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Nanofiber membrane for chromatography and preparation process thereof

A nanofiber membrane and preparation technology, which is applied in the field of nanofiber membrane and its preparation technology for chromatography, can solve problems such as difficult handling, membrane deformation, and insufficient mechanical strength of the membrane, and achieve the effect of improving the surface strength of the membrane

Active Publication Date: 2021-07-09
HANGZHOU COBETTER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of nanofibrous membrane often has insufficient mechanical strength because the fibers are too thin, so it needs to be heated and pressed to stabilize the structure before functional modification
In the research, we also found that when the nanofiber membrane using this kind of fine fiber is soaked in the material solution, it is often not enough to support the volume attached to the membrane fiber because of its own strength, so the membrane is prone to deformation and is not easy to further deal with

Method used

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  • Nanofiber membrane for chromatography and preparation process thereof
  • Nanofiber membrane for chromatography and preparation process thereof
  • Nanofiber membrane for chromatography and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A nano-PES fiber membrane used for chromatography, where the original membrane material of the nano-fiber membrane is selected as PES material. In other embodiments, the original film can be acetate fiber material, polyester fiber material, etc., but the selected raw materials are different, and they are all similar in terms of fiber structure. The structure of this nano-PES fiber membrane is observed through an electron microscope, and it is found that the membrane is composed of a number of nanometer-scale fine PES fibers intertwined randomly and disorderly. However, we have limited the thickness and diameter of these nanometer-level fibers, and these nanofibers are roughly divided into two groups, one group is thick fibers, and the other group is thin fibers. The diameter of the thick fiber is greater than 1100 nanometers, and the diameter of the thin fiber is less than 1000 nanometers. In the production process of the PES fiber original film, the diameter of the th...

Embodiment 2

[0048] A nanometer cellulose acetate membrane used for chromatography, where the original membrane material of the nanofiber membrane is selected as cellulose acetate. The structure of this nano-cellulose acetate film is observed through an electron microscope, and it is found that the film is composed of a number of nano-scale fine cellulose acetate fibers intertwined randomly and disorderly. Similarly, we have limited the thickness and diameter of these nanometer-level fibers, and these nanofibers are roughly divided into two groups, one group is thick fibers, and the other group is thin fibers. The diameter of the thick fiber is greater than 1100 nm, and the diameter of the thin fiber is less than 1000 nm. In the production process of nano-cellulose acetate original film, the diameter of thick and thin fibers can be controlled by controlling the diameter of the nozzle, and the number of thick and thin fibers can also be controlled by controlling the spraying time to form th...

Embodiment 3

[0051] A kind of technique of preparing nanometer PES fiber film, comprises the following steps:

[0052] S1: Select the fiber original film, the selected nano-PES fiber original film is interwoven with thick fibers and thin fibers, and the diameter of the thick fiber is greater than 1100 nanometers, and the diameter of the thin fiber is less than 1000 nanometers; further select the nano-PES fiber original film The ratio of the number of thick fibers to thin fibers is limited, and the ratio of the number of thick fibers to thin fibers is set between 1:5-1:100, preferably between 1:15-1:50. In the original nano-PES membrane, thick fibers can play a strong enough supporting strength, and thin fibers can ensure that the subsequent finished nano-PES fiber membrane has a large enough surface area for chromatography.

[0053] S2: immerse the fibrous original membrane in the pre-wetting solution, and wet the fibrous original membrane until the fibrous original membrane becomes transp...

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Abstract

The invention relates to a nanofiber membrane for chromatography and a preparation process thereof. The nanofiber membrane comprises crude fibers and fine fibers, the diameter of the crude fibers is larger than 1100 nanometers, the diameter of the fine fibers is smaller than 1000 nanometers, and ligand modification layers are distributed on the surfaces of the crude fibers and the surfaces of the fine fibers. The diameter of the coarse fibers ranges from 1100 nanometers to 1400 nanometers, and the diameter of the fine fibers ranges from 100 nanometers to 1000 nanometers. The quantity ratio of the crude fibers to the fine fibers is 1: 5 to 1:100. The invention aims to provide a nanofiber membrane which is higher in strength, simpler and more convenient in preparation process and free of influence on performance and a preparation process thereof.

Description

technical field [0001] The invention relates to a chromatographic membrane and its preparation process, in particular to a chromatographic nanofiber membrane and its preparation process. Background technique [0002] In the current field of purification and separation, chromatography is a relatively common method. According to the mode of operation, chromatography can include column chromatography, paper chromatography, membrane chromatography, thin layer chromatography, high performance liquid chromatography and so on. [0003] In the field of membrane chromatography, the potential of nanofibrous membranes with high specific surface area and high mass transfer rate makes the flux still have more obvious advantages compared with flat membranes while having high binding capacity. In order to adapt to different application scenarios or different chromatographic requirements, or to further improve the relative performance of the nanofiber membrane, various functional modificat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D67/00D04H1/4382
CPCB01D71/68B01D67/0006D04H1/4382
Inventor 贾建东陈选卢红星
Owner HANGZHOU COBETTER TECH CO LTD
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