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A kind of preparation method of ordered vertical pore double-pass membrane and product thereof

A vertical channel, double-pass membrane technology, applied in the field of nanoporous membranes, can solve problems such as affecting the separation function of mesoporous molecules, and achieve the effects of ultra-thin thickness, uniform pore size distribution, and high porosity

Active Publication Date: 2017-06-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, these thin films are supported on the surface of solid solids whose substrates would block mesoporous SiO 2 One end of the membrane is severely affected by the mesoporous SiO 2 Molecular Separation Function of Membranes

Method used

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  • A kind of preparation method of ordered vertical pore double-pass membrane and product thereof
  • A kind of preparation method of ordered vertical pore double-pass membrane and product thereof
  • A kind of preparation method of ordered vertical pore double-pass membrane and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Using the ITO electrode as the substrate I, the mesoporous SiO with vertical channels was prepared on it 2 Membrane: Substrate I was put into a mixed solution I consisting of 0.16 g CTAB, 80 μL TEOS, 70 mL water, 30 mL ethanol and 10 μL ammonia water with a concentration of 25% by mass and allowed to grow for 12 hours.

[0044] (2) Prepare 5% PMMA solution with phenylethanol as solvent, spin-coat PMMA solution on this mesoporous SiO with the speed of 3000rpm 2 on the membrane; dry at room temperature for 1h, and dry at 115°C for 15min; obtain PMMA / mesoporous SiO supported on substrate I 2 membrane.

[0045] (3) Using 2M hydrochloric acid as the etching solution, the PMMA / mesoporous SiO loaded on the substrate I 2 The film was etched in etching solution for 12h. At this point PMMA / mesoporous SiO 2 The membrane will separate from the substrate I.

[0046] (4) PMMA / mesoporous SiO 2 The membrane was taken out from the etching solution, rinsed in water for 10 min, ...

Embodiment 2

[0054] (1) Using the ITO electrode as the substrate I, the mesoporous SiO with vertical channels was prepared on it 2 Membrane: Prepare a solution consisting of 1.585gCTAB, 3.0314g TEOS, 20mL water, 20mL ethanol, 0.17g sodium nitrate and 1.67μL 12M hydrochloric acid, stir at room temperature for 2.5h to obtain a uniform mixed solution II; put the substrate I into the mixed solution II Among them, it is used as the working electrode, Ag / AgCl / KCl is used as the reference electrode, and the platinum sheet is used as the counter electrode. Apply a density of -0.3mAcm on substrate I -2 Constant current 16s, wash.

[0055] (2) Prepare 5% PMMA solution with phenylethanol as solvent, spin-coat PMMA solution on this mesoporous SiO with the speed of 3000rpm 2 on the membrane; dry at room temperature for 1h, and dry at 115°C for 15min; obtain PMMA / mesoporous SiO supported on substrate I 2 membrane.

[0056] (3) Using 2M hydrochloric acid as the etching solution, the PMMA / mesoporous S...

Embodiment 3

[0060] (1) Using the ITO electrode as the substrate I, the mesoporous SiO with vertical channels was prepared on it 2 Membrane: Substrate I was put into a mixed solution I consisting of 0.16 g CTAB, 80 μL TEOS, 70 mL water, 30 mL ethanol and 10 μL ammonia water with a concentration of 25% by mass and allowed to grow for 12 hours.

[0061] (2) Prepare 5% PMMA solution with phenylethanol as solvent, spin-coat PMMA solution on this mesoporous SiO with the speed of 3000rpm 2 on the membrane; dry at room temperature for 1h, and dry at 115°C for 15min; obtain PMMA / mesoporous SiO supported on substrate I 2 membrane.

[0062] (3) Using 2M hydrochloric acid as the etching solution, the PMMA / mesoporous SiO loaded on the substrate I 2 The film was etched in etching solution for 12h. At this point PMMA / mesoporous SiO 2 The membrane will separate from the substrate I.

[0063] (4) PMMA / mesoporous SiO 2 The membrane was taken out from the etching solution, rinsed in water for 10 min, ...

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Abstract

The invention discloses an ordered vertical channel double-pass film preparation method and a product thereof. The preparation method comprises steps: a mesoporous SiO2 film with a vertical channel is prepared on a substrate I; spin coating of a PMMA (polymethyl methacrylate) solution on the mesoporous SiO2 film is carried out, drying is carried out, a PMMA / mesoporous SiO2 film loaded on the substrate I is obtained, and the film is put in an etching solution for etching; the film is washed, transferred to a substrate II, dried and soaked in a soaking solution, and thus the ordered vertical channel double-pass film is obtained. According to the ordered vertical channel double-pass film prepared by the invention, the PMMA is used for transferring the mesoporous SiO2 film from the solid substrate to the porous substrate, the mesoporous SiO2 film is supported, clearness of two ends of the mesoporous SiO2 film is kept, and precise molecular separation can be realized.

Description

technical field [0001] The invention relates to the field of nanoporous membranes, in particular to a method for preparing a double-pass membrane with ordered vertical channels and a product thereof. Background technique [0002] Mesoporous SiO 2 It is a porous body with cylindrical pores densely packed on six sides, with an average pore diameter of 2-10nm. It has very broad prospects in the fields of catalysis, adsorption, separation, photoelectricity and slow release, and is orderly The channel arrangement makes it possible for its application in devices, especially mesoporous SiO with ordered vertical channels 2 The application of thin film materials has aroused great concern in the industry. Mesoporous SiO 2 Thin film materials have very broad application prospects in the fields of catalyst supports, molecular level chemical sensors, optical materials, polymer templates and template manufacturing of precious metal wires. [0003] Currently, the preparation of mesopor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B3/00B82B1/00B82Y40/00
Inventor 苏彬林星宇杨倩
Owner ZHEJIANG UNIV