lose from the surface of the modified membrane, and to provide a graphene oxide-based hydrophilic, Preparation method of antibacterial double modified ultrafiltration membrane and its application in sewage purification and seawater desalination pretreatment

Method used

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  • A kind of preparation method and application of hydrophilic and antibacterial double modified ultrafiltration membrane
  • A kind of preparation method and application of hydrophilic and antibacterial double modified ultrafiltration membrane
  • A kind of preparation method and application of hydrophilic and antibacterial double modified ultrafiltration membrane

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specific Embodiment approach 1

[0023] Specific embodiment one: the preparation method of the hydrophilic and antibacterial double modified ultrafiltration membrane of this embodiment is implemented according to the following steps:

[0024] 1. Preparation of quaternized graphene oxide (GO-Q) modifier: Add graphene oxide to an organic solvent for ultrasonic treatment to obtain a (uniform and stable) graphene oxide suspension, and add it to the graphene oxide suspension Add a condensing agent and 3-dimethylaminopropylamine to react, collect the reactant after the reaction, add the washed and dried reactant and long-chain halogenated alkanes to the organic solvent, and fully react at 20-80°C for 8-24 hours. After cleaning and drying, the quaternized graphene oxide modifier is obtained;

[0025] 2. Preparation of hydrophilic and antibacterial double-modified ultrafiltration membrane: Add quaternized graphene oxide modifier to organic solvent to obtain (homogeneous and stable) GO-Q suspension by ultrasonic dispe...

specific Embodiment approach 2

[0027] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the condensing agent described in step one is 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC ), N-hydroxysuccinimide (NHS), N-hydroxysulfosuccinimide (SULFO-NHS), 4-dimethylaminopyridine (DMAP), N-hydroxybenzotriazole (HOBT), One or more mixtures of N,N-dicyclohexylcarbodiimide (DCC).

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the long-chain haloalkane described in step one is one or more of chlorobutane, bromobutane, chloropentane, and bromopentane kind of mixture.

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Abstract

The invention relates to a preparation method and application of a double-modified ultrafiltration membrane of hydrophilicity and antibacterial properties. The invention belongs to the technical field of ultrafiltration membranes and aims to solve the problem that the existing ultrafiltration membrane materials are difficult to achieve double modification of hydrophilicity and antibacterial properties at the same time. Preparation method: add condensing agent and 3-dimethylaminopropylamine to the graphene oxide suspension to react, add the cleaned reactant and long-chain halogenated alkanes into an organic solvent, and fully react at 20-80°C for 8-24 hours , to obtain a quaternized graphene oxide modifier; 2. Add the quaternized graphene oxide modifier to an organic solvent for ultrasonic dispersion to obtain a GO-Q suspension, and dissolve the polymer membrane matrix material and the membrane modifier into the GO-Q suspension to obtain a uniform casting solution and cast it into shape. The invention prepares the ultrafiltration membrane with dual functions of hydrophilicity and antibacterial through the immersion precipitation phase inversion method, and the modified ultrafiltration membrane shows better mechanical performance, water treatment performance, hydrophilicity and antibacterial performance.

Description

technical field [0001] The invention belongs to the technical field of ultrafiltration membranes, and in particular relates to a method for preparing an ultrafiltration membrane with hydrophilic and antibacterial functions and its application. Background technique [0002] Ultrafiltration technology has shown broad application prospects in sewage treatment and seawater desalination pretreatment. However, because microorganisms and bacteria in water are easy to attach and accumulate on the membrane surface or in the membrane pores, the biofouling caused by the subsequent biofilm will reduce the membrane flux, which greatly limits the practical application of ultrafiltration membrane separation technology. Applications. From the perspective of biofilm formation process, the modification of anti-microbial and bacterial adhesion of membrane materials will be a better way to solve the problem. [0003] After the membrane material is hydrophilically modified, a hydration layer c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/02C02F1/44C02F103/08
CPCB01D61/145B01D71/021B01D67/0002B01D69/02C02F1/444C02F2103/08B01D2325/36B01D2325/48Y02A20/131
Inventor 赵方波刘昊松王丽红蒋金婷耿成宝牛宏岩
Owner HARBIN ENG UNIV
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