Preparation of high breakdown strength meta‐aramid composite paper reinforced by polyphenylene sulfide superfine fiber

Abstract

Meta-aramid paper has been widely used in transformers because of its excellent insulation properties and thermal stability. However, with the rapid development of high-voltage transformers, higher requirements are placed on the breakdown strength of meta-aramid paper. In this study, meta-aramid chopped fibers/polyphenylene sulfide (MACFs/PPS) composite paper was prepared by a combination of wet-copying and hot-rolling technology. Then the microscopic morphology, mechanical properties, crystallization behavior, insulation properties, and thermal stability of the MACFs/PPS composite paper were studied and evaluated. The experimental results showed that the breakdown strength of the MACFs/PPS composite paper was as high as 46.46 kV/ mm, which was 2.7 times higher than the famous Nomex T410 insulating paper. Meanwhile, the MACFs/PPS composite paper presented good mechanical properties and thermal stability. This paper provides a simple and versatile method for the preparation of meta-aramid composite paper with high breakdown strength.

Three-Dimensional Finite Element Modeling of Ultrasonic Vibration-Assisted Milling of the Nomex Honeycomb Structure

“…In this work, the material constituting the NHC core exhibits isotropic elastoplastic behavior [22,23]. This behavior is made up of two parts: a reversible elastic part and an irreversible plastic part, as described in Equation (1).…”

“…The aerospace and aeronautics sectors place significant emphasis on developing solutions that integrate lightweight materials with exceptional performance characteristics, particularly in demanding and extreme environments [1,2]. This pursuit is driven by the need to enhance fuel efficiency, reduce emissions, and improve overall operational efficiency in aircraft and spacecraft applications.…”

Electrospun Poly(m-phenyleneisophthalamide)/TiO2 Nanofiber Membranes for Particulate Matter Removal under High-Temperature Conditions

“…Poly­(m-phenyleneisophthalamide) (PMIA) is a high-performance fiber raw material with exceptional thermal stability, flame retardancy, electrical insulation, and chemical resistance. It has been widely applied in Nomex fibers, nanofiltration membranes, ultrafiltration membranes, as well as nanofiber membranes. − In view of this, the PMIA/TiO 2 composite nanofiber membrane was prepared via introducing TiO 2 nanoparticles to the PMIA electrospinning solution. The effects of TiO 2 nanoparticles on the morphology, pore structure, and air filtration performance of the PMIA/TiO 2 composite nanofiber membrane were investigated.…”

Enhancing the Machining Performance of Nomex Honeycomb Composites Using Rotary Ultrasonic Machining: A Finite Element Analysis Approach

“…The aerospace and aeronautics industries are strongly focused on the search for solutions offering both lightness and exceptional performance, particularly in extreme environments and conditions [1]. Nomex honeycomb composites (NHCs) meet these standards by providing high specific strength and stiffness [2][3][4].…”