Polyacrylonitrile-based carbon fiber and stabilization method thereof
A polyacrylonitrile-based carbon fiber and polyacrylonitrile-based technology, which is applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve problems such as affecting the performance of carbon fiber products, reduce the skin-core effect, improve mechanical properties, and improve thermal stability. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example 1
[0046] A polyacrylonitrile-based fiber precursor, specifically an acrylonitrile-itaconic acid copolymer fiber precursor, the preparation method is as follows:
[0047] (1) Dissolve itaconic acid monomer (IA), azobisisobutyronitrile (AIBN) and acrylonitrile monomer (AN) in dimethyl sulfoxide (DMSO), the sum of the concentrations of the two monomers is 5.71mmol / mL, the molar weight of AIBN is 0.2% of the total molar weight of the two monomers, and the molar ratio of acrylonitrile to itaconic acid is 98:2. into pure water, the product is precipitated and purified; the product is washed and dried to obtain an acrylonitrile-itaconic acid copolymer with a molar percentage of acrylonitrile-based structural units of 98%;
[0048] (2) wet spinning the acrylonitrile-itaconic acid copolymer obtained in step (1) to obtain the acrylonitrile-itaconic acid copolymer fiber precursor.
preparation example 2
[0050] A polyacrylonitrile-based fiber precursor, specifically a polyacrylonitrile fiber precursor, the preparation method is as follows:
[0051] The polyacrylonitrile fiber precursor with a weight average molecular weight of 210,000 and a molecular weight distribution of 1.5 is wet-spun to obtain the polyacrylonitrile fiber precursor.
Embodiment 1
[0053] A method for stabilizing polyacrylonitrile-based carbon fibers, comprising:
[0054] (1) Low-temperature treatment: the acrylonitrile-itaconic acid copolymer fiber precursor obtained in Preparation Example 1 is placed in a tube furnace after being packed into a magnetic boat, and nitrogen is charged after vacuuming three times, and the nitrogen gas flow is 25mL / min. Keep the oxygen concentration at 0%, set the heating rate of the tube furnace at 5°C / min, heat up to 195°C and hold the temperature for 20 minutes, heat up to 205°C and hold the temperature for 20 minutes, then raise the temperature to 215°C and keep the temperature for 20 minutes, and finally raise the temperature to 220°C, the treatment time at 150-220°C is 74min;
[0055] (2) Medium temperature treatment: after low temperature treatment, keep the nitrogen gas flow at 25mL / min (oxygen concentration is 0), the heating rate is 5°C / min, heat up to 230°C and hold for 20 minutes, then raise the temperature to 2...
PUM
Property | Measurement | Unit |
---|---|---|
tensile strength | aaaaa | aaaaa |
tensile strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com