Preparation and properties of polyimide/carbon nanotube composite films with electromagnetic wave absorption performance

Abstract

The polyimide (PI)/carbon nanotube (CNT) films including 3,3′,4,4′‐biphenyl tetracarboxylic dianhydride (BPDA), p‐phenylenediamine (p‐PDA), and CNTs were prepared, which have prominent electromagnetic (EM) wave absorption performance. Experimental analyses of the mechanical properties, thermal stabilities, coefficient of thermal expansion (CTE), the glass transition temperature (Tg), and EM parameter revealed the beneficial effects of the CNTs on the resulting composite films. In particular, when the content of CNTs is 6 wt%, the film shows the highest EM wave absorption performance, which exhibits the effective absorption bandwidth of 2.72 GHz with the matching thickness of only 2.0 mm. These results indicate that PI‐based films have a certain potential application in the area of EM wave‐absorbing materials.

Facile preparation and properties of polybenzoxazine/graphene porous nanocomposites for electromagnetic wave absorption

“…With the development of radar detection technology, the improvement of the stealth performance of modern aircrafts has become a research focus. [1,2] Here, electromagnetic wave absorbing materials are a key to achieve the stealth performance by converting incident microwave into thermal energy via electrical/magnetic losses. [3,4] Today, electromagnetic wave absorbing materials with lightweight, high heat resistance, high mechanical strength, and good electromagnetic absorption ability are needed to meet the new requirements.…”

Preparation and characterization of porous polyimide fibers with electromagnetic wave absorption properties

“…It is urgent to develop high-performance EMWA materials that are "thin, light, wide, and strong." [5][6][7] In the field of EMWA materials, single functional materials such as coated EMWA materials cannot meet the increasing needs of modern technological development. [8][9][10] In recent years, the works focus on the EMWA materials with integration of the structure and function have been reported, realizing the reduction of weight and enhancing the comprehensive performance of the system.…”

“…In the field of electromagnetic contamination protection and stealth detection technology, people have higher and higher requirements for EMWA materials with the continuous development of the material field, especially structural EMWA materials. It is urgent to develop high‐performance EMWA materials that are “thin, light, wide, and strong.” [ 5–7 ]…”

Carboxylated Carbon Nanotube/Polyimide Films with Low Thermal Expansion Coefficient and Excellent Mechanical Properties

“…Ju et al [ 34 ] reported the fabrication of multiwalled CNTs/polyacrylonitrile fibers by electrospinning, which exhibited an electrical conductivity of 96 S/m at a nanotube loading of 3 wt.%. Jiang et al [ 35 ] prepared multiwalled CNTs/PI composites, including 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), p-phenylenediamine (p-PDA), which showed the effective absorption bandwidth of 2.72 GHz with the matching thickness of only 2.0 mm when the content of CNTs was 6 wt.%, and the tensile modulus and tensile strength of the composites all reached their maximum values of 4.9 GPa and 281.3 MPa when the content of CNTs was 0.5 wt.%, respectively.…”