Lecithin self-assembled cross-linked biomimetic modified polymer membrane material and preparation method thereof

A polymer membrane, lecithin technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation and other directions, can solve the problems of complex synthesis of phospholipid-like monomers, cumbersome modification process, unfavorable continuous production, etc. Excellent anti-protein adsorption performance, no environmental pollution, low cost effect

Active Publication Date: 2011-11-30
SUZHOU XINER ENVIRONMENTAL TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has disadvantages such as difficult and complex synthesis of phospholipid-like monomers, cumbersome modification process, long time-consuming and low efficiency, and unfavorable for industrial continuous production.

Method used

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  • Lecithin self-assembled cross-linked biomimetic modified polymer membrane material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] Egg yolk lecithin, 1,2-ethanedithiol and benzophenone were dissolved in ethanol, and the mass percentage concentrations of egg yolk lecithin, 1,2-ethanedithiol and benzophenone were prepared to be 0.1%, 0.05%, respectively. % and 0.001% mixed solution; the polypropylene film (film pore size is 0.1 ~ 0.9 μ m, film surface contact angle is 108.4 ± 1.3 °) is placed in the dielectric barrier discharge of the two discharge electrodes in the normal pressure dielectric barrier discharge plasma equipment Between the two discharge electrodes, adjust the distance between the two discharge electrodes to be 1.5 cm, helium gas is introduced during discharge, and the gas flow rate is 0.5 liters / minute; the discharge frequency is 10 kHz, the discharge power is 50 watts, and the processing time is 5 seconds; The treated polypropylene membrane was submerged in the lecithin-modified ethanol solution prepared above, and UV light was irradiated for 40 minutes at the same time. Take it out,...

Embodiment 2

[0028] Egg yolk lecithin, 1,2-ethanedithiol and benzophenone were dissolved in ethanol to prepare egg yolk lecithin, 1,2-ethanedithiol and benzophenone in mass percentage concentrations of 2.0%, 0.2%, respectively. % and 0.005% mixed solution; the polypropylene film (the film pore size is 0.1 ~ 0.9 μm, the contact angle of the film surface is 108.4 ± 1.3 °) is placed between the two discharge electrodes of the dielectric barrier discharge plasma equipment in the normal pressure dielectric barrier discharge Between the two discharge electrodes, the distance between the two discharge electrodes is adjusted to be 2 cm, helium gas is introduced during discharge, and the gas flow rate is 1 liter / min; the discharge frequency is 10 kHz, the discharge power is 80 watts, and the treatment time is 10 seconds; The polypropylene membrane was immersed in the lecithin-modified ethanol solution prepared above, and UV light was irradiated for 1 minute at the same time. Take it out, wash it wi...

Embodiment 3

[0030] Dissolve egg yolk lecithin, 1,4-butanedithiol and diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide in ethanol to prepare egg yolk lecithin, 1,4-butanedithiol The amount percentage concentration of alcohol and diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide substance is the mixed solution of 5.0%, 1% and 0.05% respectively; Polypropylene membrane (membrane aperture is 0.1~0.9 μm, the film surface contact angle is 108.4 ± 1.3 °) placed between the two discharge electrodes of the dielectric barrier discharge in the normal pressure dielectric barrier discharge plasma equipment, the distance between the two discharge electrodes is adjusted to be 3 cm, and helium gas is introduced during the discharge. The gas flow rate is 4 liters per minute; the discharge frequency is 10 kHz, the discharge power is 100 watts, and the treatment time is 20 seconds; the plasma-treated polypropylene film is immersed in the lecithin-modified ethanol solution prepared above, and simultaneously ...

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Abstract

The invention discloses a lecithin self-assembly cross-linking bionic modified polymer membrane material and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: dissolving natural lecithin, a cross-linking agent and a photoinitiator into ethanol to prepare a lecithin modified ethanol solution; carrying out constant-pressure medium barrierdischarge plasma processing on a polymer membrane material; soaking the polymer membrane material into the lecithin modified ethanol solution; and after carrying out ultraviolet light radiation for 1-40 minutes, washing with deionized water and drying at room temperature. In the invention, the self-assembly can be carried out on natural lecithin molecules containing unsaturated alkyl chains on the surface of a lyophobic polymer; and the cross-linking is carried out on the natural lecithin molecules containing the unsaturated alkyl chains by combining a sulfydryl-alkenyl click reaction, thereby forming a uniform, durable and stable lecithin bionic layer on the surface of a lyophobic polymer membrane material and endowing the lyophobic polymer membrane with excellent protein-absorption-resistant performance. According to the invention, the process is simple, the processing effect is good, the cost is low, no environmental pollution exists, and high efficiency and energy conservation areachieved.

Description

technical field [0001] The invention relates to a polymer membrane material and a preparation method thereof, in particular to a lecithin self-assembled cross-linked bionic modified polymer membrane material resistant to protein adsorption and a preparation method thereof. Background technique [0002] Polymer membrane materials have been widely used in industry, agriculture, medicine, environmental protection and other fields. At present, the commonly used membrane materials are mostly polymer materials such as polyethylene, polypropylene, polysulfone, polyethersulfone, polyvinylidene fluoride or polytetrafluoroethylene. These polymers have low surface energy and strong hydrophobicity; polymer membranes The application of materials, especially as biomedical materials in artificial organs (artificial liver, artificial kidney), separation and purification of biological products, and biocatalysis, has attracted more and more attention from people, and has become a hot spot for...

Claims

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Application Information

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IPC IPC(8): B01D71/26B01D71/68B01D71/42B01D71/34B01D71/36B01D67/00
Inventor 黄小军唐叶红
Owner SUZHOU XINER ENVIRONMENTAL TECH CO LTD
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