Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing flexible silicon carbide/carbon nanotube composite fiber membrane by electrospinning

A carbon nanotube composite and electrospinning technology, applied in electrospinning, fiber treatment, rayon manufacturing, etc., can solve the problems of uneven distribution of silicon carbide, complex process, high cost, etc., and achieve low cost and simple preparation process , the effect of mild conditions

Inactive Publication Date: 2018-11-09
NORTHWESTERN POLYTECHNICAL UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 103061112 A discloses a silicon carbide / carbon nanotube composite material. Specifically, carbon nanotube macroscopic bodies are used as preforms, and silicon carbide is deposited on carbon nanotubes by pyrolyzing silicon-containing precursors by chemical vapor deposition. However, the cost of this method is relatively high, and the distribution of silicon carbide on the surface of carbon nanotubes is uneven; Chinese patent CN 102021831 A discloses a three-dimensional silicon carbide fiber fabric with carbon nanotubes grown in situ. The three-dimensional silicon carbide fiber fabric is mainly composed of The silicon carbide fiber is woven, and the carbon nanotubes are grown in situ on the silicon carbide fiber three-dimensional fabric by chemical vapor deposition. This method uses a catalyst, the process is complicated, and the cost is high.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing flexible silicon carbide/carbon nanotube composite fiber membrane by electrospinning
  • Method for preparing flexible silicon carbide/carbon nanotube composite fiber membrane by electrospinning
  • Method for preparing flexible silicon carbide/carbon nanotube composite fiber membrane by electrospinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Polycarbosilane PCS and polycaprolactone PCL were dissolved in chloroform and magnetically stirred for 12 hours to form a uniform PCS / PCL spinning solution.

[0030] (2) Weighing 5% multi-walled carbon nanotubes by weight of PCS and adding them to the solution in step (1), and ultrasonicating for 30 minutes to obtain a PCS / PCL / MWCNTs mixed spinning solution.

[0031] (3) Extract 30ml of the solution in step (2) with a syringe, select the inner diameter of the needle to be 0.9mm, the advancing speed to be 0.9ml / h, the spinning voltage to be 15kV, the distance between the nozzle and the collector to be 20cm, and the type of collector to be a vertical plate collector ; Obtain composite fiber membrane.

[0032] (4) Put the precursor composite fiber in step (3) into a blast oven at 210° C. for 2 h without melting.

[0033] (5) Put the infused composite fibers in step (4) into a tube furnace for high-temperature pyrolysis treatment. The pyrolysis temperature is 1100°C, t...

Embodiment 2

[0035] (1) Polycarbosilane PCS and polystyrene PS were dissolved in tetrahydrofuran and magnetically stirred for 12 hours to form a uniform PCS / PS spinning solution.

[0036] (2) Weighing 10% multi-walled carbon nanotubes by weight of PCS and adding them to the solution in step (1), and ultrasonicating for 30 minutes to obtain a PCS / PS / MWCNTs mixed spinning solution.

[0037] (3) Extract 10ml of the solution in step (2) with a syringe, select the inner diameter of the needle to be 0.9mm, the advancing speed to be 0.9ml / h, the spinning voltage to be 10kV, the distance between the nozzle and the collector to be 25cm, and the type of collector to be a vertical plate collector , to obtain a composite fiber membrane. .

[0038] (4) Put the precursor composite fiber in step (3) into a blast oven at 210° C. for 3 hours without melting.

[0039] (5) Put the infused composite fiber in step (4) into a tube furnace for high-temperature pyrolysis treatment, the pyrolysis temperature is ...

Embodiment 3

[0041] (1) Polycarbosilane PCS and polycaprolactone PCL were dissolved in a mixed solvent composed of chloroform and N,N-dimethylformamide and magnetically stirred for 12 hours to form a uniform PCS / PCL spinning solution.

[0042] (2) Weighing 20% ​​by weight of PCS multi-walled carbon nanotubes and adding them to the solution in step (1), and ultrasonicating for 30 minutes to obtain a PCS / PCL / MWCNTs mixed spinning solution.

[0043](3) Extract 20ml of the solution in step (2) with a syringe, select the inner diameter of the needle to be 0.9mm, the advancing speed to be 0.9ml / h, the spinning voltage to be 15kV, the distance between the nozzle and the collector to be 30cm, and the type of the collector to be a drum collector, a drum The speed is 2000r / min. A composite fiber membrane was obtained.

[0044] (4) Put the precursor composite fiber in step (3) into a blast oven at 210° C. for 4 hours without melting.

[0045] (5) Put the infused composite fibers in step (4) into a ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
elastic modulusaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a flexible silicon carbide / carbon nano tube composite fiber membrane by electrostatic spinning. Silicon carbide precursor (polycarbosilane PCS) and easy-spinning polymer are added to an organic solvent and stirred for some time, then carbon nano tubes are added for ultrasonic dispersion, a polycarbosilane / carbon nano tube composite spinning solution is obtained, and a polycarbosilane / carbon nano tube composite fiber membrane is obtained by performing electrostatic spinning on the solution; and a flexible silicon carbide / carbon nano tube composite fiber membrane is obtained after non-melting treatment and high-temperature pyrolysis treatment are performed on the polycarbosilane / carbon nano tube composite fiber membrane. The invention provides the method for preparing the flexible silicon carbide / carbon nano tube composite fiber membrane by electrostatic spinning, well-dispersed carbon nano tubes are introduced into the silicon carbide fiber, the flexible composite fiber membrane having good mechanics, electrics and microwave absorbing properties is obtained, and the method has a good application prospect in the fields of microwave absorbing stealth materials, high temperature sensors and composite material enhancement.

Description

technical field [0001] The invention belongs to the field of composite fiber preparation, and relates to a method for preparing a flexible silicon carbide / carbon nanotube composite fiber film by electrospinning, including precursor spinning solution configuration, electrospinning, precursor non-melting treatment and pyrolysis process. Background technique [0002] Silicon carbide fiber has a series of excellent properties such as high strength, high modulus, corrosion resistance, acid and alkali resistance, and space radiation resistance, and is a ceramic fiber with low relative density. Compared with carbon fiber, it has better high temperature oxidation resistance. SiC ceramic fibers have great application potential in wave-absorbing stealth, high-temperature sensors, high-temperature filtration, and catalyst loading. They are widely used in cutting-edge defense fields such as aviation, aerospace, nuclear energy, and weapons. They are known as aerospace and high-tech fiel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00D01F9/10D01F1/10
CPCD01D5/0007D01D5/0092D01F1/10D01F9/10D04H1/728
Inventor 张亚妮陈绮侯翼成来飞张立同
Owner NORTHWESTERN POLYTECHNICAL UNIV