Nanofiber filter membrane with anti-bacteria and anti-pollution functions, and preparation method of nanofiber filter membrane

A nanofiber and filtration membrane technology, applied in the field of nanofiber filtration membrane and its preparation, can solve the problems of easy pollution, environmental pollution, complex preparation method, etc., and achieve excellent filtration performance, high graft yield, hydrophilicity Enhanced effect

Active Publication Date: 2021-01-22
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of the filter membrane has defects such as complicated preparation methods, easy to cause environmental pollution, and easy to be polluted in actual filtration.

Method used

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  • Nanofiber filter membrane with anti-bacteria and anti-pollution functions, and preparation method of nanofiber filter membrane
  • Nanofiber filter membrane with anti-bacteria and anti-pollution functions, and preparation method of nanofiber filter membrane
  • Nanofiber filter membrane with anti-bacteria and anti-pollution functions, and preparation method of nanofiber filter membrane

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The invention provides a method for preparing a nanofiber filter membrane for bioseparation with antibacterial and antifouling functions, comprising the following steps:

[0042] S1, PVA-co-PE nanofibers were prepared by melt blending phase separation method;

[0043] S2, disperse the PVA-co-PE nanofibers prepared in step S1 in the mixed solution of isopropanol and water according to the ratio of mass concentration of 5-20%, stir evenly, prepare nanofiber suspension, and seal and store ;

[0044] S3, coating the nanofiber suspension prepared in step S2 on one or both surfaces of the nonwoven support layer, and after drying at room temperature, preparing a composite nanofiber filter layer loaded on the surface of the nonwoven support layer filter membrane;

[0045] S4, soak the composite filter membrane prepared in step S3 in the mixed solution containing the amphoteric compound of the grafted monomer, carry out the grafting reaction under certain conditions, then rins...

Embodiment 1

[0078] Embodiment 1 of the present invention provides a method for preparing a nanofiber filter membrane for bioseparation with antibacterial and antifouling functions, comprising the following steps:

[0079] S1, PVA-co-PE nanofibers were prepared by melt blending phase separation method;

[0080] S2, the PVA-co-PE nanofiber prepared in step S1 is dispersed in a mixed solution with a mass ratio of isopropanol and deionized water of 1:1 according to a mass concentration of 10%, and stirred evenly to prepare a nanofiber Fiber suspension, sealed and preserved;

[0081] S3, coating the nanofiber suspension prepared in step S2 on one surface of a nonwoven polypropylene support layer (with an average pore size of 1 to 20 μm), and the coating thickness is 5 μm; after drying at room temperature, the nonwoven fabric is prepared A composite filter membrane with a nanofiber filter layer loaded on the surface of the cloth support layer;

[0082] S4, soaking the composite filter membran...

Embodiment 2-5

[0091] The difference from Example 1 lies in that the temperature and time of the grafting reaction are set differently, and other steps are the same as in Example 1, and will not be repeated here.

[0092] Table 1 is the process parameter setting and performance parameter thereof of embodiment 1-5 and comparative example 1

[0093]

[0094]

[0095] Combined with Table 1 for analysis:

[0096] The influence of temperature and reaction time of grafting reaction on grafting reaction (or modified nanofiber filter layer) is: grafting reaction temperature and time increase, and graft rate increases, and initial water flux can decline to some extent, but cleaning The post-flux recovery increases, and the anti-fouling performance of the nanofibrous membrane is enhanced.

[0097] The composite filter membrane prepared in Comparative Example 1 does not have antibacterial and antibacterial properties, and has poor anti-pollution performance.

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Abstract

The invention provides a nanofiber filter membrane with anti-bacteria and anti-pollution functions, and a preparation method of the nanofiber filter membrane. The nanofiber filter membrane with the anti-bacteria and anti-pollution functions is formed by compounding a non-woven fabric supporting layer and a modified nanofiber filter layer loaded on the surface of the non-woven fabric supporting layer, wherein the modified nanofiber filter layer is composed of nano-fibers subjected to graft modification treatment. According to the invention, modification treatment of a nanofiber filter membraneis realized through grafting reaction of nanofiber and a grafting monomer amphoteric compound, and the nanofiber filter membrane integrates excellent filtering performance, degerming performance, antibacterial performance and anti-fouling performance, and is a filter membrane with excellent comprehensive performance in the field of liquid filtration and separation; and the preparation method is simple and controllable in process and low in cost, and has a large-scale popularization value.

Description

technical field [0001] The invention relates to the technical field of preparation of filter membrane materials, in particular to a nanofiber filter membrane with antibacterial and antifouling functions and a preparation method thereof. Background technique [0002] Nanofibers have the advantages of large specific surface area, good biocompatibility, and low fluid resistance. Combining nanofiber membranes with traditional nonwoven fabrics to form a three-dimensional composite membrane structure is widely used in the field of liquid filtration and separation, such as Portable water purification equipment, wastewater treatment equipment, reverse osmosis pretreatment, sewage separation, pharmaceutical, food, biological and drinking water industries, etc. [0003] However, the existing nanofiber filtration membrane has the defect of single function, does not have antibacterial and sterilizing properties at the same time, and is extremely prone to membrane fouling during use, mai...

Claims

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Application Information

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IPC IPC(8): B01D71/78B01D69/02B01D67/00
CPCB01D71/78B01D69/02B01D67/0011B01D2325/48Y02W10/10
Inventor 王栋程芹刘轲贾晓丹周鹏程程盼胡威郭启浩武艺夏明
Owner WUHAN TEXTILE UNIV
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