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A kind of pollution-resistant polyvinylidene fluoride hollow fiber membrane and its preparation method

A technology of polyvinylidene fluoride and fiber membrane, which is applied in the field of new high-pollution-resistant polyvinylidene fluoride hollow fiber membrane and its preparation, can solve the problems of less research on amphoteric ions, and achieve effective retention rate and stable flux , Strong anti-protein adsorption effect

Active Publication Date: 2019-02-01
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the more researched zwitterions include sulfobetaines, carboxybetaines, phosphorylcholines, etc., but less research on amino acid zwitterions

Method used

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  • A kind of pollution-resistant polyvinylidene fluoride hollow fiber membrane and its preparation method
  • A kind of pollution-resistant polyvinylidene fluoride hollow fiber membrane and its preparation method
  • A kind of pollution-resistant polyvinylidene fluoride hollow fiber membrane and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0055] An anti-pollution polyvinylidene fluoride hollow fiber membrane is a polyvinylidene fluoride hollow fiber membrane with amphoteric ionization of amino acids. The preparation method of the anti-pollution polyvinylidene fluoride hollow fiber membrane is:

[0056] The first step: introducing active sites: immerse the polyvinylidene fluoride hollow fiber membrane in a 1.8mol / L lithium hydroxide aqueous solution, perform the first ultrasonic oscillation at 100% rated power for 1min, stir and react at 80°C for 24h, and then Wash with water, dry, then immerse in 0.078mol / L sodium borohydride solution (solvent is isopropanol), carry out the second ultrasonic oscillation at 100% rated power for 20min, stir at room temperature for 24h, wash with water, dry, add diiso In butyl aluminum hydride, ultrasonically treat for 20 minutes at 100% rated power, react at room temperature for 65 hours, wash and dry with water to obtain a hollow fiber membrane (PVDF-OH) with surface hydroxylati...

Embodiment 2

[0063] An anti-pollution polyvinylidene fluoride hollow fiber membrane is a polyvinylidene fluoride hollow fiber membrane with amphoteric ionization of amino acids. The preparation method of the anti-pollution polyvinylidene fluoride hollow fiber membrane is:

[0064] The first step: introducing active sites: immerse the polyvinylidene fluoride hollow fiber membrane in a 1.8mol / L lithium hydroxide aqueous solution, perform the first ultrasonic oscillation at 100% rated power for 10 minutes, stir and react at 80°C for 1 hour, and then Wash with water, dry, then immerse in 0.078mol / L sodium borohydride solution (solvent is isopropanol), carry out ultrasonic oscillation for 20min for the second time at 100% rated power, stir at room temperature for 24h, wash with water, dry, add diiso In butyl aluminum hydride, ultrasonically treat for 20 minutes at 100% rated power, react at room temperature for 65 hours, wash and dry with water to obtain a hollow fiber membrane (PVDF-OH) with s...

Embodiment 3

[0069] An anti-pollution polyvinylidene fluoride hollow fiber membrane is a polyvinylidene fluoride hollow fiber membrane with amphoteric ionization of amino acids. The preparation method of the anti-pollution polyvinylidene fluoride hollow fiber membrane is:

[0070] The first step: introducing active sites: immerse the polyvinylidene fluoride hollow fiber membrane in a 1.8mol / L lithium hydroxide aqueous solution, perform the first ultrasonic oscillation for 5 minutes at 100% rated power, stir and react at 80°C for 6 hours, and then Wash with water, dry, then immerse in 0.078mol / L sodium borohydride solution (solvent is isopropanol), carry out ultrasonic oscillation for 20min for the second time at 100% rated power, stir at room temperature for 1h, wash with water, dry, add diiso In butyl aluminum hydride, ultrasonically treat for 20 minutes at 100% rated power, react at room temperature for 65 hours, wash and dry with water to obtain a hollow fiber membrane (PVDF-OH) with su...

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Abstract

The invention provides an anti-pollution polyvinylidene fluoride hollow-fiber membrane and a preparation method thereof. The anti-pollution polyvinylidene fluoride hollow-fiber membrane is characterized by being a polyvinylidene fluoride hollow-fiber membrane subjected to amphoteric ionization of amino acid. The preparation method comprises the steps that 1, the surface of a PVDF hollow-fiber membrane is treated by adopting sodium borohydride and other chemical agents, and an active site is introduced; 2, 2-bromine isobutyryl bromine is utilized to fix an initiator to the surface of the membrane; 3, amino acid methacrylamide or amino acid methacrylate is grafted to the surface of the membrane by adopting an SI-ATRP method. The surface-initiated atom transfer radical polymerization (SI-ATRP) method is utilized to graft zwitter-ions of the amino acid to the surface of the PVDF hollow-fiber membrane, and the high-hydrophilicity and high-pollution-resistance hollow-fiber membrane is prepared.

Description

technical field [0001] The invention relates to a novel highly anti-pollution polyvinylidene fluoride hollow fiber membrane and a preparation method thereof, in particular to a high anti-pollution hollow fiber membrane adopting surface-grafted polyamino acid zwitterions and a preparation method thereof. Background technique [0002] Membrane separation technology has been widely used due to its advantages of high separation efficiency, low energy consumption, small footprint, simple process, convenient operation, and no secondary pollution. As a polymer polymer, polyvinylidene fluoride (PVDF) has excellent mechanical properties and stable heat resistance and chemical properties, and has been widely used in various membrane separation fields, such as industrial wastewater treatment, water purification, protein separation , blood purification, etc. (Journal of Membrane Science, 2011, 375, 1-27). However, due to its own hydrophobicity, the surface of PVDF membrane is easily co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/78B01D71/34B01D69/08B01D69/02B01D67/00
CPCB01D67/0006B01D69/02B01D69/08B01D71/34B01D71/78B01D2323/36B01D2323/38B01D2325/14B01D2325/16B01D2325/36
Inventor 何春菊刘大朋王建秀
Owner DONGHUA UNIV