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MOF-199@PVDF matrix blend membrane having high pollution resistance, and production method thereof

A technology of MOF-199 and blended membranes, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve membrane fouling, shorten service life, affect membrane separation performance and other problems, achieve high rejection rate, small adsorption, Good anti-pollution effect

Inactive Publication Date: 2018-07-24
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the membrane is applied to the filtration and separation of the aqueous phase system, substances such as colloids and proteins in the aqueous phase are easily adsorbed or deposited on the surface of the membrane and in the pores of the membrane, causing membrane fouling and causing the membrane flux to decrease with the extension of the operating time. Decrease, which affects the separation performance of the membrane and shortens the service life of the membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0018] Specific embodiment 1: Add 5wt% (mass percentage relative to PVDF) MOF-199 additive into 74wt% dimethylformamide solvent, then ultrasonically disperse for 0.5 hours, and then add it in a vacuum drying oven under the condition of 85°C The 16wt% polyvinylidene fluoride dried for 10 hours was continuously stirred in a constant temperature water bath at 70°C, and the porogen was added after 1 hour to continue stirring for a total of 6 hours, and then left to stand for defoaming for 12 hours. Apply the casting solution evenly on a clean glass plate at room temperature, the thickness of the thread of the scraping rod is 200 μm, then immerse the glass plate in a 25°C water bath, peel the resulting film from the glass plate and immerse it in deionized water for 3 days To remove residual solvent and non-solvent additives. Its pure water flux reaches 84.73L / m 2 h, the bovine serum albumin retention rate reaches 95%. Backwashing the matrix blend membrane contaminated by bovine s...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment is different from Embodiment 1 in that: N-methyl-2-pyrrolidone is used as the solvent. Other steps and parameters are the same as in the first embodiment. The pure water flux of the prepared flat membrane reaches 78.33L / m 2 h, the bovine serum albumin retention rate reaches 97%. Backwashing the matrix blend membrane contaminated by bovine serum albumin, the recovery water flux reaches 48.63L / m -2 h.

specific Embodiment approach 3

[0020] Embodiment 3: This embodiment differs from Embodiment 1 in that the content of the additive MOF-199 is 3 wt%, and other steps and parameters are the same as Embodiment 1. The pure water flux of the prepared flat membrane reaches 82.42L / m 2 h, bovine serum albumin rejection rate reached 96%, backwashed the matrix blended membrane after bovine serum albumin contamination, and the recovery water flux reached 53.21L / m 2 h.

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Abstract

The invention relates to an MOF-199@PVDF matrix blend membrane having high pollution resistance, and a production method thereof. The matrix blend membrane is produced through a phase inversion technology of a membrane casting solution containing PVDF resin, a metal-organic framework material MOF-199 and a pore forming agent. The blend membrane has greatly improved pure water flux, has improved bovine serum albumin (BSA) rejection rate and pollution resistance, and can be applied to the field of membrane filtration.

Description

technical field [0001] The invention relates to a MOF-199@PVDF matrix blend membrane with high pollution resistance and a preparation method. The membrane is prepared by blending metal-organic framework material MOF-199 with PVDF as an additive. The membrane has high rejection rate and high pollution resistance, and is suitable for membrane filtration process. Background technique [0002] In the membrane separation process, the separation performance of the membrane mainly depends on the performance of the membrane material. The development of high-performance separation membrane materials is always the core and key of research in this field, which can effectively promote the development of membrane separation technology. In the field of liquid separation membrane technology, improving the hydrophilicity and antifouling properties of organic polymer membranes is one of the main purposes of membrane modification. When the membrane is applied to the filtration and separation...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/02B01D67/00
CPCB01D67/0011B01D69/02B01D71/34B01D2325/48
Inventor 王海涛奥德常娜师梦闪张浩吕美婵刘亚攀
Owner TIANJIN POLYTECHNIC UNIV
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