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Composite chromatography filtering membrane material based on nanofibers and polymer microspheres and preparation method of composite chromatography filtering membrane material

A nanofiber and polymer technology, which is applied in the field of composite chromatography filtration membrane materials based on nanofibers and polymer microspheres and their preparation, can solve the problem of large differences in size and structure between inorganic micron active particles and nanofibers, and water treatment retention. It can solve the problems of poor efficiency and retention stability, and it is difficult to achieve the optimal pore structure of membrane materials, so as to achieve excellent cation adsorption, improve chromatography efficiency and filtration-chromatography stability, and improve filtration stability and filtration efficiency.

Active Publication Date: 2022-04-05
武汉维晨科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the material can regulate the structure of the fiber membrane material to a certain extent, the size and structure of the inorganic micron active particles and nanofibers are quite different. Subsequent experiments show that the pore structure of the membrane material prepared by this method is still difficult to achieve the optimal structure. Moreover, the retention rate and retention stability for water treatment are not good
[0006] Therefore, the pore size structure of the filter material in the above technical solution is still not optimized, and the water permeation flux still needs to be further improved, and the adsorption principle is mainly physical adsorption, and the adsorption strength and selectivity are poor.

Method used

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  • Composite chromatography filtering membrane material based on nanofibers and polymer microspheres and preparation method of composite chromatography filtering membrane material
  • Composite chromatography filtering membrane material based on nanofibers and polymer microspheres and preparation method of composite chromatography filtering membrane material
  • Composite chromatography filtering membrane material based on nanofibers and polymer microspheres and preparation method of composite chromatography filtering membrane material

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preparation example Construction

[0038] A kind of preparation method of the composite chromatographic filtration membrane material based on nanofiber and polymer microsphere provided by the present invention comprises the following steps:

[0039] S1. Mix PVA-co-PE nanofibers and sulfonated polymer microspheres according to a preset mass ratio to prepare a suspension; wherein, the particle size and mass of the sulfonated polymer microspheres are respectively greater than or equal to PVA-co-PE The diameter and mass of nanofibers; preferably, the preset mass ratio of nanofibers and sulfonated polymer microspheres is 1:(1-4), more preferably 1:(1.5-3), more preferably 1:2 . The solvent of the suspension is a mixed solvent of ethanol and water, preferably ethanol and water with a volume ratio of 1:1. The present invention selects PVA-co-PE nanofibers and sulfonated polymer microspheres to make composite membranes. On the one hand, both of them have hydrophilic groups and good compatibility, which is convenient f...

Embodiment 1-3

[0061] A method for preparing a composite chromatographic filtration membrane material based on nanofibers and polymer microspheres, comprising the following steps:

[0062] PVA-co-PE and cellulose acetate butyrate (CAB) were blended and spun to produce 100nm PVA-co-PE nanofibers by melt spinning phase separation method, and 12g of 100nm PVA-co-PE nanofibers were taken. Take by weighing the 100nm sulfonated polystyrene microsphere solution of different quality according to table 1, be dissolved in 1L water and the ratio of ethanol is in the mixed solution of 1:1, then the 100nmPVA-co-PE nanofiber of 12g is dispersed in respectively The mixture is configured as a 12g / L suspension. The gram weight is 50g / m 2 On the PP spunbond cloth, uniform coating 6g / m 2 100nm PVA-co-PE nanofibers, after drying at room temperature, the filter layer is 6g / m 2 Composite membrane filter material of nanofibers and sulfonated microspheres. see figure 1 As shown, it shows that the composite mem...

Embodiment 2

[0069] From Figure 5 It can be seen that after adding sulfonated microspheres, the pore size of the fiber membrane decreases, and the more the amount of sulfonated microspheres is added, the smaller the pore size; it can be seen from Table 1 that although the pore size of Example 2 is reduced to that of Comparative Example 1 In general, but the water flux is not significantly lower than that of Comparative Example 1, so that the filtration efficiency is significantly increased while still maintaining a high water consumption. combine Figure 6 It can be seen that the water flux of the fiber membrane without adding sulfonated microspheres decreases significantly with the increase of filtration time, and drops by about 40% after 30 minutes, indicating that the filtration stability is not good. After a certain period of use, the fiber membrane is blocked . And embodiment 2 drops about 25% after 30min, illustrates that adding sulfonated microspheres helps to improve filtration ...

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Abstract

The invention provides a composite chromatography filtering membrane material based on nanofibers and polymer microspheres and a preparation method thereof. Mixing the PVA-co-PE nanofibers and the sulfonated polymer microspheres according to a preset mass ratio to prepare a suspension; then preparing the suspension into a fiber membrane material, and distributing the sulfonated polymer microspheres on the fiber surface and among fiber pores of the fiber membrane material to form a multi-level filtering pore structure, so as to synchronously improve the flux, the rejection rate, the filtering stability and the cation adsorption performance of the fiber membrane material. The nanofiber and the sulfonated polymer microspheres with higher content are compounded to prepare the membrane material, and the optimization of the membrane material structure is realized, so that the permeation flux is improved; meanwhile, the sulfonated polymer microspheres have excellent cation adsorbability, swelling property and good toughness, the strength of the membrane material is improved, and the membrane material can be applied to filtration and chromatography under high pressure, so that the filtration-chromatography efficiency and the filtration-chromatography stability are improved.

Description

technical field [0001] The invention relates to the technical field of filter material preparation, in particular to a composite chromatographic filtration membrane material based on nanofibers and polymer microspheres and a preparation method thereof. Background technique [0002] With the development of society and economy, industries such as environmental governance and medicine have put forward higher requirements for the filtration and separation effect and functionality of filtration and separation membrane materials. Designing an excellent multifunctional filtration membrane material structure is of great significance for efficient and low-consumption water treatment. . Good filtration and separation membrane materials usually should have 1) high flux to reduce filtration resistance and improve filtration efficiency; 2) high retention rate to improve adsorption and retention of harmful substances in water; 3) high filtration stability to Improve the service life of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/00B01D71/66D01F8/02D01F8/10
CPCY02A20/131
Inventor 王栋刘轲胡威程盼梅涛郭启浩李沐芳蒋海青
Owner 武汉维晨科技有限公司
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