Alginate Beads and Epoxy Resin Composites as Candidates for Microwave Absorbers

Abstract

Abstract-This paper presents a new composite material, which is developed by mixing calcium alginate spheres with commercially available epoxies Stycas 2850 FT (s2850) and Stycast W19 (W19). The resulting composite material is examined in terms of transmission and reflection coefficients in microwave frequencies (26 to 40 GHz, 70 to 110 GHz and 300 to 320 GHz). The study reveals that the new material exhibits reflection coefficients much lower than some commercial CR absorbers from the Eccosorb group. The experimental results justify the use of the new composite material as absorber at microwave frequencies.

Candidate for Tissue Mimicking Material Made of an Epoxy Matrix Loaded With Alginate Microspheres

“…Various technologies yield spherical hydrogels with diameters in the range of a few microns to few millimeters. The idea to incorporate empty and iron loaded alginate microspheres into an epoxy matrix was presented for the first time in [19]. The initial motivation for such work was related to the design of absorbing materials which exhibit low reflection and good absorption properties at microwave frequencies up to 360 GHz.…”

“…Procedures for preparing Ca-alg spheres as well as composite samples are described in detail in [19] and will briefly be repeated here.…”