Modified graphene oxide/hyperbranched polymer composite film as well as preparation method and application thereof

A technology of hyperbranched polymer and oxide stone, applied in the field of membrane separation, can solve the problem of less membrane separation process, and achieve the effects of improving compatibility, improving film-forming efficiency, and simple and easy method.

Active Publication Date: 2018-02-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this material is rarely used in membrane separation processes that preferentially permeate organic matter, especially in the methyl tert-butyl ether / methanol system, which has not yet been reported.

Method used

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  • Modified graphene oxide/hyperbranched polymer composite film as well as preparation method and application thereof
  • Modified graphene oxide/hyperbranched polymer composite film as well as preparation method and application thereof
  • Modified graphene oxide/hyperbranched polymer composite film as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The specific method for the preparation of hyperbranched polymer modified graphene oxide composite membrane is as follows:

[0029] (1) Take 30 mg of graphene oxide powder, add 30 mL of deionized water, and ultrasonically obtain a 1 mg / mL graphene oxide dispersion that is stably dispersed for 4 hours, take 1 mL of the dispersion and add deionized water to dilute to 30 mL;

[0030] (2) Add 2.584g 1-(2-aminoethyl)piperazine to the dispersion prepared in step (1), and stir at 30°C for 24 hours;

[0031] (3) Add 3.083g of N,N-methylenebisacrylamide to the reaction system in step (2), and continue stirring at a constant temperature of 30°C for 48 hours to obtain hyperbranched polymer / hyperbranched polymer modified graphene oxide The mixed solution, diluted to 500mL, wherein the concentration of graphene oxide is 2mg / mL;

[0032] (4) Pretreatment of the inorganic tubular membrane: immerse the inorganic membrane in 0.8wt% 3-amino-triethoxysilane ethanol solution for 2 hours, ...

Embodiment 2

[0038] The specific method for the preparation of hyperbranched polymer modified graphene oxide composite membrane is as follows:

[0039] (1) Take 30 mg of graphene oxide powder, add 30 mL of deionized water, and ultrasonically obtain a 1 mg / mL graphene oxide dispersion that is stably dispersed for 4 hours, take 10 mL of the dispersion and add deionized water to dilute to 30 mL;

[0040] (2) Add 2.584g 1-(2-aminoethyl)piperazine to the dispersion prepared in step (1), and stir at 30°C for 24 hours;

[0041] (3) Add 3.083g of N,N-methylenebisacrylamide to the reaction system in step (2), and continue stirring at a constant temperature of 30°C for 48 hours to obtain hyperbranched polymer / hyperbranched polymer modified graphene oxide The mixed solution, diluted to 500mL, wherein the concentration of graphene oxide is 20mg / mL;

[0042](4) Pretreatment of the inorganic tubular membrane: immerse the inorganic membrane in 0.8wt% 3-amino-triethoxysilane ethanol solution for 2 hours,...

Embodiment 3

[0048] The specific method for the preparation of hyperbranched polymer modified graphene oxide composite membrane is as follows:

[0049] (1) Take 30 mg of graphene oxide powder, add 30 mL of deionized water, and ultrasonically obtain a 1 mg / mL graphene oxide dispersion that is stably dispersed for 4 hours, take 1 mL of the dispersion and add deionized water to dilute to 30 mL;

[0050] (2) Add 2.584g 1-(2-aminoethyl)piperazine to the dispersion prepared in step (1), and stir at 30°C for 24 hours;

[0051] (3) Add 3.083g of N,N-methylenebisacrylamide to the reaction system in step (2), and continue stirring at a constant temperature of 30°C for 60 hours to obtain hyperbranched polymer / hyperbranched polymer modified graphene oxide The mixed solution, diluted to 500mL, wherein the concentration of graphene oxide is 2mg / mL;

[0052] (4) Pretreatment of the inorganic tubular membrane: immerse the inorganic membrane in 0.8wt% 3-amino-triethoxysilane ethanol solution for 2 hours, ...

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Abstract

The invention relates to a modified graphene oxide / hyperbranched polymer composite film as well as a preparation method and application thereof, and belongs to the field of film separation. An in-situpolymerization technology is used for performing decoration modification on the graphene oxide; meanwhile, a graphene oxide and hyperbranched polymer composite material is obtained through the preparation; the composite material is used as film casting liquid to prepare the modified graphene oxide / hyperbranched polymer composite film on a tubular base film under the pressure driving condition. The composite material is used for directly forming the film; the step of purifying and re-dispersing the modified graphene material is omitted; the film forming efficiency is greatly improved. The prepared composite can be used for the separation of methyl tert-butyl ether / methyl alcohol in the pervaporation field; good separation performance and stability can be shown; the potential application prospects are realized.

Description

technical field [0001] The invention relates to a pervaporation membrane and its preparation technology, and provides a specific method for preparing a separation membrane from a modified graphene oxide / hyperbranched polymer composite material in an aqueous phase. The dense separation membrane prepared by the method can be used The invention relates to the pervaporation separation of methyl tert-butyl ether / methanol and belongs to the technical field of membrane separation. Background technique [0002] Methyl tert-butyl ether is an important chemical raw material, which can replace tetraethyl lead as an antiknock agent to increase the octane number of gasoline. It is generally prepared by catalytic etherification reaction using isobutylene and methanol as raw materials. When the unreacted methanol content is 14.3wt.%, it will form an azeotrope with methyl tert-butyl ether at 51.3°C. The traditional separation method is to use water washing-distillation process for separati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/10B01D61/36B01D71/02C01B32/198C07C27/26C07C29/76C07C31/04C07C41/34C07C43/04
CPCB01D61/362B01D67/0079B01D67/0088B01D67/0095B01D69/105B01D71/021C07C29/76C07C41/34C07C31/04C07C43/046
Inventor 纪树兰汪林王乃鑫安全福杨恒宇李倩
Owner BEIJING UNIV OF TECH
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