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Updated: Jan 15, 2026
Disentangling High Strength Copolymer Aramid Fibers to Enable the Determination of Their Mechanical Properties
Published on: September 1, 2018
Micro/Nanofiber-Network Assembled Aramid Paper with Excellent Mechanical and Electrical Insulating Properties
Bin Yang1, Yifan Wang1, Yi Zhou1
1College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of papermaking Technology and Specialty paper Development, Shaanxi University of Science & Technology, No. 6, Xuefu Road, Xi'an 710021, China.
A new composite nanopaper made from aramid nanofibers (ANF) and poly(m-phenylene isophthalamide) (PMIA) fibers significantly enhances tear strength and dielectric properties for advanced electrical insulation applications.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Aramid nanofiber (ANF) paper shows promise for electrical insulation due to high dielectric strength.
- However, ANF paper has poor tear strength, limiting its practical use.
- This weakness stems from strong hydrogen bonds and immobile nodes in the ANF network, hindering energy dissipation.
Purpose of the Study:
- To develop a novel composite nanopaper with improved tear strength and dielectric properties.
- To investigate the effect of a reinforced-concrete architecture using poly(m-phenylene isophthalamide) (PMIA) fibers and ANF.
- To enhance energy dissipation mechanisms for better mechanical durability.
Main Methods:
- Fabrication of a PMIA@ANF composite nanopaper with a reinforced-concrete architecture.
- Optimization of nodal strength and density within the ANF network.
- Characterization of mechanical properties (tear strength) and dielectric strength.
Main Results:
- The PMIA@ANF composite nanopaper achieved a tear strength of 1899 mN, a 47.5-fold improvement over ANF paper.
- A dielectric strength of 82.8 kV·mm⁻¹ was recorded, surpassing existing electrical insulation composites.
- The composite demonstrated excellent performance retention under extreme temperatures and corrosive environments.
Conclusions:
- The reinforced-concrete architecture of PMIA@ANF synergistically balances structural durability and dielectric reliability.
- This composite offers superior tear and dielectric strength compared to previous materials.
- PMIA@ANF nanopaper is a strong candidate for advanced electrical insulation in demanding applications.
