Polystyrene microsphere/carbon nanotube co-modified hybrid polyether sulfone nanofiltration membrane as well as preparation method and application thereof

A composite technology of polystyrene microspheres and carbon nanotubes is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., and can solve the problems of easy pollution, high preparation cost, and low flux of nanofiltration membranes.

Active Publication Date: 2019-10-18
浙江海印数码科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problems that the nanofiltration membrane used in the existing dye desalting technology has low flux, is easily polluted, and has high preparation costs, and provides a polystyrene microsphere / carbon nanotube composite modified hybrid Polyethersulfone nanofiltration membrane and its preparation method and application. The polystyrene microsphere / carbon nanotube composite modified hybrid polyethersulfone nanofiltration membrane provided by the invention has higher flux, good hydrophilicity, and Excellent pollution performance and good mechanical properties

Method used

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  • Polystyrene microsphere/carbon nanotube co-modified hybrid polyether sulfone nanofiltration membrane as well as preparation method and application thereof
  • Polystyrene microsphere/carbon nanotube co-modified hybrid polyether sulfone nanofiltration membrane as well as preparation method and application thereof
  • Polystyrene microsphere/carbon nanotube co-modified hybrid polyether sulfone nanofiltration membrane as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Dissolve 1ml of tetraethoxysilane in absolute ethanol, add 1ml of deionized water, stir and hydrolyze for 20min, then slowly add 5ml of 10wt% ammonia solution dropwise, and stir for 30min to obtain silica sol, and let it stand at room temperature Aging treatment for 10 hours to obtain silica gel, the gel powder obtained after drying the silica gel was calcined in a muffle furnace at 200-300°C for 20 minutes to obtain nano-silica;

[0031] (2) Chitosan is dissolved in the acetic acid solution that mass concentration is 3%, makes mixed solution; Nano silicon dioxide, silane coupling agent and water are mixed and stirred to make nano silicon dioxide dispersion liquid, mixed solution Mix with silica dispersion, then add 13wt% glutaraldehyde aqueous solution, stir and react at 40-50°C for 30min, cool to room temperature, filter, wash the filter residue with deionized water and dry at 80°C for 3h to prepare Get chitosan cross-linked coated silica powder; wherein, the mass...

Embodiment 2

[0035] (1) Dissolve 1ml of tetraethoxysilane in absolute ethanol, add 1ml of deionized water, stir and hydrolyze for 60min, then slowly add 5ml of 10wt% ammonia solution dropwise, and stir for 30min to obtain silica sol, and let it stand at room temperature Aging treatment for 20 hours to obtain silica gel, and the gel powder obtained after drying the silica gel was calcined in a muffle furnace at 200-300°C for 40 minutes to obtain nano-silica;

[0036] (2) Chitosan is dissolved in the acetic acid solution that mass concentration is 3%, makes mixed solution; Nano silicon dioxide, silane coupling agent and water are mixed and stirred to make nano silicon dioxide dispersion liquid, mixed solution Mix with silica dispersion, then add 13wt% glutaraldehyde aqueous solution, stir and react at 40-50°C for 90min, cool to room temperature, filter, wash the filter residue with deionized water and dry at 80°C for 3h to prepare To obtain chitosan cross-linked coated silica powder; wherein...

Embodiment 3

[0040] (1) Dissolve 1ml of tetraethoxysilane in absolute ethanol, add 1ml of deionized water, stir and hydrolyze for 30min, then slowly add 5ml of 10wt% ammonia solution dropwise, stir for 30min to obtain silica sol, and let stand at room temperature Aging treatment for 12 hours to obtain silica gel, the gel powder obtained after drying the silica gel was calcined in a muffle furnace at 200-300°C for 20-40 minutes to obtain nano-silica;

[0041] (2) Chitosan is dissolved in the acetic acid solution that mass concentration is 3%, makes mixed solution; Nano silicon dioxide, silane coupling agent and water are mixed and stirred to make nano silicon dioxide dispersion liquid, mixed solution Mix with silica dispersion, then add 13wt% glutaraldehyde aqueous solution, stir and react at 40-50°C for 40min, cool to room temperature, filter, wash the filter residue with deionized water and dry at 80°C for 3h to prepare To obtain chitosan cross-linked coated silica powder; wherein, the ma...

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Abstract

The invention provides a polystyrene microsphere/carbon nanotube co-modified hybrid polyether sulfone nanofiltration membrane. The nanofiltration membrane uses polyether sulfone as a substrate membrane, the substrate membrane is doped with nano silicon oxide, the surface of the nano silicon oxide is coated with chitosan, carbon nanotubes are deposited at the surface of the substrate membrane, wherein the thickness of the carbon nanotubes is 80-100 nm, the surfaces of the carbon nanotubes are coated with polydopamine, and polystyrene microspheres are deposited between the polydopamine and the carbon nanotubes. The hybrid polyether sulfone nanofiltration membrane prepared by the invention can be used for salt removing treatment in the preparation process of dye and effectively improve purityof the dye; and the nanofiltration membrane has good mechanical properties and strong anti-pollution ability.

Description

Technical field: [0001] The invention relates to the field of dye preparation, in particular to a polystyrene microsphere / carbon nanotube composite modified hybrid polyethersulfone nanofiltration membrane and its preparation method and application. Background technique: [0002] The high-purity dyes used by domestic digital inkjet printing ink manufacturers are mainly imported from abroad, and the price is relatively high. Purifying domestic commodity dyes to prepare high-purity dyes for digital inkjet printing to replace imported products is important for promoting domestic digital inkjet printing. The development of the industry is of great significance. For the dye synthesis technology in the prior art, low-molecular-weight intermediate products, residual compounds, and electrolytes will be produced. The existence of these impurities will seriously affect the stability, purity and quality of the dye. Moreover, the traditional salting-out method will not only produce a la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D61/02C08F112/08C08F2/44C08K7/24
CPCB01D61/027B01D67/0079B01D71/68C08F2/44C08F112/08C08K2201/011C08K3/041Y02A20/131
Inventor 宋水友宋丽娜
Owner 浙江海印数码科技有限公司
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