A layered inorganic-material organic solvent nanofiltration composite membrane and a preparing method thereof

An organic solvent and inorganic material technology, applied in the field of layered inorganic material organic solvent nanofiltration composite membrane and its preparation, can solve the problems of large distance, hinder smooth molecular penetration, difficult molecular sieving effect, etc., achieve high solvent permeability, The effect of precise solute retention, good operational stability

Active Publication Date: 2018-12-14
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although graphene oxide, which is the most widely studied at present, has good film-forming properties, its flexible sheet material causes disorder in the inter-sheet channels, which hinders the smooth penetration of molecules, and the channel spacing varies relatively slowly with humidity. Large, difficult to achieve precise molecular sieving effect

Method used

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  • A layered inorganic-material organic solvent nanofiltration composite membrane and a preparing method thereof
  • A layered inorganic-material organic solvent nanofiltration composite membrane and a preparing method thereof
  • A layered inorganic-material organic solvent nanofiltration composite membrane and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of single-walled carbon nanotube aqueous solution: Slowly add single-walled carbon nanotubes (0.01 g) into 120 ml of concentrated sulfuric acid, sonicate in an ultrasonic cleaner for 60 h, take it out and dilute with a large amount of deionized water, and wash with suction and water to nearly neutral, and then dispersed in deionized water at a concentration of 0.001 g / L.

[0031] Use a suction filtration device to vacuum filter 60ml of single-walled carbon nanotube aqueous solution on polydopamine-coated organic microfiltration membrane, control the circulating water pump to carry out the suction filtration pressure not higher than 0.2 bar, and obtain the single-walled carbon nanotube membrane The thickness is 50-80nm.

[0032] The above membranes were tested:

[0033] Solvent flux test results, the flux to acetonitrile is 8179.9 L / m 2 h bar, flux to acetone is 8024.7 L / m 2 h bar, flux to methanol is 5119.4 L / m 2 h bar, the flux to water is 2589.3 L / m...

Embodiment 2

[0038] Ti 3 C 2 T x Preparation of the dispersion: 7.1321 g of titanium hydride, 17.3623 g of titanium carbide, and 4.6916 g of aluminum powder were milled in a ball mill jar for 4 h to make them evenly mixed, and calcined at 1450 °C for 2 h in an argon atmosphere to obtain block Ti 3 AlC 2 . block Ti 3 AlC 2 Milled in a ball mill for 2 h to obtain powdered Ti 3 AlC 2 . Powdered Ti 3 AlC 2 Sieve, mix with hydrofluoric acid according to the ratio of 1g: 16 ml, stir in an oil bath at 60 °C for 72 h, then wash with water, and dry to obtain the etched Ti with three-dimensional structure 3 C 2 T x . Ti 3 C 2 T x and dimethyl sulfoxide according to the ratio of 1 g: 20 ml, stirred at room temperature for 48 h, washed with deionized water after standing, ultrasonicated for 30 min, and centrifuged to obtain the supernatant to obtain the stripped Ti 3 C 2 T x Dispersions.

[0039] The organic microfiltration membrane coated with polydopamine is used as the base memb...

Embodiment 3

[0045] Preparation of single-walled carbon nanotube aqueous solution, Ti 3 C 2 T x The preparation of dispersion liquid is all with embodiment 1.

[0046] Use a suction filtration device to vacuum filter 60ml of single-walled carbon nanotube aqueous solution on polydopamine-coated organic microfiltration membrane, and obtain a single-walled carbon nanotube film with a thickness of 50-80 nm. Continue to vacuum filter Ti 3 C 2 T x dispersion, so that Ti 3 C 2 T x Self-stacking on the surface of the single-wall carbon nanotube film, and finally preparing a multilayer composite film with a thickness of 0.8-1 μm. The multilayer composite film is named CNTs / Ti 3 C 2 T x Composite film. For the above suction filtration, the suction filtration pressure of the circulating water pump is controlled not to be higher than 0.2bar, the same below.

[0047] For CNTs / Ti 3 C 2 T x Composite membranes were tested:

[0048] Solvent flux test results, the flux to acetonitrile is 3...

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Abstract

The invention belongs to the technical field of organic solvent nanofiltration membrane separation, and particularly relates to a regular layered inorganic-material solvent-resistant nanofiltration composite membrane and a preparing method thereof. The composite membrane is a composite membrane prepared through vacuum filtration. The composite membrane shows higher nanofiltration performance thansolvent-resistant nanofiltration membranes prepared by traditional methods.

Description

technical field [0001] The invention belongs to the technical field of organic solvent nanofiltration membrane separation, in particular to a layered inorganic material organic solvent nanofiltration composite membrane and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's industry, the demand for organic solvents has increased dramatically, and most of the organic solvents are harmful to human health, so the waste recycling and discharge of organic solvents has become an urgent problem to be solved. Due to the advantages of high efficiency, energy saving, environmental protection, and low cost, membrane separation technology is gradually being used to replace other traditional processes in the purification and recovery of organic solvents. Organic solvent nanofiltration is driven by pressure, and the differential transfer of solvent and solute molecules in the nanofiltration membrane realizes the separatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12
CPCB01D67/0079B01D69/12
Inventor 王景涛郭宏晓吴晓莉陈佳乐崔旭林周岩
Owner ZHENGZHOU UNIV
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