As wireless devices and high-frequency electronics become more widespread, materials that prevent electromagnetic interference are increasingly important. Many conductive shields work primarily by reflecting incoming waves, which can create unwanted secondary radiation. Polymer composites offer a lightweight and versatile alternative, and biochar provides a renewable source of conductive carbon.
Researchers have demonstrated a technique that uses powdered eggshells to produce high-quality magnesium alloys, which have a wide variety of automotive, aerospace and biomedical applications.
Researchers converted lignocellulosic pulp recovered from unrecyclable household waste, along with its post-hydrolysis residue, into reinforcements for biodegradable poly(L-lactide) composites. At 30 wt% loading, both waste-derived materials increased PLLA stiffness to about 6 GPa and accelerated disintegration under simulated industrial composting conditions.
A research team led by Dr. Taehoon Kim of the Composites & Convergence Materials Research Division at the Korea Institute of Materials Science (KIMS), headed by President Chul-jin Choi, has collaborated with research teams led by Dr. Seon Joon Kim and Dr. Jaewoo Kim of the Korea Institute of Science and Technology (KIST) to develop an ultrathin composite film that combines electromagnetic interference (EMI) shielding, infrared (IR) stealth, and high mechanical strength.
Researchers developed biodegradable films from mango kernel starch and eggshell powder, identifying a formulation that combined tensile strength, flexibility, low moisture content, and improved thermal stability. The selected film lost 36.43% of its mass during a 28-day controlled soil-burial test, although the authors caution that degradation rates may differ under other environmental conditions.
Researchers developed lightweight polyester camouflage fabrics coated with screen-printed polymer composites containing carbon black-based pigments and tested their radar attenuation, thermal transmission, and mechanical durability. The study found that electromagnetic performance depended on pigment formulation, binder chemistry, coating uptake, and textile structure, with the strongest attenuation recorded in the tested 8-12 GHz X-band.
“No flying machine will ever fly from New York to Paris,” aviation pioneer Orville Wright once said. What even the visionary Wright brothers considered impossible is now a reality – thanks in part to new materials that make modern aircraft and engines possible in the first place.
Weight reduction and improved energy efficiency are two of the major challenges facing the aeronautics industry as it transitions towards more sustainable models.
What until recently was considered one of the most challenging waste streams of the energy transition could become a valuable source of raw materials for new industrial products. More than 20 square meters of recovered wind turbine blade sections—equivalent to the surface area of two-family cars—are being given a second life through the European REWIND project in applications such as electric vehicles and insulation materials.
Researchers at the U.S. Department of Energy’s Manufacturing Demonstration Facility at Oak Ridge National Laboratory have introduced an innovation in additive manufacturing by integrating origami-inspired 3D printing techniques with hybrid composites — materials made from mixed reinforcing components.
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