Polyethyleneimine functionalized inorganic particle/brominated polyphenylene ether hybrid ultrafiltration membrane and preparation method thereof

A technology of polyethyleneimine and brominated polyphenylene ether, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of weak force and limited improvement of membrane performance, and achieve low production cost , easy batch production, and excellent pollution recovery performance

Inactive Publication Date: 2016-03-30
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the weak interaction between polyethyleneimine-functionalized silver nanoparticles and the polymer matrix, there will be obvious release of silver nanoparticles during use.
At the same time, since the particles are only modified on the surface of the membrane, the improvement of membrane performance is limited.

Method used

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  • Polyethyleneimine functionalized inorganic particle/brominated polyphenylene ether hybrid ultrafiltration membrane and preparation method thereof
  • Polyethyleneimine functionalized inorganic particle/brominated polyphenylene ether hybrid ultrafiltration membrane and preparation method thereof
  • Polyethyleneimine functionalized inorganic particle/brominated polyphenylene ether hybrid ultrafiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, prepare polyethyleneimine functionalized graphene oxide, disperse 0.06 parts by weight of modified graphene oxide in 20% (w / w) BPPO / NMP solution (10 parts by weight of brominated polyphenylene ether are dispersed in 37 parts by weight of N-methyl-2-pyrrolidone), stirring, ultrasonication, standing and degassing, coating the casting solution on a clean glass plate, and then placing the glass plate horizontally at 30 o C in the coagulation bath (water bath) for 2 hours. Finally, wash the prepared membrane with a large amount of deionized water to remove the residual solvent in the membrane, and store it in water. The obtained membrane is a PEI-GO / BPPO hybrid ultrafiltration membrane.

[0019] Under the operating pressure of 0.2MPa, the PEI-GO / BPPO hybrid ultrafiltration membrane has a rejection rate of 91% for bovine serum albumin aqueous solution with a concentration of 0.5g / L and a pure water flux of 1065L m -2 h -1 .

[0020] With embodiment 1, the unmodified...

Embodiment 4-6

[0025] As in Example 1, different modified graphene oxide particles were prepared with branched polyethyleneimines with different weight average molecular weights (Mw=600, 1800 and 10000), respectively PEI(600)-GO, PEI(1800) -GO, PEI(10000)-GO, and then disperse 0.06 parts by mass of PEI-GO into 20% (w / w) BPPO / NMP (10 parts by weight of brominated polyphenylene ether dispersed in 37 parts by weight of N-methyl Base-2-pyrrolidone), stirring, ultrasonication, standing and defoaming, and finally phase inversion to obtain PEI-GO / BPPO hybrid ultrafiltration membranes containing polyethyleneimine modified graphene oxide with different molecular weights. They are PEI(600)-GO / BPPO, PEI(1800)-GO / BPPO, PEI(10000)-GO / BPPO hybrid ultrafiltration membranes.

[0026] These several examples are to investigate the influence of polyethyleneimine with different molecular weight on the performance of polyethyleneimine functionalized graphene oxide / brominated polyphenylene ether hybrid ultrafiltr...

Embodiment 7-11

[0030] With embodiment 1, the unmodified graphene oxide of 0~1 mass part is dispersed in 20% (w / w) BPPO / NMP solution (the brominated polyphenylene ether of 10 weight parts is dispersed in the N- Methyl-2-pyrrolidone), stirring, ultrasonication, standing and defoaming, and finally phase inversion to obtain PEI-GO / BPPO hybrid ultrafiltration membranes with different loadings of modified particles.

[0031] These several examples are to investigate the effect of different PEI-GO loadings on the performance of the prepared hybrid ultrafiltration membrane. The pure water flux under the pressure of 0.2MPa and the interception test results of BSA at pH=4.7 and 0.5mg / L are as follows:

[0032]

[0033] It can be seen from Examples 7-11 that the flux of 0.6% (w / w) PEI-GO / BPPO hybrid ultrafiltration membrane is the largest, which is 2 to 7 times that of other membranes, and the interception of protein is very small.

[0034]It can be seen that lower addition amount can realize the o...

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Abstract

The invention belongs to the field of membrane technology, and specifically relates to a polyethyleneimine functionalized inorganic particle / brominated polyphenylene ether hybrid ultrafiltration membrane and a preparation method thereof. The hybrid ultrafiltration membrane of the present invention is composed of inorganic particles and brominated polyphenylene ether matrix through polyethyleneimine covalent linkage to form a cross-linked network structure. The hybrid ultrafiltration membrane prepared by the present invention has high hydrophilicity, and the water flux is greatly improved compared with the unmodified ultrafiltration membrane, while still maintaining a high retention rate of protein; The integrity of the structure has good anti-chemical stability; the long-term anti-pollution test results show that the hybrid ultrafiltration membrane prepared by the invention has excellent pollution recovery performance. The method of the invention has simple operation process, mild preparation conditions, low production cost, easy batch and large-scale production, good industrial production basis and broad application prospect.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to a polyethyleneimine functionalized inorganic particle / brominated polyphenylene ether hybrid ultrafiltration membrane and a preparation method thereof. Background technique [0002] Membrane separation technology is a green technology with low cost and high efficiency, and has broad application prospects in sewage treatment, among which ultrafiltration membrane is the most commonly used. Ultrafiltration membranes with high flux and good selectivity can effectively reduce costs, improve separation efficiency, and save energy in the actual operation process, which is the goal that researchers have been pursuing. The method usually used to endow the ultrafiltration membrane with high water permeability is to increase the hydrophilicity of the membrane to create more water channels in the membrane. Moreover, the hydrophilic property can effectively inhibit the accumulat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/52B01D67/00
Inventor 杨丽佳汤蓓蓓武培怡
Owner FUDAN UNIV
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