Radar Absorbing Material Based On Skin Collagen Fibers
Keywords
Skin Collagen Fiber, Chemical Modification, Absorbing Material, Reflection Loss (Rl)
Abstract
Collagen fibers (CF) with Schiff base structure were reacted with salicylaldehyde to obtain collagen fibers (Sa-CF) with Schiff base structure, which were further coordinated and combined with Fe3+ to prepare radar absorbing materials based on collagen fibers (Fe-Sa- CF). The electromagnetic parameters and radar absorption characteristics in the frequency range of 1.0~18.0GHz were measured using the coaxial line transmission/reflection method and the radar wave scattering cross section (RCS) method. The study showed that the conductivity of CF was 1.08 ¡Á10?11S/cm, and the electrical conductivity of Fe-Sa-CF obtained by chemical modification is increased to 2.86¡Á10?6S/cm; at the same time, its dielectric loss angle tangent (tan) in the frequency range of 1.0~18.0GHz ?) is also improved. Therefore, Fe-Sa-CF is an electrical loss absorbing material. Sa-CF (thickness 1.0mm) has certain absorbing performance in the range of 3.0~18.0GHz, and the maximum reflection loss of radar waves (RL )for? 4.37dB; the absorption band of Fe-Sa-CF is broadened, and it shows good radar absorption performance in the range of 1.0~18.0GHz. The highest RL value is ?9.23dB. As the thickness of Fe-Sa-CF increases, , the radar wave absorption intensity is further improved. When the thickness is 2.0mm, what is the RL value of radar waves with frequencies between 7.0~18.0GHz? 15.0~? 18.0dB. Therefore, after chemical modification, skin collagen fibers can be made into new radar absorbing materials with thin thickness, low density, light weight, wide absorption frequency band, and high absorption intensity.
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Original research was done by Liu Yishan, Huang Xin, Guo Peipei, Liao Xuepin, Shi Bi
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