A preparation method of anti-fouling polysulfone/graphene oxide blended ultrafiltration membrane based on ATRP method

An ultrafiltration membrane and graphene technology, applied in the field of ultrafiltration membranes, can solve the problems of low adhesion and poor stability between GO and membranes, and achieve the effects of reducing membrane wrinkle defects, enhancing adhesion, and increasing flux

Active Publication Date: 2020-10-16
VONTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(Lee S H, daniel R D, AnJ, etal. Polymer brush via controlled, surface-initiated atom trandfer radicalpolymerization (ATRP) from grapheme oxide.[J].Macromol.Rapid Commun.2010,31:281-288.) Prepared by this method The low adhesion of GO to the membrane leads to poor stability of the membrane, and the hydrophilicity of the membrane can be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing an anti-pollution polysulfone / graphene oxide blended ultrafiltration membrane based on the ATRP method, comprising the steps of:

[0032] (1) GO-NH 2 Preparation of:

[0033] 1-1) Preparation: Add 5 g of GO to 400 mL of ethanol and sonicate for 25 minutes, heat the uniformly dispersed solution to 55 °C, add 8 mL of 3-aminopropyltriethoxysilane, and stir for 10 hours to obtain the preliminary product GO-NH 2 ;

[0034] 1-2) Purification: for the preliminary product GO-NH 2 Carry out centrifugation at 5000rpm, the precipitate is washed repeatedly with ethanol solution 4 times, and finally vacuum-dried for 10h to obtain ammoniated graphene oxide GO-NH 2 .

[0035] (2) Preparation of initiator GO-Br:

[0036]2-1) Preparation: Dissolve 5g of GO-Br prepared in step (1) and 1g of pyridine in 500mL of anhydrous toluene, cool to 0°C, then add 8mL of 2-bromoisobutyryl bromide three times, at 20 The initial product GO-Br was obtained by reacting at ℃ f...

Embodiment 2

[0043] A method for preparing an anti-pollution polysulfone / graphene oxide blended ultrafiltration membrane based on the ATRP method, comprising the steps of:

[0044] (1) GO-NH 2 Preparation of:

[0045] 1-1) Preparation: Add 5-15g of GO to 500mL of ethanol and sonicate for 30min, heat the uniformly dispersed solution to 60°C, add 10mL of 3-aminopropyltriethoxysilane, stir and react for 12h to obtain the preliminary product GO-NH 2 ;

[0046] 1-2) Purification: for the preliminary product GO-NH 2 Carry out centrifugation at 6000rpm, the precipitate is repeatedly washed with ethanol solution 5 times, and finally vacuum-dried for 12 hours to obtain ammoniated graphene oxide GO-NH 2 .

[0047] (2) Preparation of initiator GO-Br:

[0048] 2-1) Preparation: Dissolve 10g of GO-Br prepared in step (1) and 2g of pyridine in 600mL of anhydrous toluene, cool to 0°C, then add 10mL of 2-bromoisobutyryl bromide three times, at 25 The initial product GO-Br was obtained by reacting at...

Embodiment 3

[0055] A method for preparing an anti-pollution polysulfone / graphene oxide blended ultrafiltration membrane based on the ATRP method, comprising the steps of:

[0056] (1) GO-NH 2 Preparation of:

[0057] 1-1) Preparation: Add 15g of GO to 400-600mL of ethanol and sonicate for 35min, heat the uniformly dispersed solution to 65°C, add 12mL of 3-aminopropyltriethoxysilane, stir and react for 14h to obtain the preliminary product GO-NH 2 ;

[0058] 1-2) Purification: for the preliminary product GO-NH 2 Carry out centrifugation at 7000rpm, the precipitate is washed repeatedly with ethanol solution 6 times, and finally vacuum-dried for 15h to obtain ammoniated graphene oxide GO-NH 2 .

[0059] (2) Preparation of initiator GO-Br:

[0060] 2-1) Preparation: 15g of GO-Br prepared in step (1) and 4g of pyridine were dissolved in 700mL of anhydrous toluene, cooled to 0°C, and then 12mL of 2-bromoisobutyryl bromide was added three times, at 30 The initial product GO-Br was obtained...

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Abstract

The invention discloses a preparation method of an anti-pollution polysulfone / graphene oxide blended ultrafiltration membrane based on an ATRP (atom transfer radical polymerization method), which belongs to the technical field of ultrafiltration membranes. According to the method, graphene oxide after being grafted and modified is blended in a polysulfone solution, and the ultrafiltration membraneis prepared by virtue of NIPS. The method comprises the following steps: enabling 3-amino propyl triethoxysilane and graphene oxide to have a coupling reaction to obtain amino-containing graphene oxide (GO-NH2); performing acylation-bromination reaction for 2-bromo isobutyryl bromide and GO-NH2 under the catalysis of pyridine, and generating an initiator GO-Br; performing ATRP for the initiator and monomer HEMA as well as a complex in the presence of a catalyst, and obtaining GO-g-PHEMA of different ratios by controlling the polymerization time; and finally adding the synthesized Go-g-PHEMA in a polysulfone casting solution to be blended and modified, and forming a membrane by virtue of an NIPS method. By adopting the method, the pollution-resistant composite ultrafiltration membrane withhigh flux and stable performance can be prepared, and the application prospect is good.

Description

technical field [0001] The invention relates to the technical field of ultrafiltration membranes, in particular to a method for preparing an anti-pollution polysulfone / graphene oxide blended ultrafiltration membrane based on an ATRP method. Background technique [0002] Ultrafiltration membrane is a microporous filtration membrane between nanofiltration membrane and microfiltration membrane. The pore size range is 1-100nm. The main separation objects are suspended small particles and macromolecular substances. It is widely used in drinking water purification, fruit juice Beverage and biomedicine fields. Under the action of static pressure difference, the ultrafiltration membrane uses the "screening" effect of the membrane to intercept the solute larger than the pore size, while the solvent and some macromolecules smaller than the pore size permeate through the membrane surface. Polysulfone flat membrane is widely used because of its excellent comprehensive performance, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D71/02B01D69/12B01D69/02B01D67/00B01D61/14
CPCB01D61/145B01D67/0079B01D69/02B01D69/12B01D71/021B01D71/68B01D2325/36
Inventor 彭义波杨兴胜赵志宁梁松苗
Owner VONTRON TECH CO LTD
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