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A nanofiber membrane filter material with antibacterial function and preparation method thereof

A nanofiber membrane and filter material technology, applied in the field of membrane separation, can solve the problems of complex preparation process, reduce membrane porosity, and complicated process, and achieve the effects of high fiber stacking density, improved antibacterial performance, and simple process operation.

Active Publication Date: 2019-11-05
扬州云彩新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of this invention are that the preparation process of the membrane is complicated, the process is cumbersome, and there are too many coatings on the surface of the membrane, which seriously reduces the water flux of the membrane.
However, the disadvantage of this invention is that the membrane is prepared by traditional methods such as phase inversion, and its flux is very small (2 h, 0.1MPa, the maximum pore diameter is less than 240nm); and the organic antibacterial agent is easily soluble in the solvent in the casting solution, and has a low solubility in water, so it will be enriched on the membrane surface due to phase transfer when it contacts with the coagulation bath. As a result, the membrane pore structure is affected, the porosity of the membrane is reduced, and the flux of the membrane is reduced.
[0006] In summary, although the existing invention patents have used various methods to modify microfiltration or ultrafiltration membranes to endow them with excellent antibacterial properties, there are still problems of secondary pollution or low filtration performance, and it is difficult to simultaneously Meet the requirements of excellent antibacterial performance, high filtration efficiency, large flux and stable structure; in addition, there are problems in the preparation process, such as complex chemical reaction process and waste liquid pollution, making it difficult to achieve low-cost large-scale production

Method used

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  • A nanofiber membrane filter material with antibacterial function and preparation method thereof
  • A nanofiber membrane filter material with antibacterial function and preparation method thereof
  • A nanofiber membrane filter material with antibacterial function and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] The invention discloses a preparation method of a nanofiber membrane filter material with antibacterial function, which comprises the following steps:

[0035] 1) Preparation of thermoplastic polymer nanofibers: the preparation steps are as follows:

[0036] 1.1) Preparation of thermoplastic polymer / cellulose acetate butyrate composite material: 1 kg of polyvinyl alcohol-ethylene copolymer (PVA-co-PE) and cellulose acetate butyrate (CAB) were uniformly mixed in a mass ratio of 2:3, Extrude and granulate in a twin-screw extruder with a processing temperature of 150°C to prepare a PVA-co-PE / CAB composite material;

[0037] 1.2) Preparing composite fibers: Spinning and drafting the PVA-co-PE / CAB composite material prepared in the step 1.1) through a melt spinning machine to obtain composite fibers;

[0038]1.3) Preparation of thermoplastic polymer nanofibers: reflux the composite fiber prepared in the step 1.2) in acetone, control the reflux temperature to 60° C., and ref...

Embodiment 2

[0044] The invention discloses a preparation method of a nanofiber membrane filter material with antibacterial function, which comprises the following steps:

[0045] 1) Preparation of thermoplastic polymer nanofibers: the preparation steps are as follows:

[0046] 1.1) Preparation of thermoplastic polymer / cellulose acetate butyrate composite material: 1 kg of polyethylene terephthalate (PET) and cellulose acetate butyrate (CAB) were uniformly mixed in a mass ratio of 3:7, and then processed Extrude and granulate in a twin-screw extruder at a temperature of 200°C to prepare a PET / CAB composite material;

[0047] 1.2) Preparing composite fibers: Spinning and drawing the PET / CAB composite material prepared in the step 1.1) through a melt spinning machine to obtain composite fibers;

[0048] 1.3) Preparation of thermoplastic polymer nanofibers: reflux the composite fibers prepared in the step 1.2) in acetone, control the reflux temperature to 60° C., and reflux time to 72 hours ...

Embodiment 3

[0054] The invention discloses a preparation method of a nanofiber membrane filter material with antibacterial function, which comprises the following steps:

[0055] 1) Preparation of thermoplastic polymer nanofibers: the preparation steps are as follows:

[0056] 1.1) Preparation of thermoplastic polymer / cellulose acetate butyrate composite material: 1 kg of polyamide (PA) and cellulose acetate butyrate (CAB) were uniformly mixed at a mass ratio of 1:3, and the processing temperature was 200 ° C in a twin-screw Extrude and granulate in the extruder to prepare PA / CAB composite material;

[0057] 1.2) Preparing composite fibers: Spinning and drawing the PA / CAB composite material prepared in the step 1.1) through a melt spinning machine to obtain composite fibers;

[0058] 1.3) Preparation of thermoplastic polymer nanofibers: reflux the composite fibers prepared in the step 1.2) in acetone, control the reflux temperature to 60° C., and reflux time to 72 hours to extract cellul...

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Abstract

The invention discloses a nano fiber membrane filtering material with an antibacterial function and a preparation method thereof, belonging to the technical field of membrane separation. The preparation method disclosed by the invention comprises the following steps: uniformly coating the surface of a non-woven base material with a specific antibacterial agent and thermoplastic polymer in a spraying manner, preparing thermoplastic polymer nano fiber by using a melt blending separation method, and dispersing the fiber and the specific antibacterial agent by using a water-based solvent. The related processes disclosed by the invention are physical processes, and the processes are simple to operate, environment-friendly and non-pollution effects are achieved, and the industrialization is easy to realize. The nano fiber membrane filtering material with the antibacterial function, which is disclosed by the invention, has a uniform aperture, relatively high porosity and relatively dense fiber stacking density, and has not only an efficient antibacterial function, but also an excellent water generation effect.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, in particular to a nanofiber membrane filter material with antibacterial function and a preparation method thereof. Background technique [0002] As a new type of high separation, concentration, purification and purification technology, membrane separation technology has been widely used in seawater desalination, industrial wastewater treatment, environmental pollution control and other fields. Nanofiber-based filter membranes have the advantages of high specific surface area, high porosity, small pore size distribution, good pore continuity, and high flux. direction. [0003] In order to improve the fouling resistance of the membrane material, by endowing the filter membrane with antibacterial properties, at present, an antibacterial agent is usually introduced on the surface of the filter membrane, thereby inhibiting the growth of bacteria on the surface of the membrane or even kil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/02B01D67/00B01D71/38B01D71/26B01D71/56B01D71/02
CPCB01D67/0002B01D67/0079B01D69/02B01D71/021B01D71/26B01D71/38B01D71/56B01D2325/48
Inventor 刘轲王栋程盼鲁振坦李沐芳刘琼珍王跃丹王雯雯蒋海青
Owner 扬州云彩新材料科技有限公司
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