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Electrostatic spinning directional nanofiber membrane and preparation method and application thereof

A nanofiber membrane, electrospinning technology, applied in electrospinning, fiber processing, filament/line forming and other directions, can solve the disadvantages of the application prospect of polyimide nanofiber membrane lithium battery separator, the poor porosity of fiber membrane. Uniform, uneven pore size, etc., to achieve the effect of uniform pore size, low cost, and high porosity

Inactive Publication Date: 2016-09-28
苏州纳赛博丝新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a long time, the polymer nanofibers under microscopic observation are uneven, of different lengths, and disorderly, resulting in uneven porosity and pore size of the fiber membrane, which is not conducive to the use of polyimide nanofiber membranes as lithium battery separators. Therefore, realizing the directional arrangement of polymer nanofibers has always been the dream of researchers

Method used

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  • Electrostatic spinning directional nanofiber membrane and preparation method and application thereof
  • Electrostatic spinning directional nanofiber membrane and preparation method and application thereof
  • Electrostatic spinning directional nanofiber membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of nanofibrous membrane with PMDA---ODA as raw material and DMPA as solvent

[0028] (1) Dissolve 0.674g ODA in 6ml DMAC, after it is completely dissolved, add 0.64g PMDA three times at low temperature. Stir mechanically at low temperature for 24 hours.

[0029] (2) Electrospinning was performed in a self-made electrospinning device, and the electrospinning parameters were: DMAC as a solvent, a spinning voltage of 18Kv, a collection distance of 12cm, and a No. 10 spinning needle. The rotation parameter of the receiving drum device: 2000r / min. The electrospinning flow rate is 0.8ml / h, and the electrospinning time is one hour.

[0030] (3) The prepared polyamic acid nanofiber membrane is imidized, and the high-temperature thermal imidization adopts the following steps: 1) Heating from room temperature to 170°C, the heating rate is about 10°C / min, and staying at 170°C for 30 minutes ; 2) Then raise the temperature to 250°C and stay for 30 minutes; 3) Rapidly...

Embodiment 2

[0032] Preparation of nanofibrous membrane with PMDA---bisphenol A (BPA) as raw material and DMPA as solvent

[0033] (1) Dissolve 0.65g of BPA in 6ml of DMAC. After it is completely dissolved, add 0.64g of PMDA in three times at low temperature. Stir mechanically at low temperature for 24 hours.

[0034] (2) Electrospinning was performed in a self-made electrospinning device, and the electrospinning parameters were: DMAC as a solvent, a spinning voltage of 18Kv, a collection distance of 12cm, and a No. 10 spinning needle. The rotation parameter of the receiving drum device: 2000r / min. The electrospinning flow rate is 0.8ml / h, and the electrospinning time is one hour.

[0035] (3) The prepared polyamic acid nanofiber membrane is imidized, and the high-temperature thermal imidization adopts the following steps: 1) Heating from room temperature to 170°C, the heating rate is about 10°C / min, and staying at 170°C for 30 minutes ; 2) Then raise the temperature to 250°C and stay f...

Embodiment 3

[0037] Preparation of nanofibrous membrane with PMDA---BPA as raw material and DMF as solvent

[0038] (1) Dissolve 0.65g of BPA in 6ml of DMF, after it is completely dissolved, add 0.64g of PMDA in three times at low temperature. Stir mechanically at low temperature for 24 hours.

[0039] (2) Electrospinning was performed in a self-made electrospinning device, and the electrospinning parameters were: DMF as a solvent, a spinning voltage of 18Kv, a collection distance of 12cm, and a No. 10 spinning needle. The rotation parameter of the receiving drum device: 2000r / min. The electrospinning flow rate is 0.8ml / h, and the electrospinning time is one hour.

[0040] (3) The prepared polyamic acid nanofiber membrane is imidized, and the high-temperature thermal imidization adopts the following steps: 1) Heating from room temperature to 170°C, the heating rate is about 10°C / min, and staying at 170°C for 30 minutes ; 2) Then raise the temperature to 250°C and stay for 30 minutes; 3)...

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Abstract

The invention discloses an orienting fiber membrane through electrospinning, a preparation method and application thereof. The preparation method of the present invention mainly includes the following steps: the preparation of polyamic acid electrospinning solution; accepting the fiber membrane through a self-made electrospinning receiving device, and the nanofiber has a certain orientation; Amination to prepare polyimide nanofiber membrane. The invention adopts a relatively simple process, and realizes good orientation of the nanofiber through a simple receiving device.

Description

technical field [0001] The invention belongs to the technical field of electrospinning, and relates to an electrospinning oriented nanofiber membrane and a preparation method thereof. Background technique [0002] The diaphragm is located between the positive and negative electrodes of the lithium-ion battery. It mainly plays the role of separating the positive and negative electrodes, preventing the positive and negative electrodes from directly contacting each other. At the same time, it provides a transmission channel between the positive and negative electrodes for lithium ions and can stop lithium ions under abnormal conditions. transmission for battery safety. Separator is an important part of lithium-ion battery, which plays an important role in battery safety performance, battery life and discharge specific capacity. [0003] Polyimide refers to a class of polymers containing imide rings on the main chain. Polyimide fibers mainly refer to high-performance fibers sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4342D01D5/00D06C7/00C08G73/10
CPCD04H1/728C08G73/1071D01D5/003D01D5/0069D01D5/0076D01D5/0092D04H1/4342D06C7/00
Inventor 冯章启王婷
Owner 苏州纳赛博丝新材料科技有限公司
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