A kind of bionic permeable membrane and preparation method thereof

A water-permeable membrane, aquaporin technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology and other directions, to achieve the effect of simple and easy operation and stable properties.

Active Publication Date: 2020-05-26
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the adsorption of aquaporins on metal nanofibers through electrostatic interaction, and then through suction filtration to the porous support layer to prepare biomimetic water-permeable membranes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Disperse 0.3 mg of aquaporin Z in 10 ml of 0.2 M / L calcium hydroxide nanofiber aqueous solution, and through ultrasonication and vibration, the aquaporin Z is evenly adsorbed to the surface of the nanofiber.

[0030] 2) Immerse the polysulfone membrane prepared by the phase inversion method into the dopamine Tris-HCl buffer solution with a concentration of 2 mg / ml, and react for 2 hours at room temperature with a constant temperature oscillator, and the pH value of the solution is 8.5 to obtain a porous dopamine-modified polysulfone membrane. support layer. After the reaction, the surface of the membrane was washed with ethanol and water, respectively.

[0031] 3) Suction filtration of the solution containing aquaporin onto the surface of the dopamine-modified polysulfone porous support layer, and further cross-linking with 10% glutaraldehyde aqueous solution for 1 h.

[0032] 4) Soak the obtained product in step 3) in 10 mM HCl for 1 h to remove the calcium hydroxi...

Embodiment 2

[0035] 1) Prepare 2mM cadmium nitrate aqueous solution, stir and quickly add 0.8mM NaOH aqueous solution until white precipitation of cadmium hydroxide appears in the system. After centrifugation and washing with water, the above-mentioned white precipitate is redispersed in deionized water to obtain an aqueous solution of cadmium hydroxide nanofibers.

[0036] 2) Disperse 0.5 mg of aquaporin 1 in 50 ml of 0.2 M / L cadmium hydroxide nanofiber aqueous solution, and through ultrasonication and vibration, aquaporin is evenly adsorbed to the surface of the cadmium hydroxide nanofiber.

[0037] 3) Suction filter the solution containing aquaporin onto the surface of the polycarbonate porous support layer, further cross-link with a 10% glutaraldehyde aqueous solution for 1 h, and then soak in 10 mM HCl for 1 h to remove the copper hydroxide nanofibers to obtain water-containing channels Biomimetic water-permeable membrane of protein 1.

[0038] To measure the performance of the biomi...

Embodiment 3

[0040] 1) Disperse 0.3 mg of aquaporin 4 in 50 ml of 0.2 M / L copper hydroxide nanofiber aqueous solution, and through ultrasonication and vibration, the aquaporin is evenly adsorbed to the surface of the nanofiber.

[0041] 2) Suction filter the solution containing aquaporin onto the surface of the alumina porous support layer, further cross-link with a 10% glutaraldehyde aqueous solution for 1 h, and then soak in 10 mM HCl for 1 h to remove the calcium hydroxide nanofibers to obtain the aquaporin 4 bionic permeable membrane.

[0042] Forward osmosis method was used to measure the performance of the water-permeable membrane. The supply liquid was deionized water, and the drawing liquid was 1M / L NaCl solution. The bionic water-permeable membrane containing aquaporin 4 in the above-mentioned embodiment was used for separation, and the water flux was 350Lm -2 h -1 , with a salt flux of 30gm -2 h -1 .

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Abstract

The invention relates to the technical field of environmental protection and particularly relates to a bionic water-permeable film and a preparation method thereof. The bionic water-permeable film comprises a water channel protein function layer and a porous support layer, wherein the water channel protein function layer is prepared by pumping and filtering metal nano-fibers adsorbed with water channel proteins to the surface of the porous support layer. The preparation method is simple, easy to operate and suitable for large-area popularization for the preparation of water channel protein bionic films; and a prepared film material has stable properties and belongs to a multi-purpose environment-friendly material.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a bionic water-permeable membrane and a preparation method thereof. Background technique [0002] The extreme scarcity of fresh water resources, the rapid expansion of the energy gap and the increasingly serious environmental pollution are the important bottlenecks restricting the healthy and sustainable development of human civilization today. How to use membrane materials to obtain water resources with low pollution, low energy consumption and high efficiency is a frontier problem that scientists around the world are currently working hard to solve. [0003] The forward osmosis membrane technology (Forward Osmosis, FO), which relies on the osmotic pressure of the solution itself as the driving force, provides a new way for people to solve this problem. FO drives the unidirectional movement of water molecules through the osmotic pressure difference of the solut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/00B01D67/00B01D69/10B01D69/12B01D71/68B01D71/74B01D71/02
Inventor 吕剑蔡颖武君
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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