Fabrication and investigations on BMI/OMMT nanocomposites with superior high-temperature wave-transparent performance
- PDF / 4,615,786 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 63 Downloads / 160 Views
Fabrication and investigations on BMI/OMMT nanocomposites with superior high‑temperature wave‑transparent performance Yumeng Mao1 · Zhengjun Yao1,2 · Jintang Zhou1,2 · Bo Wei1,2 · Lei Lei1,2 · Huiyuan Fan1,2 Received: 23 June 2020 / Accepted: 3 August 2020 / Published online: 9 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this work, stearyltrimethylammoium bromide (STAB) was used to modify montmorillonite (MMT). Subsequently, the modified organic montmorillonite (OMMT) was added into 4,4′-Bismaleimidodiphenyl methane (BDM) and 2,2′-Diallylbisphenol A (DBA) copolymerization system to prepare BDM/OMMT wave-transparent nanocomposites with 0–5 wt% OMMT content. It is found that the addition of OMMT improves the microstructure, thermal properties, and wave-transparent properties of BDM composites. At the addition of 2 wt%, the thermal stability of the resin system is the best, and the fracture morphology changes from brittle fracture characteristics to ductile fracture characteristics. Meanwhile, in X-band (8–12 GHz), OMMT-2 wt% with the thickness less than 2 mm or within 8–10 mm has excellent transmittance (> 90%). Moreover, the effect of temperature change on the wave-transparent performance of BDM/OMMT nanocomposites is investigated. From room temperature to 200 °C, the stability of high-temperature transmittance of OMMT-2 wt% is enhanced, and it still has good transmittance (> 90%) within in a wide thickness range at 200 °C. The enhancement of these properties is closely correlated with the interaction interface formed between OMMT and BDM resin matrix. The addition of OMMT can increase the design selection of BDM resin system and expand its application as a wave-transparent material.
1 Introduction Microwave transparent materials refer to materials that can transmit electromagnetic waves and hardly change the properties of electromagnetic waves (including energy). They are widely used in ground radars, ship radars, airborne radars, and antenna windows and radomes of aircraft, missiles, satellites, etc. [1–3]. With the ever-deepening research of aerospace technology and civil technology, the requirements for the properties of wave-transparent materials are constantly improving, which requires the realization of broadband, high efficiency, and stable wave-transparent as well as the integration of wave transmission, heat resistance, and structure [4–7]. Therefore, the wave-transparent composites need to possess many functional properties at the same time, * Zhengjun Yao [email protected] 1
College of Materials and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China
Key Laboratory of Material Preparation and Protection for Harsh Environment, Nanjing University of Aeronautics and Astronautics, Ministry of Industry and Information Technology, Nanjing 211100, China
2
including excellent dielectric properties, heat resistance, high stiffness, and so on. The research and development of novel high-performance wave-transparent compos
Data Loading...
