Preparation method and functionalization process for fiber-reinforced hollow nanofiber membrane

A nanofiber membrane and fiber-reinforced technology, which is applied in the fields of fiber chemical characteristics, chemical instruments and methods, and rayon manufacturing, can solve the problems of being unsuitable for universal promotion, cumbersome preparation methods, and unsatisfactory effects, and achieve an excellent interface The effect of combining properties, excellent mechanical properties, and excellent catalytic properties

Inactive Publication Date: 2018-11-09
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above methods for preparing reinforced nanofibrous membranes have improved their mechanical properties to a certain extent, their effects are not ideal, and the preparation methods are relatively cumbersome.
In addition, the reinforcement method is only suitable for some specific polymer materials, which has certain limitations and is not suitable for universal promotion, and the prepared nanofiber membranes are all flat and single-form

Method used

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  • Preparation method and functionalization process for fiber-reinforced hollow nanofiber membrane
  • Preparation method and functionalization process for fiber-reinforced hollow nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Use a 24-spindle two-dimensional braiding machine to weave a bundle of 400D polymphenylene isophthalamide (PMIA) filaments into a PMIA tubular braid with a diameter of 1.5 mm as a reinforcement;

[0039] 2) Use the following method to prepare a solution for electrospinning. Dissolve lithium chloride (LiCl) in N,N-dimethylacetamide (DMAc), add PMIA, stir fully at 70°C until completely dissolved, That is, the solution for electrospinning is obtained;

[0040] Among them, the mass fractions of LiCl, DMAc and PMIA are 2%, 86%, 12% respectively;

[0041] 3) After defoaming the electrospinning solution obtained in step 2), place it in the electrospinning equipment, place the reinforcing body on the stainless steel filament, as the receiver of the electrospinning equipment, and perform electrospinning under the following conditions Silk: Electrospinning time is 10min, spinning temperature is 20°C, spinning relative humidity is 60%, spinning positive high voltage is 15kV, n...

Embodiment 2

[0045] 1) Use a 24-spindle two-dimensional braiding machine to weave a bundle of polyester filaments with a specification of 400D into a tubular braid with a diameter of 1.1 mm as a reinforcement;

[0046] 2) Use the following method to prepare a solution for electrospinning. Dissolve lithium chloride (LiCl) in N,N-dimethylacetamide (DMAc), add PMIA, stir fully at 70°C until completely dissolved, That is, the solution for electrospinning is obtained;

[0047] Among them, the mass fractions of LiCl, DMAc and PMIA are 2%, 86%, 12% respectively;

[0048] 3) After defoaming the electrospinning solution obtained in step 2), place it in the electrospinning equipment, place the reinforcing body on the stainless steel filament, as the receiver of the electrospinning equipment, and perform electrospinning under the following conditions Silk: Electrospinning time is 30min, spinning temperature is 20°C, spinning relative humidity is 65%, spinning positive high voltage is 20kV, negative ...

Embodiment 3

[0051] 1) Use a 24-spindle two-dimensional braiding machine to weave a bundle of polyester filaments with a specification of 400D into a tubular braid with a diameter of 1.1 mm as a reinforcement;

[0052] 2) Use the following method to prepare a solution for electrospinning. Dissolve lithium chloride (LiCl) in N,N-dimethylacetamide (DMAc), add PMIA, stir fully at 70°C until completely dissolved, That is, the solution for electrospinning is obtained;

[0053] Among them, the mass fractions of LiCl, DMAc and PMIA are 2%, 83%, and 15% respectively;

[0054] 3) After defoaming the electrospinning solution obtained in step 2), place it in the electrospinning equipment, place the reinforcing body on the stainless steel filament, as the receiver of the electrospinning equipment, and perform electrospinning under the following conditions Silk: Electrospinning time is 60min, spinning temperature is 20°C, spinning relative humidity is 65%, spinning positive high voltage is 20kV, negat...

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Abstract

The invention discloses a preparation method and functionalization process for a fiber-reinforced hollow nanofiber membrane. The preparation method comprises the following steps: 1) braiding a tubularbraid as a reinforcement by using a two-dimensional braiding technique; and 2) preparing an electrospinning solution, subjecting the prepared electrospinning solution to defoaming, putting the electrospinning solution in an electrospinning device, installing the reinforcement on the receiving unit of the electrospinning device, and carrying out electrospinning under condition of a temperature of15 to 50 DEG C, a relative humidity of 50 to 80%, a positive high voltage of 5 to 35 kV, a negative high voltage of 0 to 10 kV, a solution propulsion speed of 0.2-3 mL / h, a needle inner diameter of 0.16-2.0 mm and a rotating speed of 500-3000 r / min so as to obtain the product with improved mechanical properties. The preparation method is simple in process, low in cost and convenient for industrialimplementation. The functionalization process comprises the following steps: sequentially immersing the fiber-reinforced hollow nanofiber membrane in a modified solution and a metal ion salt solution, and carrying out washing and drying so as to obtain a product having catalytic properties.

Description

technical field [0001] The invention relates to the field of hollow fiber membrane preparation, in particular to a preparation method and a functionalization method of a fiber-reinforced hollow nanofiber membrane. Background technique [0002] As a technology for preparing nanofiber materials by using electrostatic field force, electrospinning technology has been extensively and deeply studied at home and abroad in recent years. The diameter of nanofibers prepared by electrospinning technology is between tens and hundreds of nanometers. The ultra-fine fiber diameter makes the electrospun nanofiber membrane have the advantages of high specific surface area and porosity, which is easy to carry out surface modification. Sexuality and functionality. Electrospun nanofiber membranes are widely used in the fields of air filtration membrane materials, reaction catalyst carriers, ultra-high sensitivity biosensors, biological tissue engineering, new energy battery diaphragms, and mem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/30B01J31/26B01J31/06B01J35/06C02F1/00D01F1/10D01F6/90C02F101/30C02F101/34C02F101/38
CPCB01J31/06B01J31/26B01J31/30B01J35/065C02F1/00C02F2101/308C02F2101/345C02F2101/38D01F1/10D01F6/905
Inventor 肖长发陈明星王纯刘海亮颜鼎荷
Owner TIANJIN POLYTECHNIC UNIV
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