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Zn-Co-MOF/PVDF nanofiltration membrane, preparation method and application

A nanofiltration membrane and solution technology, applied in the field of membrane separation, can solve the problems of hydrophobic and oleophobic and difficult to process, and achieve the effect of ensuring the economy of production cost, not easy to stick and block, and good hydrophobic and oleophobic performance

Active Publication Date: 2021-04-06
CHANGZHOU VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current common MOF materials are mostly powder materials, and their hydrophobic and oleophobic properties make them difficult to process, thus limiting their applications.

Method used

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  • Zn-Co-MOF/PVDF nanofiltration membrane, preparation method and application
  • Zn-Co-MOF/PVDF nanofiltration membrane, preparation method and application
  • Zn-Co-MOF/PVDF nanofiltration membrane, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A Zn-Co-MOF / PVDF nanofiltration membrane, comprising the following weight components:

[0024]

[0025] The preferred technical solution is that the polyvinylidene fluoride (PVDF) is a linear polymer formed by homopolymerization or copolymerization of vinylidene fluoride monomers.

[0026] The preparation method of above-mentioned a kind of Zn-Co-MOF / PVDF nanofiltration membrane, comprises the steps:

[0027] S1: Weigh polyvinylidene fluoride (PVDF), N-vinylpyrrolidone (NVP), N,N-dimethylformamide (DMF) and acetone according to the above parts by weight, and mix N,N-di Methylformamide (DMF) is divided into two parts, polyvinylidene fluoride (PVDF), N-vinylpyrrolidone (NVP) is dissolved in one part of the mixture of N,N-dimethylformamide (DMF) and acetone solution, and at 60°C, magnetically stirred for 12 hours to form solution A;

[0028] S2: Zn(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O was dissolved in another part of N,N-dimethylformamide (DMF) to form a cle...

Embodiment 2

[0033] A Zn-Co-MOF / PVDF nanofiltration membrane, comprising the following weight components:

[0034]

[0035] The preferred technical solution is that the polyvinylidene fluoride (PVDF) is a linear polymer formed by homopolymerization or copolymerization of vinylidene fluoride monomers.

[0036] The preparation method of above-mentioned a kind of Zn-Co-MOF / PVDF nanofiltration membrane, comprises the steps:

[0037] S1: Weigh polyvinylidene fluoride (PVDF), N-vinylpyrrolidone (NVP), N,N-dimethylformamide (DMF) and acetone according to the above parts by weight, and mix N,N-di Methylformamide (DMF) is divided into two parts, polyvinylidene fluoride (PVDF), N-vinylpyrrolidone (NVP) is dissolved in one part of the mixture of N,N-dimethylformamide (DMF) and acetone solution, and under the condition of 65°C, magnetically stirred for 13h to form solution A;

[0038] S2: Zn(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O was dissolved in another part of N,N-dimethylformamide (DMF...

Embodiment 3

[0043] A Zn-Co-MOF / PVDF nanofiltration membrane, comprising the following weight components:

[0044]

[0045] The preferred technical solution is that the polyvinylidene fluoride (PVDF) is a linear polymer formed by homopolymerization or copolymerization of vinylidene fluoride monomers.

[0046] The preparation method of above-mentioned a kind of Zn-Co-MOF / PVDF nanofiltration membrane, comprises the steps:

[0047] S1: Weigh polyvinylidene fluoride (PVDF), N-vinylpyrrolidone (NVP), N,N-dimethylformamide (DMF) and acetone according to the above parts by weight, and mix N,N-di Methylformamide (DMF) is divided into two parts, polyvinylidene fluoride (PVDF), N-vinylpyrrolidone (NVP) is dissolved in one part of the mixture of N,N-dimethylformamide (DMF) and acetone solution, and at 70°C, magnetically stirred for 14h to form solution A;

[0048] S2: Zn(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O was dissolved in another part of N,N-dimethylformamide (DMF) to form solution B...

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Abstract

The invention discloses a Zn-Co-MOF / PVDF nanofiltration membrane as well as a preparation method and an application thereof. The Zn-Co-MOF / PVDF nanofiltration membrane is a novel nanofiltration membrane formed by combining polyvinylidene fluoride (PVDF) and a metal organic coordination compound (MOF). The nano-filtration membrane has the dual advantages of two materials: the nano-filtration membrane has good porosity, permeation flux Lp and rejection rate on MgCl2 and Na2SO4; the nanofiltration membrane also has good hydrophobic and oleophobic properties, so that membrane pores are not easy to adhere and block, and the service life of the nanofiltration membrane used as a separation membrane is prolonged; the preparation method of the Zn-Co-MOF / PVDF nanofiltration membrane is simple to operate and high in process controllability, and the high manufacturing efficiency of the Zn-Co-MOF / PVDF nanofiltration membrane and the economical efficiency of the production cost are effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a Zn-Co-MOF / PVDF nanofiltration membrane, a preparation method and an application. Background technique [0002] Nanofiltration membrane refers to a separation membrane with an average pore size of 0.5-2nm, which is a functional semi-permeable membrane that allows solvent molecules or some low-molecular-weight solutes or low-priced ions to pass through. Since the surface of most nanofiltration membranes is charged, it has a certain selective effect on the permeation of ions. Therefore, nanofiltration membranes are often used to separate small molecular organic compounds with molecular weights ranging from 200 to 1000. There is no phase change in the process of separating and passing through ions by nanofiltration membrane, and it operates at room temperature, with a high degree of automation and a small footprint. At present, the development of nanofiltration membran...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/02B01D67/00B01D61/08B01D61/02C02F1/44
CPCB01D71/34B01D69/02B01D67/0079B01D61/08B01D61/027C02F1/442Y02A20/131
Inventor 姚培李树白张启蒙刘媛郭泉颜康宋澳
Owner CHANGZHOU VOCATIONAL INST OF ENG
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