Check patentability & draft patents in minutes with Patsnap Eureka AI!

Atomic oxygen-resistant polyimide nanofiber membrane as well as preparation method and application thereof

A technology of nanofiber membrane and oxypolyimide, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, single-component synthetic polymer rayon, etc., can solve the problem of uneven dispersion of metals, metal compounds or non-metal compounds, and the influence of PI material application and other issues

Active Publication Date: 2022-07-08
CHINA UNIV OF GEOSCIENCES (BEIJING)
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can effectively prevent the undercutting of AO, due to physical doping, the metal, metal compound or non-metal compound with anti-AO ability may be dispersed unevenly in the PI material matrix, resulting in the partial erosion of PI material by AO. Influence, and then affect the application of PI materials prepared by composite material method in low earth orbit spacecraft

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
  • Atomic oxygen-resistant polyimide nanofiber membrane as well as preparation method and application thereof
  • Atomic oxygen-resistant polyimide nanofiber membrane as well as preparation method and application thereof
  • Atomic oxygen-resistant polyimide nanofiber membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] The present invention also provides the preparation method of the atomic oxygen-resistant polyimide nanofiber membrane according to the above technical solution, comprising the following steps:

[0056] The aromatic diamine monomer, the cage-containing polysilsesquioxane diamine monomer, the aromatic dianhydride monomer and the aprotic strong polar solvent are mixed, and a polymerization reaction is carried out to obtain a polyamic acid solution;

[0057] The aromatic diamine monomer is 2,5-bis[(4-aminophenoxy)phenyl]diphenylphosphine oxide or 4,4'-diaminodiphenyl ether; the aromatic dianhydride monolayer The monomer is pyromellitic dianhydride or 3,3',4,4'-biphthalic dianhydride; the cage-containing polysilsesquioxane diamine monomer is N-[(heptaisobutyl -POSS) propyl]-3,5-diaminobenzamide;

[0058] Electrospinning the polyamic acid solution to obtain a polyamic acid nanofiber membrane;

[0059] The polyamic acid nanofiber film is subjected to an imidization reaction...

Embodiment 1

[0091] At room temperature, 19.0325 g (38.65 mmol) BADPO, 7.2588 g (7.196 mmol) DA-POSS and 120 g DMAc (N,N-dimethylethyl acetate) were added to a 500 mL three-necked flask equipped with a mechanical stirrer, a cold water bath and a nitrogen inlet. amide), stir for 1h until the solid dissolves to form a homogeneous solution, add 10g (45.846mmol) PMDA and 85.7g DMAc to the above solution, stir for 1h until the solid dissolves to form a homogeneous solution, and then carry out the polymerization reaction at 5°C for 24h in a nitrogen atmosphere, the reaction During the process, stirring was performed to obtain a PAA solution with a solid content of 15 wt.%;

[0092] Add DMAc to adjust the viscosity of the PAA solution to 4000mPa·s, then add the PAA solution into a 5mL syringe equipped with a stainless steel needle spinneret with an inner diameter of 0.50mm, apply a positive voltage of 15kV to the syringe and receiver and - The negative voltage of 2kV, the distance between the rec...

Embodiment 2

[0095] At room temperature, 13.8304 g (28.082 mmol) BADPO, 5.9576 g (5.906 mmol) DA-POSS and 100 g DMAc (N,N-dimethylethyl acetate) were added to a 500 mL three-necked flask equipped with a mechanical stirrer, a cold water bath and a nitrogen inlet. amide), stir for 1h until the solid dissolves to form a homogeneous solution, add 10g (33.988mmol) BPDA and 68.8g DMAc to the above solution, stir for 1h until the solid dissolves to form a homogeneous solution, and then conduct a polymerization reaction at 5°C for 24h in a nitrogen environment, the reaction During the process, stirring was performed to obtain a PAA solution with a solid content of 15 wt.%;

[0096] The remaining steps are the same as those in Example 1, to obtain atomic oxygen-resistant polyimide nanofiber membrane (m=83, n=17, DA-POSS accounts for 20% of the total mass of BPDA, BADPO and DA-POSS), polyimide The structural formula is

[0097]

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
Glass transition temperatureaaaaaaaaaa
Transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of functional fiber materials, and particularly relates to an atomic oxygen-resistant polyimide nanofiber membrane as well as a preparation method and application thereof. A polyhedral oligomeric silsesquioxane (POSS) structure and a diphenyl phosphorus oxide (PPO) structure are introduced into a polyimide structure, and a silicon dioxide passivation layer and a phosphate protection layer are generated during atomic oxygen erosion, so that the polyimide nanofiber membrane has excellent long-term atomic oxygen erosion resistance.

Description

technical field [0001] The invention belongs to the technical field of functional fiber materials, and in particular relates to an atomic oxygen-resistant polyimide nanofiber membrane and a preparation method and application thereof. Background technique [0002] Low Earth Orbit (LEO) refers to the space region between 200 and 1000 km from the Earth's surface. More and more spacecraft, including the manned space station under construction in my country, are operating in this orbit. There are a variety of environmental factors in low Earth orbit that affect the lifetime of spacecraft, including atomic oxygen (AO), thermal cycling, space debris, and vacuum ultraviolet. Among them, atomic oxygen will seriously affect the service life of high molecular polymer materials for spacecraft. In low-Earth orbit, when a spacecraft running at a speed of 7.9km / s collides with AO, an energy of up to 4-5eV will be generated, while the bond energy of common chemical bonds such as C-C bonds...

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
IPC IPC(8): D04H1/728C08G73/10D01F6/78
CPCD04H1/728C08G73/1071C08G73/1007D01F6/78Y02E60/10
Inventor 刘金刚张燕吴昊职欣心祁浩然高艳爽陈淑静
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com