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Preparation method of surface function synchronous modified flexible nanofiber composite membrane

A nanofiber and modification technology, which is applied in the field of preparation of flexible nanofiber composite membranes with synchronous modification of surface functions, can solve the problems of poor adhesion of functional materials and poor uniformity of film formation, so as to improve application performance, increase loading rate, and increase ratio Effect of Capacitance Characteristics

Pending Publication Date: 2020-07-03
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims to provide a method for preparing a flexible nanofiber composite membrane with synchronous modification of surface functions, using a synchronous modification process of surface functional materials to improve the loading rate of functional modification materials on the surface of spun fibers, while avoiding the Problems such as poor film uniformity and poor adhesion of functional materials caused by material agglomeration can economically, efficiently and stably obtain composite nanofibrous membranes with high loading rate of functional modification materials, and improve the utilization efficiency of functional modification materials in the field of nano-manufacturing. reduce manufacturing costs

Method used

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  • Preparation method of surface function synchronous modified flexible nanofiber composite membrane
  • Preparation method of surface function synchronous modified flexible nanofiber composite membrane
  • Preparation method of surface function synchronous modified flexible nanofiber composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Prepare a mixed solution of graphene and polymer

[0037] Dissolving the graphene powder and polymer powder PVDF in an organic solvent, fully stirring, and fully shaking in an ultrasonic oscillator, so that the graphene particles are evenly dispersed in the mixed solution, and an electrospinning inner shaft solution is obtained.

[0038] (2) Preparation of graphene suspension

[0039] The graphene powder is dissolved in an organic solvent, fully stirred and oscillated to obtain a uniformly mixed graphene suspension.

[0040] (3) Synchronous modification process to prepare composite fiber membrane

[0041] Fill the mixed reagent of high molecular polymer and graphene prepared in the step (1) in the first injection needle tube 4, make the reagent pass into the inner shaft channel of the coaxial spinning needle 7 by the first syringe pump 1, the step The graphene suspension prepared in (2) is filled in the second injection needle tube 5, and the reagent is passed int...

Embodiment 2

[0046] (1) Prepare a mixed solution of graphene and polymer

[0047] Dissolving the graphene powder and polymer powder PVDF in an organic solvent, fully stirring, and fully shaking in an ultrasonic oscillator, so that the graphene particles are evenly dispersed in the mixed solution, and an electrospinning inner shaft solution is obtained.

[0048] (2) Preparation of graphene suspension

[0049] The graphene powder is dissolved in an organic solvent, fully stirred and oscillated to obtain a uniformly mixed graphene suspension.

[0050] (3) Preparation of composite fiber membrane by coaxial spinning process

[0051] Fill the mixed reagent of high molecular polymer and graphene prepared in the step (1) in the first injection needle tube 4, make the reagent pass into the inner shaft channel of the coaxial spinning needle 7 by the first syringe pump 1, the step The graphene suspension prepared in (2) is filled in the second injection needle tube 5, and the reagent is passed into...

Embodiment 3

[0055] (1) Prepare a mixed solution of graphene and polymer

[0056] The polymer powder PVDF is dissolved in an organic solvent, and the electrospinning solution is obtained after fully stirring.

[0057] (2) Preparation of graphene suspension

[0058] The graphene powder is dissolved in an organic solvent, fully stirred and oscillated to obtain a uniformly mixed graphene suspension.

[0059] (3) Preparation of polymer fiber membrane

[0060] The electrospinning solution prepared in step (1) is used to prepare a polymer fiber membrane through an electrospinning process.

[0061] (4) Preparation of composite fiber membrane by electrostatic atomization modification

[0062] The PVDF fiber film that step (3) is obtained is placed on collecting cylinder 11, the graphene suspension prepared in step (2) is passed in the atomizing nozzle 8 by the 3rd injection needle tube 6, by the 3rd injection pump 3 Control the atomization speed, use the second high-voltage power supply 10 to ...

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Abstract

The invention discloses a preparation method of a surface function synchronous modified flexible nanofiber composite membrane. The preparation method comprises the following steps that (1), a mixed solution of function modified nanoparticles and a high-molecular polymer is prepared; (2), a functional modified nanoparticle suspension is prepared; (3), the flexible nanofiber composite membrane is prepared by utilizing an electrostatic spinning device and an atomizing device and adopting a synchronous modification process; and (4), the flexible nanofiber composite membrane is dried in a vacuum environment to obtain the dried composite fiber membrane. According to the method, the modified particles can be distributed inside and on the surface of the high-molecular polymer fiber at the same time, the loading rate of the modified particles on the surface of the fiber is greatly increased, the contact area of a functional material is increased, and the purpose of fiber surface functional modification is achieved; and various purposes of improving the conductivity, the specific surface area (BET), the catalytic ability, the specific capacitance characteristic, the energy storage efficiencyand the like of the composite fiber membrane can be achieved by adding different modified particles.

Description

technical field [0001] The invention relates to the field of nanocomposite materials, in particular to a method for preparing a flexible nanofiber composite membrane with synchronous surface function modification. Background technique [0002] With the rapid development of science and technology, flexible functional composite membranes have a wide range of demands in the fields of flexible electronic devices, pollution purification, catalytic adsorption, and biomedicine. The development of a flexible functional composite membrane with flexibility, high stability, high electrical and chemical properties has become a research focus in the field of nanocomposites. [0003] Electrospinning, as an economical and convenient micro-nano structure jet manufacturing technology, has become the mainstream nanofiber manufacturing technology due to its advantages of simple process, convenient operation, and good material compatibility. Nanofiber membranes prepared by electrospinning have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00D01F6/48D01F1/10D01D1/02
CPCD04H1/728D01D5/0015D01D5/0061D01D5/0069D01F6/48D01F1/10D01D1/02
Inventor 郑高峰彭昊傅刚姜佳昕柳娟郑建毅刘益芳
Owner XIAMEN UNIV
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