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A kind of nanofiber membrane for chromatography and its preparation process

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

Active Publication Date: 2022-07-01
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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  • A kind of nanofiber membrane for chromatography and its preparation process
  • A kind of nanofiber membrane for chromatography and its preparation process
  • A kind of nanofiber membrane for chromatography and its preparation process

Examples

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Embodiment 1

[0038] A nano-PES fiber membrane for chromatography, wherein the original membrane material of the nano-fiber membrane is selected as PES material. In other embodiments, the original film may be an acetate fiber material, a polyester fiber material, etc., but the selected raw materials are different, and the fiber structure is similar. The structure of this nano-PES fiber film was observed by electron microscope, and it was found that the film was formed by disorderly and random interweaving of several nano-scale fine PES fibers. However, we have limited the thickness and diameter of these nano-scale fibers, and these nano-fibers are roughly divided into two groups, one group is thick fibers and the other group is thin fibers. Thick fibers have diameters greater than 1100 nanometers and fine fibers have diameters less than 1000 nanometers. In the production process of PES fibrous film, the diameter of the coarse fibers and fine fibers can be controlled by controlling the diam...

Embodiment 2

[0048] A nano-cellulose acetate membrane for chromatography, wherein the original membrane material of the nano-fiber membrane is selected as cellulose acetate. The structure of this nano-cellulose acetate membrane was observed by electron microscope, and it was found that the membrane was formed by disorderly and random interweaving of several nano-scale fine cellulose acetate fibers. Similarly, we have defined the thickness and diameter of these nano-scale fibers, which are roughly divided into two groups within these nano-fibers, one group is thick fibers and the other group is thin fibers. Thick fibers have diameters greater than 1100 nanometers and fine fibers have diameters less than 1000 nanometers. In the production process of the nanocellulose acetate original film, the diameter of the thick fibers and the fine fibers can be controlled by controlling the diameter of the nozzle, and the time of spraying can also be controlled to control the number of thick fibers and f...

Embodiment 3

[0051] A process for preparing nano-PES fiber membrane, comprising the following steps:

[0052] S1: Select a fibrous membrane, the selected nano-PES fibrous membrane is interwoven with thick fibers and fine fibers, and the diameter of the thick fibers is greater than 1100 nanometers, and the diameter of the thin fibers is less than 1000 nanometers; further, the selected nano-PES fibrous membranes are The quantity ratio of coarse fibers and fine fibers is limited, and the quantity ratio of coarse fibers and fine fibers is set between 1:5-1:100, preferably between 1:15-1:50. In the original nano-PES membrane, the thick fibers can play a strong enough supporting strength, and the 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 membrane in the pre-wetting solution, and wet the fibrous membrane until the fibrous membrane becomes transparent. In this embodiment, the pre...

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Abstract

The invention relates to a nanofiber membrane for chromatography and a preparation process thereof. The nanofiber membrane includes coarse fibers and fine fibers, wherein the diameter of the coarse fibers is greater than 1100 nanometers, the diameter of the fine fibers is less than 1000 nanometers, and the A ligand-modified layer is distributed on the surface of the coarse and fine fibers. The diameter of the thick fibers is between 1100 nanometers and 1400 nanometers, and the diameter of the thin fibers is between 100 nanometers and 1000 nanometers. The quantity ratio of the coarse fibers and the fine fibers is between 1:5-1:100. The purpose to be achieved by the present invention is to provide a nanofiber membrane with higher strength, simpler preparation process and no influence on performance and its preparation process.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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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