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Preparation method and application of hydrophilic and antibacterial dual-modified ultrafiltration membrane

A dual modification and ultrafiltration membrane technology, applied in the field of ultrafiltration membranes, can solve the problems of simultaneous hydrophilicity, antibacterial dual modification, and loss of antibacterial agents, etc., and achieve the effect of increasing flux and improving hydrophilicity

Active Publication Date: 2019-12-13
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • 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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  • Preparation method and application of hydrophilic and antibacterial dual-modified ultrafiltration membrane
  • Preparation method and application of hydrophilic and antibacterial dual-modified ultrafiltration membrane
  • Preparation method and application of hydrophilic and antibacterial dual-modified ultrafiltration membrane

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specific Embodiment approach 1

[0023] Embodiment 1: The preparation method of the hydrophilic and antibacterial dual modified ultrafiltration membrane of the present embodiment is implemented according to the following steps:

[0024] 1. Preparation of quaternized graphene oxide (GO-Q) modifier: adding graphene oxide to an organic solvent for ultrasonic treatment to obtain a (homogeneous and stable) graphene oxide suspension, and adding graphene oxide to the graphene oxide suspension Add a condensing agent and 3-dimethylaminopropylamine to react, collect the reactants after the reaction, wash and dry the reactants and long-chain halogenated alkanes into an organic solvent, and fully react at 20 ~ 80 ℃ for 8 ~ 24h, After cleaning and drying, the quaternized graphene oxide modifier is obtained;

[0025] 2. Preparation of hydrophilic and antibacterial dual-modified ultrafiltration membrane: adding quaternized graphene oxide modifier into organic solvent and ultrasonically dispersing to obtain (homogeneous and ...

specific Embodiment approach 2

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the condensing agent described in step 1 is 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC ), N-hydroxysuccinimide (NHS), N-hydroxysuccinimide (SULFO-NHS), 4-dimethylaminopyridine (DMAP), N-hydroxybenzotriazole (HOBT), One or more mixtures of N,N-dicyclohexylcarbodiimide (DCC).

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the long-chain halogenated alkanes described in step 1 are one or more of chlorobutane, bromobutane, chloropentane and bromopentane. kind of mixture.

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Abstract

The invention discloses a preparation method and application of a hydrophilic and antibacterial dual-modified ultrafiltration membrane, belonging to the technical field of ultrafiltration membranes. The invention aims to solve the problem that conventional ultrafiltration membrane materials are difficult to realize hydrophilic and antibacterial dual modification at the same time. The preparation method comprises the following steps: adding a condensing agent and 3-dimethylaminopropylamine into a graphene oxide suspension for a reaction, adding a cleaned reactant and long-chain halogenated alkane into an organic solvent, and carrying out a sufficient reaction at 20-80 DEG C for 8-24 hours to obtain a quaternized graphene oxide modifier; and 2, adding the quaternized graphene oxide modifierinto an organic solvent, carrying out ultrasonic dispersion to obtain a GO-Q suspension, dissolving a polymeric membrane matrix material and a membrane modifier into the GO-Q suspension to obtain a uniform membrane casting solution, and carrying out casting molding. The ultrafiltration membrane with the double functions of hydrophilicity and antibacterial performance is prepared by an immersion precipitation phase inversion method; and the modified ultrafiltration membrane shows better mechanical properties, 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 preparation method and application of an ultrafiltration membrane with hydrophilic and antibacterial functions. Background technique [0002] Ultrafiltration technology has shown broad application prospects in sewage treatment and seawater desalination pretreatment. However, since microorganisms and bacteria in water are easily attached and accumulated on the membrane surface or in the membrane pores, the biofouling caused by the subsequent biofilm will lead to a decrease in membrane flux, which greatly limits the practical application of ultrafiltration membrane separation technology. Applications. From the perspective of the formation process of biofilms, the modification of membrane materials for antimicrobial and bacterial attachment will be a better way to solve the problem. [0003] After the membrane material is hydrophilically modified, a...

Claims

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Application Information

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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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